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Con Kolivas wrote: > Hi Al Hi Con! > On Tuesday 11 April 2006 00:43, Al Boldi wrote: > > After that the loadavg starts to wrap. > > And even then it is possible to login. > > And that's not with the default 2.6 scheduler, but rather w/ spa. > > Since you seem to use plugsched, I wonder if you could tell me how does > current staircase perform with a load like that? With plugsched-2.6.16 your staircase sched reaches about 40 then slows down, maxing around 100. Setting sched_compute=1 causes console lock-ups. With staircase14.2-test3 it reaches around 300 then slows down, halting at around 500. Your scheduler seems to be tuned for single-user multi-tasking, i.e. concurrent tasks around 10, where its aggressive nature is sustained by a short run-queue. Once you go above 50, this aggressiveness starts to express itself as very jumpy. This is of course very cpu/mem/ctxt dependent and it would be great, if your scheduler could maybe do some simple on-the-fly benchmarking as it reschedules, thus adjusting this aggressiveness depending on its sustainability. Thanks! -- Al - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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