[Gc-linux-devel] Mplayer benchmarks

[Bohdy <bo...@tp...>]

Hello, 
	 I have done some benchmarks with mplayer on gc-linux with various audio and video modes. They may be of interest: 
	 
Sound and video: 
 
SDL sound and video 
BENCHMARKs: VC:  21.087s VO:  27.197s A:   2.843s Sys:   5.826s =   56.953s 
BENCHMARK%: VC: 37.0258% VO: 47.7535% A:  4.9912% Sys: 10.2295% = 100.0000% 
 
SDL video with OSS sound 
BENCHMARKs: VC:  20.013s VO:  26.374s A:   2.302s Sys:   4.381s =   53.069s 
BENCHMARK%: VC: 37.7105% VO: 49.6965% A:  4.3378% Sys:  8.2551% = 100.0000% 
 
fbdev video and SDL sound 
BENCHMARKs: VC:  26.030s VO:   5.755s A:   2.190s Sys:   3.292s =   37.266s 
BENCHMARK%: VC: 69.8480% VO: 15.4421% A:  5.8763% Sys:  8.8336% = 100.0000% 
 
fbdev video with OSS sound 
BENCHMARKs: VC:  26.159s VO:   5.911s A:   1.402s Sys:   1.105s =   34.577s 
BENCHMARK%: VC: 75.6555% VO: 17.0954% A:  4.0537% Sys:  3.1953% = 100.0000% 
 
Video Only: 
 
SDL video with no sound 
BENCHMARKs: VC:  20.332s VO:  27.254s A:   0.000s Sys:   0.580s =   48.165s 
BENCHMARK%: VC: 42.2129% VO: 56.5834% A:  0.0000% Sys:  1.2037% = 100.0000% 
 
fbdev video with no sound 
BENCHMARKs: VC:  26.636s VO:   5.956s A:   0.000s Sys:   0.587s =   33.179s 
BENCHMARK%: VC: 80.2799% VO: 17.9500% A:  0.0000% Sys:  1.7701% = 100.0000% 
 
Sound Only: 
 
SDL sound but no video 
BENCHMARKs: VC:  20.809s VO:   0.012s A:   1.501s Sys:   5.059s =   27.382s 
BENCHMARK%: VC: 75.9970% VO:  0.0433% A:  5.4824% Sys: 18.4773% = 100.0000% 
 
OSS sound but no video 
BENCHMARKs: VC:  20.707s VO:   0.006s A:   1.472s Sys:   6.209s =   28.394s 
BENCHMARK%: VC: 72.9277% VO:  0.0200% A:  5.1846% Sys: 21.8677% = 100.0000% 
 
Transfer rate comparisons: 
 
fbdev video with OSS sound (nocache) 
BENCHMARKs: VC:  23.254s VO:   5.164s A:   7.280s Sys:   6.079s =   41.777s 
BENCHMARK%: VC: 55.6613% VO: 12.3602% A: 17.4270% Sys: 14.5515% = 100.0000% 
 
fbdev video with OSS sound (cache=2048) 
BENCHMARKs: VC:  26.159s VO:   5.911s A:   1.402s Sys:   1.105s =   34.577s 
BENCHMARK%: VC: 75.6555% VO: 17.0954% A:  4.0537% Sys:  3.1953% = 100.0000% 
 
fbdev video with OSS sound (nocache, directly from Aram) 
BENCHMARKs: VC:  22.215s VO:   5.028s A:   1.234s Sys:   0.892s =   29.368s 
BENCHMARK%: VC: 75.6431% VO: 17.1198% A:  4.2011% Sys:  3.0360% = 100.0000% 
 
Pure decoding test: 
 
No video and no sound and limits are off 
BENCHMARKs: VC:  16.034s VO:   0.006s A:   0.000s Sys:   0.553s =   16.594s 
BENCHMARK%: VC: 96.6303% VO:  0.0360% A:  0.0000% Sys:  3.3337% = 100.0000% 
 
All these test have been performed on one quicktime file of fairly high bitrate (~3000 kbps @ 640x480) encoded with the Sorenson 
3 video and mp3 audio codecs with a lenght of 27.5 seconds using mplayer's built in -benchmark mode.  
Of course its worth noting that the fbdev mode produces discoloured results which are completely fixed in Isobel's wonderful SDL 
port but I think that it shows that video output is possible with fairly little overhead. I also think that its clear by the pure decoding 
test that there is a lot of room for improvement. 
 
Cheers, bohdy.