#include "dstm.h"
+#include "debugmacro.h"
#include "ip.h"
-#include "clookup.h"
#include "machinepile.h"
-#include "mlookup.h"
+#include "altmlookup.h"
#include "llookup.h"
#include "plookup.h"
-#include "prelookup.h"
+#include "altprelookup.h"
+#include "threadnotify.h"
#include "queue.h"
-#include <pthread.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <errno.h>
-#include <time.h>
-#include <string.h>
-#include <pthread.h>
-
-#define LISTEN_PORT 2156
-#define RECEIVE_BUFFER_SIZE 2048
-#define NUM_THREADS 10
-#define PREFETCH_CACHE_SIZE 1048576 //1MB
+#include "addUdpEnhance.h"
+#include "addPrefetchEnhance.h"
+#include "gCollect.h"
+#include "dsmlock.h"
+#include "prefetch.h"
+#ifdef COMPILER
+#include "thread.h"
+#endif
+#ifdef ABORTREADERS
+#include "abortreaders.h"
+#endif
+#include "trans.h"
+
+#define NUM_THREADS 1
#define CONFIG_FILENAME "dstm.conf"
+//#define LOGEVENTS //turn on Logging events
+#ifdef LOGEVENTS
+char bigarray[16*1024*1024];
+int bigindex=0;
+#define LOGEVENT(x) { \
+ int tmp=bigindex++; \
+ bigarray[tmp]=x; \
+ }
+#else
+#define LOGEVENT(x)
+#endif
+
+//#define LOGTIMES
+#ifdef LOGTIMES
+char bigarray1[6*1024*1024];
+unsigned int bigarray2[6*1024*1024];
+unsigned int bigarray3[6*1024*1024];
+long long bigarray4[6*1024*1024];
+int bigarray5[6*1024*1024];
+int bigindex1=0;
+#define LOGTIME(x,y,z,a,b) {\
+ int tmp=bigindex1; \
+ bigarray1[tmp]=x; \
+ bigarray2[tmp]=y; \
+ bigarray3[tmp]=z; \
+ bigarray4[tmp]=a; \
+ bigarray5[tmp]=b; \
+ bigindex1++; \
+}
+#else
+#define LOGTIME(x,y,z,a,b)
+#endif
+
+/* Thread transaction variables */
+__thread objstr_t *t_cache;
+__thread struct ___Object___ *revertlist;
+__thread struct timespec exponential_backoff;
+__thread int count_exponential_backoff;
+__thread const int max_exponential_backoff = 1000; // safety limit
+#ifdef SANDBOX
+__thread int trans_allocation_bytes;
+#endif
+
+
+#ifdef ABORTREADERS
+__thread int t_abort;
+__thread jmp_buf aborttrans;
+#endif
+
+int globalid=0; /* This variable is a unique global identifier for a sendPrefetch request */
+
/* Global Variables */
extern int classsize[];
-extern primarypfq_t pqueue; //Shared prefetch queue
-extern mcpileq_t mcqueue; //Shared queue containing prefetch requests sorted by remote machineids
-objstr_t *prefetchcache; //Global Prefetch cache
-pthread_mutex_t prefetchcache_mutex;// Mutex to lock Prefetch Cache
+pfcstats_t *evalPrefetch;
+extern int numprefetchsites; //Global variable containing number of prefetch sites
+extern pthread_mutex_t mainobjstore_mutex; // Mutex to lock main Object store
+pthread_mutex_t prefetchcache_mutex; // Mutex to lock Prefetch Cache
pthread_mutexattr_t prefetchcache_mutex_attr; /* Attribute for lock to make it a recursive lock */
-extern pthread_mutex_t mainobjstore_mutex;// Mutex to lock main Object store
extern prehashtable_t pflookup; //Global Prefetch cache's lookup table
pthread_t wthreads[NUM_THREADS]; //Worker threads for working on the prefetch queue
-pthread_t tPrefetch; /* Primary Prefetch thread that processes the prefetch queue */
+pthread_t tPrefetch; /* Primary Prefetch thread that processes the prefetch queue */
extern objstr_t *mainobjstore;
unsigned int myIpAddr;
unsigned int *hostIpAddrs;
unsigned int oidsPerBlock;
unsigned int oidMin;
unsigned int oidMax;
+sockPoolHashTable_t *transReadSockPool;
+sockPoolHashTable_t *transPrefetchSockPool;
+sockPoolHashTable_t *transRequestSockPool;
+pthread_mutex_t notifymutex;
+pthread_mutex_t atomicObjLock;
+
+/***********************************
+ * Global Variables for statistics
+ **********************************/
+int numTransCommit = 0;
+int numTransAbort = 0;
+int nchashSearch = 0;
+int nmhashSearch = 0;
+int nprehashSearch = 0;
+int ndirtyCacheObj = 0;
+int nRemoteSend = 0;
+int nSoftAbort = 0;
+int bytesSent = 0;
+int bytesRecv = 0;
+int totalObjSize = 0;
+int sendRemoteReq = 0;
+int getResponse = 0;
void printhex(unsigned char *, int);
+plistnode_t *createPiles();
+plistnode_t *sortPiles(plistnode_t *pileptr);
+
+/*******************************
+* Send and Recv function calls
+*******************************/
+void send_data(int fd, void *buf, int buflen) {
+ char *buffer = (char *)(buf);
+ int size = buflen;
+ int numbytes;
+ while (size > 0) {
+ numbytes = send(fd, buffer, size, MSG_NOSIGNAL);
+ bytesSent = bytesSent + numbytes;
+ if (numbytes == -1) {
+ perror("send");
+ exit(0);
+ }
+ buffer += numbytes;
+ size -= numbytes;
+ }
+}
-void printhex(unsigned char *ptr, int numBytes)
-{
- int i;
- for (i = 0; i < numBytes; i++)
- {
- if (ptr[i] < 16)
- printf("0%x ", ptr[i]);
- else
- printf("%x ", ptr[i]);
- }
- printf("\n");
- return;
+void send_buf(int fd, struct writestruct * sendbuffer, void *buffer, int buflen) {
+ if (buflen+sendbuffer->offset>WMAXBUF) {
+ send_data(fd, sendbuffer->buf, sendbuffer->offset);
+ sendbuffer->offset=0;
+ send_data(fd, buffer, buflen);
+ return;
+ }
+ memcpy(&sendbuffer->buf[sendbuffer->offset], buffer, buflen);
+ sendbuffer->offset+=buflen;
+ if (sendbuffer->offset>WTOP) {
+ send_data(fd, sendbuffer->buf, sendbuffer->offset);
+ sendbuffer->offset=0;
+ }
+}
+
+void forcesend_buf(int fd, struct writestruct * sendbuffer, void *buffer, int buflen) {
+ if (buflen+sendbuffer->offset>WMAXBUF) {
+ send_data(fd, sendbuffer->buf, sendbuffer->offset);
+ sendbuffer->offset=0;
+ send_data(fd, buffer, buflen);
+ return;
+ }
+ memcpy(&sendbuffer->buf[sendbuffer->offset], buffer, buflen);
+ sendbuffer->offset+=buflen;
+ send_data(fd, sendbuffer->buf, sendbuffer->offset);
+ sendbuffer->offset=0;
+}
+
+int recvw(int fd, void *buf, int len, int flags) {
+ return recv(fd, buf, len, flags);
+}
+
+void recv_data_buf(int fd, struct readstruct * readbuffer, void *buffer, int buflen) {
+ char *buf=(char *)buffer;
+ int numbytes=readbuffer->head-readbuffer->tail;
+ if (numbytes>buflen)
+ numbytes=buflen;
+ if (numbytes>0) {
+ memcpy(buf, &readbuffer->buf[readbuffer->tail], numbytes);
+ readbuffer->tail+=numbytes;
+ buflen-=numbytes;
+ buf+=numbytes;
+ }
+ if (buflen==0) {
+ return;
+ }
+ if (buflen>=MAXBUF) {
+ recv_data(fd, buf, buflen);
+ return;
+ }
+
+ int maxbuf=MAXBUF;
+ int obufflen=buflen;
+ readbuffer->head=0;
+
+ while (buflen > 0) {
+ int numbytes = recvw(fd, &readbuffer->buf[readbuffer->head], maxbuf, 0);
+ if (numbytes == -1) {
+ perror("recv");
+ exit(0);
+ }
+ bytesRecv+=numbytes;
+ buflen-=numbytes;
+ readbuffer->head+=numbytes;
+ maxbuf-=numbytes;
+ }
+ memcpy(buf,readbuffer->buf,obufflen);
+ readbuffer->tail=obufflen;
+}
+
+int recv_data_errorcode_buf(int fd, struct readstruct * readbuffer, void *buffer, int buflen) {
+ char *buf=(char *)buffer;
+ //now tail<=head
+ int numbytes=readbuffer->head-readbuffer->tail;
+ if (numbytes>buflen)
+ numbytes=buflen;
+ if (numbytes>0) {
+ memcpy(buf, &readbuffer->buf[readbuffer->tail], numbytes);
+ readbuffer->tail+=numbytes;
+ buflen-=numbytes;
+ buf+=numbytes;
+ }
+ if (buflen==0)
+ return 1;
+
+ if (buflen>=MAXBUF) {
+ return recv_data_errorcode(fd, buf, buflen);
+ }
+
+ int maxbuf=MAXBUF;
+ int obufflen=buflen;
+ readbuffer->head=0;
+
+ while (buflen > 0) {
+ int numbytes = recvw(fd, &readbuffer->buf[readbuffer->head], maxbuf, 0);
+ if (numbytes ==0) {
+ return 0;
+ }
+ if (numbytes==-1) {
+ perror("recvbuf");
+ return -1;
+ }
+ bytesRecv+=numbytes;
+ buflen-=numbytes;
+ readbuffer->head+=numbytes;
+ maxbuf-=numbytes;
+ }
+ memcpy(buf,readbuffer->buf,obufflen);
+ readbuffer->tail=obufflen;
+ return 1;
+}
+
+
+void recv_data(int fd, void *buf, int buflen) {
+ char *buffer = (char *)(buf);
+ int size = buflen;
+ int numbytes;
+ while (size > 0) {
+ numbytes = recvw(fd, buffer, size, 0);
+ bytesRecv = bytesRecv + numbytes;
+ if (numbytes == -1) {
+ perror("recv");
+ exit(0);
+ }
+ buffer += numbytes;
+ size -= numbytes;
+ }
+}
+
+int recv_data_errorcode(int fd, void *buf, int buflen) {
+ char *buffer = (char *)(buf);
+ int size = buflen;
+ int numbytes;
+ while (size > 0) {
+ numbytes = recvw(fd, buffer, size, 0);
+ if (numbytes==0)
+ return 0;
+ if (numbytes == -1) {
+ perror("recv");
+ return -1;
+ }
+ bytesRecv+=numbytes;
+ buffer += numbytes;
+ size -= numbytes;
+ }
+ return 1;
+}
+
+void printhex(unsigned char *ptr, int numBytes) {
+ int i;
+ for (i = 0; i < numBytes; i++) {
+ if (ptr[i] < 16)
+ printf("0%x ", ptr[i]);
+ else
+ printf("%x ", ptr[i]);
+ }
+ printf("\n");
+ return;
}
-plistnode_t *createPiles(transrecord_t *);
inline int arrayLength(int *array) {
- int i;
- for(i=0 ;array[i] != -1; i++)
- ;
- return i;
+ int i;
+ for(i=0 ; array[i] != -1; i++)
+ ;
+ return i;
}
+
inline int findmax(int *array, int arraylength) {
- int max, i;
- max = array[0];
- for(i = 0; i < arraylength; i++){
- if(array[i] > max) {
- max = array[i];
- }
- }
- return max;
+ int max, i;
+ max = array[0];
+ for(i = 0; i < arraylength; i++) {
+ if(array[i] > max) {
+ max = array[i];
+ }
+ }
+ return max;
}
+
+#define INLINEPREFETCH
+#define PREFTHRESHOLD 0
+
/* This function is a prefetch call generated by the compiler that
* populates the shared primary prefetch queue*/
-void prefetch(int ntuples, unsigned int *oids, unsigned short *endoffsets, short *arrayfields) {
- int qnodesize;
- int len = 0;
-
- /* Allocate for the queue node*/
- char *node;
- qnodesize = sizeof(prefetchqelem_t) + sizeof(int) + ntuples * (sizeof(short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(short);
- if((node = calloc(1, qnodesize)) == NULL) {
- printf("Calloc Error %s, %d\n", __FILE__, __LINE__);
- return;
- }
- /* Set queue node values */
- len = sizeof(prefetchqelem_t);
- memcpy(node + len, &ntuples, sizeof(int));
- len += sizeof(int);
- memcpy(node + len, oids, ntuples*sizeof(unsigned int));
- len += ntuples * sizeof(unsigned int);
- memcpy(node + len, endoffsets, ntuples*sizeof(short));
- len += ntuples * sizeof(short);
- memcpy(node + len, arrayfields, endoffsets[ntuples-1]*sizeof(short));
- /* Lock and insert into primary prefetch queue */
- pthread_mutex_lock(&pqueue.qlock);
- pre_enqueue((prefetchqelem_t *)node);
- pthread_cond_signal(&pqueue.qcond);
- pthread_mutex_unlock(&pqueue.qlock);
+void prefetch(int siteid, int ntuples, unsigned int *oids, unsigned short *endoffsets, short *arrayfields) {
+ /* Allocate for the queue node*/
+ int qnodesize = 2*sizeof(int) + ntuples * (sizeof(unsigned short) + sizeof(unsigned int)) + endoffsets[ntuples - 1] * sizeof(short);
+ int len;
+#ifdef INLINEPREFETCH
+ int attempted=0;
+ char *node;
+ do {
+ node=getmemory(qnodesize);
+ if (node==NULL&&attempted)
+ break;
+ if (node!=NULL) {
+#else
+ char *node=getmemory(qnodesize);
+#endif
+ int top=endoffsets[ntuples-1];
+
+ if (node==NULL) {
+ LOGEVENT('D');
+ return;
+ }
+ /* Set queue node values */
+
+ /* TODO: Remove this after testing */
+ evalPrefetch[siteid].callcount++;
+
+ *((int *)(node))=siteid;
+ *((int *)(node + sizeof(int))) = ntuples;
+ len = 2*sizeof(int);
+ memcpy(node+len, oids, ntuples*sizeof(unsigned int));
+ memcpy(node+len+ntuples*sizeof(unsigned int), endoffsets, ntuples*sizeof(unsigned short));
+ memcpy(node+len+ntuples*(sizeof(unsigned int)+sizeof(short)), arrayfields, top*sizeof(short));
+
+#ifdef INLINEPREFETCH
+ movehead(qnodesize);
+ }
+ int numpref=numavailable();
+ attempted=1;
+
+ if (node==NULL && numpref!=0 || numpref>=PREFTHRESHOLD) {
+ node=gettail();
+ prefetchpile_t *pilehead = foundLocal(node,numpref,siteid);
+ if (pilehead!=NULL) {
+ // Get sock from shared pool
+
+ /* Send Prefetch Request */
+ prefetchpile_t *ptr = pilehead;
+ while(ptr != NULL) {
+ globalid++;
+ int sd = getSock2(transPrefetchSockPool, ptr->mid);
+ sendPrefetchReq(ptr, sd, globalid);
+ ptr = ptr->next;
+ }
+
+ mcdealloc(pilehead);
+ }
+ resetqueue();
+ }//end do prefetch if condition
+ } while(node==NULL);
+#else
+ /* Lock and insert into primary prefetch queue */
+ movehead(qnodesize);
+#endif
}
/* This function starts up the transaction runtime. */
int dstmStartup(const char * option) {
- pthread_t thread_Listen;
+ pthread_t thread_Listen, udp_thread_Listen;
pthread_attr_t attr;
int master=option!=NULL && strcmp(option, "master")==0;
+ int fd;
+ int udpfd;
+
+ if (processConfigFile() != 0)
+ return 0; //TODO: return error value, cause main program to exit
+#ifdef COMPILER
+ if (!master)
+ threadcount--;
+#endif
+
+#ifdef TRANSSTATS
+ printf("Trans stats is on\n");
+ fflush(stdout);
+#endif
+#ifdef ABORTREADERS
+ initreaderlist();
+#endif
- if (processConfigFile() != 0)
- return 0; //TODO: return error value, cause main program to exit
+ //Initialize socket pool
+ transReadSockPool = createSockPool(transReadSockPool, DEFAULTSOCKPOOLSIZE);
+ transPrefetchSockPool = createSockPool(transPrefetchSockPool, DEFAULTSOCKPOOLSIZE);
+ transRequestSockPool = createSockPool(transRequestSockPool, DEFAULTSOCKPOOLSIZE);
dstmInit();
transInit();
+ fd=startlistening();
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+#ifdef CACHE
+ udpfd = udpInit();
+ pthread_create(&udp_thread_Listen, &attr, udpListenBroadcast, (void*)udpfd);
+#endif
if (master) {
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
- pthread_create(&thread_Listen, &attr, dstmListen, NULL);
+ pthread_create(&thread_Listen, &attr, dstmListen, (void*)fd);
return 1;
} else {
- dstmListen();
+ dstmListen((void *)fd);
return 0;
}
+}
+
+//TODO Use this later
+void *pCacheAlloc(objstr_t *store, unsigned int size) {
+ void *tmp;
+ objstr_t *ptr;
+ ptr = store;
+ int success = 0;
+
+ while(ptr->next != NULL) {
+ /* check if store is empty */
+ if(((unsigned int)ptr->top - (unsigned int)ptr - sizeof(objstr_t) + size) <= ptr->size) {
+ tmp = ptr->top;
+ ptr->top += size;
+ success = 1;
+ return tmp;
+ } else {
+ ptr = ptr->next;
+ }
+ }
+ if(success == 0) {
+ return NULL;
+ }
}
+/* This function initiates the prefetch thread A queue is shared
+ * between the main thread of execution and the prefetch thread to
+ * process the prefetch call Call from compiler populates the shared
+ * queue with prefetch requests while prefetch thread processes the
+ * prefetch requests */
-/* This function initiates the prefetch thread
- * A queue is shared between the main thread of execution
- * and the prefetch thread to process the prefetch call
- * Call from compiler populates the shared queue with prefetch requests while prefetch thread
- * processes the prefetch requests */
void transInit() {
- int t, rc;
- int retval;
- //Create and initialize prefetch cache structure
- prefetchcache = objstrCreate(PREFETCH_CACHE_SIZE);
-
- /* Initialize attributes for mutex */
- pthread_mutexattr_init(&prefetchcache_mutex_attr);
- pthread_mutexattr_settype(&prefetchcache_mutex_attr, PTHREAD_MUTEX_RECURSIVE_NP);
-
- pthread_mutex_init(&prefetchcache_mutex, &prefetchcache_mutex_attr);
-
- //Create prefetch cache lookup table
- if(prehashCreate(HASH_SIZE, LOADFACTOR))
- return; //Failure
- //Initialize primary shared queue
- queueInit();
- //Initialize machine pile w/prefetch oids and offsets shared queue
- mcpileqInit();
- //Create the primary prefetch thread
-
- do {
- retval=pthread_create(&tPrefetch, NULL, transPrefetch, NULL);
- } while(retval!=0);
- pthread_detach(tPrefetch);
-
- //Create and Initialize a pool of threads
- /* Threads are active for the entire period runtime is running */
- for(t = 0; t< NUM_THREADS; t++) {
- do {
- rc = pthread_create(&wthreads[t], NULL, mcqProcess, (void *)t);
- } while(rc!=0);
- pthread_detach(wthreads[t]);
- }
+ //Create and initialize prefetch cache structure
+#ifdef CACHE
+ initializePCache();
+ if((evalPrefetch = initPrefetchStats()) == NULL) {
+ printf("%s() Error allocating memory at %s, %d\n", __func__, __FILE__, __LINE__);
+ exit(0);
+ }
+#endif
+
+ /* Initialize attributes for mutex */
+ pthread_mutexattr_init(&prefetchcache_mutex_attr);
+ pthread_mutexattr_settype(&prefetchcache_mutex_attr, PTHREAD_MUTEX_RECURSIVE_NP);
+
+ pthread_mutex_init(&prefetchcache_mutex, &prefetchcache_mutex_attr);
+ pthread_mutex_init(¬ifymutex, NULL);
+ pthread_mutex_init(&atomicObjLock, NULL);
+#ifdef CACHE
+ //Create prefetch cache lookup table
+ if(prehashCreate(PHASH_SIZE, PLOADFACTOR)) {
+ printf("ERROR\n");
+ return; //Failure
+ }
+
+ //Initialize primary shared queue
+ queueInit();
+ //Initialize machine pile w/prefetch oids and offsets shared queue
+ mcpileqInit();
+
+ //Create the primary prefetch thread
+ int retval;
+#ifdef RANGEPREFETCH
+ do {
+ retval=pthread_create(&tPrefetch, NULL, transPrefetchNew, NULL);
+ } while(retval!=0);
+#else
+#ifndef INLINEPREFETCH
+ do {
+ retval=pthread_create(&tPrefetch, NULL, transPrefetch, NULL);
+ } while(retval!=0);
+#endif
+#endif
+#ifndef INLINEPREFETCH
+ pthread_detach(tPrefetch);
+#endif
+#endif
}
/* This function stops the threads spawned */
void transExit() {
- int t;
- pthread_cancel(tPrefetch);
- for(t = 0; t < NUM_THREADS; t++)
- pthread_cancel(wthreads[t]);
+#ifdef CACHE
+ int t;
+ pthread_cancel(tPrefetch);
+ for(t = 0; t < NUM_THREADS; t++)
+ pthread_cancel(wthreads[t]);
+#endif
- return;
+ return;
}
/* This functions inserts randowm wait delays in the order of msec
* Mostly used when transaction commits retry*/
-void randomdelay(void)
-{
- struct timespec req, rem;
- time_t t;
-
- t = time(NULL);
- req.tv_sec = 0;
- req.tv_nsec = (long)(1000000 + (t%10000000)); //1-11 msec
- //nanosleep(&req, &rem);
- nanosleep(&req, NULL);
- return;
+void randomdelay() {
+ struct timespec req;
+ time_t t;
+
+ t = time(NULL);
+ req.tv_sec = 0;
+ req.tv_nsec = (long)(1000 + (t%10000)); //1-11 microsec
+ nanosleep(&req, NULL);
+ return;
+}
+
+void exponentialdelay() {
+ exponential_backoff.tv_nsec = exponential_backoff.tv_nsec * 2;
+ nanosleep(&exponential_backoff, NULL);
+ ++count_exponential_backoff;
+ if (count_exponential_backoff >= max_exponential_backoff) {
+ printf(" reached max_exponential_backoff at %s, %s(), %d\n", __FILE__, __func__, __LINE__);
+ exit(-1);
+ }
+ return;
}
/* This function initializes things required in the transaction start*/
-transrecord_t *transStart()
-{
- transrecord_t *tmp = malloc(sizeof(transrecord_t));
- tmp->cache = objstrCreate(1048576);
- tmp->lookupTable = chashCreate(HASH_SIZE, LOADFACTOR);
-#ifdef COMPILER
- tmp->revertlist=NULL;
+void transStart() {
+ t_cache = objstrCreate(1048576);
+ t_chashCreate(CHASH_SIZE, CLOADFACTOR);
+ revertlist=NULL;
+#ifdef SANDBOX
+ trans_allocation_bytes = 0;
+#endif
+#ifdef ABORTREADERS
+ t_abort=0;
#endif
- return tmp;
}
+// Search for an address for a given oid
+/*#define INLINE inline __attribute__((always_inline))
+
+INLINE void * chashSearchI(chashtable_t *table, unsigned int key) {
+ //REMOVE HASH FUNCTION CALL TO MAKE SURE IT IS INLINED HERE
+ chashlistnode_t *node = &table->table[(key & table->mask)>>1];
+
+ do {
+ if(node->key == key) {
+ return node->val;
+ }
+ node = node->next;
+ } while(node != NULL);
+
+ return NULL;
+ }*/
+
+
+
+
/* This function finds the location of the objects involved in a transaction
* and returns the pointer to the object if found in a remote location */
-objheader_t *transRead(transrecord_t *record, unsigned int oid) {
- unsigned int machinenumber;
- objheader_t *tmp, *objheader;
- objheader_t *objcopy;
- int size, rc, found = 0;
- void *buf;
- struct timespec ts;
- struct timeval tp;
-
- rc = gettimeofday(&tp, NULL);
-
- /* 1ms delay */
- tp.tv_usec += 1000;
- if (tp.tv_usec >= 1000000)
- {
- tp.tv_usec -= 1000000;
- tp.tv_sec += 1;
- }
- /* Convert from timeval to timespec */
- ts.tv_sec = tp.tv_sec;
- ts.tv_nsec = tp.tv_usec * 1000;
+__attribute__((pure)) objheader_t *transRead(unsigned int oid) {
+ unsigned int machinenumber;
+ objheader_t *tmp, *objheader;
+ objheader_t *objcopy;
+ int size;
+ void *buf;
+ chashlistnode_t *node;
+
+ if(oid == 0) {
+ return NULL;
+ }
+
- /* Search local transaction cache */
- if((objheader = (objheader_t *)chashSearch(record->lookupTable, oid)) != NULL){
+ node= &c_table[(oid & c_mask)>>1];
+ do {
+ if(node->key == oid) {
+#ifdef TRANSSTATS
+ nchashSearch++;
+#endif
#ifdef COMPILER
- return &objheader[1];
+ return &((objheader_t*)node->val)[1];
#else
- return objheader;
-#endif
- } else if ((objheader = (objheader_t *) mhashSearch(oid)) != NULL) {
- /* Look up in machine lookup table and copy into cache*/
- GETSIZE(size, objheader);
- size += sizeof(objheader_t);
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)objheader, size);
- /* Insert into cache's lookup table */
- chashInsert(record->lookupTable, OID(objheader), objcopy);
+ return node->val;
+#endif
+ }
+ node = node->next;
+ } while(node != NULL);
+
+
+ /*
+ if((objheader = chashSearchI(record->lookupTable, oid)) != NULL) {
+#ifdef TRANSSTATS
+ nchashSearch++;
+#endif
#ifdef COMPILER
- return &objcopy[1];
+ return &objheader[1];
#else
- return objcopy;
-#endif
- } else if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) { /* Look up in prefetch cache */
- GETSIZE(size, tmp);
- size+=sizeof(objheader_t);
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)tmp, size);
- /* Insert into cache's lookup table */
- chashInsert(record->lookupTable, OID(tmp), objcopy);
+ return objheader;
+#endif
+ } else
+ */
+
+#ifdef ABORTREADERS
+ if (t_abort) {
+ //abort this transaction
+ removetransactionhash();
+ objstrDelete(t_cache);
+ t_chashDelete();
+ _longjmp(aborttrans,1);
+ } else
+ addtransaction(oid);
+#endif
+
+ if ((objheader = (objheader_t *) mhashSearch(oid)) != NULL) {
+#ifdef TRANSSTATS
+ nmhashSearch++;
+#endif
+ /* Look up in machine lookup table and copy into cache*/
+ GETSIZE(size, objheader);
+ size += sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(&t_cache, size);
+ memcpy(objcopy, objheader, size);
+ /* Insert into cache's lookup table */
+ STATUS(objcopy)=0;
+ t_chashInsert(OID(objheader), objcopy);
#ifdef COMPILER
- return &objcopy[1];
+ return &objcopy[1];
#else
- return objcopy;
-#endif
- } else {
- /*If object not found in prefetch cache then block until object appears in the prefetch cache */
- pthread_mutex_lock(&pflookup.lock);
- while(!found) {
- rc = pthread_cond_timedwait(&pflookup.cond, &pflookup.lock, &ts);
- /* Check Prefetch cache again */
- if((tmp =(objheader_t *) prehashSearch(oid)) != NULL) {
- found = 1;
- GETSIZE(size,tmp);
- size+=sizeof(objheader_t);
- objcopy = objstrAlloc(record->cache, size);
- memcpy(objcopy, (void *)tmp, size);
- chashInsert(record->lookupTable, OID(tmp), objcopy);
- pthread_mutex_unlock(&pflookup.lock);
+ return objcopy;
+#endif
+ } else {
+#ifdef CACHE
+ if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) {
+ if(STATUS(tmp) & DIRTY) {
+#ifdef TRANSSTATS
+ ndirtyCacheObj++;
+#endif
+ goto remoteread;
+ }
+#ifdef TRANSSTATS
+ nprehashSearch++;
+#endif
+ /* Look up in prefetch cache */
+ GETSIZE(size, tmp);
+ size+=sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(&t_cache, size);
+ memcpy(objcopy, tmp, size);
+ /* Insert into cache's lookup table */
+ t_chashInsert(OID(tmp), objcopy);
#ifdef COMPILER
- return &objcopy[1];
+ return &objcopy[1];
#else
- return objcopy;
-#endif
- } else if (rc == ETIMEDOUT) {
-// printf("Wait timed out\n");
- pthread_mutex_unlock(&pflookup.lock);
- break;
- }
- }
-
- /* Get the object from the remote location */
- machinenumber = lhashSearch(oid);
- objcopy = getRemoteObj(record, machinenumber, oid);
- if(objcopy == NULL) {
- printf("Object not found in Remote location %s, %d\n", __FILE__, __LINE__);
- return NULL;
- } else {
+ return objcopy;
+#endif
+ }
+remoteread:
+#endif
+ /* Get the object from the remote location */
+ if((machinenumber = lhashSearch(oid)) == 0) {
+ printf("Error: %s() No machine found for oid =% %s,%dx\n",__func__, machinenumber, __FILE__, __LINE__);
+ return NULL;
+ }
+ objcopy = getRemoteObj(machinenumber, oid);
+
+ if(objcopy == NULL) {
+ printf("Error: Object not found in Remote location %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ } else {
+#ifdef TRANSSTATS
+ nRemoteSend++;
+#endif
#ifdef COMPILER
- return &objcopy[1];
+#ifdef CACHE
+ //Copy object to prefetch cache
+ pthread_mutex_lock(&prefetchcache_mutex);
+ objheader_t *headerObj;
+ int size;
+ GETSIZE(size, objcopy);
+ if((headerObj = prefetchobjstrAlloc(size + sizeof(objheader_t))) == NULL) {
+ printf("%s(): Error in getting memory from prefetch cache at %s, %d\n", __func__,
+ __FILE__, __LINE__);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ return NULL;
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ memcpy(headerObj, objcopy, size+sizeof(objheader_t));
+ //make an entry in prefetch lookup hashtable
+ prehashInsert(oid, headerObj);
+ LOGEVENT('B');
+#endif
+ return &objcopy[1];
#else
- return objcopy;
+ return objcopy;
#endif
- }
- }
+ }
+ }
+}
+
+
+/* This function finds the location of the objects involved in a transaction
+ * and returns the pointer to the object if found in a remote location */
+__attribute__((pure)) objheader_t *transRead2(unsigned int oid) {
+//DEBUG: __attribute__((pure)) objheader_t *transRead2(unsigned int oid, char tmpptr[]) {
+ unsigned int machinenumber;
+ objheader_t *tmp, *objheader;
+ objheader_t *objcopy;
+ int size;
+
+#ifdef ABORTREADERS
+ if (t_abort) {
+ //abort this transaction
+ removetransactionhash();
+ objstrDelete(t_cache);
+ t_chashDelete();
+ _longjmp(aborttrans,1);
+ } else
+ addtransaction(oid);
+#endif
+
+ if ((objheader = (objheader_t *) mhashSearch(oid)) != NULL) {
+#ifdef TRANSSTATS
+ nmhashSearch++;
+#endif
+ /* Look up in machine lookup table and copy into cache*/
+ GETSIZE(size, objheader);
+ size += sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(&t_cache, size);
+ memcpy(objcopy, objheader, size);
+ /* Insert into cache's lookup table */
+ STATUS(objcopy)=0;
+ t_chashInsert(OID(objheader), objcopy);
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ } else {
+#ifdef CACHE
+ if((tmp = (objheader_t *) prehashSearch(oid)) != NULL) {
+ if(STATUS(tmp) & DIRTY) {
+#ifdef TRANSSTATS
+ ndirtyCacheObj++;
+#endif
+ goto remoteread;
+ }
+#ifdef TRANSSTATS
+ LOGEVENT('P')
+ nprehashSearch++;
+#endif
+ /* Look up in prefetch cache */
+ GETSIZE(size, tmp);
+ size+=sizeof(objheader_t);
+ objcopy = (objheader_t *) objstrAlloc(&t_cache, size);
+ memcpy(objcopy, tmp, size);
+ LOGOIDTYPE("P",oid, TYPE(objcopy), myrdtsc());
+ /* Insert into cache's lookup table */
+ t_chashInsert(OID(tmp), objcopy);
+#ifdef COMPILER
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ }
+remoteread:
+#endif
+ /* Get the object from the remote location */
+ if((machinenumber = lhashSearch(oid)) == 0) {
+ printf("Error: %s() No machine found for oid =% %s,%dx\n",__func__, machinenumber, __FILE__, __LINE__);
+ return NULL;
+ }
+ objcopy = getRemoteObj(machinenumber, oid);
+#ifdef TRANSSTATS
+ LOGEVENT('R');
+ nRemoteSend++;
+#endif
+
+ if(objcopy == NULL) {
+ printf("Error: Object %u not found in Remote location %s, %d\n", oid,__FILE__, __LINE__);
+ return NULL;
+ } else {
+#ifdef COMPILER
+#ifdef CACHE
+ LOGOIDTYPE("RR",oid, TYPE(objcopy),myrdtsc());
+ LOGTIME('r', oid, TYPE(objcopy),myrdtsc(),0);
+ //Copy object to prefetch cache
+ pthread_mutex_lock(&prefetchcache_mutex);
+ objheader_t *headerObj;
+ int size;
+ GETSIZE(size, objcopy);
+ if((headerObj = prefetchobjstrAlloc(size+sizeof(objheader_t))) == NULL) {
+ printf("%s(): Error in getting memory from prefetch cache at %s, %d\n", __func__,
+ __FILE__, __LINE__);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ return NULL;
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ memcpy(headerObj, objcopy, size+sizeof(objheader_t));
+ //make an entry in prefetch lookup hashtable
+ prehashInsert(oid, headerObj);
+ LOGEVENT('B');
+#endif
+ return &objcopy[1];
+#else
+ return objcopy;
+#endif
+ }
+ }
}
/* This function creates objects in the transaction record */
-objheader_t *transCreateObj(transrecord_t *record, unsigned int size)
-{
- objheader_t *tmp = (objheader_t *) objstrAlloc(record->cache, (sizeof(objheader_t) + size));
+objheader_t *transCreateObj(unsigned int size) {
+ objheader_t *tmp = (objheader_t *) objstrAlloc(&t_cache, (sizeof(objheader_t) + size));
OID(tmp) = getNewOID();
tmp->version = 1;
tmp->rcount = 1;
STATUS(tmp) = NEW;
- chashInsert(record->lookupTable, OID(tmp), tmp);
+ t_chashInsert(OID(tmp), tmp);
+#ifdef SANDBOX
+ trans_allocation_bytes += size;
+ /* Validate the read set if allocation is exceeds threshold */
+ if(trans_allocation_bytes > MEM_ALLOC_THRESHOLD) {
+ check_mem_alloc();
+ }
+#endif
+
#ifdef COMPILER
return &tmp[1]; //want space after object header
#else
#endif
}
+#if 1
/* This function creates machine piles based on all machines involved in a
* transaction commit request */
-plistnode_t *createPiles(transrecord_t *record) {
- int i = 0;
- unsigned int size;/* Represents number of bins in the chash table */
- chashlistnode_t *curr, *ptr, *next;
- plistnode_t *pile = NULL;
- unsigned int machinenum;
- void *localmachinenum;
- objheader_t *headeraddr;
-
- ptr = record->lookupTable->table;
- size = record->lookupTable->size;
-
- for(i = 0; i < size ; i++) {
- curr = &ptr[i];
- /* Inner loop to traverse the linked list of the cache lookupTable */
- while(curr != NULL) {
- //if the first bin in hash table is empty
- if(curr->key == 0) {
- break;
- }
- next = curr->next;
-
- if ((headeraddr = chashSearch(record->lookupTable, curr->key)) == NULL) {
- printf("Error: No such oid %s, %d\n", __FILE__, __LINE__);
- return NULL;
- }
-
- //Get machine location for object id (and whether local or not)
- if (STATUS(headeraddr) & NEW || mhashSearch(curr->key) != NULL) {
- machinenum = myIpAddr;
- } else if ((machinenum = lhashSearch(curr->key)) == 0) {
- printf("Error: No such machine %s, %d\n", __FILE__, __LINE__);
- return NULL;
- }
-
- //Make machine groups
- if ((pile = pInsert(pile, headeraddr, machinenum, record->lookupTable->numelements)) == NULL) {
- printf("pInsert error %s, %d\n", __FILE__, __LINE__);
- return NULL;
- }
-
- curr = next;
- }
- }
- return pile;
+plistnode_t *createPiles() {
+ int i;
+ plistnode_t *pile = NULL;
+ unsigned int machinenum;
+ objheader_t *headeraddr;
+ chashlistnode_t * ptr = c_table;
+ /* Represents number of bins in the chash table */
+ unsigned int size = c_size;
+
+ for(i = 0; i < size ; i++) {
+ chashlistnode_t * curr = &ptr[i];
+ /* Inner loop to traverse the linked list of the cache lookupTable */
+ while(curr != NULL) {
+ //if the first bin in hash table is empty
+ if(curr->key == 0)
+ break;
+ headeraddr=(objheader_t *) curr->val;
+
+ //Get machine location for object id (and whether local or not)
+ if (STATUS(headeraddr) & NEW || (mhashSearch(curr->key) != NULL)) {
+ machinenum = myIpAddr;
+ } else if ((machinenum = lhashSearch(curr->key)) == 0) {
+ printf("Error: No such machine %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
+
+ //Make machine groups
+ pile = pInsert(pile, headeraddr, machinenum, c_numelements);
+ curr = curr->next;
+ }
+ }
+ return pile;
}
+#else
+/* This function creates machine piles based on all machines involved in a
+ * transaction commit request */
+plistnode_t *createPiles() {
+ int i;
+ plistnode_t *pile = NULL;
+ unsigned int machinenum;
+ objheader_t *headeraddr;
+ struct chashentry * ptr = c_table;
+ /* Represents number of bins in the chash table */
+ unsigned int size = c_size;
+
+ for(i = 0; i < size ; i++) {
+ struct chashentry * curr = & ptr[i];
+ /* Inner loop to traverse the linked list of the cache lookupTable */
+ //if the first bin in hash table is empty
+ if(curr->key == 0)
+ continue;
+ headeraddr=(objheader_t *) curr->ptr;
+
+ //Get machine location for object id (and whether local or not)
+ if (STATUS(headeraddr) & NEW || (mhashSearch(curr->key) != NULL)) {
+ machinenum = myIpAddr;
+ } else if ((machinenum = lhashSearch(curr->key)) == 0) {
+ printf("Error: No such machine %s, %d\n", __FILE__, __LINE__);
+ return NULL;
+ }
+
+ //Make machine groups
+ pile = pInsert(pile, headeraddr, machinenum, c_numelements);
+ }
+ return pile;
+}
+#endif
/* This function initiates the transaction commit process
- * Spawns threads for each of the new connections with Participants
- * and creates new piles by calling the createPiles(),
- * Sends a transrequest() to each remote machines for objects found remotely
+ * Spawns threads for each of the new connections with Participants
+ * and creates new piles by calling the createPiles(),
+ * Sends a transrequest() to each remote machines for objects found remotely
* and calls handleLocalReq() to process objects found locally */
-int transCommit(transrecord_t *record) {
- unsigned int tot_bytes_mod, *listmid;
- plistnode_t *pile, *pile_ptr;
- int i, j, rc, val;
- int pilecount, offset, threadnum, trecvcount;
- char buffer[RECEIVE_BUFFER_SIZE],control;
- char transid[TID_LEN];
- trans_req_data_t *tosend;
- trans_commit_data_t transinfo;
- static int newtid = 0;
- char treplyctrl = 0, treplyretry = 0; /* keeps track of the common response that needs to be sent */
- char localstat = 0;
-
- do {
- trecvcount = 0;
- threadnum = 0;
-
- /* Look through all the objects in the transaction record and make piles
- * for each machine involved in the transaction*/
- pile_ptr = pile = createPiles(record);
-
- /* Create the packet to be sent in TRANS_REQUEST */
-
- /* Count the number of participants */
- pilecount = pCount(pile);
-
- /* Create a list of machine ids(Participants) involved in transaction */
- if((listmid = calloc(pilecount, sizeof(unsigned int))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- free(record);
- return 1;
- }
- pListMid(pile, listmid);
-
-
- /* Initialize thread variables,
- * Spawn a thread for each Participant involved in a transaction */
- pthread_t thread[pilecount];
- pthread_attr_t attr;
- pthread_cond_t tcond;
- pthread_mutex_t tlock;
- pthread_mutex_t tlshrd;
-
- thread_data_array_t *thread_data_array;
- if((thread_data_array = (thread_data_array_t *) malloc(sizeof(thread_data_array_t)*pilecount)) == NULL) {
- printf("Malloc error %s, %d\n", __FILE__, __LINE__);
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- pDelete(pile_ptr);
- free(listmid);
- free(record);
- return 1;
- }
-
- local_thread_data_array_t *ltdata;
- if((ltdata = calloc(1, sizeof(local_thread_data_array_t))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- pDelete(pile_ptr);
- free(listmid);
- free(thread_data_array);
- free(record);
- return 1;
- }
-
- thread_response_t rcvd_control_msg[pilecount]; /* Shared thread array that keeps track of responses of participants */
-
- /* Initialize and set thread detach attribute */
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
- pthread_mutex_init(&tlock, NULL);
- pthread_cond_init(&tcond, NULL);
-
- /* Process each machine pile */
- while(pile != NULL) {
- //Create transaction id
- newtid++;
- if ((tosend = calloc(1, sizeof(trans_req_data_t))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- pDelete(pile_ptr);
- free(listmid);
- free(thread_data_array);
- free(ltdata);
- free(record);
- return 1;
- }
- tosend->f.control = TRANS_REQUEST;
- sprintf(tosend->f.trans_id, "%x_%d", pile->mid, newtid);
- tosend->f.mcount = pilecount;
- tosend->f.numread = pile->numread;
- tosend->f.nummod = pile->nummod;
- tosend->f.numcreated = pile->numcreated;
- tosend->f.sum_bytes = pile->sum_bytes;
- tosend->listmid = listmid;
- tosend->objread = pile->objread;
- tosend->oidmod = pile->oidmod;
- tosend->oidcreated = pile->oidcreated;
- thread_data_array[threadnum].thread_id = threadnum;
- thread_data_array[threadnum].mid = pile->mid;
- thread_data_array[threadnum].buffer = tosend;
- thread_data_array[threadnum].recvmsg = rcvd_control_msg;
- thread_data_array[threadnum].threshold = &tcond;
- thread_data_array[threadnum].lock = &tlock;
- thread_data_array[threadnum].count = &trecvcount;
- thread_data_array[threadnum].replyctrl = &treplyctrl;
- thread_data_array[threadnum].replyretry = &treplyretry;
- thread_data_array[threadnum].rec = record;
- /* If local do not create any extra connection */
- if(pile->mid != myIpAddr) { /* Not local */
- do {
- rc = pthread_create(&thread[threadnum], &attr, transRequest, (void *) &thread_data_array[threadnum]);
- } while(rc!=0);
- if(rc) {
- perror("Error in pthread create\n");
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- pDelete(pile_ptr);
- free(listmid);
- for (i = 0; i < threadnum; i++)
- free(thread_data_array[i].buffer);
- free(thread_data_array);
- free(ltdata);
- free(record);
- return 1;
- }
- } else { /*Local*/
- ltdata->tdata = &thread_data_array[threadnum];
- ltdata->transinfo = &transinfo;
- do {
- val = pthread_create(&thread[threadnum], &attr, handleLocalReq, (void *) ltdata);
- } while(val!=0);
- if(val) {
- perror("Error in pthread create\n");
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- pDelete(pile_ptr);
- free(listmid);
- for (i = 0; i < threadnum; i++)
- free(thread_data_array[i].buffer);
- free(thread_data_array);
- free(ltdata);
- free(record);
- return 1;
- }
- }
-
- threadnum++;
- pile = pile->next;
- }
-
- /* Free attribute and wait for the other threads */
- pthread_attr_destroy(&attr);
-
- for (i = 0; i < pilecount; i++) {
- rc = pthread_join(thread[i], NULL);
- if(rc)
- {
- printf("ERROR return code from pthread_join() is %d\n", rc);
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- pDelete(pile_ptr);
- free(listmid);
- for (j = i; j < pilecount; j++)
- free(thread_data_array[j].buffer);
- free(thread_data_array);
- free(ltdata);
- free(record);
- return 1;
- }
- free(thread_data_array[i].buffer);
- }
-
-
- /* Free resources */
- pthread_cond_destroy(&tcond);
- pthread_mutex_destroy(&tlock);
- free(listmid);
- pDelete(pile_ptr);
- free(thread_data_array);
- free(ltdata);
-
- /* wait a random amount of time */
- if (treplyretry == 1) {
- randomdelay();
- }
-
- /* Retry trans commit procedure if not sucessful in the first try */
- } while (treplyretry == 1);
-
- /* Free Resources */
- objstrDelete(record->cache);
- chashDelete(record->lookupTable);
- free(record);
- return 0;
-}
+int transCommit() {
+ //char buffer[30];
+ unsigned int tot_bytes_mod, *listmid;
+ plistnode_t *pile, *pile_ptr;
+ char treplyretry; /* keeps track of the common response that needs to be sent */
+ int firsttime=1;
+ trans_commit_data_t transinfo; /* keeps track of objs locked during transaction */
+ char finalResponse;
+#ifdef SANDBOX
+ abortenabled=0;
+#endif
+ struct writestruct writebuffer;
+ writebuffer.offset=0;
-/* This function sends information involved in the transaction request
- * to participants and accepts a response from particpants.
- * It calls decideresponse() to decide on what control message
- * to send next to participants and sends the message using sendResponse()*/
-void *transRequest(void *threadarg) {
- int sd, i, n;
- struct sockaddr_in serv_addr;
- struct hostent *server;
- thread_data_array_t *tdata;
- objheader_t *headeraddr;
- char buffer[RECEIVE_BUFFER_SIZE], control, recvcontrol;
- char machineip[16], retval;
-
- tdata = (thread_data_array_t *) threadarg;
-
- /* Send Trans Request */
- if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- perror("Error in socket for TRANS_REQUEST\n");
- pthread_exit(NULL);
- }
- bzero((char*) &serv_addr, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(LISTEN_PORT);
- midtoIP(tdata->mid,machineip);
- machineip[15] = '\0';
- serv_addr.sin_addr.s_addr = inet_addr(machineip);
- /* Open Connection */
- if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect for TRANS_REQUEST\n");
- close(sd);
- pthread_exit(NULL);
- }
+#ifdef LOGEVENTS
+ int iii;
+ for(iii=0;iii<bigindex;iii++) {
+ printf("%c", bigarray[iii]);
+ }
+#endif
- /* Send bytes of data with TRANS_REQUEST control message */
- if (send(sd, &(tdata->buffer->f), sizeof(fixed_data_t),MSG_NOSIGNAL) < sizeof(fixed_data_t)) {
- perror("Error sending fixed bytes for thread\n");
- close(sd);
- pthread_exit(NULL);
+#ifdef LOGTIMES
+ int jjj;
+ for(jjj=0; jjj<bigindex1; jjj++) {
+ printf("[%c %u %u %lld %d]\n", bigarray1[jjj], bigarray2[jjj], bigarray3[jjj], bigarray4[jjj], bigarray5[jjj]);
+ }
+#endif
+
+#ifdef ABORTREADERS
+ if (t_abort) {
+ //abort this transaction
+ removetransactionhash();
+ objstrDelete(t_cache);
+ t_chashDelete();
+ return 1;
+ }
+#endif
+
+
+ int treplyretryCount = 0;
+ /* Initialize timeout for exponential delay */
+ exponential_backoff.tv_sec = 0;
+ exponential_backoff.tv_nsec = (long)(10000);//10 microsec
+ count_exponential_backoff = 0;
+ do {
+ treplyretry = 0;
+
+ /* Look through all the objects in the transaction record and make piles
+ * for each machine involved in the transaction*/
+ if (firsttime) {
+ pile_ptr = pile = createPiles();
+ pile_ptr = pile = sortPiles(pile);
+ } else {
+ pile = pile_ptr;
+ }
+ firsttime = 0;
+ /* Create the packet to be sent in TRANS_REQUEST */
+
+ /* Count the number of participants */
+ int pilecount;
+ pilecount = pCount(pile);
+
+ /* Create a list of machine ids(Participants) involved in transaction */
+ listmid = calloc(pilecount, sizeof(unsigned int));
+ pListMid(pile, listmid);
+
+ /* Create a socket and getReplyCtrl array, initialize */
+ int socklist[pilecount];
+ char getReplyCtrl[pilecount];
+ int loopcount;
+ for(loopcount = 0 ; loopcount < pilecount; loopcount++){
+ socklist[loopcount] = 0;
+ getReplyCtrl[loopcount] = 0;
+ }
+
+ /* Process each machine pile */
+ int sockindex = 0;
+ trans_req_data_t *tosend;
+ tosend = calloc(pilecount, sizeof(trans_req_data_t));
+ while(pile != NULL) {
+ tosend[sockindex].f.control = TRANS_REQUEST;
+ tosend[sockindex].f.mcount = pilecount;
+ tosend[sockindex].f.numread = pile->numread;
+ tosend[sockindex].f.nummod = pile->nummod;
+ tosend[sockindex].f.numcreated = pile->numcreated;
+ tosend[sockindex].f.sum_bytes = pile->sum_bytes;
+ tosend[sockindex].listmid = listmid;
+ tosend[sockindex].objread = pile->objread;
+ tosend[sockindex].oidmod = pile->oidmod;
+ tosend[sockindex].oidcreated = pile->oidcreated;
+ int sd = 0;
+ if(pile->mid != myIpAddr) {
+ if((sd = getSock2WithLock(transRequestSockPool, pile->mid)) < 0) {
+ printf("transRequest(): socket create error\n");
+ free(listmid);
+ free(tosend);
+ return 1;
}
+ socklist[sockindex] = sd;
+ /* Send bytes of data with TRANS_REQUEST control message */
+ send_buf(sd, &writebuffer, &(tosend[sockindex].f), sizeof(fixed_data_t));
+
/* Send list of machines involved in the transaction */
{
- int size=sizeof(unsigned int)*tdata->buffer->f.mcount;
- if (send(sd, tdata->buffer->listmid, size, MSG_NOSIGNAL) < size) {
- perror("Error sending list of machines for thread\n");
- close(sd);
- pthread_exit(NULL);
- }
+ int size=sizeof(unsigned int)*(tosend[sockindex].f.mcount);
+ send_buf(sd, &writebuffer, tosend[sockindex].listmid, size);
}
+
/* Send oids and version number tuples for objects that are read */
{
- int size=(sizeof(unsigned int)+sizeof(short))*tdata->buffer->f.numread;
- if (send(sd, tdata->buffer->objread, size, MSG_NOSIGNAL) < size) {
- perror("Error sending tuples for thread\n");
- close(sd);
- pthread_exit(NULL);
- }
+ int size=(sizeof(unsigned int)+sizeof(unsigned short))*(tosend[sockindex].f.numread);
+ send_buf(sd, &writebuffer, tosend[sockindex].objread, size);
}
+
/* Send objects that are modified */
- for(i = 0; i < tdata->buffer->f.nummod ; i++) {
- int size;
- headeraddr = chashSearch(tdata->rec->lookupTable, tdata->buffer->oidmod[i]);
- GETSIZE(size,headeraddr);
- size+=sizeof(objheader_t);
- if (send(sd, headeraddr, size, MSG_NOSIGNAL) < size) {
- perror("Error sending obj modified for thread\n");
- close(sd);
- pthread_exit(NULL);
- }
+ void *modptr;
+ if((modptr = calloc(1, tosend[sockindex].f.sum_bytes)) == NULL) {
+ printf("Calloc error for modified objects %s, %d\n", __FILE__, __LINE__);
+ free(listmid);
+ free(tosend);
+ return 1;
}
-
- /* Read control message from Participant */
- if((n = read(sd, &control, sizeof(char))) <= 0) {
- perror("Error in reading control message from Participant\n");
- close(sd);
- pthread_exit(NULL);
+ int offset = 0;
+ int i;
+ for(i = 0; i < tosend[sockindex].f.nummod ; i++) {
+ int size;
+ objheader_t *headeraddr;
+ if((headeraddr = t_chashSearch(tosend[sockindex].oidmod[i])) == NULL) {
+ printf("%s() Error: No such oid %s, %d\n", __func__, __FILE__, __LINE__);
+ free(modptr);
+ free(listmid);
+ free(tosend);
+ return 1;
+ }
+ GETSIZE(size,headeraddr);
+ size+=sizeof(objheader_t);
+ memcpy(modptr+offset, headeraddr, size);
+ offset+=size;
}
- recvcontrol = control;
-
- /* Update common data structure and increment count */
- tdata->recvmsg[tdata->thread_id].rcv_status = recvcontrol;
+ forcesend_buf(sd, &writebuffer, modptr, tosend[sockindex].f.sum_bytes);
+ free(modptr);
+ } else { //handle request locally
+ handleLocalReq(&tosend[sockindex], &transinfo, &getReplyCtrl[sockindex]);
+ }
+ sockindex++;
+ pile = pile->next;
+ } //end of pile processing
+
+ /* Recv Ctrl msgs from all machines */
+ int i;
+ for(i = 0; i < pilecount; i++) {
+ int sd = socklist[i];
+ if(sd != 0) {
+ char control;
+ recv_data(sd, &control, sizeof(char));
+ //Update common data structure with new ctrl msg
+ getReplyCtrl[i] = control;
+ /* Recv Objects if participant sends TRANS_DISAGREE */
+#ifdef CACHE
+ if(control == TRANS_DISAGREE) {
+ int length;
+ recv_data(sd, &length, sizeof(int));
+ void *newAddr;
+ pthread_mutex_lock(&prefetchcache_mutex);
+ if ((newAddr = prefetchobjstrAlloc((unsigned int)length)) == NULL) {
+ printf("Error: %s() objstrAlloc error for copying into prefetch cache %s, %d\n", __func__, __FILE__, __LINE__);
+ free(tosend);
+ free(listmid);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ return 1;
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ recv_data(sd, newAddr, length);
+ int offset = 0;
+ while(length != 0) {
+ unsigned int oidToPrefetch;
+ objheader_t * header;
+ header = (objheader_t *)(((char *)newAddr) + offset);
+ oidToPrefetch = OID(header);
+ STATUS(header)=0;
+ int size = 0;
+ GETSIZE(size, header);
+ size += sizeof(objheader_t);
+ //make an entry in prefetch hash table
+ prehashInsert(oidToPrefetch, header);
+ LOGEVENT('E');
+ length = length - size;
+ offset += size;
+ }
+ } //end of receiving objs
+#endif
+ }
+ }
+
+ /* Decide the final response */
+ if((finalResponse = decideResponse(getReplyCtrl, &treplyretry, pilecount)) == 0) {
+ printf("Error: %s() in updating prefetch cache %s, %d\n", __func__, __FILE__, __LINE__);
+ free(tosend);
+ free(listmid);
+ return 1;
+ }
+
+#ifdef CACHE
+ if (finalResponse == TRANS_COMMIT) {
+ /* Invalidate objects in other machine cache */
+ int retval;
+ if((retval = invalidateObj(tosend, pilecount,finalResponse,socklist)) != 0) {
+ printf("Error: %s() in invalidating Objects %s, %d\n", __func__, __FILE__, __LINE__);
+ free(tosend);
+ free(listmid);
+ return 1;
+ }
+ }
+#endif
+ /* Send responses to all machines */
+ for(i = 0; i < pilecount; i++) {
+ int sd = socklist[i];
+ if(sd != 0) {
+#ifdef CACHE
+ if(finalResponse == TRANS_COMMIT) {
+ int retval;
+ /* Update prefetch cache */
+ if((retval = updatePrefetchCache(&(tosend[i]))) != 0) {
+ printf("Error: %s() in updating prefetch cache %s, %d\n", __func__, __FILE__, __LINE__);
+ free(tosend);
+ free(listmid);
+ return 1;
+ }
+#ifdef ABORTREADERS
+ removetransaction(tosend[i].oidmod,tosend[i].f.nummod);
+ removethisreadtransaction(tosend[i].objread, tosend[i].f.numread);
+#endif
+ }
+#ifdef ABORTREADERS
+ else if (!treplyretry) {
+ removethistransaction(tosend[i].oidmod,tosend[i].f.nummod);
+ removethisreadtransaction(tosend[i].objread,tosend[i].f.numread);
+ }
+#endif
+#endif
+ send_data(sd, &finalResponse, sizeof(char));
+ } else {
+ /* Complete local processing */
+ doLocalProcess(finalResponse, &(tosend[i]), &transinfo);
+#ifdef ABORTREADERS
+ if(finalResponse == TRANS_COMMIT) {
+ removetransaction(tosend[i].oidmod,tosend[i].f.nummod);
+ removethisreadtransaction(tosend[i].objread,tosend[i].f.numread);
+ } else if (!treplyretry) {
+ removethistransaction(tosend[i].oidmod,tosend[i].f.nummod);
+ removethisreadtransaction(tosend[i].objread,tosend[i].f.numread);
+ }
+#endif
+ }
+ }
+
+ /* Free resources */
+ free(tosend);
+ free(listmid);
+ if (!treplyretry)
+ pDelete(pile_ptr);
+ /* wait a random amount of time before retrying to commit transaction*/
+ if(treplyretry) {
+ treplyretryCount++;
+ // if(treplyretryCount >= NUM_TRY_TO_COMMIT)
+ // exponentialdelay();
+ // else
+ randomdelay();
+#ifdef TRANSSTATS
+ nSoftAbort++;
+#endif
+ }
+ /* Retry trans commit procedure during soft_abort case */
+ } while (treplyretry);
+
+ if(finalResponse == TRANS_ABORT) {
+#ifdef TRANSSTATS
+ LOGEVENT('A');
+ numTransAbort++;
+#endif
+ /* Free Resources */
+ objstrDelete(t_cache);
+ t_chashDelete();
+#ifdef SANDBOX
+ abortenabled=1;
+#endif
+ return TRANS_ABORT;
+ } else if(finalResponse == TRANS_COMMIT) {
+#ifdef TRANSSTATS
+ LOGEVENT('C');
+ numTransCommit++;
+#endif
+ /* Free Resources */
+ objstrDelete(t_cache);
+ t_chashDelete();
+ return 0;
+ } else {
+ //TODO Add other cases
+ printf("Error: in %s() THIS SHOULD NOT HAPPEN.....EXIT PROGRAM\n", __func__);
+ exit(-1);
+ }
+ return 0;
+}
- /* Lock and update count */
- /* Thread sleeps until all messages from pariticipants are received by coordinator */
- pthread_mutex_lock(tdata->lock);
+/* This function handles the local objects involved in a transaction
+ * commiting process. It also makes a decision if this local machine
+ * sends AGREE or DISAGREE or SOFT_ABORT to coordinator */
+void handleLocalReq(trans_req_data_t *tdata, trans_commit_data_t *transinfo, char *getReplyCtrl) {
+ unsigned int *oidnotfound = NULL, *oidlocked = NULL;
+ int numoidnotfound = 0, numoidlocked = 0;
+ int v_nomatch = 0, v_matchlock = 0, v_matchnolock = 0;
+ int numread, i;
+ unsigned int oid;
+ unsigned short version;
+
+ /* Counters and arrays to formulate decision on control message to be sent */
+ oidnotfound = (unsigned int *) calloc((tdata->f.numread + tdata->f.nummod), sizeof(unsigned int));
+ oidlocked = (unsigned int *) calloc((tdata->f.numread + tdata->f.nummod +1), sizeof(unsigned int)); // calloc additional 1 byte for
+ //setting a divider between read and write locks
+ numread = tdata->f.numread;
+ /* Process each oid in the machine pile/ group per thread */
+ for (i = 0; i < tdata->f.numread + tdata->f.nummod; i++) {
+ if (i < tdata->f.numread) {
+ int incr = sizeof(unsigned int) + sizeof(unsigned short); // Offset that points to next position in the objread array
+ incr *= i;
+ oid = *((unsigned int *)(((char *)tdata->objread) + incr));
+ version = *((unsigned short *)(((char *)tdata->objread) + incr + sizeof(unsigned int)));
+ commitCountForObjRead(getReplyCtrl, oidnotfound, oidlocked, &numoidnotfound, &numoidlocked, &v_nomatch, &v_matchlock, &v_matchnolock, oid, version);
+ } else { // Objects Modified
+ if(i == tdata->f.numread) {
+ oidlocked[numoidlocked++] = -1;
+ }
+ int tmpsize;
+ objheader_t *headptr;
+ headptr = (objheader_t *) t_chashSearch(tdata->oidmod[i-numread]);
+ if (headptr == NULL) {
+ printf("Error: handleLocalReq() returning NULL, no such oid %s, %d\n", __FILE__, __LINE__);
+ return;
+ }
+ oid = OID(headptr);
+ version = headptr->version;
+ commitCountForObjMod(getReplyCtrl, oidnotfound, oidlocked, &numoidnotfound, &numoidlocked, &v_nomatch, &v_matchlock, &v_matchnolock, oid, version);
+ }
+ }
- (*(tdata->count))++; /* keeps track of no of messages received by the coordinator */
+/* Fill out the trans_commit_data_t data structure. This is required for a trans commit process
+ * if Participant receives a TRANS_COMMIT */
+ transinfo->objlocked = oidlocked;
+ transinfo->objnotfound = oidnotfound;
+ transinfo->modptr = NULL;
+ transinfo->numlocked = numoidlocked;
+ transinfo->numnotfound = numoidnotfound;
+
+ /* Condition to send TRANS_AGREE */
+ if(v_matchnolock == tdata->f.numread + tdata->f.nummod) {
+ *getReplyCtrl = TRANS_AGREE;
+ }
+ /* Condition to send TRANS_SOFT_ABORT */
+ if((v_matchlock > 0 && v_nomatch == 0) || (numoidnotfound > 0 && v_nomatch == 0)) {
+ *getReplyCtrl = TRANS_SOFT_ABORT;
+ }
+}
- /* Wake up the threads and invoke decideResponse (once) */
- if(*(tdata->count) == tdata->buffer->f.mcount) {
- decideResponse(tdata);
- pthread_cond_broadcast(tdata->threshold);
- } else {
- pthread_cond_wait(tdata->threshold, tdata->lock);
- }
- pthread_mutex_unlock(tdata->lock);
-
- /* Send the final response such as TRANS_COMMIT or TRANS_ABORT t
- * to all participants in their respective socket */
- if (sendResponse(tdata, sd) == 0) {
- printf("sendResponse returned error %s,%d\n", __FILE__, __LINE__);
- close(sd);
- pthread_exit(NULL);
- }
+void doLocalProcess(char finalResponse, trans_req_data_t *tdata, trans_commit_data_t *transinfo) {
+ if(finalResponse == TRANS_ABORT) {
+ if(transAbortProcess(transinfo) != 0) {
+ printf("Error in transAbortProcess() %s,%d\n", __FILE__, __LINE__);
+ fflush(stdout);
+ return;
+ }
+ } else if(finalResponse == TRANS_COMMIT) {
+ if(transComProcess(tdata, transinfo) != 0) {
+ printf("Error in transComProcess() %s,%d\n", __FILE__, __LINE__);
+ fflush(stdout);
+ return;
+ }
+ } else {
+ printf("ERROR...No Decision\n");
+ }
- /* Close connection */
- close(sd);
- pthread_exit(NULL);
+ /* Free memory */
+ if (transinfo->objlocked != NULL) {
+ free(transinfo->objlocked);
+ }
+ if (transinfo->objnotfound != NULL) {
+ free(transinfo->objnotfound);
+ }
}
-/* This function decides the reponse that needs to be sent to
+/* This function decides the reponse that needs to be sent to
* all Participant machines after the TRANS_REQUEST protocol */
-void decideResponse(thread_data_array_t *tdata) {
- char control;
- int i, transagree = 0, transdisagree = 0, transsoftabort = 0; /* Counters to formulate decision of what
- message to send */
-
- for (i = 0 ; i < tdata->buffer->f.mcount; i++) {
- control = tdata->recvmsg[i].rcv_status; /* tdata: keeps track of all participant responses
- written onto the shared array */
- switch(control) {
- default:
- printf("Participant sent unknown message in %s, %d\n", __FILE__, __LINE__);
- /* treat as disagree, pass thru */
- case TRANS_DISAGREE:
- transdisagree++;
- break;
-
- case TRANS_AGREE:
- transagree++;
- break;
-
- case TRANS_SOFT_ABORT:
- transsoftabort++;
- break;
- }
- }
-
- if(transdisagree > 0) {
- /* Send Abort */
- *(tdata->replyctrl) = TRANS_ABORT;
- *(tdata->replyretry) = 0;
- /* clear objects from prefetch cache */
- for (i = 0; i < tdata->buffer->f.numread; i++)
- prehashRemove(*(unsigned int *)(tdata->buffer->objread + (sizeof(unsigned int) + sizeof(unsigned short))*i));
- for (i = 0; i < tdata->buffer->f.nummod; i++)
- prehashRemove(tdata->buffer->oidmod[i]);
- } else if(transagree == tdata->buffer->f.mcount){
- /* Send Commit */
- *(tdata->replyctrl) = TRANS_COMMIT;
- *(tdata->replyretry) = 0;
- } else {
- /* Send Abort in soft abort case followed by retry commiting transaction again*/
- *(tdata->replyctrl) = TRANS_ABORT;
- *(tdata->replyretry) = 1;
- }
+char decideResponse(char *getReplyCtrl, char *treplyretry, int pilecount) {
+ int i, transagree = 0, transdisagree = 0, transsoftabort = 0; /* Counters to formulate decision of what
+ message to send */
+ for (i = 0 ; i < pilecount; i++) {
+ char control;
+ control = getReplyCtrl[i];
+ switch(control) {
+ default:
+ printf("Participant sent unknown message %d in %s, %d\n", control, __FILE__, __LINE__);
+
+ /* treat as disagree, pass thru */
+ case TRANS_DISAGREE:
+ transdisagree++;
+ break;
+
+ case TRANS_AGREE:
+ transagree++;
+ break;
+
+ case TRANS_SOFT_ABORT:
+ transsoftabort++;
+ break;
+ }
+ }
- return;
+ if(transdisagree > 0) {
+ /* Send Abort */
+ *treplyretry = 0;
+ return TRANS_ABORT;
+#ifdef CACHE
+ /* clear objects from prefetch cache */
+ //cleanPCache();
+#endif
+ } else if(transagree == pilecount) {
+ /* Send Commit */
+ *treplyretry = 0;
+ return TRANS_COMMIT;
+ } else {
+ /* Send Abort in soft abort case followed by retry commiting transaction again*/
+ *treplyretry = 1;
+ return TRANS_ABORT;
+ }
+ return 0;
}
-/* This function sends the final response to remote machines per thread in their respective socket id
- * It returns a char that is only needed to check the correctness of execution of this function inside
- * transRequest()*/
-char sendResponse(thread_data_array_t *tdata, int sd) {
- int n, N, sum, oidcount = 0;
- char *ptr, retval = 0;
- unsigned int *oidnotfound;
-
- /* If the decided response is due to a soft abort and missing objects at the Participant's side */
- if(tdata->recvmsg[tdata->thread_id].rcv_status == TRANS_SOFT_ABORT) {
- /* Read list of objects missing */
- if((read(sd, &oidcount, sizeof(int)) != 0) && (oidcount != 0)) {
- N = oidcount * sizeof(unsigned int);
- if((oidnotfound = calloc(oidcount, sizeof(unsigned int))) == NULL) {
- printf("Calloc error %s, %d\n", __FILE__, __LINE__);
- return 0;
- }
- ptr = (char *) oidnotfound;
- do {
- n = read(sd, ptr+sum, N-sum);
- sum += n;
- } while(sum < N && n !=0);
- }
- retval = TRANS_SOFT_ABORT;
- }
- /* If the decided response is TRANS_ABORT */
- if(*(tdata->replyctrl) == TRANS_ABORT) {
- retval = TRANS_ABORT;
- } else if(*(tdata->replyctrl) == TRANS_COMMIT) { /* If the decided response is TRANS_COMMIT */
- retval = TRANS_COMMIT;
- }
- if (send(sd, tdata->replyctrl, sizeof(char),MSG_NOSIGNAL) < sizeof(char)) {
- perror("Error sending ctrl message for participant\n");
- }
+/* This function opens a connection, places an object read request to
+ * the remote machine, reads the control message and object if
+ * available and copies the object and its header to the local
+ * cache. */
+
+void *getRemoteObj(unsigned int mnum, unsigned int oid) {
+ int size, val;
+ struct sockaddr_in serv_addr;
+ char machineip[16];
+ char control;
+ objheader_t *h;
+ void *objcopy = NULL;
+
+ int sd = getSock2(transReadSockPool, mnum);
+ char readrequest[sizeof(char)+sizeof(unsigned int)];
+ readrequest[0] = READ_REQUEST;
+ *((unsigned int *)(&readrequest[1])) = oid;
+ send_data(sd, readrequest, sizeof(readrequest));
+
+ /* Read response from the Participant */
+ recv_data(sd, &control, sizeof(char));
+
+ if (control==OBJECT_NOT_FOUND) {
+ objcopy = NULL;
+ } else {
+ /* Read object if found into local cache */
+ recv_data(sd, &size, sizeof(int));
+ objcopy = objstrAlloc(&t_cache, size);
+ recv_data(sd, objcopy, size);
+ STATUS(objcopy)=0;
+ /* Insert into cache's lookup table */
+ t_chashInsert(oid, objcopy);
+#ifdef TRANSSTATS
+ totalObjSize += size;
+#endif
+ }
- return retval;
+ return objcopy;
}
-/* This function opens a connection, places an object read request to the
- * remote machine, reads the control message and object if available and
- * copies the object and its header to the local cache.
- * TODO replace mnum and midtoIP() with MACHINE_IP address later */
+/* Commit info for objects modified */
+void commitCountForObjMod(char *getReplyCtrl, unsigned int *oidnotfound, unsigned int *oidlocked, int *numoidnotfound,
+ int *numoidlocked, int *v_nomatch, int *v_matchlock, int *v_matchnolock, unsigned int oid, unsigned short version) {
+ void *mobj;
+ /* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
+ /* Save the oids not found and number of oids not found for later use */
+ if ((mobj = mhashSearch(oid)) == NULL) { /* Obj not found */
+ /* Save the oids not found and number of oids not found for later use */
+ oidnotfound[*numoidnotfound] = oid;
+ (*numoidnotfound)++;
+ } else { /* If Obj found in machine (i.e. has not moved) */
+ /* Check if Obj is locked by any previous transaction */
+ if (write_trylock(STATUSPTR(mobj))) { // Can acquire write lock
+ if (version == ((objheader_t *)mobj)->version) { /* match versions */
+ (*v_matchnolock)++;
+ //Keep track of what is locked
+ oidlocked[(*numoidlocked)++] = OID(((objheader_t *)mobj));
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ /* Send TRANS_DISAGREE to Coordinator */
+ *getReplyCtrl = TRANS_DISAGREE;
+
+ //Keep track of what is locked
+ oidlocked[(*numoidlocked)++] = OID(((objheader_t *)mobj));
+ return;
+ }
+ } else { //A lock is acquired some place else
+ if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
+ (*v_matchlock)++;
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ /* Send TRANS_DISAGREE to Coordinator */
+ *getReplyCtrl = TRANS_DISAGREE;
+ return;
+ }
+ }
+ }
+}
-void *getRemoteObj(transrecord_t *record, unsigned int mnum, unsigned int oid) {
- int sd, size, val;
- struct sockaddr_in serv_addr;
- struct hostent *server;
- char control;
- char machineip[16];
- objheader_t *h;
- void *objcopy;
+/* Commit info for objects modified */
+void commitCountForObjRead(char *getReplyCtrl, unsigned int *oidnotfound, unsigned int *oidlocked, int *numoidnotfound,
+ int *numoidlocked, int *v_nomatch, int *v_matchlock, int *v_matchnolock, unsigned int oid, unsigned short version) {
+ void *mobj;
+ /* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
+ /* Save the oids not found and number of oids not found for later use */
+ if ((mobj = mhashSearch(oid)) == NULL) { /* Obj not found */
+ /* Save the oids not found and number of oids not found for later use */
+ oidnotfound[*numoidnotfound] = oid;
+ (*numoidnotfound)++;
+ } else { /* If Obj found in machine (i.e. has not moved) */
+ /* Check if Obj is locked by any previous transaction */
+ if (read_trylock(STATUSPTR(mobj))) { // Can further acquire read locks
+ if (version == ((objheader_t *)mobj)->version) { /* If locked then match versions */
+ (*v_matchnolock)++;
+ //Keep track of what is locked
+ oidlocked[(*numoidlocked)++] = OID(((objheader_t *)mobj));
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ /* Send TRANS_DISAGREE to Coordinator */
+ *getReplyCtrl = TRANS_DISAGREE;
+ //Keep track of what is locked
+ oidlocked[(*numoidlocked)++] = OID(((objheader_t *)mobj));
+ return;
+ }
+ } else { //Has reached max number of readers or some other transaction
+ //has acquired a lock on this object
+ if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
+ (*v_matchlock)++;
+ } else { /* If versions don't match ...HARD ABORT */
+ (*v_nomatch)++;
+ /* Send TRANS_DISAGREE to Coordinator */
+ *getReplyCtrl = TRANS_DISAGREE;
+ return;
+ }
+ }
+ }
+}
- if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- perror("Error in socket\n");
- return NULL;
- }
- bzero((char*) &serv_addr, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(LISTEN_PORT);
- //serv_addr.sin_addr.s_addr = inet_addr(MACHINE_IP);
- midtoIP(mnum,machineip);
- machineip[15] = '\0';
- serv_addr.sin_addr.s_addr = inet_addr(machineip);
- /* Open connection */
- if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect\n");
- return NULL;
- }
- char readrequest[sizeof(char)+sizeof(unsigned int)];
- readrequest[0] = READ_REQUEST;
- *((unsigned int *)(&readrequest[1])) = oid;
- if (send(sd, &readrequest, sizeof(readrequest), MSG_NOSIGNAL) < sizeof(readrequest)) {
- perror("Error sending message\n");
- return NULL;
- }
+/* This function completes the ABORT process if the transaction is aborting */
+int transAbortProcess(trans_commit_data_t *transinfo) {
+ int i, numlocked;
+ unsigned int *objlocked;
+ void *header;
+
+ numlocked = transinfo->numlocked;
+ objlocked = transinfo->objlocked;
+
+ int useWriteUnlock = 0;
+ for (i = 0; i < numlocked; i++) {
+ if(objlocked[i] == -1) {
+ useWriteUnlock = 1;
+ continue;
+ }
+ if((header = mhashSearch(objlocked[i])) == NULL) {
+ printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ if(!useWriteUnlock) {
+ read_unlock(STATUSPTR(header));
+ } else {
+ write_unlock(STATUSPTR(header));
+ }
+ }
- /* Read response from the Participant */
- if((val = read(sd, &control, sizeof(char))) <= 0) {
- perror("No control response for getRemoteObj sent\n");
- return NULL;
- }
- switch(control) {
- case OBJECT_NOT_FOUND:
- return NULL;
- case OBJECT_FOUND:
- /* Read object if found into local cache */
- if((val = read(sd, &size, sizeof(int))) <= 0) {
- perror("No size is read from the participant\n");
- return NULL;
- }
- objcopy = objstrAlloc(record->cache, size);
- if((val = read(sd, objcopy, size)) <= 0) {
- perror("No objects are read from the remote participant\n");
- return NULL;
- }
- /* Insert into cache's lookup table */
- chashInsert(record->lookupTable, oid, objcopy);
- break;
- default:
- printf("Error in recv request from participant on a READ_REQUEST %s, %d\n",__FILE__, __LINE__);
- return NULL;
- }
- /* Close connection */
- close(sd);
- return objcopy;
+ return 0;
}
-/* This function handles the local objects involved in a transaction commiting process.
- * It also makes a decision if this local machine sends AGREE or DISAGREE or SOFT_ABORT to coordinator.
- * Note Coordinator = local machine
- * It wakes up the other threads from remote participants that are waiting for the coordinator's decision and
- * based on common agreement it either commits or aborts the transaction.
- * It also frees the memory resources */
-void *handleLocalReq(void *threadarg) {
- unsigned int *oidnotfound = NULL, *oidlocked = NULL;
- local_thread_data_array_t *localtdata;
- int objnotfound = 0, objlocked = 0;
- int v_nomatch = 0, v_matchlock = 0, v_matchnolock = 0;
- int numread, i;
- unsigned int oid;
- unsigned short version;
- void *mobj;
- objheader_t *headptr;
-
- localtdata = (local_thread_data_array_t *) threadarg;
-
- /* Counters and arrays to formulate decision on control message to be sent */
- oidnotfound = (unsigned int *) calloc((localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod), sizeof(unsigned int));
- oidlocked = (unsigned int *) calloc((localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod), sizeof(unsigned int));
-
- numread = localtdata->tdata->buffer->f.numread;
- /* Process each oid in the machine pile/ group per thread */
- for (i = 0; i < localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod; i++) {
- if (i < localtdata->tdata->buffer->f.numread) {
- int incr = sizeof(unsigned int) + sizeof(short);// Offset that points to next position in the objread array
- incr *= i;
- oid = *((unsigned int *)(localtdata->tdata->buffer->objread + incr));
- version = *((short *)(localtdata->tdata->buffer->objread + incr + sizeof(unsigned int)));
- } else { // Objects Modified
- int tmpsize;
- headptr = (objheader_t *) chashSearch(localtdata->tdata->rec->lookupTable, localtdata->tdata->buffer->oidmod[i-numread]);
- if (headptr == NULL) {
- printf("Error: handleLocalReq() returning NULL\n");
- return NULL;
- }
- oid = OID(headptr);
- version = headptr->version;
- }
- /* Check if object is still present in the machine since the beginning of TRANS_REQUEST */
-
- /* Save the oids not found and number of oids not found for later use */
- if ((mobj = mhashSearch(oid)) == NULL) { /* Obj not found */
- /* Save the oids not found and number of oids not found for later use */
- oidnotfound[objnotfound] = oid;
- objnotfound++;
- } else { /* If Obj found in machine (i.e. has not moved) */
- /* Check if Obj is locked by any previous transaction */
- if ((STATUS(((objheader_t *)mobj)) & LOCK) == LOCK) {
- if (version == ((objheader_t *)mobj)->version) { /* If locked then match versions */
- v_matchlock++;
- } else {/* If versions don't match ...HARD ABORT */
- v_nomatch++;
- /* Send TRANS_DISAGREE to Coordinator */
- localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_DISAGREE;
- }
- } else {/* If Obj is not locked then lock object */
- STATUS(((objheader_t *)mobj)) |= LOCK;
- /* Save all object oids that are locked on this machine during this transaction request call */
- oidlocked[objlocked] = OID(((objheader_t *)mobj));
- objlocked++;
- if (version == ((objheader_t *)mobj)->version) { /* Check if versions match */
- v_matchnolock++;
- } else { /* If versions don't match ...HARD ABORT */
- v_nomatch++;
- /* Send TRANS_DISAGREE to Coordinator */
- localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_DISAGREE;
- }
- }
- }
- } // End for
- /* Condition to send TRANS_AGREE */
- if(v_matchnolock == localtdata->tdata->buffer->f.numread + localtdata->tdata->buffer->f.nummod) {
- localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_AGREE;
- }
- /* Condition to send TRANS_SOFT_ABORT */
- if((v_matchlock > 0 && v_nomatch == 0) || (objnotfound > 0 && v_nomatch == 0)) {
- localtdata->tdata->recvmsg[localtdata->tdata->thread_id].rcv_status = TRANS_SOFT_ABORT;
- }
+/*This function completes the COMMIT process if the transaction is commiting*/
+int transComProcess(trans_req_data_t *tdata, trans_commit_data_t *transinfo) {
+ objheader_t *header, *tcptr;
+ int i, nummod, tmpsize, numcreated, numlocked;
+ unsigned int *oidmod, *oidcreated, *oidlocked;
+ void *ptrcreate;
+
+ nummod = tdata->f.nummod;
+ oidmod = tdata->oidmod;
+ numcreated = tdata->f.numcreated;
+ oidcreated = tdata->oidcreated;
+ numlocked = transinfo->numlocked;
+ oidlocked = transinfo->objlocked;
+
+ for (i = 0; i < nummod; i++) {
+ if((header = (objheader_t *) mhashSearch(oidmod[i])) == NULL) {
+ printf("Error: transComProcess() mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ /* Copy from transaction cache -> main object store */
+ if ((tcptr = ((objheader_t *) t_chashSearch(oidmod[i]))) == NULL) {
+ printf("Error: transComProcess() chashSearch returned NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ GETSIZE(tmpsize, header);
+ char *tmptcptr = (char *) tcptr;
+ {
+ struct ___Object___ *dst=(struct ___Object___*)((char*)header+sizeof(objheader_t));
+ struct ___Object___ *src=(struct ___Object___*)((char*)tmptcptr+sizeof(objheader_t));
+ dst->___cachedCode___=src->___cachedCode___;
+ dst->___cachedHash___=src->___cachedHash___;
+
+ memcpy(&dst[1], &src[1], tmpsize-sizeof(struct ___Object___));
+ }
+
+ header->version += 1;
+ if(header->notifylist != NULL) {
+ notifyAll(&header->notifylist, OID(header), header->version);
+ }
+ }
+ /* If object is newly created inside transaction then commit it */
+ for (i = 0; i < numcreated; i++) {
+ if ((header = ((objheader_t *) t_chashSearch(oidcreated[i]))) == NULL) {
+ printf("Error: transComProcess() chashSearch returned NULL for oid = %x at %s, %d\n", oidcreated[i], __FILE__, __LINE__);
+ return 1;
+ }
+ GETSIZE(tmpsize, header);
+ tmpsize += sizeof(objheader_t);
+ pthread_mutex_lock(&mainobjstore_mutex);
+ if ((ptrcreate = objstrAlloc(&mainobjstore, tmpsize)) == NULL) {
+ printf("Error: transComProcess() failed objstrAlloc %s, %d\n", __FILE__, __LINE__);
+ pthread_mutex_unlock(&mainobjstore_mutex);
+ return 1;
+ }
+ pthread_mutex_unlock(&mainobjstore_mutex);
+ /* Initialize read and write locks */
+ initdsmlocks(STATUSPTR(header));
+ memcpy(ptrcreate, header, tmpsize);
+ mhashInsert(oidcreated[i], ptrcreate);
+ lhashInsert(oidcreated[i], myIpAddr);
+ }
+ /* Unlock locked objects */
+ int useWriteUnlock = 0;
+ for(i = 0; i < numlocked; i++) {
+ if(oidlocked[i] == -1) {
+ useWriteUnlock = 1;
+ continue;
+ }
+ if((header = (objheader_t *) mhashSearch(oidlocked[i])) == NULL) {
+ printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
+ return 1;
+ }
+ if(!useWriteUnlock) {
+ read_unlock(STATUSPTR(header));
+ } else {
+ write_unlock(STATUSPTR(header));
+ }
+ }
+ return 0;
+}
- /* Fill out the trans_commit_data_t data structure. This is required for a trans commit process
- * if Participant receives a TRANS_COMMIT */
- localtdata->transinfo->objlocked = oidlocked;
- localtdata->transinfo->objnotfound = oidnotfound;
- localtdata->transinfo->modptr = NULL;
- localtdata->transinfo->numlocked = objlocked;
- localtdata->transinfo->numnotfound = objnotfound;
- /* Lock and update count */
- //Thread sleeps until all messages from pariticipants are received by coordinator
- pthread_mutex_lock(localtdata->tdata->lock);
- (*(localtdata->tdata->count))++; /* keeps track of no of messages received by the coordinator */
-
- /* Wake up the threads and invoke decideResponse (once) */
- if(*(localtdata->tdata->count) == localtdata->tdata->buffer->f.mcount) {
- decideResponse(localtdata->tdata);
- pthread_cond_broadcast(localtdata->tdata->threshold);
- } else {
- pthread_cond_wait(localtdata->tdata->threshold, localtdata->tdata->lock);
- }
- pthread_mutex_unlock(localtdata->tdata->lock);
- if(*(localtdata->tdata->replyctrl) == TRANS_ABORT){
- if(transAbortProcess(localtdata) != 0) {
- printf("Error in transAbortProcess() %s,%d\n", __FILE__, __LINE__);
- pthread_exit(NULL);
- }
- } else if(*(localtdata->tdata->replyctrl) == TRANS_COMMIT) {
- if(transComProcess(localtdata) != 0) {
- printf("Error in transComProcess() %s,%d\n", __FILE__, __LINE__);
- pthread_exit(NULL);
- }
+prefetchpile_t *foundLocal(char *ptr, int numprefetches, int mysiteid) {
+ int i;
+ int j;
+ prefetchpile_t * head=NULL;
+
+ for(j=0;j<numprefetches;j++) {
+ int siteid = *(GET_SITEID(ptr));
+ int ntuples = *(GET_NTUPLES(ptr));
+ unsigned int * oidarray = GET_PTR_OID(ptr);
+ unsigned short * endoffsets = GET_PTR_EOFF(ptr, ntuples);
+ short * arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
+ int numLocal = 0;
+
+ for(i=0; i<ntuples; i++) {
+ unsigned short baseindex=(i==0) ? 0 : endoffsets[i-1];
+ unsigned short endindex=endoffsets[i];
+ unsigned int oid=oidarray[i];
+ int newbase;
+ int machinenum;
+ int countInvalidObj=0;
+
+ if (oid==0) {
+ numLocal++;
+ continue;
+ }
+ //Look up fields locally
+ int isLastOffset=0;
+ if(endindex==0)
+ isLastOffset=1;
+ for(newbase=baseindex; newbase<endindex; newbase++) {
+ if(newbase==(endindex-1))
+ isLastOffset=1;
+ if (!lookupObject(&oid,arryfields[newbase],&countInvalidObj)) {
+ break;
}
- /* Free memory */
- if (localtdata->transinfo->objlocked != NULL) {
- free(localtdata->transinfo->objlocked);
- }
- if (localtdata->transinfo->objnotfound != NULL) {
- free(localtdata->transinfo->objnotfound);
+ //Ended in a null pointer...
+ if (oid==0) {
+ numLocal++;
+ goto tuple;
}
+ }
+
+ //Entire prefetch is local
+ if (newbase==endindex&&checkoid(oid,isLastOffset)) {
+ numLocal++;
+ goto tuple;
+ }
+
+ //Add to remote requests
+ machinenum=lhashSearch(oid);
+ insertPile(machinenum, oid, siteid,endindex-newbase, &arryfields[newbase], &head);
+ tuple:
+ ;
+ }
+
+ /* handle dynamic prefetching */
+ handleDynPrefetching(numLocal, ntuples, siteid);
+ ptr=((char *)&arryfields[endoffsets[ntuples-1]])+sizeof(int);
+ }
- pthread_exit(NULL);
+ return head;
}
-/* This function completes the ABORT process if the transaction is aborting */
-int transAbortProcess(local_thread_data_array_t *localtdata) {
- int i, numlocked;
- unsigned int *objlocked;
- void *header;
-
- numlocked = localtdata->transinfo->numlocked;
- objlocked = localtdata->transinfo->objlocked;
-
- for (i = 0; i < numlocked; i++) {
- if((header = mhashSearch(objlocked[i])) == NULL) {
- printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- STATUS(((objheader_t *)header)) &= ~(LOCK);
- }
+int checkoid(unsigned int oid, int isLastOffset) {
+ objheader_t *header;
+ if ((header=mhashSearch(oid))!=NULL) {
+ //Found on machine
+ return 1;
+ } else if ((header=prehashSearch(oid))!=NULL) {
+ //if the last offset then prefetch object
+ if((STATUS(header) & DIRTY) && isLastOffset) {
+ return 0;
+ }
+ //Found in cache
+ return 1;
+ } else {
+ return 0;
+ }
+}
- printf("TRANS_ABORTED at Coordinator end\n");
+int lookupObject(unsigned int * oid, short offset, int *countInvalidObj) {
+ objheader_t *header;
+ if ((header=mhashSearch(*oid))!=NULL) {
+ //Found on machine
+ ;
+ } else if ((header=prehashSearch(*oid))!=NULL) {
+ //Found in cache
+ if(STATUS(header) & DIRTY) {//Read an oid that is an old entry in the cache;
+ //only once because later old entries may still cause unnecessary roundtrips during prefetching
+ (*countInvalidObj)+=1;
+ if(*countInvalidObj > 1) {
+ return 0;
+ }
+ }
+ } else {
+ return 0;
+ }
- return 0;
+ if(TYPE(header) >= NUMCLASSES) {
+ int elementsize = classsize[TYPE(header)];
+ struct ArrayObject *ao = (struct ArrayObject *) (((char *)header) + sizeof(objheader_t));
+ int length = ao->___length___;
+ /* Check if array out of bounds */
+ if(offset < 0 || offset >= length) {
+ //if yes treat the object as found
+ (*oid)=0;
+ return 1;
+ }
+ (*oid) = *((unsigned int *)(((char *)ao) + sizeof(struct ArrayObject) + (elementsize*offset)));
+ return 1;
+ } else {
+ (*oid) = *((unsigned int *)(((char *)header) + sizeof(objheader_t) + offset));
+ return 1;
+ }
}
-/*This function completes the COMMIT process is the transaction is commiting*/
-int transComProcess(local_thread_data_array_t *localtdata) {
- objheader_t *header, *tcptr;
- int i, nummod, tmpsize, numcreated, numlocked;
- unsigned int *oidmod, *oidcreated, *oidlocked;
- void *ptrcreate;
-
- nummod = localtdata->tdata->buffer->f.nummod;
- oidmod = localtdata->tdata->buffer->oidmod;
- numcreated = localtdata->tdata->buffer->f.numcreated;
- oidcreated = localtdata->tdata->buffer->oidcreated;
- numlocked = localtdata->transinfo->numlocked;
- oidlocked = localtdata->transinfo->objlocked;
- for (i = 0; i < nummod; i++) {
- if((header = (objheader_t *) mhashSearch(oidmod[i])) == NULL) {
- printf("Error: transComProcess() mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- /* Copy from transaction cache -> main object store */
- if ((tcptr = ((objheader_t *) chashSearch(localtdata->tdata->rec->lookupTable, oidmod[i]))) == NULL) {
- printf("Error: transComProcess() chashSearch returned NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- GETSIZE(tmpsize, header);
-
- pthread_mutex_lock(&mainobjstore_mutex);
- memcpy(header, tcptr, tmpsize + sizeof(objheader_t));
- header->version += 1;
- pthread_mutex_unlock(&mainobjstore_mutex);
- }
- /* If object is newly created inside transaction then commit it */
- for (i = 0; i < numcreated; i++) {
- if ((header = ((objheader_t *) chashSearch(localtdata->tdata->rec->lookupTable, oidcreated[i]))) == NULL) {
- printf("Error: transComProcess() chashSearch returned NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- GETSIZE(tmpsize, header);
- pthread_mutex_lock(&mainobjstore_mutex);
- if ((ptrcreate = objstrAlloc(mainobjstore, tmpsize)) == NULL) {
- printf("Error: transComProcess() failed objstrAlloc\n");
- pthread_mutex_unlock(&mainobjstore_mutex);
- return 1;
- }
- pthread_mutex_unlock(&mainobjstore_mutex);
- memcpy(ptrcreate, header, tmpsize + sizeof(objheader_t));
-
- mhashInsert(oidcreated[i], ptrcreate);
- lhashInsert(oidcreated[i], myIpAddr);
- }
- /* Unlock locked objects */
- for(i = 0; i < numlocked; i++) {
- if((header = (objheader_t *) mhashSearch(oidlocked[i])) == NULL) {
- printf("mhashsearch returns NULL at %s, %d\n", __FILE__, __LINE__);
- return 1;
- }
- STATUS(header) &= ~(LOCK);
- }
- return 0;
-}
-/* This function checks if the prefetch oids are same and have same offsets
- * for case x.a.b and y.a.b where x and y have same oid's
- * or if a.b.c is a subset of x.b.c.d*/
-/* check for case where the generated request a.y.z or x.y.z.g then
- * prefetch needs to be generated for x.y.z.g if oid of a and x are same*/
-void checkPrefetchTuples(prefetchqelem_t *node) {
- int i,j, count,k, sindex, index;
- char *ptr, *tmp;
- int ntuples, slength;
- unsigned int *oid;
- short *endoffsets, *arryfields;
-
- /* Check for the case x.y.z and a.b.c are same oids */
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- oid = GET_PTR_OID(ptr);
- endoffsets = GET_PTR_EOFF(ptr, ntuples);
- arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
- /* Find offset length for each tuple */
- int numoffset[ntuples];
- numoffset[0] = endoffsets[0];
- for(i = 1; i<ntuples; i++) {
- numoffset[i] = endoffsets[i] - endoffsets[i-1];
- }
- /* Check for redundant tuples by comparing oids of each tuple */
- for(i = 0; i < ntuples; i++) {
- if(oid[i] == -1)
- continue;
- for(j = i+1 ; j < ntuples; j++) {
- if(oid[j] == -1)
- continue;
- /*If oids of tuples match */
- if (oid[i] == oid[j]) {
- /* Find the smallest offset length of two tuples*/
- if(numoffset[i] > numoffset[j]){
- slength = numoffset[j];
- sindex = j;
- }
- else {
- slength = numoffset[i];
- sindex = i;
- }
-
- /* Compare the offset values based on the current indices
- * break if they do not match
- * if all offset values match then pick the largest tuple*/
-
- if(i == 0) {
- k = 0;
- index = endoffsets[j -1];
- for(count = 0; count < slength; count ++) {
- if (arryfields[k] != arryfields[index]) {
- break;
- }
- index++;
- k++;
- }
- } else {
- k = endoffsets[i-1];
- index = endoffsets[j-1];
- for(count = 0; count < slength; count++) {
- if(arryfields[k] != arryfields[index]) {
- break;
- }
- index++;
- k++;
- }
- }
-
- if(slength == count) {
- oid[sindex] = -1;
- }
- }
- }
- }
+/* This function is called by the thread calling transPrefetch */
+void *transPrefetch(void *t) {
+ while(1) {
+ /* read from prefetch queue */
+ void *node=gettail();
+ /* Check if the tuples are found locally, if yes then reduce them further*/
+ /* and group requests by remote machine ids by calling the makePreGroups() */
+ int count=numavailable();
+ prefetchpile_t *pilehead = foundLocal(node, count, 0);
+
+ if (pilehead!=NULL) {
+ // Get sock from shared pool
+
+ /* Send Prefetch Request */
+ prefetchpile_t *ptr = pilehead;
+ while(ptr != NULL) {
+ globalid++;
+ int sd = getSock2(transPrefetchSockPool, ptr->mid);
+ sendPrefetchReq(ptr, sd,globalid);
+ ptr = ptr->next;
+ }
+
+ /* Release socket */
+ // freeSock(transPrefetchSockPool, pilehead->mid, sd);
+
+ /* Deallocated pilehead */
+ mcdealloc(pilehead);
+ }
+ // Deallocate the prefetch queue pile node
+ incmulttail(count);
+ }
}
-void checkPreCache(prefetchqelem_t *node, int *numoffset, int counter, int loopcount, unsigned int objoid, int index, int iter, int oidnfound) {
- char *ptr, *tmp;
- int ntuples, i, k, flag;
- unsigned int * oid;
- short *endoffsets, *arryfields;
- objheader_t *header;
-
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- oid = GET_PTR_OID(ptr);
- endoffsets = GET_PTR_EOFF(ptr, ntuples);
- arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
-
- if(oidnfound == 1) {
- if((header = (objheader_t *) prehashSearch(objoid)) == NULL) {
- return;
- } else { //Found in Prefetch Cache
- //TODO Decide if object is too old, if old remove from cache
- tmp = (char *) header;
- /* Check if any of the offset oid is available in the Prefetch cache */
- for(i = counter; i < loopcount; i++) {
- objoid = *(tmp + sizeof(objheader_t) + arryfields[counter]);
- if((header = (objheader_t *)prehashSearch(objoid)) != NULL) {
- flag = 0;
- } else {
- flag = 1;
- break;
- }
- }
- }
- } else {
- for(i = counter; i<loopcount; i++) {
- if((header = (objheader_t *)prehashSearch(objoid)) != NULL) {
- tmp = (char *) header;
- objoid = *(tmp + sizeof(objheader_t) + arryfields[index]);
- flag = 0;
- index++;
- } else {
- flag = 1;
- break;
- }
- }
- }
+void sendPrefetchReqnew(prefetchpile_t *mcpilenode, int sd) {
+ objpile_t *tmp;
- /* If oid not found locally or in prefetch cache then
- * assign the latest oid found as the new oid
- * and copy left over offsets into the arrayoffsetfieldarray*/
- oid[iter] = objoid;
- numoffset[iter] = numoffset[iter] - (i+1);
- for(k = 0; k < numoffset[iter] ; k++) {
- arryfields[endoffsets[counter]+k] = arryfields[endoffsets[counter]+k+1];
- }
+ int size=sizeof(char)+sizeof(int);
+ for(tmp=mcpilenode->objpiles; tmp!=NULL; tmp=tmp->next) {
+ size += sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ }
- if(flag == 0) {
- oid[iter] = -1;
- numoffset[iter] = 0;
- }
+ char buft[size];
+ char *buf=buft;
+ *buf=TRANS_PREFETCH;
+ buf+=sizeof(char);
+
+ for(tmp=mcpilenode->objpiles; tmp!=NULL; tmp=tmp->next) {
+ int len = sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ *((int*)buf)=len;
+ buf+=sizeof(int);
+ *((unsigned int *)buf)=tmp->oid;
+ buf+=sizeof(unsigned int);
+ *((unsigned int *)(buf)) = myIpAddr;
+ buf+=sizeof(unsigned int);
+ memcpy(buf, tmp->offset, tmp->numoffset*sizeof(short));
+ buf+=tmp->numoffset*sizeof(short);
+ }
+ *((int *)buf)=-1;
+ send_data(sd, buft, size);
+ return;
}
-/* This function makes machine piles to be added into the machine pile queue for each prefetch call */
-prefetchpile_t *makePreGroups(prefetchqelem_t *node, int *numoffset) {
- char *ptr, *tmp;
- int ntuples, slength, i, machinenum;
- int maxoffset;
- unsigned int *oid;
- short *endoffsets, *arryfields, *offset;
- prefetchpile_t *head = NULL;
-
- /* Check for the case x.y.z and a.b.c are same oids */
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- oid = GET_PTR_OID(ptr);
- endoffsets = GET_PTR_EOFF(ptr, ntuples);
- arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
-
- /* Check for redundant tuples by comparing oids of each tuple */
- for(i = 0; i < ntuples; i++) {
- if(oid[i] == -1)
- continue;
- /* For each tuple make piles */
- if ((machinenum = lhashSearch(oid[i])) == 0) {
- printf("Error: No such Machine %s, %d\n", __FILE__, __LINE__);
- return NULL;
- }
- /* Insert into machine pile */
- offset = &arryfields[endoffsets[i-1]];
- insertPile(machinenum, oid[i], numoffset[i], offset, &head);
- }
- return head;
+/**
+ * parameters: mcpilenode -> pile node to traverse to assemble pref requests
+ * sd -> socket id
+ * gid -> global identifier for each prefetch request sent, starts with 0
+ **/
+void sendPrefetchReq(prefetchpile_t *mcpilenode, int sd, int gid) {
+ int len, endpair;
+ char control;
+ objpile_t *tmp;
+ struct writestruct writebuffer;
+ writebuffer.offset=0;
+
+
+ /* Send TRANS_PREFETCH control message */
+ int first=1;
+
+ /* Send Oids and offsets in pairs */
+ tmp = mcpilenode->objpiles;
+ while(tmp != NULL) {
+ len = sizeof(int)+sizeof(int) + sizeof(unsigned int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
+ char oidnoffset[len+5];
+ char *buf=oidnoffset;
+ if (first) {
+ *buf=TRANS_PREFETCH;
+ buf++;len++;
+ first=0;
+ }
+ *((int*)buf) = tmp->numoffset;
+ buf+=sizeof(int);
+ *((unsigned int *)buf) = tmp->oid;
+ LOGOIDTYPE("S",tmp->oid,tmp->numoffset,myrdtsc());
+#ifdef TRANSSTATS
+ sendRemoteReq++;
+#endif
+ buf+=sizeof(unsigned int);
+ *((unsigned int *)buf) = myIpAddr;
+ buf+= sizeof(unsigned int);
+ *((int*)buf) = gid;
+ buf+=sizeof(int);
+ memcpy(buf, tmp->offset, (tmp->numoffset)*sizeof(short));
+ tmp = tmp->next;
+ if (tmp==NULL) {
+ *((int *)(&oidnoffset[len]))=-1;
+ len+=sizeof(int);
+ }
+ if (tmp!=NULL)
+ send_buf(sd, &writebuffer, oidnoffset, len);
+ else
+ forcesend_buf(sd, &writebuffer, oidnoffset, len);
+ }
+ LOGOIDTYPE("SREQ",0,0,myrdtsc());
+ LOGEVENT('S');
+ LOGTIME('S',0,0,myrdtsc(),gid); //after sending
+ return;
}
+int getPrefetchResponse(int sd, struct readstruct *readbuffer) {
+ int gid,length = 0, size = 0;
+ char control;
+ unsigned int oid;
+ void *modptr, *oldptr;
+
+ recv_data_buf(sd, readbuffer, &length, sizeof(int));
+ size = length - sizeof(int);
+ char recvbuffer[size];
+#ifdef TRANSSTATS
+ getResponse++;
+ LOGEVENT('Z');
+ LOGTIME('K',0,0, myrdtsc(),0); //log time after first recv
+#endif
+ recv_data_buf(sd, readbuffer, recvbuffer, size);
+ control = *((char *) recvbuffer);
+ if(control == OBJECT_FOUND) {
+ oid = *((unsigned int *)(recvbuffer + sizeof(char)));
+ gid = *((int *) (recvbuffer+sizeof(char)+sizeof(unsigned int)));
+ LOGTIME('G',oid,0, myrdtsc(),gid); //log time after first recv
+ size = size - (sizeof(char) + sizeof(unsigned int) + sizeof(int));
+ pthread_mutex_lock(&prefetchcache_mutex);
+ if ((modptr = prefetchobjstrAlloc(size)) == NULL) {
+ printf("Error: objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ return -1;
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ memcpy(modptr, recvbuffer + sizeof(char) + sizeof(unsigned int)+sizeof(int), size);
+ STATUS(modptr)=0;
+
+
+ /* Insert the oid and its address into the prefetch hash lookup table */
+ /* Do a version comparison if the oid exists */
+ if((oldptr = prehashSearch(oid)) != NULL) {
+ /* If older version then update with new object ptr */
+ if(((objheader_t *)oldptr)->version < ((objheader_t *)modptr)->version) {
+ prehashInsert(oid, modptr);
+ }
+ } else { /* Else add the object ptr to hash table*/
+ prehashInsert(oid, modptr);
+ }
+ LOGOIDTYPE("GR",oid, TYPE(modptr),myrdtsc());
+ LOGTIME('Z',oid, TYPE(modptr), myrdtsc(),gid); //log time after copying it into the prefetch cache
+ } else if(control == OBJECT_NOT_FOUND) {
+ oid = *((unsigned int *)(recvbuffer + sizeof(char)));
+ gid = *((int *) (recvbuffer+sizeof(char)+sizeof(unsigned int)));
+ LOGOIDTYPE("NF",oid,0,myrdtsc());
+ LOGTIME('F',oid, 0, myrdtsc(),gid); //log time after copying it into the prefetch cache
+ /* TODO: For each object not found query DHT for new location and retrieve the object */
+ /* Throw an error */
+ //printf("OBJECT %x NOT FOUND.... THIS SHOULD NOT HAPPEN...TERMINATE PROGRAM\n", oid);
+ // exit(-1);
+ } else {
+ printf("Error: in decoding the control value %d, %s, %d\n",control, __FILE__, __LINE__);
+ }
-/* This function checks if the oids within the prefetch tuples are available locally.
- * If yes then makes the tuple invalid. If no then rearranges oid and offset values in
- * the prefetchqelem_t node to represent a new prefetch tuple */
-prefetchpile_t *foundLocal(prefetchqelem_t *node) {
- int ntuples,i, j, k, oidnfound = 0, index, flag;
- unsigned int *oid;
- unsigned int objoid;
- char *ptr, *tmp;
- objheader_t *objheader;
- short *endoffsets, *arryfields;
- prefetchpile_t *head = NULL;
-
- ptr = (char *) node;
- ntuples = *(GET_NTUPLES(ptr));
- oid = GET_PTR_OID(ptr);
- endoffsets = GET_PTR_EOFF(ptr, ntuples);
- arryfields = GET_PTR_ARRYFLD(ptr, ntuples);
- /* Find offset length for each tuple */
- int numoffset[ntuples];//Number of offsets for each tuple
- numoffset[0] = endoffsets[0];
- for(i = 1; i<ntuples; i++) {
- numoffset[i] = endoffsets[i] - endoffsets[i-1];
- }
- for(i = 0; i < ntuples; i++) {
- if(oid[i] == -1)
- continue;
- /* If object found locally */
- if((objheader = (objheader_t*) mhashSearch(oid[i])) != NULL) {
- oidnfound = 0;
- tmp = (char *) objheader;
- /* Find the oid of its offset value */
- if(i == 0)
- index = 0;
- else
- index = endoffsets[i - 1];
- for(j = 0 ; j < numoffset[i] ; j++) {
- objoid = *(tmp + sizeof(objheader_t) + arryfields[index]);
- /*If oid found locally then
- *assign the latest oid found as the new oid
- *and copy left over offsets into the arrayoffsetfieldarray*/
- oid[i] = objoid;
- numoffset[i] = numoffset[i] - (j+1);
- for(k = 0; k < numoffset[i]; k++)
- arryfields[endoffsets[j]+ k] = arryfields[endoffsets[j]+k+1];
- index++;
- /*New offset oid not found */
- if((objheader = (objheader_t*) mhashSearch(objoid)) == NULL) {
- flag = 1;
- checkPreCache(node, numoffset, j, numoffset[i], objoid, index, i, oidnfound);
- break;
- } else
- flag = 0;
- }
-
- /*If all offset oids are found locally,make the prefetch tuple invalid */
- if(flag == 0) {
- oid[i] = -1;
- numoffset[i] = 0;
- }
- } else {
- oidnfound = 1;
- /* Look in Prefetch cache */
- checkPreCache(node, numoffset, 0, numoffset[i], oid[i], 0, i, oidnfound);
- }
+ return 0;
+}
- }
- /* Make machine groups */
- head = makePreGroups(node, numoffset);
- return head;
+unsigned short getObjType(unsigned int oid) {
+ objheader_t *objheader;
+ unsigned short numoffset[] ={0};
+ short fieldoffset[] ={};
+
+ if ((objheader = (objheader_t *) mhashSearch(oid)) == NULL) {
+#ifdef CACHE
+ if ((objheader = (objheader_t *) prehashSearch(oid)) == NULL) {
+#endif
+ unsigned int mid = lhashSearch(oid);
+ int sd = getSock2(transReadSockPool, mid);
+ char remotereadrequest[sizeof(char)+sizeof(unsigned int)];
+ remotereadrequest[0] = READ_REQUEST;
+ *((unsigned int *)(&remotereadrequest[1])) = oid;
+ send_data(sd, remotereadrequest, sizeof(remotereadrequest));
+
+ /* Read response from the Participant */
+ char control;
+ recv_data(sd, &control, sizeof(char));
+
+ if (control==OBJECT_NOT_FOUND) {
+ printf("Error: in %s() THIS SHOULD NOT HAPPEN.....EXIT PROGRAM\n", __func__);
+ fflush(stdout);
+ exit(-1);
+ } else {
+ /* Read object if found into local cache */
+ int size;
+ recv_data(sd, &size, sizeof(int));
+#ifdef CACHE
+ pthread_mutex_lock(&prefetchcache_mutex);
+ if ((objheader = prefetchobjstrAlloc(size)) == NULL) {
+ printf("Error: %s() objstrAlloc error for copying into prefetch cache %s, %d\n", __func__, __FILE__, __LINE__);
+ pthread_exit(NULL);
+ }
+ pthread_mutex_unlock(&prefetchcache_mutex);
+ recv_data(sd, objheader, size);
+ prehashInsert(oid, objheader);
+ return TYPE(objheader);
+#else
+ char *buffer;
+ if((buffer = calloc(1, size)) == NULL) {
+ printf("%s() Calloc Error %s at line %d\n", __func__, __FILE__, __LINE__);
+ fflush(stdout);
+ return 0;
+ }
+ recv_data(sd, buffer, size);
+ objheader = (objheader_t *)buffer;
+ unsigned short type = TYPE(objheader);
+ free(buffer);
+ return type;
+#endif
+ }
+#ifdef CACHE
+ }
+#endif
+ }
+ return TYPE(objheader);
}
-/* This function is called by the thread calling transPrefetch */
-void *transPrefetch(void *t) {
- prefetchqelem_t *qnode;
- prefetchpile_t *pilehead = NULL;
-
- while(1) {
- /* lock mutex of primary prefetch queue */
- pthread_mutex_lock(&pqueue.qlock);
- /* while primary queue is empty, then wait */
- while((pqueue.front == NULL) && (pqueue.rear == NULL)) {
- pthread_cond_wait(&pqueue.qcond, &pqueue.qlock);
- }
-
- /* dequeue node to create a machine piles and finally unlock mutex */
- if((qnode = pre_dequeue()) == NULL) {
- printf("Error: No node returned %s, %d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(&pqueue.qlock);
- pthread_exit(NULL);
- }
- pthread_mutex_unlock(&pqueue.qlock);
- /* Reduce redundant prefetch requests */
- checkPrefetchTuples(qnode);
- /* Check if the tuples are found locally, if yes then reduce them further*/
- /* and group requests by remote machine ids by calling the makePreGroups() */
- pilehead = foundLocal(qnode);
-
- /* Lock mutex of pool queue */
- pthread_mutex_lock(&mcqueue.qlock);
- /* Update the pool queue with the new remote machine piles generated per prefetch call */
- mcpileenqueue(pilehead);
- /* Broadcast signal on machine pile queue */
- pthread_cond_broadcast(&mcqueue.qcond);
- /* Unlock mutex of machine pile queue */
- pthread_mutex_unlock(&mcqueue.qlock);
- /* Deallocate the prefetch queue pile node */
- predealloc(qnode);
+int startRemoteThread(unsigned int oid, unsigned int mid) {
+ int sock;
+ struct sockaddr_in remoteAddr;
+ char msg[1 + sizeof(unsigned int)];
+ //int bytesSent;
+ int status;
- }
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ perror("startRemoteThread():socket()");
+ return -1;
+ }
+
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
+
+ if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
+ printf("startRemoteThread():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ status = -1;
+ } else
+ {
+ msg[0] = START_REMOTE_THREAD;
+ *((unsigned int *) &msg[1]) = oid;
+ send_data(sock, msg, 1 + sizeof(unsigned int));
+ }
+
+ close(sock);
+ return status;
}
-/* Each thread in the pool of threads calls this function to establish connection with
- * remote machines, send the prefetch requests and process the reponses from
- * the remote machines .
- * The thread is active throughout the period of runtime */
-
-void *mcqProcess(void *threadid) {
- int tid;
- prefetchpile_t *mcpilenode;
-
- tid = (int) threadid;
- while(1) {
- /* Lock mutex of mc pile queue */
- pthread_mutex_lock(&mcqueue.qlock);
- /* When mc pile queue is empty, wait */
- while((mcqueue.front == NULL) && (mcqueue.rear == NULL)) {
- pthread_cond_wait(&mcqueue.qcond, &mcqueue.qlock);
- }
- /* Dequeue node to send remote machine connections*/
- if((mcpilenode = mcpiledequeue()) == NULL) {
- printf("Dequeue Error: No node returned %s %d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(&mcqueue.qlock);
- pthread_exit(NULL);
- }
- /* Unlock mutex */
- pthread_mutex_unlock(&mcqueue.qlock);
-
- /*Initiate connection to remote host and send request */
- /* Process Request */
- sendPrefetchReq(mcpilenode, tid);
-
- /* Deallocate the machine queue pile node */
- mcdealloc(mcpilenode);
- }
+//TODO: when reusing oids, make sure they are not already in use!
+static unsigned int id = 0xFFFFFFFF;
+unsigned int getNewOID(void) {
+ id += 2;
+ if (id > oidMax || id < oidMin) {
+ id = (oidMin | 1);
+ }
+ return id;
}
-void sendPrefetchReq(prefetchpile_t *mcpilenode, int threadid) {
- int sd, i, offset, off, len, endpair, count = 0;
- struct sockaddr_in serv_addr;
- struct hostent *server;
- char machineip[16], control;
- objpile_t *tmp;
+int processConfigFile() {
+ FILE *configFile;
+ const int maxLineLength = 200;
+ char lineBuffer[maxLineLength];
+ char *token;
+ const char *delimiters = " \t\n";
+ char *commentBegin;
+ in_addr_t tmpAddr;
+
+ configFile = fopen(CONFIG_FILENAME, "r");
+ if (configFile == NULL) {
+ printf("error opening %s:\n", CONFIG_FILENAME);
+ perror("");
+ return -1;
+ }
+ numHostsInSystem = 0;
+ sizeOfHostArray = 8;
+ hostIpAddrs = calloc(sizeOfHostArray, sizeof(unsigned int));
+
+ while(fgets(lineBuffer, maxLineLength, configFile) != NULL) {
+ commentBegin = strchr(lineBuffer, '#');
+ if (commentBegin != NULL)
+ *commentBegin = '\0';
+ token = strtok(lineBuffer, delimiters);
+ while (token != NULL) {
+ tmpAddr = inet_addr(token);
+ if ((int)tmpAddr == -1) {
+ printf("error in %s: bad token:%s\n", CONFIG_FILENAME, token);
+ fclose(configFile);
+ return -1;
+ } else
+ addHost(htonl(tmpAddr));
+ token = strtok(NULL, delimiters);
+ }
+ }
- /* Send Trans Prefetch Request */
- if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- perror("Error in socket for TRANS_REQUEST\n");
- return;
- }
- bzero((char*) &serv_addr, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(LISTEN_PORT);
- midtoIP(mcpilenode->mid ,machineip);
- machineip[15] = '\0';
- serv_addr.sin_addr.s_addr = inet_addr(machineip);
-
- /* Open Connection */
- if (connect(sd, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr)) < 0) {
- perror("Error in connect for TRANS_REQUEST\n");
- close(sd);
- return;
- }
+ fclose(configFile);
- /* Send TRANS_PREFETCH control message */
- control = TRANS_PREFETCH;
- if(send(sd, &control, sizeof(char), MSG_NOSIGNAL) < sizeof(char)) {
- perror("Error in sending prefetch control\n");
- close(sd);
- return;
- }
+ if (numHostsInSystem < 1) {
+ printf("error in %s: no IP Adresses found\n", CONFIG_FILENAME);
+ return -1;
+ }
+#ifdef MAC
+ myIpAddr = getMyIpAddr("en1");
+#else
+ myIpAddr = getMyIpAddr("eth0");
+#endif
+ myIndexInHostArray = findHost(myIpAddr);
+ if (myIndexInHostArray == -1) {
+ printf("error in %s: IP Address of eth0 not found\n", CONFIG_FILENAME);
+ return -1;
+ }
+ oidsPerBlock = (0xFFFFFFFF / numHostsInSystem) + 1;
+ oidMin = oidsPerBlock * myIndexInHostArray;
+ if (myIndexInHostArray == numHostsInSystem - 1)
+ oidMax = 0xFFFFFFFF;
+ else
+ oidMax = oidsPerBlock * (myIndexInHostArray + 1) - 1;
+
+ return 0;
+}
- /* Send Oids and offsets in pairs */
- tmp = mcpilenode->objpiles;
- while(tmp != NULL) {
- off = offset = 0;
- count++; /* Keeps track of the number of oid and offset tuples sent per remote machine */
- len = sizeof(int) + sizeof(unsigned int) + ((tmp->numoffset) * sizeof(short));
- char oidnoffset[len];
- memcpy(oidnoffset, &len, sizeof(int));
- off = sizeof(int);
- memcpy(oidnoffset + off, &tmp->oid, sizeof(unsigned int));
- off += sizeof(unsigned int);
- for(i = 0; i < tmp->numoffset; i++) {
- memcpy(oidnoffset + off, &tmp->offset[i], sizeof(short));
- off+=sizeof(short);
- }
- if (send(sd, &oidnoffset, sizeof(oidnoffset),MSG_NOSIGNAL) < sizeof(oidnoffset)) {
- perror("Error sending fixed bytes for thread\n");
- close(sd);
- return;
- }
- tmp = tmp->next;
- }
+void addHost(unsigned int hostIp) {
+ unsigned int *tmpArray;
- /* Send a special char -1 to represent the end of sending oids + offset pair to remote machine */
- endpair = -1;
- if (send(sd, &endpair, sizeof(int), MSG_NOSIGNAL) < sizeof(int)) {
- perror("Error sending fixed bytes for thread\n");
- close(sd);
- return;
- }
+ if (findHost(hostIp) != -1)
+ return;
- /* Get Response from the remote machine */
- getPrefetchResponse(count,sd);
- close(sd);
- return;
-}
+ if (numHostsInSystem == sizeOfHostArray) {
+ tmpArray = calloc(sizeOfHostArray * 2, sizeof(unsigned int));
+ memcpy(tmpArray, hostIpAddrs, sizeof(unsigned int) * numHostsInSystem);
+ free(hostIpAddrs);
+ hostIpAddrs = tmpArray;
+ }
-void getPrefetchResponse(int count, int sd) {
- int i = 0, val, n, N, sum, index, objsize;
- unsigned int bufsize,oid;
- char buffer[RECEIVE_BUFFER_SIZE], control;
- char *ptr;
- void *modptr, *oldptr;
-
- /* Read prefetch response from the Remote machine */
- if((val = read(sd, &control, sizeof(char))) <= 0) {
- perror("No control response for Prefetch request sent\n");
- return;
- }
+ hostIpAddrs[numHostsInSystem++] = hostIp;
- if(control == TRANS_PREFETCH_RESPONSE) {
- /*For each oid and offset tuple sent as prefetch request to remote machine*/
- while(i < count) {
- sum = 0;
- index = 0;
- /* Read the size of buffer to be received */
- if((N = read(sd, buffer, sizeof(unsigned int))) <= 0) {
- perror("Size of buffer not recv\n");
- return;
- }
- memcpy(&bufsize, buffer, sizeof(unsigned int));
- ptr = buffer + sizeof(unsigned int);
- /* Keep receiving the buffer containing oid info */
- do {
- n = recv((int)sd, (void *)ptr+sum, bufsize-sum, 0);
- sum +=n;
- } while(sum < bufsize && n != 0);
- /* Decode the contents of the buffer */
- index = sizeof(unsigned int);
- while(index < (bufsize - sizeof(unsigned int))) {
- if(buffer[index] == OBJECT_FOUND) {
- /* Increment it to get the object */
- index += sizeof(char);
- memcpy(&oid, buffer + index, sizeof(unsigned int));
- index += sizeof(unsigned int);
- /* For each object found add to Prefetch Cache */
- memcpy(&objsize, buffer + index, sizeof(int));
- index+=sizeof(int);
- pthread_mutex_lock(&prefetchcache_mutex);
- if ((modptr = objstrAlloc(prefetchcache, objsize)) == NULL) {
- printf("objstrAlloc error for copying into prefetch cache %s, %d\n", __FILE__, __LINE__);
- pthread_mutex_unlock(&prefetchcache_mutex);
- return;
- }
- pthread_mutex_unlock(&prefetchcache_mutex);
- memcpy(modptr, buffer+index, objsize);
- index += objsize;
- /* Insert the oid and its address into the prefetch hash lookup table */
- /* Do a version comparison if the oid exists */
- if((oldptr = prehashSearch(oid)) != NULL) {
- /* If older version then update with new object ptr */
- if(((objheader_t *)oldptr)->version < ((objheader_t *)modptr)->version) {
- prehashRemove(oid);
- prehashInsert(oid, modptr);
- } else if(((objheader_t *)oldptr)->version == ((objheader_t *)modptr)->version) {
- /* Add the new object ptr to hash table */
- prehashRemove(oid);
- prehashInsert(oid, modptr);
- } else { /* Do nothing: TODO modptr should be reference counted */
- ;
- }
- } else {/*If doesn't no match found in hashtable, add the object ptr to hash table*/
- prehashInsert(oid, modptr);
- }
- /* Lock the Prefetch Cache look up table*/
- //pthread_mutex_lock(&pflookup.lock);
- /* Broadcast signal on prefetch cache condition variable */
- pthread_cond_broadcast(&pflookup.cond);
- /* Unlock the Prefetch Cache look up table*/
- //pthread_mutex_unlock(&pflookup.lock);
- } else if(buffer[index] == OBJECT_NOT_FOUND) {
- /* Increment it to get the object */
- /* TODO: For each object not found query DHT for new location and retrieve the object */
- index += sizeof(char);
- memcpy(&oid, buffer + index, sizeof(unsigned int));
- index += sizeof(unsigned int);
- /* Throw an error */
- printf("OBJECT NOT FOUND.... THIS SHOULD NOT HAPPEN...TERMINATE PROGRAM\n");
- exit(-1);
- } else {
- printf("Error in decoding the index value %s, %d\n",__FILE__, __LINE__);
- return;
- }
- }
-
- i++;
- }
- } else
- printf("Error in receving response for prefetch request %s, %d\n",__FILE__, __LINE__);
- return;
+ return;
}
-unsigned short getObjType(unsigned int oid)
-{
- objheader_t *objheader;
- unsigned short numoffsets = 0;
+int findHost(unsigned int hostIp) {
+ int i;
+ for (i = 0; i < numHostsInSystem; i++)
+ if (hostIpAddrs[i] == hostIp)
+ return i;
- if ((objheader = (objheader_t *) mhashSearch(oid)) == NULL)
- {
- if ((objheader = (objheader_t *) prehashSearch(oid)) == NULL)
- {
- prefetch(1, &oid, &numoffsets, NULL);
- pthread_mutex_lock(&pflookup.lock);
- while ((objheader = (objheader_t *) prehashSearch(oid)) == NULL)
- {
- pthread_cond_wait(&pflookup.cond, &pflookup.lock);
- }
- pthread_mutex_unlock(&pflookup.lock);
- }
- }
-
- return TYPE(objheader);
+ //not found
+ return -1;
}
-int startRemoteThread(unsigned int oid, unsigned int mid)
-{
- int sock;
- struct sockaddr_in remoteAddr;
- char msg[1 + sizeof(unsigned int)];
- int bytesSent;
- int status;
+/* This function sends notification request per thread waiting on object(s) whose version
+ * changes */
+int reqNotify(unsigned int *oidarry, unsigned short *versionarry, unsigned int numoid) {
+ int sock,i;
+ objheader_t *objheader;
+ struct sockaddr_in remoteAddr;
+ char msg[1 + numoid * (sizeof(unsigned short) + sizeof(unsigned int)) + 3 * sizeof(unsigned int)];
+ char *ptr;
+ //int bytesSent;
+ int status, size;
+ unsigned short version;
+ unsigned int oid,mid;
+ static unsigned int threadid = 0;
+ pthread_mutex_t threadnotify = PTHREAD_MUTEX_INITIALIZER; //Lock and condition var for threadjoin and notification
+ pthread_cond_t threadcond = PTHREAD_COND_INITIALIZER;
+ notifydata_t *ndata;
+
+ oid = oidarry[0];
+ if((mid = lhashSearch(oid)) == 0) {
+ printf("Error: %s() No such machine found for oid =%x\n",__func__, oid);
+ return;
+ }
- if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
- {
- perror("startRemoteThread():socket()");
- return -1;
- }
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ perror("reqNotify():socket()");
+ return -1;
+ }
- bzero(&remoteAddr, sizeof(remoteAddr));
- remoteAddr.sin_family = AF_INET;
- remoteAddr.sin_port = htons(LISTEN_PORT);
- remoteAddr.sin_addr.s_addr = htonl(mid);
-
- if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0)
- {
- printf("startRemoteThread():error %d connecting to %s:%d\n", errno,
- inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
- status = -1;
- }
- else
- {
- msg[0] = START_REMOTE_THREAD;
- memcpy(&msg[1], &oid, sizeof(unsigned int));
-
- bytesSent = send(sock, msg, 1 + sizeof(unsigned int), 0);
- if (bytesSent < 0)
- {
- perror("startRemoteThread():send()");
- status = -1;
- }
- else if (bytesSent != 1 + sizeof(unsigned int))
- {
- printf("startRemoteThread(): error, sent %d bytes\n", bytesSent);
- status = -1;
- }
- else
- {
- status = 0;
- }
- }
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
- close(sock);
- return status;
-}
+ /* Generate unique threadid */
+ threadid++;
-//TODO: when reusing oids, make sure they are not already in use!
-unsigned int getNewOID(void) {
- static unsigned int id = 0xFFFFFFFF;
-
- id += 2;
- if (id > oidMax || id < oidMin)
- {
- id = (oidMin | 1);
- }
- return id;
-}
+ /* Save threadid, numoid, oidarray, versionarray, pthread_cond_variable for later processing */
+ if((ndata = calloc(1, sizeof(notifydata_t))) == NULL) {
+ printf("Calloc Error %s, %d\n", __FILE__, __LINE__);
+ return -1;
+ }
+ ndata->numoid = numoid;
+ ndata->threadid = threadid;
+ ndata->oidarry = oidarry;
+ ndata->versionarry = versionarry;
+ ndata->threadcond = threadcond;
+ ndata->threadnotify = threadnotify;
+ if((status = notifyhashInsert(threadid, ndata)) != 0) {
+ printf("reqNotify(): Insert into notify hash table not successful %s, %d\n", __FILE__, __LINE__);
+ free(ndata);
+ return -1;
+ }
-int processConfigFile()
-{
- FILE *configFile;
- const int maxLineLength = 200;
- char lineBuffer[maxLineLength];
- char *token;
- const char *delimiters = " \t\n";
- char *commentBegin;
- in_addr_t tmpAddr;
-
- configFile = fopen(CONFIG_FILENAME, "r");
- if (configFile == NULL)
- {
- printf("error opening %s:\n", CONFIG_FILENAME);
- perror("");
- return -1;
- }
+ /* Send number of oids, oidarry, version array, machine id and threadid */
+ if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
+ printf("reqNotify():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ free(ndata);
+ return -1;
+ } else {
+ msg[0] = THREAD_NOTIFY_REQUEST;
+ *((unsigned int *)(&msg[1])) = numoid;
+ /* Send array of oids */
+ size = sizeof(unsigned int);
+
+ for(i = 0;i < numoid; i++) {
+ oid = oidarry[i];
+ *((unsigned int *)(&msg[1] + size)) = oid;
+ size += sizeof(unsigned int);
+ }
+
+ /* Send array of version */
+ for(i = 0;i < numoid; i++) {
+ version = versionarry[i];
+ *((unsigned short *)(&msg[1] + size)) = version;
+ size += sizeof(unsigned short);
+ }
+
+ *((unsigned int *)(&msg[1] + size)) = myIpAddr; size += sizeof(unsigned int);
+ *((unsigned int *)(&msg[1] + size)) = threadid;
+ pthread_mutex_lock(&(ndata->threadnotify));
+ size = 1 + numoid * (sizeof(unsigned int) + sizeof(unsigned short)) + 3 * sizeof(unsigned int);
+ send_data(sock, msg, size);
+ pthread_cond_wait(&(ndata->threadcond), &(ndata->threadnotify));
+ pthread_mutex_unlock(&(ndata->threadnotify));
+ }
- numHostsInSystem = 0;
- sizeOfHostArray = 8;
- hostIpAddrs = calloc(sizeOfHostArray, sizeof(unsigned int));
-
- while(fgets(lineBuffer, maxLineLength, configFile) != NULL)
- {
- commentBegin = strchr(lineBuffer, '#');
- if (commentBegin != NULL)
- *commentBegin = '\0';
- token = strtok(lineBuffer, delimiters);
- while (token != NULL)
- {
- tmpAddr = inet_addr(token);
- if ((int)tmpAddr == -1)
- {
- printf("error in %s: bad token:%s\n", CONFIG_FILENAME, token);
- fclose(configFile);
- return -1;
- }
- else
- addHost(htonl(tmpAddr));
- token = strtok(NULL, delimiters);
- }
- }
+ pthread_cond_destroy(&threadcond);
+ pthread_mutex_destroy(&threadnotify);
+ free(ndata);
+ close(sock);
+ return status;
+}
- fclose(configFile);
-
- if (numHostsInSystem < 1)
- {
- printf("error in %s: no IP Adresses found\n", CONFIG_FILENAME);
- return -1;
+void threadNotify(unsigned int oid, unsigned short version, unsigned int tid) {
+ notifydata_t *ndata;
+ int i, objIsFound = 0, index;
+ void *ptr;
+
+ //Look up the tid and call the corresponding pthread_cond_signal
+ if((ndata = notifyhashSearch(tid)) == NULL) {
+ printf("threadnotify(): No such threadid is present %s, %d\n", __FILE__, __LINE__);
+ return;
+ } else {
+ for(i = 0; i < ndata->numoid; i++) {
+ if(ndata->oidarry[i] == oid) {
+ objIsFound = 1;
+ index = i;
+ }
+ }
+ if(objIsFound == 0) {
+ printf("threadNotify(): Oid not found %s, %d\n", __FILE__, __LINE__);
+ return;
+ } else {
+ if(version <= ndata->versionarry[index]) {
+ printf("threadNotify(): New version %d has not changed since last version for oid = %d, %s, %d\n", version, oid, __FILE__, __LINE__);
+ return;
+ } else {
+#ifdef CACHE
+ /* Clear from prefetch cache and free thread related data structure */
+ if((ptr = prehashSearch(oid)) != NULL) {
+ prehashRemove(oid);
}
-#ifdef MAC
- myIpAddr = getMyIpAddr("en1");
-#else
- myIpAddr = getMyIpAddr("eth0");
#endif
- myIndexInHostArray = findHost(myIpAddr);
- if (myIndexInHostArray == -1)
- {
- printf("error in %s: IP Address of eth0 not found\n", CONFIG_FILENAME);
- return -1;
- }
- oidsPerBlock = (0xFFFFFFFF / numHostsInSystem) + 1;
- oidMin = oidsPerBlock * myIndexInHostArray;
- if (myIndexInHostArray == numHostsInSystem - 1)
- oidMax = 0xFFFFFFFF;
- else
- oidMax = oidsPerBlock * (myIndexInHostArray + 1) - 1;
+ pthread_mutex_lock(&(ndata->threadnotify));
+ pthread_cond_signal(&(ndata->threadcond));
+ pthread_mutex_unlock(&(ndata->threadnotify));
+ }
+ }
+ }
+ return;
+}
- return 0;
+int notifyAll(threadlist_t **head, unsigned int oid, unsigned int version) {
+ threadlist_t *ptr;
+ unsigned int mid;
+ struct sockaddr_in remoteAddr;
+ char msg[1 + sizeof(unsigned short) + 2*sizeof(unsigned int)];
+ int sock, status, size;
+ //int bytesSent;
+
+ while(*head != NULL) {
+ ptr = *head;
+ mid = ptr->mid;
+ //create a socket connection to that machine
+ if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ perror("notifyAll():socket()");
+ return -1;
+ }
+
+ bzero(&remoteAddr, sizeof(remoteAddr));
+ remoteAddr.sin_family = AF_INET;
+ remoteAddr.sin_port = htons(LISTEN_PORT);
+ remoteAddr.sin_addr.s_addr = htonl(mid);
+ //send Thread Notify response and threadid to that machine
+ if (connect(sock, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
+ printf("notifyAll():error %d connecting to %s:%d\n", errno,
+ inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
+ fflush(stdout);
+ status = -1;
+ } else {
+ bzero(msg, (1+sizeof(unsigned short) + 2*sizeof(unsigned int)));
+ msg[0] = THREAD_NOTIFY_RESPONSE;
+ *((unsigned int *)&msg[1]) = oid;
+ size = sizeof(unsigned int);
+ *((unsigned short *)(&msg[1]+ size)) = version;
+ size+= sizeof(unsigned short);
+ *((unsigned int *)(&msg[1]+ size)) = ptr->threadid;
+
+ size = 1 + 2*sizeof(unsigned int) + sizeof(unsigned short);
+ send_data(sock, msg, size);
+ }
+ //close socket
+ close(sock);
+ // Update head
+ *head = ptr->next;
+ free(ptr);
+ }
+ return status;
}
-void addHost(unsigned int hostIp)
-{
- unsigned int *tmpArray;
+void transAbort() {
+#ifdef ABORTREADERS
+ removetransactionhash();
+#endif
+ objstrDelete(t_cache);
+ t_chashDelete();
+}
- if (findHost(hostIp) != -1)
- return;
+/* This function inserts necessary information into
+ * a machine pile data structure */
+plistnode_t *pInsert(plistnode_t *pile, objheader_t *headeraddr, unsigned int mid, int num_objs) {
+ plistnode_t *ptr, *tmp;
+ int found = 0, offset = 0;
+
+ tmp = pile;
+ //Add oid into a machine that is already present in the pile linked list structure
+ while(tmp != NULL) {
+ if (tmp->mid == mid) {
+ int tmpsize;
+
+ if (STATUS(headeraddr) & NEW) {
+ tmp->oidcreated[tmp->numcreated] = OID(headeraddr);
+ tmp->numcreated++;
+ GETSIZE(tmpsize, headeraddr);
+ tmp->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else if (STATUS(headeraddr) & DIRTY) {
+ tmp->oidmod[tmp->nummod] = OID(headeraddr);
+ tmp->nummod++;
+ GETSIZE(tmpsize, headeraddr);
+ tmp->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else {
+ offset = (sizeof(unsigned int) + sizeof(short)) * tmp->numread;
+ *((unsigned int *)(((char *)tmp->objread) + offset))=OID(headeraddr);
+ offset += sizeof(unsigned int);
+ *((short *)(((char *)tmp->objread) + offset)) = headeraddr->version;
+ tmp->numread++;
+ }
+ found = 1;
+ break;
+ }
+ tmp = tmp->next;
+ }
+ //Add oid for any new machine
+ if (!found) {
+ int tmpsize;
+ if((ptr = pCreate(num_objs)) == NULL) {
+ return NULL;
+ }
+ ptr->mid = mid;
+ if (STATUS(headeraddr) & NEW) {
+ ptr->oidcreated[ptr->numcreated] = OID(headeraddr);
+ ptr->numcreated++;
+ GETSIZE(tmpsize, headeraddr);
+ ptr->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else if (STATUS(headeraddr) & DIRTY) {
+ ptr->oidmod[ptr->nummod] = OID(headeraddr);
+ ptr->nummod++;
+ GETSIZE(tmpsize, headeraddr);
+ ptr->sum_bytes += sizeof(objheader_t) + tmpsize;
+ } else {
+ *((unsigned int *)ptr->objread)=OID(headeraddr);
+ offset = sizeof(unsigned int);
+ *((short *)(((char *)ptr->objread) + offset)) = headeraddr->version;
+ ptr->numread++;
+ }
+ ptr->next = pile;
+ pile = ptr;
+ }
- if (numHostsInSystem == sizeOfHostArray)
- {
- tmpArray = calloc(sizeOfHostArray * 2, sizeof(unsigned int));
- memcpy(tmpArray, hostIpAddrs, sizeof(unsigned int) * numHostsInSystem);
- free(hostIpAddrs);
- hostIpAddrs = tmpArray;
- }
+ /* Clear Flags */
+ STATUS(headeraddr) =0;
- hostIpAddrs[numHostsInSystem++] = hostIp;
- return;
+ return pile;
}
-int findHost(unsigned int hostIp)
-{
- int i;
- for (i = 0; i < numHostsInSystem; i++)
- if (hostIpAddrs[i] == hostIp)
- return i;
-
- //not found
- return -1;
+plistnode_t *sortPiles(plistnode_t *pileptr) {
+ plistnode_t *head, *ptr, *tail;
+ head = pileptr;
+ ptr = pileptr;
+ /* Get tail pointer */
+ while(ptr!= NULL) {
+ tail = ptr;
+ ptr = ptr->next;
+ }
+ ptr = pileptr;
+ plistnode_t *prev = pileptr;
+ /* Arrange local machine processing at the end of the pile list */
+ while(ptr != NULL) {
+ if(ptr != tail) {
+ if(ptr->mid == myIpAddr && (prev != pileptr)) {
+ prev->next = ptr->next;
+ ptr->next = NULL;
+ tail->next = ptr;
+ return pileptr;
+ }
+ if((ptr->mid == myIpAddr) && (prev == pileptr)) {
+ prev = ptr->next;
+ ptr->next = NULL;
+ tail->next = ptr;
+ return prev;
+ }
+ prev = ptr;
+ }
+ ptr = ptr->next;
+ }
+ return pileptr;
}
-
projects / IRC.git / blobdiff