diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2022-05-10 21:28:18 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-09-07 21:54:03 +0200 |
| commit | 08b3068fab207e3c7d79799d434e1d648524cac6 (patch) | |
| tree | 2c8734b81089c35498640beaf21a0366ed62b9f4 /arch/x86/events/core.c | |
| parent | 28f0f3c44b5c35be657a4f922dcdfb48285f4373 (diff) | |
perf/x86: Add a x86_pmu::limit_period static_call
Avoid a branch and indirect call.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220829101321.640658334@infradead.org
Diffstat (limited to 'arch/x86/events/core.c')
| -rw-r--r-- | arch/x86/events/core.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 1e90bc7ca36f..05830bb77d40 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -72,8 +72,9 @@ DEFINE_STATIC_CALL_NULL(x86_pmu_add, *x86_pmu.add); DEFINE_STATIC_CALL_NULL(x86_pmu_del, *x86_pmu.del); DEFINE_STATIC_CALL_NULL(x86_pmu_read, *x86_pmu.read); -DEFINE_STATIC_CALL_NULL(x86_pmu_set_period, *x86_pmu.set_period); -DEFINE_STATIC_CALL_NULL(x86_pmu_update, *x86_pmu.update); +DEFINE_STATIC_CALL_NULL(x86_pmu_set_period, *x86_pmu.set_period); +DEFINE_STATIC_CALL_NULL(x86_pmu_update, *x86_pmu.update); +DEFINE_STATIC_CALL_NULL(x86_pmu_limit_period, *x86_pmu.limit_period); DEFINE_STATIC_CALL_NULL(x86_pmu_schedule_events, *x86_pmu.schedule_events); DEFINE_STATIC_CALL_NULL(x86_pmu_get_event_constraints, *x86_pmu.get_event_constraints); @@ -1396,8 +1397,7 @@ int x86_perf_event_set_period(struct perf_event *event) if (left > x86_pmu.max_period) left = x86_pmu.max_period; - if (x86_pmu.limit_period) - x86_pmu.limit_period(event, &left); + static_call_cond(x86_pmu_limit_period)(event, &left); this_cpu_write(pmc_prev_left[idx], left); @@ -2024,6 +2024,7 @@ static void x86_pmu_static_call_update(void) static_call_update(x86_pmu_set_period, x86_pmu.set_period); static_call_update(x86_pmu_update, x86_pmu.update); + static_call_update(x86_pmu_limit_period, x86_pmu.limit_period); static_call_update(x86_pmu_schedule_events, x86_pmu.schedule_events); static_call_update(x86_pmu_get_event_constraints, x86_pmu.get_event_constraints); |