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Commit 864616ee authored by Takuya Yoshikawa's avatar Takuya Yoshikawa Committed by Ingo Molnar
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sched: Comment updates: fix default latency and granularity numbers 



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: default avatarTakuya 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: default avatarIngo Molnar <mingo@elte.hu>
parent ed859ed3

kernel/sched_fair.c

+2 −2
Original line number Diff line number Diff line
@@ -25,7 +25,7 @@ 


/*

 * 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

 * '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:

 * (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 normalized_sysctl_sched_min_granularity = 750000ULL;