On Wed, 2005-03-30 at 15:45 -0500, Tom Lichti wrote: > When running the configure script I notice that my CPU (model name > : AMD Sempron(tm) 2200+) is detected and compiled as 'pentiumpro'. > There was a script posted to one of the lists called gccopts, which on > my system reports: > > -march=athlon-xp -mfpmath=sse -msse -mmmx -m3dnow The "-msse -mmmx -m3dnow" are redundant with "-march=athlon-xp" and will not improve performance much without -mfpmath=sse. I'm not adding -mfpmath=sse as a default unless Issac wants it. ffmpeg is uses hand optimized assembler and -mfpmath=sse may trigger bugs in the compiler or ffmpeg which are difficult to debug.
But if you can show -march=athlon-xp is faster than the default I'll certainly make that change. Just play the same video with each both sets of flags give me the results of time mythtv 60_second_video_file.mpg BTW -mfpmath=sse gives approximately a 10-20% speed boost to MythTV depending on various factors. -- Daniel
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