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[71.255.246.27]) by smtp.googlemail.com with ESMTPSA id b81sm7183497qkc.135.2020.01.14.11.57.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 14 Jan 2020 11:57:49 -0800 (PST) From: Thara Gopinath To: mingo@redhat.com, peterz@infradead.org, ionela.voinescu@arm.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rui.zhang@intel.com, qperret@google.com, daniel.lezcano@linaro.org, viresh.kumar@linaro.org Cc: linux-kernel@vger.kernel.org, amit.kachhap@gmail.com, javi.merino@kernel.org, amit.kucheria@verdurent.com Subject: [Patch v8 4/7] sched/fair: Enable periodic update of average thermal pressure Date: Tue, 14 Jan 2020 14:57:36 -0500 Message-Id: <1579031859-18692-5-git-send-email-thara.gopinath@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1579031859-18692-1-git-send-email-thara.gopinath@linaro.org> References: <1579031859-18692-1-git-send-email-thara.gopinath@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- kernel/sched/fair.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 8da0222..311bb0b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7470,6 +7470,9 @@ 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; @@ -7495,6 +7498,7 @@ static bool __update_blocked_others(struct rq *rq, bool *done) { const struct sched_class *curr_class; u64 now = rq_clock_pelt(rq); + unsigned long thermal_pressure = arch_cpu_thermal_pressure(cpu_of(rq)); bool decayed; /* @@ -7505,6 +7509,8 @@ static bool __update_blocked_others(struct rq *rq, bool *done) decayed = update_rt_rq_load_avg(now, rq, curr_class == &rt_sched_class) | update_dl_rq_load_avg(now, rq, curr_class == &dl_sched_class) | + update_thermal_load_avg(rq_clock_task(rq), rq, + thermal_pressure) | update_irq_load_avg(rq, 0); if (others_have_blocked(rq)) @@ -10275,6 +10281,7 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued) { struct cfs_rq *cfs_rq; struct sched_entity *se = &curr->se; + unsigned long thermal_pressure = arch_cpu_thermal_pressure(cpu_of(rq)); for_each_sched_entity(se) { cfs_rq = cfs_rq_of(se); @@ -10286,6 +10293,7 @@ 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)); + update_thermal_load_avg(rq_clock_task(rq), rq, thermal_pressure); } /* -- 2.1.4