sched/debug: Add new tracepoint to track cpu_capacity
rq->cpu_capacity is a key element in several scheduler parts, such as EAS task placement and load balancing. Tracking this value enables testing and/or debugging by a toolkit. Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/1598605249-72651-1-git-send-email-vincent.donnefort@arm.com
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51cf18c90c
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@ -2044,6 +2044,7 @@ const struct sched_avg *sched_trace_rq_avg_dl(struct rq *rq);
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const struct sched_avg *sched_trace_rq_avg_irq(struct rq *rq);
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int sched_trace_rq_cpu(struct rq *rq);
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int sched_trace_rq_cpu_capacity(struct rq *rq);
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int sched_trace_rq_nr_running(struct rq *rq);
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const struct cpumask *sched_trace_rd_span(struct root_domain *rd);
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@ -630,6 +630,10 @@ DECLARE_TRACE(pelt_se_tp,
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TP_PROTO(struct sched_entity *se),
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TP_ARGS(se));
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DECLARE_TRACE(sched_cpu_capacity_tp,
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TP_PROTO(struct rq *rq),
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TP_ARGS(rq));
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DECLARE_TRACE(sched_overutilized_tp,
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TP_PROTO(struct root_domain *rd, bool overutilized),
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TP_ARGS(rd, overutilized));
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@ -36,6 +36,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_rt_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_dl_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_irq_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_se_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(sched_cpu_capacity_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(sched_overutilized_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_cfs_tp);
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EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_se_tp);
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@ -8108,6 +8108,8 @@ static void update_cpu_capacity(struct sched_domain *sd, int cpu)
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capacity = 1;
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cpu_rq(cpu)->cpu_capacity = capacity;
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trace_sched_cpu_capacity_tp(cpu_rq(cpu));
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sdg->sgc->capacity = capacity;
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sdg->sgc->min_capacity = capacity;
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sdg->sgc->max_capacity = capacity;
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@ -11321,6 +11323,18 @@ int sched_trace_rq_cpu(struct rq *rq)
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}
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EXPORT_SYMBOL_GPL(sched_trace_rq_cpu);
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int sched_trace_rq_cpu_capacity(struct rq *rq)
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{
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return rq ?
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#ifdef CONFIG_SMP
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rq->cpu_capacity
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#else
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SCHED_CAPACITY_SCALE
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#endif
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: -1;
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}
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EXPORT_SYMBOL_GPL(sched_trace_rq_cpu_capacity);
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const struct cpumask *sched_trace_rd_span(struct root_domain *rd)
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{
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#ifdef CONFIG_SMP
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