Messages in this thread Patch in this message | | | Date | Tue, 18 Jun 2013 17:44:35 +0800 | From | Alex Shi <> | Subject | Re: [patch v8 6/9] sched: compute runnable load avg in cpu_load and cpu_avg_load_per_task |
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> > Paul, could I summary your point here: > keep current weighted_cpu_load, but add blocked load avg in > get_rq_runnable_load? > > I will test this change.
Current testing(kbuild, oltp, aim7) don't show clear different on my NHM EP box between the following and the origin patch, the only different is get_rq_runnable_load added blocked_load_avg. in SMP will test more cases and more box.
--- kernel/sched/fair.c | 5 +++-- kernel/sched/proc.c | 17 +++++++++++++++-- 2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 1e5a5e6..7d5c477 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2968,7 +2968,7 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags) /* Used instead of source_load when we know the type == 0 */ static unsigned long weighted_cpuload(const int cpu) { - return cpu_rq(cpu)->load.weight; + return cpu_rq(cpu)->cfs.runnable_load_avg; } /* @@ -3013,9 +3013,10 @@ static unsigned long cpu_avg_load_per_task(int cpu) { struct rq *rq = cpu_rq(cpu); unsigned long nr_running = ACCESS_ONCE(rq->nr_running); + unsigned long load_avg = rq->cfs.runnable_load_avg; if (nr_running) - return rq->load.weight / nr_running; + return load_avg / nr_running; return 0; } diff --git a/kernel/sched/proc.c b/kernel/sched/proc.c index bb3a6a0..36d7db6 100644 --- a/kernel/sched/proc.c +++ b/kernel/sched/proc.c @@ -501,6 +501,18 @@ static void __update_cpu_load(struct rq *this_rq, unsigned long this_load, sched_avg_update(this_rq); } +#ifdef CONFIG_SMP +unsigned long get_rq_runnable_load(struct rq *rq) +{ + return rq->cfs.runnable_load_avg + rq->cfs.blocked_load_avg; +} +#else +unsigned long get_rq_runnable_load(struct rq *rq) +{ + return rq->load.weight; +} +#endif + #ifdef CONFIG_NO_HZ_COMMON /* * There is no sane way to deal with nohz on smp when using jiffies because the @@ -522,7 +534,7 @@ static void __update_cpu_load(struct rq *this_rq, unsigned long this_load, void update_idle_cpu_load(struct rq *this_rq) { unsigned long curr_jiffies = ACCESS_ONCE(jiffies); - unsigned long load = this_rq->load.weight; + unsigned long load = get_rq_runnable_load(this_rq); unsigned long pending_updates; /* @@ -568,11 +580,12 @@ void update_cpu_load_nohz(void) */ void update_cpu_load_active(struct rq *this_rq) { + unsigned long load = get_rq_runnable_load(this_rq); /* * See the mess around update_idle_cpu_load() / update_cpu_load_nohz(). */ this_rq->last_load_update_tick = jiffies; - __update_cpu_load(this_rq, this_rq->load.weight, 1); + __update_cpu_load(this_rq, load, 1); calc_load_account_active(this_rq); } -- 1.7.12 -- Thanks Alex
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