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| author | Vincent Guittot <vincent.guittot@linaro.org> | 2021-02-24 14:30:06 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2021-03-06 12:40:22 +0100 |
| commit | c6f886546cb8a38617cdbe755fe50d3acd2463e4 (patch) | |
| tree | 7bc2bc591b13312964251693f7a005f00f616f59 /kernel/sched/idle.c | |
| parent | 6553fc18179113a11835d5fde1735259f8943a55 (diff) | |
| download | linux-c6f886546cb8a38617cdbe755fe50d3acd2463e4.tar.bz2 | |
sched/fair: Trigger the update of blocked load on newly idle cpu
Instead of waking up a random and already idle CPU, we can take advantage
of this_cpu being about to enter idle to run the ILB and update the
blocked load.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/20210224133007.28644-7-vincent.guittot@linaro.org
Diffstat (limited to 'kernel/sched/idle.c')
| -rw-r--r-- | kernel/sched/idle.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 7199e6f23789..7a92d6054aba 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -261,6 +261,12 @@ exit_idle: static void do_idle(void) { int cpu = smp_processor_id(); + + /* + * Check if we need to update blocked load + */ + nohz_run_idle_balance(cpu); + /* * If the arch has a polling bit, we maintain an invariant: * |