Markus Törnqvist wrote: > On Mon, Mar 05, 2007 at 08:34:45AM +0300, Al Boldi wrote: > >Ok, gears is smooth when you run "make -j4", but with "nice make -j4", > > gears becomes bursty. This looks like a problem with nice-levels. In > > general, looking subjectively at top d.1, procs appear to show jerkiness > > when nice'd. > > Don't use glxgears, please. Ever. Unless you want meaningless gears. > > It displays totally erratic behaviour anyway, and does sched_yield (strace > tells us this) which means IT GIVES UP ITS TIME TO RUN, ie yields the > cpu to someone else.
I just strace'd it here. It doesn't show any yield in the mesa-5.0 version. Which version are you using? > >Do you have an objective test-case that can show the even-ness of RSDL in > >both nice'd and normal scenarios? > > A big movie, like DVD-quality, full resolution should do the trick. > That's what I used ;) The problem with audio/video is that they usually do buffering, which hides scheduler anomalies. > Debian and Ubuntu at least ship "stress" which I also used and reniced > in-flight with excellent results, but do note to start off with small > settings and work up or you might overcommit your box, in a way which > no scheduler can handle. Can you give a link? Thanks! -- Al - 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/
