[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-24 Thread Michael S. Tsirkin
On Tue, Mar 23, 2010 at 12:55:07PM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 10:57:33AM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari Pulavarty wrote: Write Results:

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-24 Thread Michael S. Tsirkin
On Tue, Mar 23, 2010 at 12:55:07PM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 10:57:33AM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari Pulavarty wrote: Write Results:

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-24 Thread Badari Pulavarty
Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 12:55:07PM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 10:57:33AM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-24 Thread Michael S. Tsirkin
On Wed, Mar 24, 2010 at 10:58:50AM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 12:55:07PM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 10:57:33AM -0700, Badari Pulavarty wrote: Michael S. Tsirkin

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-23 Thread Michael S. Tsirkin
On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari Pulavarty wrote: Write Results: == I see degraded IO performance when doing sequential IO write tests with vhost-blk compared to virtio-blk. # time dd of=/dev/vda if=/dev/zero bs=2M oflag=direct I get ~110MB/sec with

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-23 Thread Badari Pulavarty
Michael S. Tsirkin wrote: On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari Pulavarty wrote: Write Results: == I see degraded IO performance when doing sequential IO write tests with vhost-blk compared to virtio-blk. # time dd of=/dev/vda if=/dev/zero bs=2M oflag=direct I get

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-23 Thread Badari Pulavarty
Michael S. Tsirkin wrote: On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari Pulavarty wrote: Write Results: == I see degraded IO performance when doing sequential IO write tests with vhost-blk compared to virtio-blk. # time dd of=/dev/vda if=/dev/zero bs=2M oflag=direct I get

[Qemu-devel] Re: [RFC] vhost-blk implementation

2010-03-23 Thread Badari Pulavarty
Michael S. Tsirkin wrote: On Tue, Mar 23, 2010 at 10:57:33AM -0700, Badari Pulavarty wrote: Michael S. Tsirkin wrote: On Mon, Mar 22, 2010 at 05:34:04PM -0700, Badari Pulavarty wrote: Write Results: == I see degraded IO performance when doing sequential IO write