Messages in this thread Patch in this message | | | Date | Mon, 27 Oct 2014 17:41:28 +0800 | From | Yao Dongdong <> | Subject | [PATCH v2]sched:add check of shallowest_idle_cpu before search for least_loaded_cpu |
| |
Idle cpu is idler than non-idle cpu, so we needn't search for least_loaded_cpu after we have found an idle cpu.
Signed-off-by:yaodongdong@huawei.com Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 0b069bf..2445a23 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4446,7 +4446,7 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu) latest_idle_timestamp = rq->idle_stamp; shallowest_idle_cpu = i; } - } else { + } else if (shallowest_idle_cpu == -1) { load = weighted_cpuload(i); if (load < min_load || (load == min_load && i == this_cpu)) { min_load = load; -- 1.8.0.1
| |