On Mon, 30 Jul 2007, Ingo Molnar wrote:
* [email protected] <[email protected]> wrote:
Would you be interested in trying CFS and doing some numers perhaps?
It requires some work: you have to start up your favorite game in a
way that gives a reliable framerate number. (many games allow the
display of FPS in-game) In Quake3 i simply started the game and did
not move the player - that is something easy to reproduce.
the one report that I saw said that the FPS numbers were overall the
same, but what the reporter was seeing was that CFS was doing it in
bursts of activity while SD was smoother. [...]
which report is that, precisely? I'm not aware of any such report past
CFS v14 or so.
IIRC Linus responded with thoughts on granularity and the fact that
changing from Hz 1000 to Hz 100 will increase the timeslices in CFS by
10x (which could be enough to trigger this sort of issue)
ah, you mean Kasper Sandberg's report? That turned out to be based on an
older CFS version, not v2.6.23-rc1. Kasper said he'll redo his tests,
and if there's still any regression left we'll fix it.
probably. I delete lkml messages pretty agressivly so I don't have them
around to refer to.
David Lang
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