Messages in this thread Patch in this message | | | From | Qais Yousef <> | Subject | [PATCH 5/7] sched: Add sched_load_se tracepoint | Date | Sun, 5 May 2019 12:57:30 +0100 |
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The new tracepoint allows tracking PELT signals at sched_entity level. Which is supported in CFS tasks and taskgroups only.
Signed-off-by: Qais Yousef <qais.yousef@arm.com> --- include/trace/events/sched.h | 4 ++++ kernel/sched/fair.c | 1 + kernel/sched/pelt.c | 2 ++ kernel/sched/sched_tracepoints.h | 13 +++++++++++++ 4 files changed, 20 insertions(+)
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 2be4c471c6e9..0933c08cfc7e 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -596,6 +596,10 @@ DECLARE_TRACE(sched_load_rq, TP_PROTO(int cpu, const char *path, struct sched_avg *avg), TP_ARGS(cpu, path, avg)); +DECLARE_TRACE(sched_load_se, + TP_PROTO(int cpu, const char *path, struct sched_entity *se), + TP_ARGS(cpu, path, se)); + #endif /* _TRACE_SCHED_H */ /* This part must be outside protection */ diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index e1e0cc7db7f6..3fd306079b57 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3139,6 +3139,7 @@ static inline int propagate_entity_load_avg(struct sched_entity *se) update_tg_cfs_runnable(cfs_rq, se, gcfs_rq); sched_tp_load_cfs_rq(cfs_rq); + sched_tp_load_se(se); return 1; } diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c index 302affb14302..74e7bd121324 100644 --- a/kernel/sched/pelt.c +++ b/kernel/sched/pelt.c @@ -266,6 +266,7 @@ int __update_load_avg_blocked_se(u64 now, struct sched_entity *se) { if (___update_load_sum(now, &se->avg, 0, 0, 0)) { ___update_load_avg(&se->avg, se_weight(se), se_runnable(se)); + sched_tp_load_se(se); return 1; } @@ -279,6 +280,7 @@ int __update_load_avg_se(u64 now, struct cfs_rq *cfs_rq, struct sched_entity *se ___update_load_avg(&se->avg, se_weight(se), se_runnable(se)); cfs_se_util_change(&se->avg); + sched_tp_load_se(se); return 1; } diff --git a/kernel/sched/sched_tracepoints.h b/kernel/sched/sched_tracepoints.h index f4ded705118e..4a53578c9a69 100644 --- a/kernel/sched/sched_tracepoints.h +++ b/kernel/sched/sched_tracepoints.h @@ -37,3 +37,16 @@ static __always_inline void sched_tp_load_dl_rq(struct rq *rq) trace_sched_load_rq(cpu, NULL, &rq->avg_dl); } } + +static __always_inline void sched_tp_load_se(struct sched_entity *se) +{ + if (trace_sched_load_se_enabled()) { + struct cfs_rq *gcfs_rq = group_cfs_rq(se); + struct cfs_rq *cfs_rq = cfs_rq_of(se); + char path[SCHED_TP_PATH_LEN]; + int cpu = cpu_of(rq_of(cfs_rq)); + + cfs_rq_tg_path(gcfs_rq, path, SCHED_TP_PATH_LEN); + trace_sched_load_se(cpu, path, se); + } +} -- 2.17.1
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