scsi: aacraid: Added 32 and 64 queue depth for arc natives (d58129c9) · Commits · 戴 / test

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>

drivers/scsi/aacraid/aacraid.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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)

drivers/scsi/aacraid/linit.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -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:

Admin message