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DragonFly kernel List (threaded) for 2004-09
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Re: Scheduler question

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Mon, 6 Sep 2004 13:22:11 -0700 (PDT)

:I'll gladly attach my sentiment to that.
:>so I was interested to find some very enthusiastic reactions in the
:>lkml to Con Kolivas's new staircase scheduler for linux.  It was
:>described as not only very effective but also as 'simple' in
:>design.  (See the 'Scheduler experiences' thread in lkml, 05Sep.)
:I think that any typical scheduler such as present in either Linux or BSD
:might not be fully optimal for DF given how we are switching major
:subsystems to non-typical Unix ways of doing these.  It might be better to
:check out microkernels and see how they also do this.
:Of course, I could be totally off base, as happens from time to time (or was
:that almost all the time?), and then my above statement is at value void.
:Btw Matt, I am getting insane from the intr 5 livelocked! livelock removed
:messages.  It floods my vty0.  intr 5 is my audigy and typically scores
:around 80000-85000 Hz and drops back to 8000 Hz and up and down and up and
:Jeroen Ruigrok van der Werven <asmodai(at)wxs.nl> / asmodai / kita no mono
:Free Tibet! http://www.savetibet.org/ | http://www.tibet.nu/
    85000 hz?  That doesn't sound right.  In anycase, you can adjust the livelock
    parameters with sysctls:

    kern.livelock_limit: 50000
    kern.livelock_fallback: 20000

					Matthew Dillon 

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