Messages in this thread Patch in this message | | | From | Thara Gopinath <> | Subject | [Patch v5 3/6] sched/fair: Enable periodic update of average thermal pressure | Date | Tue, 5 Nov 2019 13:49:43 -0500 |
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Introduce support in CFS periodic tick and other bookkeeping apis to trigger the process of computing average thermal pressure for a cpu. Also consider avg_thermal.load_avg in others_have_blocked which allows for decay of pelt signals.
Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> ---
v4->v5: - Updated both versions of update_blocked_averages to trigger the process of computing average thermal pressure. - Updated others_have_blocked to considerd avg_thermal.load_avg.
kernel/sched/fair.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 2e907cc..9fb0494 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -92,6 +92,8 @@ const_debug unsigned int sysctl_sched_migration_cost = 500000UL; */ static DEFINE_PER_CPU(unsigned long, thermal_pressure); +static void trigger_thermal_pressure_average(struct rq *rq); + #ifdef CONFIG_SMP /* * For asym packing, by default the lower numbered CPU has higher priority. @@ -7493,6 +7495,9 @@ static inline bool others_have_blocked(struct rq *rq) if (READ_ONCE(rq->avg_dl.util_avg)) return true; + if (READ_ONCE(rq->avg_thermal.load_avg)) + return true; + #ifdef CONFIG_HAVE_SCHED_AVG_IRQ if (READ_ONCE(rq->avg_irq.util_avg)) return true; @@ -7580,6 +7585,8 @@ static void update_blocked_averages(int cpu) done = false; update_blocked_load_status(rq, !done); + + trigger_thermal_pressure_average(rq); rq_unlock_irqrestore(rq, &rf); } @@ -7646,6 +7653,7 @@ static inline void update_blocked_averages(int cpu) update_dl_rq_load_avg(rq_clock_pelt(rq), rq, curr_class == &dl_sched_class); update_irq_load_avg(rq, 0); update_blocked_load_status(rq, cfs_rq_has_blocked(cfs_rq) || others_have_blocked(rq)); + trigger_thermal_pressure_average(rq); rq_unlock_irqrestore(rq, &rf); } @@ -9939,6 +9947,8 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued) update_misfit_status(curr, rq); update_overutilized_status(task_rq(curr)); + + trigger_thermal_pressure_average(rq); } /* -- 2.1.4
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