On Fri, Nov 16, 2007 at 07:07:00AM +0100, Ingo Molnar wrote: > > My best guess is that this has something to do with the timing with > > which we sample the CPU's instantaneous load when calculating the load > > averages.. but I still understand only the basics of the scheduler and > > SMP balancer. All I really know for sure at this point regarding your > > patch is that git-bisect found it for me. > > hm, your code uses timeouts for this, right? The CPU load average that > is used for SMP load balancing is sampled from the scheduler tick - and > has been sampled from the scheduler tick for eons. v2.6.23 defaulted to > a different method but v2.6.24 samples it from the tick again. So my > guess is, your testcode behave similarly on 2.6.22 too, correct?
My sample program (and the VMware code which I originally observed this behaviour with) wakes up frequently using /dev/rtc. I know the problem occurs on 2.6.20 and 2.6.23.1. I haven't tried 2.6.22 yet, but I'll do so as soon as I can. Thanks, --Micah - 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/