Re: Some performance tunning opportunity of cheese

[Stefan Kost <ensonic hora-obscura de>]

Zhao, Halley wrote:
>
> Re-send the image with smaller size.
>

Unfortunately this is now unreadable. Could you mail me the image in
full resolution or file a bug against gstreamer in gnome bugzilla and
attach the image there?

Stefan

> -----Original Message-----
> From: Zhao, Halley
> Sent: 2010年2月2日 17:25
> To: Stefan Kost
> Cc: 'cheese-list gnome org'; Holmes, Iain; Lespiau, Damien; Rob
> Bradford; Guo, Young
> Subject: RE: Some performance tunning opportunity of cheese
>
> Here is a snapshot of vtune page for audio only recording.
>
> -----Original Message-----
>
> From: Stefan Kost [mailto:ensonic hora-obscura de]
>
> Sent: 2010年2月2日 5:57
>
> To: Zhao, Halley
>
> Cc: 'cheese-list gnome org'; Holmes, Iain; Lespiau, Damien; Rob
> Bradford; Guo, Young
>
> Subject: Re: Some performance tunning opportunity of cheese
>
> Am 01.02.2010 05:39, schrieb Zhao, Halley:
>
> > For alsa/pulse.
>
> > I tried VTune before, and found pulse play a lot in recording.
>
> > I will try oprofile if you think it is required.
>
> Please use whatever tool you know best. Using vtune is fine, but then
> we would
>
> need to know more dettails. Can you send vtune reports. Maybe those
> can help us
>
> to improve the performance where you found the hotspots.
>
> Stefan
>
> >
>
> > -----Original Message-----
>
> > From: Stefan Kost [mailto:ensonic hora-obscura de]
>
> > Sent: 2010年1月29日 21:28
>
> > To: Zhao, Halley
>
> > Cc: 'cheese-list gnome org'; Holmes, Iain; Lespiau, Damien; Rob
> Bradford; Guo, Young
>
> > Subject: Re: Some performance tunning opportunity of cheese
>
> >
>
> > Am 29.01.2010 08:04, schrieb Zhao, Halley:
>
> >> Hi All:
>
> >> I created one patch for your basic/quick review.
>
> >> You can give me some guide line how to process it.
>
> >>
>
> >> Details:
>
> >> Cheese doesn’t perform well on my netbook, after some tries; I’d
> like discuss some opportunity with you.
>
> >>
>
> >> 0. Rob suggest me use gconf key for customized options, it has been
> reflected in the attached patch.
>
> >>
>
> >> 1. ALSA or PulseAudio
>
> >>
>
> >> Gconfaudiosrc is default to PulseAudio on my platform, however if I
> use ALSA directly, it will reduce CPU consummation.
>
> >>
>
> >> For example, for audio only recording, Gst pipeline with PulseAudio
> src consumes 50%CPU, while with ALSA src consumes 30% CPU.
>
> >>
>
> >> Should we add some options(man through UI) to let user select ALSA
> as audio src?
>
> >
>
> > I would rather like to see oprofile reports for both variants. Lets
> first see
>
> > the performance can be improved.
>
> >
>
> > Stefan
>