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scsi: aacraid: Added 32 and 64 queue depth for arc natives

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The qd for ARC Native disks is calculated by dividing the max IO 1024
by the number of disks or 256 which ever is lower. This causes poor
disk IO performance.

The fix is set the qd based on the type of disk (SAS - 64 and SATA -
32).

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Raghava Aditya Renukunta 2017-05-10 09:39:37 -07:00 committed by Martin K. Petersen
parent 8105d39d0e
commit d58129c96b
2 changed files with 12 additions and 0 deletions
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1
drivers/scsi/aacraid/aacraid.h
View File

@ -415,6 +415,7 @@ struct aac_ciss_identify_pd {
* These macros convert from physical channels to virtual channels
*/
#define CONTAINER_CHANNEL (0)
#define NATIVE_CHANNEL (1)
#define CONTAINER_TO_CHANNEL(cont) (CONTAINER_CHANNEL)
#define CONTAINER_TO_ID(cont) (cont)
#define CONTAINER_TO_LUN(cont) (0)

11
drivers/scsi/aacraid/linit.c
View File

@ -466,6 +466,17 @@ static int aac_slave_configure(struct scsi_device *sdev)
++num_lsu;
depth = (host->can_queue - num_one) / num_lsu;
if (sdev_channel(sdev) != NATIVE_CHANNEL)
goto common_config;
/*
* Check if SATA drive
*/
if (strncmp(sdev->vendor, "ATA", 3) == 0)
depth = 32;
else
depth = 64;
}
common_config: