Messages in this thread | | | From | Asias He <> | Date | Wed, 7 Nov 2012 20:23:28 +0800 | Subject | Re: [PATCH 0/5] virtio-scsi: create a separate workqueue |
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On Wed, Nov 7, 2012 at 6:18 PM, Wanlong Gao <gaowanlong@cn.fujitsu.com> 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?
> 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@parallels.com> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: Rusty Russell <rusty@rustcorp.com.au> > Cc: linux-scsi@vger.kernel.org > Cc: kvm@vger.kernel.org > 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@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
-- Asias He
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