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optimizations to mpmc-queue yield placement
[model-checker-benchmarks.git]
/
mpmc-queue
/
mpmc-queue.h
diff --git
a/mpmc-queue/mpmc-queue.h
b/mpmc-queue/mpmc-queue.h
index f73ab992e0b1fcfbbf962b067c204cdb75b9578f..918415fa99278e0a8cc3d47622f84de00749445c 100644
(file)
--- a/
mpmc-queue/mpmc-queue.h
+++ b/
mpmc-queue/mpmc-queue.h
@@
-38,12
+38,14
@@
public:
if ( m_rdwr.compare_exchange_weak(rdwr,rdwr+(1<<16),mo_acq_rel) )
break;
if ( m_rdwr.compare_exchange_weak(rdwr,rdwr+(1<<16),mo_acq_rel) )
break;
+ else
+ thrd_yield();
}
// (*1)
rl::backoff bo;
while ( (m_written.load(mo_acquire) & 0xFFFF) != wr ) {
}
// (*1)
rl::backoff bo;
while ( (m_written.load(mo_acquire) & 0xFFFF) != wr ) {
-
bo.
yield();
+
thrd_
yield();
}
t_element * p = & ( m_array[ rd % t_size ] );
}
t_element * p = & ( m_array[ rd % t_size ] );
@@
-69,12
+71,14
@@
public:
if ( m_rdwr.compare_exchange_weak(rdwr,(rd<<16) | ((wr+1)&0xFFFF),mo_acq_rel) )
break;
if ( m_rdwr.compare_exchange_weak(rdwr,(rd<<16) | ((wr+1)&0xFFFF),mo_acq_rel) )
break;
+ else
+ thrd_yield();
}
// (*1)
rl::backoff bo;
while ( (m_read.load(mo_acquire) & 0xFFFF) != rd ) {
}
// (*1)
rl::backoff bo;
while ( (m_read.load(mo_acquire) & 0xFFFF) != rd ) {
-
bo.
yield();
+
thrd_
yield();
}
t_element * p = & ( m_array[ wr % t_size ] );
}
t_element * p = & ( m_array[ wr % t_size ] );