Question on qemu-kvm 1.0

Question on qemu-kvm 1.0

[Al Patel]

Hi ,

We have been using qemu/kvm 0.12.5 (unchanged with stock kernel 2.6.32).

I just upgraded to qemu/kvm-1.0 and see noticable difference in packet I/O.

I want to understand the enhancements in 1.0 that leads to better performance.

Can you give me some pointers?

Off the bat I see new event code. From observation, I see that the
qemu-kvm process is
taking a whole lot less CPU.

Thanks
/a

Re: Question on qemu-kvm 1.0

[Al Patel]

Side note: I am not using vhost-net yet. I am reading from the blogs
that vhost-net gives much better performance.
I am putting another system up with vhost-net support to measure this.

Appreciate the pointers for previous question.

/a

On Mon, Mar 5, 2012 at 11:17 AM, Al Patel <alps.oss@gmail.com> wrote:
> Hi ,
>
> We have been using qemu/kvm 0.12.5 (unchanged with stock kernel 2.6.32).
>
> I just upgraded to qemu/kvm-1.0 and see noticable difference in packet I/O.
>
> I want to understand the enhancements in 1.0 that leads to better performance.
>
> Can you give me some pointers?
>
> Off the bat I see new event code. From observation, I see that the
> qemu-kvm process is
> taking a whole lot less CPU.
>
> Thanks
> /a

[Qemu-devel] Fwd: Question on qemu-kvm 1.0

[Al Patel]

---------- Forwarded message ----------
From: Al Patel <alps.oss@gmail.com>
Date: Mon, Mar 5, 2012 at 11:17 AM
Subject: Question on qemu-kvm 1.0
To: kvm@vger.kernel.org, mst@redhat.com


Hi ,

We have been using qemu/kvm 0.12.5 (unchanged with stock kernel 2.6.32).

I just upgraded to qemu/kvm-1.0 and see noticable difference in packet I/O.

I want to understand the enhancements in 1.0 that leads to better performance.

Can you give me some pointers?

Off the bat I see new event code. From observation, I see that the
qemu-kvm process is
taking a whole lot less CPU.

Thanks
/a

[Qemu-devel] Fwd: Question on qemu-kvm 1.0

[Al Patel]

---------- Forwarded message ----------
From: Al Patel <alps.oss@gmail.com>
Date: Mon, Mar 5, 2012 at 11:19 AM
Subject: Re: Question on qemu-kvm 1.0
To: kvm@vger.kernel.org, mst@redhat.com


Side note: I am not using vhost-net yet. I am reading from the blogs
that vhost-net gives much better performance.
I am putting another system up with vhost-net support to measure this.

Appreciate the pointers for previous question.

/a

On Mon, Mar 5, 2012 at 11:17 AM, Al Patel <alps.oss@gmail.com> wrote:
> Hi ,
>
> We have been using qemu/kvm 0.12.5 (unchanged with stock kernel 2.6.32).
>
> I just upgraded to qemu/kvm-1.0 and see noticable difference in packet I/O.
>
> I want to understand the enhancements in 1.0 that leads to better performance.
>
> Can you give me some pointers?
>
> Off the bat I see new event code. From observation, I see that the
> qemu-kvm process is
> taking a whole lot less CPU.
>
> Thanks
> /a