2009-01-10, 02:33
cejstrup Wrote:I can play the killa sample without dropped frames with an e7200 at stock speed 2.53GHz and geforce 7100gs. This is with hardy. With intrepid I still had dropped frames at 3.1GHz and uneven CPU load. In hardy its perfectly symmetrical around 70% load on each core
So to summerize a little what we found out so far:
Most people has problems with performance running XBMC on Intrepid. The performance difference is 20-35%
The possible reasons:
- The new Completely Fair Scheduler CFS intruduced from 2.6.26 kernel, has a different method for load distribution to CPUs.
- FFmpeg libs compilation difference in Hardy and Intrepid
- CPU energy management problem
Possible solutions:
- Tune CFS for focusing resources to xbmc. Or completely revert to the old scheduler if possible.
- Various tweaks in ffmpeg compile configuration files
- Copy the old dynamic linked libs from hardy to intrepid.
I will try out solution 2 and 3 tomorow and report back.
For solution 1 i don't have the knowledge.
Anybody to add something ?