diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0078-sched-events-Introduce-task-group-PELT-trace-event-s.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0078-sched-events-Introduce-task-group-PELT-trace-event-s.patch | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0078-sched-events-Introduce-task-group-PELT-trace-event-s.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0078-sched-events-Introduce-task-group-PELT-trace-event-s.patch new file mode 100644 index 0000000..970f2e5 --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0078-sched-events-Introduce-task-group-PELT-trace-event-s.patch @@ -0,0 +1,91 @@ +From cf1dd9ac6f0b61e88c4dbeb57aaee06de5f6a250 Mon Sep 17 00:00:00 2001 +From: Dietmar Eggemann <dietmar.eggemann@arm.com> +Date: Thu, 13 Oct 2016 12:20:12 +0100 +Subject: [PATCH 78/92] sched/events: Introduce task group PELT trace event + sched_pelt_tg() + +The trace event is only defined if symmetric multi-processing +(CONFIG_SMP) and group scheduling support for SCHED_OTHER +(CONFIG_FAIR_GROUP_SCHED) are enabled. + +The cfs_rq owned by the task group is used as the only parameter for the +trace event because it has a reference to the task group and the cpu. +Using the task group as a parameter instead would require the cpu as a +second parameter. + +Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> +(cherry picked from commit 9099eec7854949cf30adf1b5ee026821e1d53e83) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + include/trace/events/sched.h | 33 +++++++++++++++++++++++++++++++++ + kernel/sched/fair.c | 5 ++++- + 2 files changed, 37 insertions(+), 1 deletion(-) + +diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h +index 58ba3d5..e269b04 100644 +--- a/include/trace/events/sched.h ++++ b/include/trace/events/sched.h +@@ -666,6 +666,39 @@ static inline long __trace_sched_switch_state(bool preempt, struct task_struct * + __entry->period_contrib, __entry->last_update_time, + __entry->runnable_load_avg, __entry->runnable_load_sum) + ); ++ ++/* ++ * Tracepoint for task group Per Entity Load Tracking (PELT). ++ */ ++#ifdef CONFIG_FAIR_GROUP_SCHED ++TRACE_EVENT(sched_pelt_tg, ++ ++ TP_PROTO(struct cfs_rq *cfs_rq), ++ ++ TP_ARGS(cfs_rq), ++ ++ TP_STRUCT__entry( ++ __field( int, cpu ) ++ __field( int, id ) ++ __field( long, load_avg ) ++ __field( unsigned long, shares ) ++ __field( unsigned long, tg_load_avg_contrib ) ++ ), ++ ++ TP_fast_assign( ++ __entry->cpu = cfs_rq->rq->cpu; ++ __entry->id = cfs_rq->tg->css.id; ++ __entry->load_avg = atomic_long_read(&cfs_rq->tg->load_avg); ++ __entry->shares = scale_load_down(cfs_rq->tg->shares); ++ __entry->tg_load_avg_contrib = cfs_rq->tg_load_avg_contrib; ++ ), ++ ++ TP_printk("cpu=%d tg_css_id=%d load_avg=%ld shares=%lu" ++ " tg_load_avg_contrib=%lu", ++ __entry->cpu, __entry->id, __entry->load_avg, ++ __entry->shares, __entry->tg_load_avg_contrib) ++); ++#endif /* CONFIG_FAIR_GROUP_SCHED */ + #endif /* CONFIG_SMP */ + #endif /* _TRACE_SCHED_H */ + +diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c +index fffe7cb..3563486 100644 +--- a/kernel/sched/fair.c ++++ b/kernel/sched/fair.c +@@ -2985,12 +2985,15 @@ static inline void update_tg_load_avg(struct cfs_rq *cfs_rq, int force) + * No need to update load_avg for root_task_group as it is not used. + */ + if (cfs_rq->tg == &root_task_group) +- return; ++ goto trace; + + if (force || abs(delta) > cfs_rq->tg_load_avg_contrib / 64) { + atomic_long_add(delta, &cfs_rq->tg->load_avg); + cfs_rq->tg_load_avg_contrib = cfs_rq->avg.load_avg; + } ++ ++trace: ++ trace_sched_pelt_tg(cfs_rq); + } + + /* +-- +1.9.1 + |