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| author | Thara Gopinath <thara.gopinath@linaro.org> | 2020-02-21 19:52:11 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-03-06 12:57:20 +0100 |
| commit | 467b7d01c469dc6aa492c17d1f1d1952632728f1 (patch) | |
| tree | 0d664bba0c4ee2e122db5078069fe32c15776cc6 /kernel/sched | |
| parent | b4eccf5f8e1dcade112d97be86ad455a94501a0f (diff) | |
| download | linux-467b7d01c469dc6aa492c17d1f1d1952632728f1.tar.bz2 | |
sched/fair: Update cpu_capacity to reflect thermal pressure
cpu_capacity initially reflects the maximum possible capacity of a CPU.
Thermal pressure on a CPU means this maximum possible capacity is
unavailable due to thermal events. This patch subtracts the average
thermal pressure for a CPU from its maximum possible capacity so that
cpu_capacity reflects the remaining maximum capacity.
Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200222005213.3873-8-thara.gopinath@linaro.org
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/fair.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 11f8488f83d7..aa51286c66da 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7984,8 +7984,15 @@ static unsigned long scale_rt_capacity(struct sched_domain *sd, int cpu) if (unlikely(irq >= max)) return 1; + /* + * avg_rt.util_avg and avg_dl.util_avg track binary signals + * (running and not running) with weights 0 and 1024 respectively. + * avg_thermal.load_avg tracks thermal pressure and the weighted + * average uses the actual delta max capacity(load). + */ used = READ_ONCE(rq->avg_rt.util_avg); used += READ_ONCE(rq->avg_dl.util_avg); + used += thermal_load_avg(rq); if (unlikely(used >= max)) return 1; |