Re: [CFT][PATCH] new scheduler policy

Mike Galbraith
2003-08-19T10:20:20Z

At 11:53 AM 8/19/2003 +1000, Nick Piggin wrote:
>Hi everyone,
>
>As per the latest trend these days, I've done some tinkering with
>the cpu scheduler. I have gone in the opposite direction of most
>of the recent stuff and come out with something that can be nearly
>as good interactivity wise (for me).
>
>I haven't run many tests on it - my mind blanked when I tried to
>remember the scores of scheduler "exploits" thrown around. So if
>anyone would like to suggest some, or better still, run some,
>please do so. And be nice, this isn't my type of scheduler :P

Ok, I took it out for a quick spin...

Test-starve.c starvation is back (curable via other means), but irman2 is
utterly harmless. Responsiveness under load is very nice until I get to
the "very hefty" end of the spectrum (expected). Throughput is down a bit
at make -j30, and there are many cc1's running at very high priority once
swap becomes moderately busy. OTOH, concurrency for the make -jN in
general appears to be up a bit. X is pretty choppy when moving windows
around, but that _appears_ to be the newer/tamer backboost bleeding a
kdeinit thread a bit too dry. (I think it'll be easy to correct, will let
you know if what I have in mind to test that theory works out). Ending on
a decidedly positive note, I can no longer reproduce priority inversion
troubles with xmms's gl thread, nor with blender.

(/me wonders what the reports from wine/game folks will be like)

-Mike