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Message-Id: <20210414020436.12980-2-ricardo.neri-calderon@linux.intel.com>
Date: Tue, 13 Apr 2021 19:04:33 -0700
From: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To: "Peter Zijlstra (Intel)" <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.comi>, Mel Gorman <mgorman@...e.de>,
Len Brown <len.brown@...el.com>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Tim Chen <tim.c.chen@...ux.intel.com>,
Aubrey Li <aubrey.li@...ux.intel.com>,
"Ravi V. Shankar" <ravi.v.shankar@...el.com>,
Ricardo Neri <ricardo.neri@...el.com>,
Quentin Perret <qperret@...gle.com>,
"Joel Fernandes (Google)" <joel@...lfernandes.org>,
linux-kernel@...r.kernel.org,
Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
Aubrey Li <aubrey.li@...el.com>,
Ben Segall <bsegall@...gle.com>,
Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: [PATCH v2 1/4] sched/fair: Optimize checking for group_asym_packing
By checking local_group, we can avoid additional checks and invoking
sched_asmy_prefer() when it is not needed.
Cc: Aubrey Li <aubrey.li@...el.com>
Cc: Ben Segall <bsegall@...gle.com>
Cc: Daniel Bristot de Oliveira <bristot@...hat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Joel Fernandes (Google) <joel@...lfernandes.org>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Quentin Perret <qperret@...gle.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Tim Chen <tim.c.chen@...ux.intel.com>
Reviewed-by: Len Brown <len.brown@...el.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
---
Changes since v1:
* None
---
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 04a3ce20da67..4ef3fa0d5e8d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -8455,7 +8455,7 @@ static inline void update_sg_lb_stats(struct lb_env *env,
}
/* Check if dst CPU is idle and preferred to this group */
- if (env->sd->flags & SD_ASYM_PACKING &&
+ if (!local_group && env->sd->flags & SD_ASYM_PACKING &&
env->idle != CPU_NOT_IDLE &&
sgs->sum_h_nr_running &&
sched_asym_prefer(env->dst_cpu, group->asym_prefer_cpu)) {
--
2.17.1
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