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[PATCH] sched: remove sleep_avg multiplier

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Remove the sleep_avg multiplier.  This multiplier was necessary back when
we had 10 seconds of dynamic range in sleep_avg, but now that we only have
one second, it causes that one second to be compressed down to 100ms in
some cases.  This is particularly noticeable when compiling a kernel in a
slow NFS mount, and I believe it to be a very likely candidate for other
recently reported network related interactivity problems.

In testing, I can detect no negative impact of this removal.

Signed-off-by: Mike Galbraith <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Mike Galbraith 2006-03-22 00:07:33 -08:00 • committed by Linus Torvalds
commit 9430d58e34
1 changed files with 0 additions and 6 deletions
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6
kernel/sched.c
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@ -706,12 +706,6 @@ static int recalc_task_prio(task_t *p, unsigned long long now)
p->sleep_avg = JIFFIES_TO_NS(MAX_SLEEP_AVG -
DEF_TIMESLICE);
} else {
/*
* The lower the sleep avg a task has the more
* rapidly it will rise with sleep time.
*/
sleep_time *= (MAX_BONUS - CURRENT_BONUS(p)) ? : 1;
/*
* Tasks waking from uninterruptible sleep are
* limited in their sleep_avg rise as they