[Openchrome-users] XAA and fallback

[Mario Rugiero]

2012/4/4 Llu?s Batlle i Rossell <viric at viric.name>

> On Tue, Apr 03, 2012 at 08:50:50PM -0300, Mario Rugiero wrote:
> > 2012/4/3 Llu?s Batlle i Rossell <viric at viric.name>
> >
> > > On Sat, Mar 24, 2012 at 03:05:01PM -0300, Mario Rugiero wrote:
> > > > Are you sure you are not using xv or xvmc with mplayer? This could
> affect
> > > > CPU use, since it uses the GPU for a part of the decoding.
> > >
> > > xv for sure. xvmc maybe.
> > > Do you think it would matter that much? I'm impressed the flash plugin
> > > works so
> > > slow then, with that chipset. The computer is built much after youtube
> > > became
> > > popular. :)
> > >
> > But IIRC flash plugin doesn't use hardware acceleration under Unichrome
> > cards on Linux, and xv does use your IGP acceleration. So, CPU use will
> be
> > less with mplayer for sure, if your driver supports xv.
>
> Ok, so it is a case where the flash plugin uses one of the slowest paths
> possible to display a video. Is it?
>
> Regards,
> Llu?s.
>
I'm not sure. To talk about the path I think I should know the algorithm
used. The thing is that flash uses your CPU only, so all the processing
consumes CPU cycles, mplayer, since it uses xv, uses the GPU for some
operations, thus using less CPU cycles than flash. The algorithm used can
actually be the same, mplayer could be even more resource consuming
overall, but it uses less CPU because its process is done elsewhere, that's
what I mean.
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