On 11/07/2012 08:23 PM, Asias He wrote: > On Wed, Nov 7, 2012 at 6:18 PM, Wanlong Gao <gaowanlong@xxxxxxxxxxxxxx> wrote: >> patch 1-3,5 are some cleanups. >> patch 4: create a separate work queue for virtio-scsi >> to improve the performance, I tested with tmpfs backed >> disk, the config file is like below, >> [global] >> bsrange=4k-64k >> ioengine=libaio >> direct=1 >> iodepth=4 >> loops=10 >> size=64M >> >> Before: >> Disk stats (read/write): >> sda: ios=6547/5275, merge=37/39, ticks=3144/2645, in_queue=5780, util=81.62% >> sdb: ios=6542/5277, merge=54/59, ticks=3234/3143, in_queue=6364, util=84.50% >> sdc: ios=6532/5244, merge=65/62, ticks=3440/3076, in_queue=6505, util=86.83% > > The result is about the disk stat. Can you please post the iops and > the bw instead? Sure, before: write: io=589788KB, bw=122211KB/s, iops=3584 , runt= 4826msec bw (KB/s) : min=24208, max=116272, per=57.47%, avg=70236.40, stdev=35496.33 WRITE: io=589788KB, aggrb=122210KB/s, minb=122210KB/s, maxb=122210KB/s, mint=4826msec, maxt=4826msec after: write: io=589788KB, bw=124244KB/s, iops=3530 , runt= 4747msec bw (KB/s) : min=63496, max=117943, per=73.39%, avg=91184.20, stdev=20062.42 WRITE: io=589788KB, aggrb=124244KB/s, minb=124244KB/s, maxb=124244KB/s, mint=4747msec, maxt=4747msec Thanks, Wanlong Gao > >> After: >> Disk stats (read/write): >> sda: ios=6349/5318, merge=77/89, ticks=4820/3169, in_queue=7991, util=90.62% >> sdb: ios=6364/5358, merge=39/53, ticks=3810/2816, in_queue=6615, util=84.63% >> sdc: ios=6458/5352, merge=74/47, ticks=4425/3048, in_queue=7459, util=88.41% >> >> >> Wanlong Gao (5): >> virtio-scsi: remove the useless assignment >> virtio-scsi: remove the needless variable gfp_mask >> virtio-scsi: use pr_err instead of printk >> virtio-scsi: create a separate work queue for virtio-scsi >> virtio-scsi: tidy up the goto label in init() >> >> >> >> Cc: James E.J. Bottomley <JBottomley@xxxxxxxxxxxxx> >> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> >> Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx> >> Cc: linux-scsi@xxxxxxxxxxxxxxx >> Cc: kvm@xxxxxxxxxxxxxxx >> drivers/scsi/virtio_scsi.c | 43 +++++++++++++++++++++++-------------------- >> 1 file changed, 23 insertions(+), 20 deletions(-) >> >> -- >> 1.8.0 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
