On Thu, Apr 15, 2010 at 3:54 AM, Andriy Gapon <a...@freebsd.org> wrote:
> This is a good point. > But on the other hand, it means that our scheduler doesn't do a perfect job > here. BTW, I use ULE. > My observation is that when a number of CPU-intensive long running > processes is > less than or equal to number of cores, then the processes tend to stay on > the > same cores for a long time. > But if the number of the processes is greater, then they seem to jump from > core > to core a lot. > But I am not sure what would be an optimal strategy for that case. If we > try to > keep some lucky processes on the same core, then cpu time might be shared > unfairly. Shuffling cores provides more fairness, but can hurt total > performance. > Is is possible to add a tunable to the scheduler for it's aggressiveness in switching cores? -- Adam Vande More _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
