From 13e53c6a41bbba94bdef99ce6d0c7352733ee396 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 14 Apr 2017 17:29:16 +0200
Subject: [PATCH] sched/debug: Print the scheduler topology group mask
References: bnc#978907 Scheduler performance -- topology
Patch-mainline: v4.13-rc1
Git-commit: b0151c25548cacc50771a7930475727c6c8ee869
In order to determine the balance_cpu (for should_we_balance()) we need
the sched_group_mask() for overlapping domains.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
kernel/sched/topology.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 6cd482e88abb..7a6e9f477702 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -82,12 +82,22 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
printk(KERN_CONT " %*pbl",
cpumask_pr_args(sched_group_cpus(group)));
+
+ if ((sd->flags & SD_OVERLAP) && !cpumask_full(sched_group_mask(group))) {
+ printk(KERN_CONT " (mask: %*pbl)",
+ cpumask_pr_args(sched_group_mask(group)));
+ }
+
if (group->sgc->capacity != SCHED_CAPACITY_SCALE) {
- printk(KERN_CONT " (cpu_capacity = %lu)",
+ printk(KERN_CONT " (cpu_capacity: %lu)",
group->sgc->capacity);
}
group = group->next;
+
+ if (group != sd->groups)
+ printk(KERN_CONT ",");
+
} while (group != sd->groups);
printk(KERN_CONT "\n");