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sched: Comment updates: fix default latency and granularity numbers

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Targeted preemption latency and minimal preemption granularity
for CPU-bound tasks have been changed.

This patch updates the comments about these values.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20101014160913.eb24fef4.yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Takuya Yoshikawa 2010-10-14 16:09:13 +09:00 committed by Ingo Molnar
parent ed859ed3b0
commit 864616ee67
1 changed files with 2 additions and 2 deletions
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4
kernel/sched_fair.c
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@ -25,7 +25,7 @@
/* /*
* Targeted preemption latency for CPU-bound tasks: * Targeted preemption latency for CPU-bound tasks:
* (default: 5ms * (1 + ilog(ncpus)), units: nanoseconds) * (default: 6ms * (1 + ilog(ncpus)), units: nanoseconds)
* *
* NOTE: this latency value is not the same as the concept of * NOTE: this latency value is not the same as the concept of
* 'timeslice length' - timeslices in CFS are of variable length * 'timeslice length' - timeslices in CFS are of variable length
@ -52,7 +52,7 @@ enum sched_tunable_scaling sysctl_sched_tunable_scaling
/* /*
* Minimal preemption granularity for CPU-bound tasks: * Minimal preemption granularity for CPU-bound tasks:
* (default: 2 msec * (1 + ilog(ncpus)), units: nanoseconds) * (default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
*/ */
unsigned int sysctl_sched_min_granularity = 750000ULL; unsigned int sysctl_sched_min_granularity = 750000ULL;
unsigned int normalized_sysctl_sched_min_granularity = 750000ULL; unsigned int normalized_sysctl_sched_min_granularity = 750000ULL;