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Re: [Qemu-devel] question about performance of dataplane
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] question about performance of dataplane |
Date: |
Mon, 8 Apr 2013 13:08:41 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sun, Apr 07, 2013 at 09:05:47AM -0500, Anthony Liguori wrote:
> Zhangleiqiang <address@hidden> writes:
>
> > Hi, Stefan:
> >
> > I have done some testing to compare the performance of dataplane and
> > non-dataplane. But the result did not meet my expectations, the
> > performance of disk with dataplane enabled did not have advantage over
> > non-dataplane.
> >
> > The following contains the environment info and testing results.
> > Does my testing method or testing environment have something wrong ? Could
> > you give me some advice? I can provide more information if need.
> >
> >
> > 1. Environment:
> > a). Qemu 1.4 master branch
> > b). kernel: 3.5.0-2.fc17.x86_64
> > c). virtual disks location: the same local SATA harddisk
> > with ext4 fs
>
> I doubt you'll see any performance difference with a single SATA drive.
> There's no real parallelism possible as you have exactly one spindle
> available.
Sorry for the delay, catching up on emails after my Easter vacation.
I agree with Anthony here. It seems your benchmark configuration is
bottlenecked below the point where data plane makes a difference.
Stefan
- Re: [Qemu-devel] 答复: 答复: question about pe rformance of dataplane, (continued)
- Re: [Qemu-devel] 答复: 答复: question about pe rformance of dataplane, Abel Gordon, 2013/04/07
- [Qemu-devel] 答复: 答复: 答复: question a bout performance of dataplane, Zhangleiqiang, 2013/04/07
- Re: [Qemu-devel] 答复: 答复: 答复: question a bout performance of dataplane, Abel Gordon, 2013/04/07
- Message not available
- Re: [Qemu-devel] 答复: 答复: 答复: question abo ut performance of dataplane, Abel Gordon, 2013/04/07
- [Qemu-devel] 答复: 答复: 答复: 答复: quest ion about performance of dataplane, Zhangleiqiang, 2013/04/08
- Re: [Qemu-devel] 答复: 答复: 答复: 答复: quest ion about performance of dataplane, Abel Gordon, 2013/04/08
- Re: [Qemu-devel] 答复: 答复: 答复: 答复: quest ion about performance of dataplane, Zhangleiqiang, 2013/04/08
- Re: [Qemu-devel] 答复: 答复: 答复: 答复: quest ion about performance of dataplane, Abel Gordon, 2013/04/08
Re: [Qemu-devel] question about performance of dataplane, Anthony Liguori, 2013/04/07