diff options
| author | Yafang Shao <laoar.shao@gmail.com> | 2025-01-03 10:24:06 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-01-13 14:10:25 +0100 |
| commit | 8722903cbb8f0d51057fbf9ef1c680756b74119e (patch) | |
| tree | 7dabad538e408c65a8c4eae1f24d3b8dab138394 /kernel/sched/sched.h | |
| parent | 3229adbe787534b43430f92e10175c9b77f2d27c (diff) | |
sched: Define sched_clock_irqtime as static key
Since CPU time accounting is a performance-critical path, let's define
sched_clock_irqtime as a static key to minimize potential overhead.
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20250103022409.2544-2-laoar.shao@gmail.com
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 300db6fe53eb..3da237c934e7 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -3233,6 +3233,12 @@ struct irqtime { }; DECLARE_PER_CPU(struct irqtime, cpu_irqtime); +DECLARE_STATIC_KEY_FALSE(sched_clock_irqtime); + +static inline int irqtime_enabled(void) +{ + return static_branch_likely(&sched_clock_irqtime); +} /* * Returns the irqtime minus the softirq time computed by ksoftirqd. @@ -3253,6 +3259,13 @@ static inline u64 irq_time_read(int cpu) return total; } +#else + +static inline int irqtime_enabled(void) +{ + return 0; +} + #endif /* CONFIG_IRQ_TIME_ACCOUNTING */ #ifdef CONFIG_CPU_FREQ |