perf_counter: Add PERF_SAMPLE_PERIOD
In order to allow easy tracking of the period, also provide means of adding it to the sample data. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>hifive-unleashed-5.1
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ac4bcf8894
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@ -106,6 +106,7 @@ enum perf_counter_sample_format {
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PERF_SAMPLE_CALLCHAIN = 1U << 5,
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PERF_SAMPLE_CALLCHAIN = 1U << 5,
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PERF_SAMPLE_ID = 1U << 6,
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PERF_SAMPLE_ID = 1U << 6,
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PERF_SAMPLE_CPU = 1U << 7,
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PERF_SAMPLE_CPU = 1U << 7,
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PERF_SAMPLE_PERIOD = 1U << 8,
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};
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};
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/*
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/*
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@ -260,6 +261,7 @@ enum perf_event_type {
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* struct {
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* struct {
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* struct perf_event_header header;
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* struct perf_event_header header;
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* u64 time;
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* u64 time;
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* u64 id;
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* u64 sample_period;
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* u64 sample_period;
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* };
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* };
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*/
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*/
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@ -2404,6 +2404,11 @@ static void perf_counter_output(struct perf_counter *counter,
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cpu_entry.cpu = raw_smp_processor_id();
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cpu_entry.cpu = raw_smp_processor_id();
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}
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}
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if (sample_type & PERF_SAMPLE_PERIOD) {
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header.type |= PERF_SAMPLE_PERIOD;
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header.size += sizeof(u64);
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}
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if (sample_type & PERF_SAMPLE_GROUP) {
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if (sample_type & PERF_SAMPLE_GROUP) {
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header.type |= PERF_SAMPLE_GROUP;
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header.type |= PERF_SAMPLE_GROUP;
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header.size += sizeof(u64) +
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header.size += sizeof(u64) +
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@ -2445,6 +2450,9 @@ static void perf_counter_output(struct perf_counter *counter,
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if (sample_type & PERF_SAMPLE_CPU)
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if (sample_type & PERF_SAMPLE_CPU)
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perf_output_put(&handle, cpu_entry);
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perf_output_put(&handle, cpu_entry);
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if (sample_type & PERF_SAMPLE_PERIOD)
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perf_output_put(&handle, counter->hw.sample_period);
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/*
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/*
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* XXX PERF_SAMPLE_GROUP vs inherited counters seems difficult.
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* XXX PERF_SAMPLE_GROUP vs inherited counters seems difficult.
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*/
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*/
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@ -2835,6 +2843,7 @@ static void perf_log_period(struct perf_counter *counter, u64 period)
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struct {
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struct {
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struct perf_event_header header;
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struct perf_event_header header;
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u64 time;
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u64 time;
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u64 id;
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u64 period;
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u64 period;
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} freq_event = {
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} freq_event = {
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.header = {
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.header = {
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@ -2843,6 +2852,7 @@ static void perf_log_period(struct perf_counter *counter, u64 period)
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.size = sizeof(freq_event),
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.size = sizeof(freq_event),
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},
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},
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.time = sched_clock(),
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.time = sched_clock(),
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.id = counter->id,
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.period = period,
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.period = period,
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};
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};
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