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Re: [Qemu-devel] IO performance test on the tcm-vhost scsi
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] IO performance test on the tcm-vhost scsi |
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Date: |
Wed, 13 Jun 2012 11:35:09 +0100 |
On Wed, Jun 13, 2012 at 11:13 AM, mengcong <address@hidden> wrote:
> seq-read seq-write rand-read rand-write
> 8k 256k 8k 256k 8k 256k 8k 256k
> ----------------------------------------------------------------------------
> bare-metal 67951 69802 67064 67075 1758 29284 1969 26360
> tcm-vhost-iblock 61501 66575 51775 67872 1011 22533 1851 28216
> tcm-vhost-pscsi 66479 68191 50873 67547 1008 22523 1818 28304
> virtio-blk 26284 66737 23373 65735 1724 28962 1805 27774
> scsi-disk 36013 60289 46222 62527 1663 12992 1804 27670
[...]
> In tcm-vhost-iblock test, the emulate_write_cache attr was enabled.
> In virtio-blk test, cache=none,aio=native were set.
> In scsi-disk test, cache=none,aio=native were set, and LSI HBA was used.
If the LSI HBA was used then there are no benchmark results for
userspace virtio-scsi?
Stefan