cxlflash: Increase cmd_per_lun for better throughput
authorManoj N. Kumar <manoj@linux.vnet.ibm.com>
Fri, 4 Mar 2016 21:55:20 +0000 (15:55 -0600)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 26 Mar 2017 10:13:17 +0000 (12:13 +0200)
commit12e1a3cd11ea373143e957cf9698a26a4e43f4a6
tree012c68f3212420b222b57e98b796a26efc3d0bce
parentf8c07cbc2e72a7e26bff8c5823f6e045eeeb4e16
cxlflash: Increase cmd_per_lun for better throughput

commit 83430833b4d4a9c9b23964babbeb1f36450f8136 upstream.

With the current value of cmd_per_lun at 16, the throughput
over a single adapter is limited to around 150kIOPS.

Increase the value of cmd_per_lun to 256 to improve
throughput. With this change a single adapter is able to
attain close to the maximum throughput (380kIOPS).
Also change the number of RRQ entries that can be queued.

Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/scsi/cxlflash/common.h
drivers/scsi/cxlflash/main.c