Re: virtio performance issue

2008-09-17 Thread Mark McLoughlin
On Tue, 2008-09-16 at 22:24 +0300, Ben-Ami Yassour wrote: On Tue, 2008-09-16 at 09:16 -0500, Anthony Liguori wrote: Ben-Ami Yassour wrote: I am running virtio with the latest KVM code, and see a significant performance issue. Ping to the host (or any other close machine) reports a

Re: virtio performance issue

2008-09-17 Thread Ben-Ami Yassour
On Wed, 2008-09-17 at 11:49 +0100, Mark McLoughlin wrote: On Tue, 2008-09-16 at 22:24 +0300, Ben-Ami Yassour wrote: On Tue, 2008-09-16 at 09:16 -0500, Anthony Liguori wrote: Ben-Ami Yassour wrote: I am running virtio with the latest KVM code, and see a significant performance issue.

virtio performance issue

2008-09-16 Thread Ben-Ami Yassour
I am running virtio with the latest KVM code, and see a significant performance issue. Ping to the host (or any other close machine) reports a 4ms delay. In the same setup with an e1000 emulation (just changing model=virtio to model=e1000 in the KVM command line), ping reports 0.177ms delay.

Re: virtio performance issue

2008-09-16 Thread Anthony Liguori
Ben-Ami Yassour wrote: I am running virtio with the latest KVM code, and see a significant performance issue. Ping to the host (or any other close machine) reports a 4ms delay. What kvm version and what host kernel version? It's very easy to mistakenly compile qemu without GSO support

Re: virtio performance issue

2008-09-16 Thread Bernhard Schmidt
Ben-Ami Yassour [EMAIL PROTECTED] wrote: Hello Ben, I am running virtio with the latest KVM code, and see a significant performance issue. Ping to the host (or any other close machine) reports a 4ms delay. In the same setup with an e1000 emulation (just changing model=virtio to

Re: virtio performance issue

2008-09-16 Thread Ben-Ami Yassour
On Tue, 2008-09-16 at 09:16 -0500, Anthony Liguori wrote: Ben-Ami Yassour wrote: I am running virtio with the latest KVM code, and see a significant performance issue. Ping to the host (or any other close machine) reports a 4ms delay. What kvm version and what host kernel version?