From: Asias He <asias@redhat.com> To: Stefan Hajnoczi <stefanha@gmail.com> Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH v2 0/3] Improve virtio-blk performance Date: Mon, 18 Jun 2012 17:39:10 +0800 [thread overview] Message-ID: <4FDEF73E.3010501@redhat.com> (raw) In-Reply-To: <CAJSP0QXOn-5Krm6hSMmm=zRYkG43k9F4Xe6P+ENMFtgMhTupFA@mail.gmail.com> On 06/18/2012 05:14 PM, Stefan Hajnoczi wrote: > On Mon, Jun 18, 2012 at 7:53 AM, Asias He <asias@redhat.com> wrote: >> Fio test shows it gives, 28%, 24%, 21%, 16% IOPS boost and 32%, 17%, 21%, 16% >> latency improvement for sequential read/write, random read/write respectively. > > Sounds great. What storage configuration did you use (single spinning > disk, SSD, storage array) and are these numbers for parallel I/O or > sequential I/O? I used ramdisk as the backend storage. > What changed since Minchan worked on this? I remember he wasn't > satisfied that this was a clear win. Your numbers are strong so > either you fixed something important or you are looking at different > benchmark configurations. I am using kvm tool instead qemu. He wasn't satisfied the poor sequential performance. I removed the plug and unplug operation and bio completion batching. You can grab Michan's patch and make a diff to see the details. Here is the fio's config file. [global] exec_prerun="echo 3 > /proc/sys/vm/drop_caches" group_reporting norandommap ioscheduler=noop thread bs=512 size=4MB direct=1 filename=/dev/vdb numjobs=256 ioengine=aio iodepth=64 loops=3 [seq-read] stonewall rw=read [seq-write] stonewall rw=write [rnd-read] stonewall rw=randread [rnd-write] stonewall rw=randwrite -- Asias
WARNING: multiple messages have this Message-ID (diff)
From: Asias He <asias@redhat.com> To: Stefan Hajnoczi <stefanha@gmail.com> Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH v2 0/3] Improve virtio-blk performance Date: Mon, 18 Jun 2012 17:39:10 +0800 [thread overview] Message-ID: <4FDEF73E.3010501@redhat.com> (raw) In-Reply-To: <CAJSP0QXOn-5Krm6hSMmm=zRYkG43k9F4Xe6P+ENMFtgMhTupFA@mail.gmail.com> On 06/18/2012 05:14 PM, Stefan Hajnoczi wrote: > On Mon, Jun 18, 2012 at 7:53 AM, Asias He <asias@redhat.com> wrote: >> Fio test shows it gives, 28%, 24%, 21%, 16% IOPS boost and 32%, 17%, 21%, 16% >> latency improvement for sequential read/write, random read/write respectively. > > Sounds great. What storage configuration did you use (single spinning > disk, SSD, storage array) and are these numbers for parallel I/O or > sequential I/O? I used ramdisk as the backend storage. > What changed since Minchan worked on this? I remember he wasn't > satisfied that this was a clear win. Your numbers are strong so > either you fixed something important or you are looking at different > benchmark configurations. I am using kvm tool instead qemu. He wasn't satisfied the poor sequential performance. I removed the plug and unplug operation and bio completion batching. You can grab Michan's patch and make a diff to see the details. Here is the fio's config file. [global] exec_prerun="echo 3 > /proc/sys/vm/drop_caches" group_reporting norandommap ioscheduler=noop thread bs=512 size=4MB direct=1 filename=/dev/vdb numjobs=256 ioengine=aio iodepth=64 loops=3 [seq-read] stonewall rw=read [seq-write] stonewall rw=write [rnd-read] stonewall rw=randread [rnd-write] stonewall rw=randwrite -- Asias
next prev parent reply other threads:[~2012-06-18 9:37 UTC|newest] Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-06-18 6:53 [PATCH v2 0/3] Improve virtio-blk performance Asias He 2012-06-18 6:53 ` Asias He 2012-06-18 6:53 ` [PATCH 1/3] block: Introduce __blk_segment_map_sg() helper Asias He 2012-06-18 6:53 ` Asias He 2012-06-18 21:31 ` Tejun Heo 2012-06-18 21:31 ` Tejun Heo 2012-06-19 2:02 ` Asias He 2012-06-19 2:02 ` Asias He 2012-06-19 18:00 ` Tejun Heo 2012-06-19 18:00 ` Tejun Heo 2012-06-18 6:53 ` [PATCH v2 2/3] block: Add blk_bio_map_sg() helper Asias He 2012-06-18 6:53 ` Asias He 2012-06-18 6:53 ` [PATCH 3/3] virtio-blk: Add bio-based IO path for virtio-blk Asias He 2012-06-18 6:53 ` Asias He 2012-06-18 7:46 ` Rusty Russell 2012-06-18 7:46 ` Rusty Russell 2012-06-18 8:03 ` Asias He 2012-06-18 8:03 ` Asias He 2012-06-18 10:05 ` Rusty Russell 2012-06-18 10:05 ` Rusty Russell 2012-06-18 11:14 ` Dor Laor 2012-06-18 11:14 ` Dor Laor 2012-06-18 11:39 ` Sasha Levin 2012-06-18 11:39 ` Sasha Levin 2012-06-19 2:51 ` Asias He 2012-06-19 2:51 ` Asias He 2012-06-19 6:21 ` Dor Laor 2012-06-19 6:21 ` Dor Laor 2012-06-20 4:46 ` Asias He 2012-06-20 4:46 ` Asias He 2012-06-21 9:49 ` Dor Laor 2012-06-21 9:49 ` Dor Laor 2012-07-01 23:54 ` Rusty Russell 2012-07-02 2:45 ` Asias He 2012-07-02 2:45 ` Asias He 2012-07-02 6:41 ` Rusty Russell 2012-07-02 6:41 ` Rusty Russell 2012-07-03 0:39 ` Asias He 2012-07-03 0:39 ` Asias He 2012-07-04 2:40 ` Rusty Russell 2012-07-04 2:40 ` Rusty Russell 2012-07-06 1:03 ` Asias He 2012-07-06 1:03 ` Asias He 2012-07-03 13:31 ` Paolo Bonzini 2012-07-03 13:31 ` Paolo Bonzini 2012-07-03 14:02 ` Asias He 2012-07-03 14:02 ` Asias He 2012-07-01 23:54 ` Rusty Russell 2012-07-03 14:22 ` Ronen Hod 2012-07-03 14:22 ` Ronen Hod 2012-07-03 14:28 ` Dor Laor 2012-07-03 14:28 ` Dor Laor 2012-07-04 14:10 ` Paolo Bonzini 2012-07-04 14:10 ` Paolo Bonzini 2012-06-18 21:28 ` Tejun Heo 2012-06-18 21:28 ` Tejun Heo 2012-06-19 2:39 ` Asias He 2012-06-19 2:39 ` Asias He 2012-06-18 10:13 ` Michael S. Tsirkin 2012-06-18 10:13 ` Michael S. Tsirkin 2012-06-19 2:21 ` Asias He 2012-06-19 2:21 ` Asias He 2012-06-18 9:37 ` Stefan Hajnoczi 2012-06-18 9:37 ` Stefan Hajnoczi 2012-06-18 10:21 ` Michael S. Tsirkin 2012-06-18 10:21 ` Michael S. Tsirkin 2012-06-18 10:45 ` Stefan Hajnoczi 2012-06-18 10:45 ` Stefan Hajnoczi 2012-06-19 2:30 ` Asias He 2012-06-19 2:30 ` Asias He 2012-06-18 9:14 ` [PATCH v2 0/3] Improve virtio-blk performance Stefan Hajnoczi 2012-06-18 9:14 ` Stefan Hajnoczi 2012-06-18 9:39 ` Asias He [this message] 2012-06-18 9:39 ` Asias He 2012-06-18 10:58 ` Stefan Hajnoczi 2012-06-18 10:58 ` Stefan Hajnoczi 2012-06-19 4:24 ` Asias He 2012-06-19 4:24 ` Asias He 2012-06-19 10:14 ` Stefan Hajnoczi 2012-06-19 10:14 ` Stefan Hajnoczi
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