Commit-ID: 72a4cf20cb71a327c636c7042fdacc25abffc87c
Gitweb: http://git.kernel.org/tip/72a4cf20cb71a327c636c7042fdacc25abffc87c
Author: Alex Shi <alex.shi@xxxxxxxxx>
AuthorDate: Thu, 20 Jun 2013 10:18:53 +0800
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 27 Jun 2013 10:07:38 +0200
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 <alex.shi@xxxxxxxxx>
Reviewed-by: Paul Turner <pjt@xxxxxxxxxx>
Tested-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1371694737-29336-10-git-send-email-alex.shi@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
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 75024a6..160afdc 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 7948bb8..f19772d 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 9c65d46..9eb12d9 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;
--
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