Messages in this thread Patch in this message | | | From | Qais Yousef <> | Subject | [PATCH v4 3/3] sched/tp: Add new tracepoint to track compute energy computation | Date | Mon, 21 Aug 2023 23:45:04 +0100 |
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It was useful to track feec() placement decision and debug the spare capacity and optimization issues vs uclamp_max.
Signed-off-by: Qais Yousef (Google) <qyousef@layalina.io> --- include/trace/events/sched.h | 5 +++++ kernel/sched/core.c | 1 + kernel/sched/fair.c | 7 ++++++- 3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index fbb99a61f714..a13d5d06be9d 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -735,6 +735,11 @@ DECLARE_TRACE(sched_update_nr_running_tp, TP_PROTO(struct rq *rq, int change), TP_ARGS(rq, change)); +DECLARE_TRACE(sched_compute_energy_tp, + TP_PROTO(struct task_struct *p, int dst_cpu, unsigned long energy, + unsigned long max_util, unsigned long busy_time), + TP_ARGS(p, dst_cpu, energy, max_util, busy_time)); + #endif /* _TRACE_SCHED_H */ /* This part must be outside protection */ diff --git a/kernel/sched/core.c b/kernel/sched/core.c index efe3848978a0..36c60ad9966a 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -114,6 +114,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(sched_overutilized_tp); EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_cfs_tp); EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_se_tp); EXPORT_TRACEPOINT_SYMBOL_GPL(sched_update_nr_running_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_compute_energy_tp); DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index e19a36e7b433..779c285203e3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7604,11 +7604,16 @@ compute_energy(struct energy_env *eenv, struct perf_domain *pd, { unsigned long max_util = eenv_pd_max_util(eenv, pd_cpus, p, dst_cpu); unsigned long busy_time = eenv->pd_busy_time; + unsigned long energy; if (dst_cpu >= 0) busy_time = min(eenv->pd_cap, busy_time + eenv->task_busy_time); - return em_cpu_energy(pd->em_pd, max_util, busy_time, eenv->cpu_cap); + energy = em_cpu_energy(pd->em_pd, max_util, busy_time, eenv->cpu_cap); + + trace_sched_compute_energy_tp(p, dst_cpu, energy, max_util, busy_time); + + return energy; } /* -- 2.34.1
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