sched/core: Optimize update_stats_*()
These functions are already gated by schedstats_enabled(), there is no point in then issuing another static_branch for every individual update in them. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -871,7 +871,7 @@ update_stats_wait_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
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likely(wait_start > prev_wait_start))
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wait_start -= prev_wait_start;
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schedstat_set(se->statistics.wait_start, wait_start);
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__schedstat_set(se->statistics.wait_start, wait_start);
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}
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static inline void
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@ -893,17 +893,17 @@ update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
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* time stamp can be adjusted to accumulate wait time
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* prior to migration.
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*/
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schedstat_set(se->statistics.wait_start, delta);
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__schedstat_set(se->statistics.wait_start, delta);
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return;
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}
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trace_sched_stat_wait(p, delta);
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}
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schedstat_set(se->statistics.wait_max,
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__schedstat_set(se->statistics.wait_max,
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max(schedstat_val(se->statistics.wait_max), delta));
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schedstat_inc(se->statistics.wait_count);
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schedstat_add(se->statistics.wait_sum, delta);
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schedstat_set(se->statistics.wait_start, 0);
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__schedstat_inc(se->statistics.wait_count);
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__schedstat_add(se->statistics.wait_sum, delta);
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__schedstat_set(se->statistics.wait_start, 0);
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}
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static inline void
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@ -928,10 +928,10 @@ update_stats_enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
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delta = 0;
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if (unlikely(delta > schedstat_val(se->statistics.sleep_max)))
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schedstat_set(se->statistics.sleep_max, delta);
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__schedstat_set(se->statistics.sleep_max, delta);
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schedstat_set(se->statistics.sleep_start, 0);
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schedstat_add(se->statistics.sum_sleep_runtime, delta);
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__schedstat_set(se->statistics.sleep_start, 0);
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__schedstat_add(se->statistics.sum_sleep_runtime, delta);
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if (tsk) {
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account_scheduler_latency(tsk, delta >> 10, 1);
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@ -945,15 +945,15 @@ update_stats_enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
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delta = 0;
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if (unlikely(delta > schedstat_val(se->statistics.block_max)))
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schedstat_set(se->statistics.block_max, delta);
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__schedstat_set(se->statistics.block_max, delta);
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schedstat_set(se->statistics.block_start, 0);
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schedstat_add(se->statistics.sum_sleep_runtime, delta);
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__schedstat_set(se->statistics.block_start, 0);
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__schedstat_add(se->statistics.sum_sleep_runtime, delta);
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if (tsk) {
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if (tsk->in_iowait) {
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schedstat_add(se->statistics.iowait_sum, delta);
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schedstat_inc(se->statistics.iowait_count);
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__schedstat_add(se->statistics.iowait_sum, delta);
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__schedstat_inc(se->statistics.iowait_count);
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trace_sched_stat_iowait(tsk, delta);
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}
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@ -1012,10 +1012,10 @@ update_stats_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
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struct task_struct *tsk = task_of(se);
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if (tsk->state & TASK_INTERRUPTIBLE)
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schedstat_set(se->statistics.sleep_start,
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__schedstat_set(se->statistics.sleep_start,
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rq_clock(rq_of(cfs_rq)));
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if (tsk->state & TASK_UNINTERRUPTIBLE)
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schedstat_set(se->statistics.block_start,
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__schedstat_set(se->statistics.block_start,
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rq_clock(rq_of(cfs_rq)));
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}
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}
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@ -33,7 +33,9 @@ rq_sched_info_dequeued(struct rq *rq, unsigned long long delta)
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#define schedstat_enabled() static_branch_unlikely(&sched_schedstats)
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#define __schedstat_inc(var) do { var++; } while (0)
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#define schedstat_inc(var) do { if (schedstat_enabled()) { var++; } } while (0)
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#define __schedstat_add(var, amt) do { var += (amt); } while (0)
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#define schedstat_add(var, amt) do { if (schedstat_enabled()) { var += (amt); } } while (0)
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#define __schedstat_set(var, val) do { var = (val); } while (0)
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#define schedstat_set(var, val) do { if (schedstat_enabled()) { var = (val); } } while (0)
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#define schedstat_val(var) (var)
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#define schedstat_val_or_zero(var) ((schedstat_enabled()) ? (var) : 0)
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@ -51,7 +53,9 @@ rq_sched_info_depart(struct rq *rq, unsigned long long delta)
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#define schedstat_enabled() 0
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#define __schedstat_inc(var) do { } while (0)
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#define schedstat_inc(var) do { } while (0)
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#define __schedstat_add(var, amt) do { } while (0)
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#define schedstat_add(var, amt) do { } while (0)
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#define __schedstat_set(var, val) do { } while (0)
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#define schedstat_set(var, val) do { } while (0)
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#define schedstat_val(var) 0
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#define schedstat_val_or_zero(var) 0
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