On 03.09, Robert Love wrote: > On Tue, 2005-03-08 at 23:36 +0000, J.A. Magallon wrote: > > > Can cpu affinity really be changed for a running process ? > > Yes. > > > Does it need something like io or yielding to take effect ? > > No. > ... > > Although, you have the syntax wrong. It should be > > taskset -c 0 -p 8277 >
That was what I first tried, but: werewolf:~> ps -ef | grep box magallon 8638 8629 99 00:47 pts/0 00:01:54 box-d --out box.srf @opt magallon 8733 8643 0 00:48 pts/2 00:00:00 grep box werewolf:~> taskset -c 0 -p 8638 execvp: No such file or directory failed to execute -p > > > The program uses posix threads, 2 in this case. The two threads change from > > cpu sometimes (not too often), but do not go into the same processor > > immediately as when I start the program directly with runon/taskset. > > You have to bind all of the threads individually. > Ahh, damn, that explains it. I use a main thread that does nothing but wait for the worker threads. So it sure gets moved to CPU0, but as it does not waste CPU time, I do not see it... Thanks. Will see what can I do with my threads. cpusets, perhaps... -- J.A. Magallon <jamagallon()able!es> \ Software is like sex: werewolf!able!es \ It's better when it's free Mandrakelinux release 10.2 (Cooker) for i586 Linux 2.6.11-jam3 (gcc 3.4.3 (Mandrakelinux 10.2 3.4.3-3mdk)) #1 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
