From 72a4cf20cb71a327c636c7042fdacc25abffc87c Mon Sep 17 00:00:00 2001 From: Alex Shi Date: Thu, 20 Jun 2013 10:18:53 +0800 Subject: [PATCH] sched: Change cfs_rq load avg to unsigned long Since the 'u64 runnable_load_avg, blocked_load_avg' in cfs_rq struct are smaller than 'unsigned long' cfs_rq->load.weight. We don't need u64 vaiables to describe them. unsigned long is more efficient and convenience. Signed-off-by: Alex Shi Reviewed-by: Paul Turner Tested-by: Vincent Guittot Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1371694737-29336-10-git-send-email-alex.shi@intel.com Signed-off-by: Ingo Molnar --- kernel/sched/debug.c | 4 ++-- kernel/sched/fair.c | 7 ++----- kernel/sched/sched.h | 2 +- 3 files changed, 5 insertions(+), 8 deletions(-) diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 75024a673520..160afdc5cdff 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -211,9 +211,9 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight); #ifdef CONFIG_FAIR_GROUP_SCHED #ifdef CONFIG_SMP - SEQ_printf(m, " .%-30s: %lld\n", "runnable_load_avg", + SEQ_printf(m, " .%-30s: %ld\n", "runnable_load_avg", cfs_rq->runnable_load_avg); - SEQ_printf(m, " .%-30s: %lld\n", "blocked_load_avg", + SEQ_printf(m, " .%-30s: %ld\n", "blocked_load_avg", cfs_rq->blocked_load_avg); SEQ_printf(m, " .%-30s: %lld\n", "tg_load_avg", (unsigned long long)atomic64_read(&cfs_rq->tg->load_avg)); diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7948bb825985..f19772de1b1c 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4181,12 +4181,9 @@ static int tg_load_down(struct task_group *tg, void *data) if (!tg->parent) { load = cpu_rq(cpu)->avg.load_avg_contrib; } else { - unsigned long tmp_rla; - tmp_rla = tg->parent->cfs_rq[cpu]->runnable_load_avg + 1; - load = tg->parent->cfs_rq[cpu]->h_load; - load *= tg->se[cpu]->avg.load_avg_contrib; - load /= tmp_rla; + load = div64_ul(load * tg->se[cpu]->avg.load_avg_contrib, + tg->parent->cfs_rq[cpu]->runnable_load_avg + 1); } tg->cfs_rq[cpu]->h_load = load; diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 9c65d46504b1..9eb12d9edd35 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -277,7 +277,7 @@ struct cfs_rq { * This allows for the description of both thread and group usage (in * the FAIR_GROUP_SCHED case). */ - u64 runnable_load_avg, blocked_load_avg; + unsigned long runnable_load_avg, blocked_load_avg; atomic64_t decay_counter, removed_load; u64 last_decay; -- 2.20.1