[Spice-devel] Performance expectations

[Alon Levy]

On Tue, Feb 21, 2012 at 12:58:55PM -0700, Kai Meyer wrote:
> 
> 
> On 02/21/2012 10:57 AM, Alon Levy wrote:
> >On Tue, Feb 21, 2012 at 10:49:04AM -0700, Kai Meyer wrote:
> >>
> >>On 02/20/2012 05:19 AM, Yonit Halperin wrote:
> >>>Hi,
> >>>On 02/15/2012 06:22 PM, Kai Meyer wrote:
> >>>>
> >>>>On 02/15/2012 05:19 AM, Yonit Halperin wrote:
> >>>>>On 02/15/2012 01:16 AM, Kai Meyer wrote:
> >>>>>>Help me set my expectations straight. Should I be able to
> >>>>>>use spice from
> >>>>>>inside a VM on my local machine to view video streaming services like
> >>>>>>Youtube, Hulu, and Netflix? I have RHEL 6 Workstation for my host, and
> >>>>>>Win7 Pro as my guest. I've installed the qxl driver in the
> >>>>>>VM, and used
> >>>>>>Virt-manager to configure the VM to use Spice as my Display and Video
> >>>>>>Model is qxl.
> >>>>>>
> >>>>>You should be able to do it. But it depends on you network conditions
> >>>>>(client to host).
> >>>>>
> >>>>>Yonit.
> >>>>>>-Kai Meyer
> >>>>>>_______________________________________________
> >>>>>>Spice-devel mailing list
> >>>>>>Spice-devel at lists.freedesktop.org
> >>>>>>http://lists.freedesktop.org/mailman/listinfo/spice-devel
> >>>>This is a VM on my local machine, so I'm effectively connecting to
> >>>>localhost. Network conditions should be the least concern, yet playback
> >>>>is terrible.
> >>>>
> >>>Which spice client do you run?
> >>>Another possible reason for the slow playback is that Rhel 6
> >>>doesn't have libjpeg-turbo.
> >>>
> >>>Yonit.
> >>>>-Kai Meyer
> >>I'm using the spice client that comes in the default RHEL 6
> >>repositories. libjpeg-turbo is not installed as a system library
> >>anywhere I can find. If I am cpu-bound, it seems like it would be
> >>the qemu process running the VM. My spicec process does not utilize
> >>more than 50% of a cpu (as reported by top).
> >How many cores do you have? if 2, then 50% *is* cpu bound. You can use
> >htop for better reporting.
> >
> >>_______________________________________________
> >>Spice-devel mailing list
> >>Spice-devel at lists.freedesktop.org
> >>http://lists.freedesktop.org/mailman/listinfo/spice-devel
> top's CPU% for a process is percent of a core, so processes can take
> up to 200% on a dual-core machine. For further clarification, I
> typically see 15%-30% cpu utilization on the spicec process, and
> anywhere from 80%-170% CPU utilization on the qemu process running
> the VM (the VM has access to 2 of my 8 cores).
> 

Right, I always get this confused. Sorry for the noise.

> -Kai Meyer
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