Commit-ID: dfa444dc2ff62edbaf1ff95ed22dd2ce8a5715da Gitweb: https://git.kernel.org/tip/dfa444dc2ff62edbaf1ff95ed22dd2ce8a5715da Author: Vincent Guittot <vincent.guit...@linaro.org> AuthorDate: Thu, 28 Jun 2018 17:45:11 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Sun, 15 Jul 2018 23:51:21 +0200
sched/cpufreq: Remove sugov_aggregate_util() There is no reason why sugov_get_util() and sugov_aggregate_util() were in fact separate functions. Signed-off-by: Vincent Guittot <vincent.guit...@linaro.org> [ Rebased after adding irq tracking and fixed some compilation errors. ] Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Acked-by: Viresh Kumar <viresh.ku...@linaro.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: morten.rasmus...@arm.com Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: clau...@evidence.eu.com Cc: daniel.lezc...@linaro.org Cc: dietmar.eggem...@arm.com Cc: j...@joelfernandes.org Cc: juri.le...@redhat.com Cc: luca.ab...@santannapisa.it Cc: patrick.bell...@arm.com Cc: quentin.per...@arm.com Cc: r...@rjwysocki.net Cc: valentin.schnei...@arm.com Link: http://lkml.kernel.org/r/1530200714-4504-9-git-send-email-vincent.guit...@linaro.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/sched/cpufreq_schedutil.c | 44 ++++++++++++++-------------------------- kernel/sched/sched.h | 2 +- 2 files changed, 16 insertions(+), 30 deletions(-) diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index 7016bde9d194..c9622b3f183d 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -53,12 +53,7 @@ struct sugov_cpu { unsigned int iowait_boost_max; u64 last_update; - /* The fields below are only needed when sharing a policy: */ - unsigned long util_cfs; - unsigned long util_dl; unsigned long bw_dl; - unsigned long util_rt; - unsigned long util_irq; unsigned long max; /* The field below is for single-CPU policies only: */ @@ -182,38 +177,31 @@ static unsigned int get_next_freq(struct sugov_policy *sg_policy, return cpufreq_driver_resolve_freq(policy, freq); } -static void sugov_get_util(struct sugov_cpu *sg_cpu) +static unsigned long sugov_get_util(struct sugov_cpu *sg_cpu) { struct rq *rq = cpu_rq(sg_cpu->cpu); + unsigned long util, irq, max; - sg_cpu->max = arch_scale_cpu_capacity(NULL, sg_cpu->cpu); - sg_cpu->util_cfs = cpu_util_cfs(rq); - sg_cpu->util_dl = cpu_util_dl(rq); - sg_cpu->bw_dl = cpu_bw_dl(rq); - sg_cpu->util_rt = cpu_util_rt(rq); - sg_cpu->util_irq = cpu_util_irq(rq); -} - -static unsigned long sugov_aggregate_util(struct sugov_cpu *sg_cpu) -{ - struct rq *rq = cpu_rq(sg_cpu->cpu); - unsigned long util, max = sg_cpu->max; + sg_cpu->max = max = arch_scale_cpu_capacity(NULL, sg_cpu->cpu); + sg_cpu->bw_dl = cpu_bw_dl(rq); if (rt_rq_is_runnable(&rq->rt)) - return sg_cpu->max; + return max; + + irq = cpu_util_irq(rq); - if (unlikely(sg_cpu->util_irq >= max)) + if (unlikely(irq >= max)) return max; /* Sum rq utilization */ - util = sg_cpu->util_cfs; - util += sg_cpu->util_rt; + util = cpu_util_cfs(rq); + util += cpu_util_rt(rq); /* * Interrupt time is not seen by RQS utilization so we can compare * them with the CPU capacity */ - if ((util + sg_cpu->util_dl) >= max) + if ((util + cpu_util_dl(rq)) >= max) return max; /* @@ -231,11 +219,11 @@ static unsigned long sugov_aggregate_util(struct sugov_cpu *sg_cpu) */ /* Weight RQS utilization to normal context window */ - util *= (max - sg_cpu->util_irq); + util *= (max - irq); util /= max; /* Add interrupt utilization */ - util += sg_cpu->util_irq; + util += irq; /* Add DL bandwidth requirement */ util += sg_cpu->bw_dl; @@ -418,9 +406,8 @@ static void sugov_update_single(struct update_util_data *hook, u64 time, busy = sugov_cpu_is_busy(sg_cpu); - sugov_get_util(sg_cpu); + util = sugov_get_util(sg_cpu); max = sg_cpu->max; - util = sugov_aggregate_util(sg_cpu); sugov_iowait_apply(sg_cpu, time, &util, &max); next_f = get_next_freq(sg_policy, util, max); /* @@ -459,9 +446,8 @@ static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu, u64 time) struct sugov_cpu *j_sg_cpu = &per_cpu(sugov_cpu, j); unsigned long j_util, j_max; - sugov_get_util(j_sg_cpu); + j_util = sugov_get_util(j_sg_cpu); j_max = j_sg_cpu->max; - j_util = sugov_aggregate_util(j_sg_cpu); sugov_iowait_apply(j_sg_cpu, time, &j_util, &j_max); if (j_util * max > j_max * util) { diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index b2833e2b4b6a..061d51fb5b44 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2226,7 +2226,7 @@ static inline unsigned long cpu_util_cfs(struct rq *rq) static inline unsigned long cpu_util_rt(struct rq *rq) { - return rq->avg_rt.util_avg; + return READ_ONCE(rq->avg_rt.util_avg); } #if defined(CONFIG_IRQ_TIME_ACCOUNTING) || defined(CONFIG_PARAVIRT_TIME_ACCOUNTING)
