Messages in this thread | | | Date | Wed, 21 Dec 2011 14:11:17 -0500 | From | Vivek Goyal <> | Subject | Re: [PATCH 0/6][RFC] virtio-blk: Change I/O path from request to BIO |
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On Wed, Dec 21, 2011 at 10:00:48AM +0900, Minchan Kim wrote: > This patch is follow-up of Christohp Hellwig's work > [RFC: ->make_request support for virtio-blk]. > http://thread.gmane.org/gmane.linux.kernel/1199763 > > Quote from hch > "This patchset allows the virtio-blk driver to support much higher IOP > rates which can be driven out of modern PCI-e flash devices. At this > point it really is just a RFC due to various issues." > > I fixed race bug and add batch I/O for enhancing sequential I/O, > FLUSH/FUA emulation. > > I tested this patch on fusion I/O device by aio-stress. > Result is following as. > > Benchmark : aio-stress (64 thread, test file size 512M, 8K io per IO, O_DIRECT write) > Environment: 8 socket - 8 core, 2533.372Hz, Fusion IO 320G storage > Test repeated by 20 times > Guest I/O scheduler : CFQ > Host I/O scheduler : NOOP
May be using deadline or noop in guest is better to benchmark against PCI-E based flash.
Thanks Vivek
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