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perf/core: Add the is_event_in_freq_mode() helper to simplify the code

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Add a helper to check if an event is in freq mode to improve readability.

No functional changes.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250516182853.2610284-2-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang
2025-05-16 11:28:38 -07:00
committed by Ingo Molnar
parent 75a9001bab
commit ca559503b8
1 changed files with 10 additions and 5 deletions
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15
kernel/events/core.c
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@@ -2351,6 +2351,11 @@ event_filter_match(struct perf_event *event)
perf_cgroup_match(event);
}
static inline bool is_event_in_freq_mode(struct perf_event *event)
{
return event->attr.freq && event->attr.sample_freq;
}
static void
event_sched_out(struct perf_event *event, struct perf_event_context *ctx)
{
@@ -2388,7 +2393,7 @@ event_sched_out(struct perf_event *event, struct perf_event_context *ctx)
if (!is_software_event(event))
cpc->active_oncpu--;
if (event->attr.freq && event->attr.sample_freq) {
if (is_event_in_freq_mode(event)) {
ctx->nr_freq--;
epc->nr_freq--;
}
@@ -2686,7 +2691,7 @@ event_sched_in(struct perf_event *event, struct perf_event_context *ctx)
if (!is_software_event(event))
cpc->active_oncpu++;
if (event->attr.freq && event->attr.sample_freq) {
if (is_event_in_freq_mode(event)) {
ctx->nr_freq++;
epc->nr_freq++;
}
@@ -4252,11 +4257,11 @@ static void perf_adjust_freq_unthr_events(struct list_head *event_list)
if (hwc->interrupts == MAX_INTERRUPTS) {
hwc->interrupts = 0;
perf_log_throttle(event, 1);
if (!event->attr.freq || !event->attr.sample_freq)
if (!is_event_in_freq_mode(event))
event->pmu->start(event, 0);
}
if (!event->attr.freq || !event->attr.sample_freq)
if (!is_event_in_freq_mode(event))
continue;
/*
@@ -12848,7 +12853,7 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
hwc = &event->hw;
hwc->sample_period = attr->sample_period;
if (attr->freq && attr->sample_freq)
if (is_event_in_freq_mode(event))
hwc->sample_period = 1;
hwc->last_period = hwc->sample_period;