[vlc-devel] VLC's performance on SMP system

Kaloyan Kovachev kkovachev at varna.net
Mon Jun 1 15:51:53 CEST 2009

On Mon, 01 Jun 2009 23:37:45 +1000, xxcv wrote 
> Results: 
> VLC-1.0.0-RC2 + ffmpeg-mt got many avcodec "cannot decode one frame", side
effect = video shakes. 
> Windows build of Mplayer + ffmpeg-mt experimental build worked wonderfully
> Windows Media Player 11.0 + ffdshow + ffmpeg-mt worked fine also. 
> With thread count = 2 
> Compared CPU usage graphs. 
> http://img207.imageshack.us/img207/6103/81030683.png

Just to confirm that with the 64bit (slackware64) built of VLC-1.0.0-RC2 +
ffmpeg-mt the results are the same - 'video shakes' and often there are
artifacts in the picture (when the source is an HD stream with ~12Mbit/s -
with a local file there are no artifacts)

on a quad core CPU (Intel Q9550) and 2 threads the artifacts are in the top of
the screen while with 4 threads in the whole picture and all 4 cores are
loaded at near 100%

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