[mythtv] CPU detection/optimization
Tom Lichti
tom at redpepperracing.com
Thu Mar 31 15:52:23 UTC 2005
Daniel Kristjansson wrote:
> On Wed, 2005-03-30 at 23:57 -0500, Tom Lichti wrote:
>
>>Daniel Kristjansson wrote:
>>
>>> time mythtv 60_second_video_file.mpg
>>
>>Not sure what that is supposed to show, other than it takes 60 seconds
>>to play 60 seconds? Anyway, the results of that test (using a CVS build
>>from the 23rd, one from this afternoon, both with 'pentiumpro' as the
>>march, and one from today with 'athlon-xp' as the march) didn't show any
>>appreciable difference doing the above test. I just catted /dev/video1
>>to tmp.mpg for 60 seconds, and then used that as the source for the test.
>
>
> time gives the elapsed time, which isn't very interesting in this case,
> but it also gives the user and system time, which are..
>
> -- Daniel
>
>
Ok, I didn't think there was much difference but here they are:
Last weeks build (pentiumpro):
R 1m5.295s
U 0m10.925s
S 0m2.691s
Yesterday's build (pentiumpro):
R 1m5.809s
U 0m10.999s
S 0m2.570s
Yesterday's build (athlon-xp):
R 1m6.954s
U 0m11.297s
S 0m2.879s
I only ran each test once (I was tired of watching Keanu Reeves blab to
some chick for 60 seconds...) but I did notice on the console a TON of
pre-buffering pauses and 'audio out of sync' messages, for all three
runs. Not sure if that's noteworthy or not. Anyway, I'll try installing
the athlon-xp build tonight and see how stable it is. I used all the
flags that were suggested, including the fspmath (or whatever it was).
Tom
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