Hi Josh, On Mon, 30 Jul 2007 14:50:34 -0700 Josh Triplett <[EMAIL PROTECTED]> wrote:
> On Tue, 2007-07-24 at 15:42 +0200, Sébastien Dugué wrote: > > this one-liner fixes a bug in balance_rt_tasks() which sometimes > > manifests by > > having a lower prio task being scheduled while a higher prio task is sitting > > waiting on another runqueue. > > > > This is pretty hard to reproduce on low cpu count machines, for example, I > > had to have sched_football run in a loop for ~38h before it failed on a > > dual HT > > Xeon box. > > Very impressive find, and this does seem to improve things in some > cases. > > However, with 2.6.22.1-rt8, which includes this patch, I still managed > to get some failures after a few hours on an 8-way (quad dual-core) box. > Preliminary results so far: > 420 Final ball position: 0 > 2 Final ball position: 1 > Darn, I thought it was it :( I had a ~60h run on my box with the very same kernel without a single failure. Do you have any other user RT load running when those failures pop up? Anyway, back to scheduler code dissection now. Sébastien. - 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/
