Hi everyone, I have a similar problem with Jaunty on my Athlon 64 X2 5000+: - MB chipset nvidia MCP61 - RAM 2GB - Video GeForce 7300, driver 180.53 - kernel: ubuntu 2.6.28-14-generic #47-Ubuntu SMP Sat Jul 25 00:28:35 UTC 2009 i686
In my case, it looks like the kernel make the processes swich between cores continually. To reproduce it, I launch an audio player (VLC) and a simple command to generate load: $ dd if=/dev/urandom of=/dev/null The audio reproduction is jerky. If I force the affinity with a single core, the problem disappears: $ schedtool -a 0 -e dd if=/dev/urandom of=/dev/null In general, if a process need 100% of CPU (Firefox, Enemy Territory, mencoder...), the system begin to hang (Enemy territory is unplayable if I don't launch it with schedtool). There was not this problem with 2.6.24 kernel in Hardy, just only after update to Jaunty (>= 2.6.28-11). -- [jaunty] cpu scheduling is not optimized for multitask https://bugs.launchpad.net/bugs/363663 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
