Re: Some performance tunning opportunity of cheese

[Stefan Kost <ensonic hora-obscura de>]

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