[MPlayer-dev-eng] [PATCH]Add support for CoreAVC h264 codec

[Luca Barbato]

Loren Merritt wrote:
> On Thu, 5 Oct 2006, Luca Barbato wrote:
>> Michael Niedermayer wrote:
>>
>>> could you post benchmarks with h264 videos with various parameters with
>>> coreavc and ffh264? that should be VERY usefull to find out which
>>> parts are
>>> faster then ffh264 which could then help to improve ffh264
>>>
>>> things to test
>>> * low resolution where all reference frames+1 _easily_ fit in the L2
>>> cache
>>> * CABAC / CAVLC
>>> * high bitrate / low bitrate
>>> * intra only
>>> * B frames vs. no B frames
>>> * loop filter / disabled loop filter
>>
>> Please also use oprofile (latest release/cvs) or equivalent tools,
>> recently I started digging a bit and looks like that:
>>
>> for G4 you spend 23% memcpying data (equally balanced smallcopys and
>> bigcopys, I implemented a naif smallcopy and I shaved 1/25 of the time)
>>
>> for G5 you spend nearly 10% of the time (the glibc in gentoo includes G5
>> specific improvements over standard memcpy)
> 
> Really? 

Check that your oprofile is set to track libraries separated and that it
can access debug symbols (the latest one seems to get the splitdebug
ones as well)

lu

-- 

Luca Barbato

Gentoo/linux Gentoo/PPC
http://dev.gentoo.org/~lu_zero

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