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
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