Messages in this thread Patch in this message | | | From | Alex Shi <> | Subject | [PATCH 3/4] sched: consider runnable load average in move_tasks | Date | Thu, 24 Jan 2013 11:30:42 +0800 |
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Except using runnable load average in background, move_tasks is also the key functions in load balance. We need consider the runnable load average in it in order to the apple to apple load comparison.
Signed-off-by: Alex Shi <alex.shi@intel.com> --- kernel/sched/fair.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 9148bcc..876a6a0 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4192,6 +4192,15 @@ static unsigned long task_h_load(struct task_struct *p); static const unsigned int sched_nr_migrate_break = 32; +static unsigned long task_h_load_avg(struct task_struct *p) +{ + u32 period = p->se.avg.runnable_avg_period; + if (!period) + return 0; + + return task_h_load(p) * p->se.avg.runnable_avg_sum / period; +} + /* * move_tasks tries to move up to imbalance weighted load from busiest to * this_rq, as part of a balancing operation within domain "sd". @@ -4227,7 +4236,7 @@ static int move_tasks(struct lb_env *env) if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) goto next; - load = task_h_load(p); + load = task_h_load_avg(p); if (sched_feat(LB_MIN) && load < 16 && !env->sd->nr_balance_failed) goto next; -- 1.7.0.1
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