On 04/08/2007 12:41 PM, Ingo Molnar wrote:

this is pretty hard to get right, and the most objective way to change it is to do it testcase-driven. FYI, interactivity tweaking has been gradual, the last bigger round of interactivity changes were done a year ago:

 commit 5ce74abe788a26698876e66b9c9ce7e7acc25413
 Author: Mike Galbraith <[EMAIL PROTECTED]>
 Date:   Mon Apr 10 22:52:44 2006 -0700

     [PATCH] sched: fix interactive task starvation

(and a few smaller tweaks since then too.)

and that change from Mike responded to a testcase. Mike's latest changes (the ones you just tested) were mostly driven by actual testcases too, which measured long-term timeslice distribution fairness.

Ah yes, that one. Here's the next one in that series:

commit f1adad78dd2fc8edaa513e0bde92b4c64340245c
Author: Linus Torvalds <[EMAIL PROTECTED]>
Date:   Sun May 21 18:54:09 2006 -0700

    Revert "[PATCH] sched: fix interactive task starvation"

It personally had me wonder if _anyone_ was testing this stuff...

Rene.

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