From: Kan Liang <[email protected]> The value from cycles/ref-cycles/TSC/ASTATE/MSTATE event in perf_sample can be used to calculate the frequency, CPU Utilization and percent performance during each sampling period. This patch shows them in report -D.
Here is an example: $ perf record --perf-freq ~/tchain_edit Here is one sample from perf report -D 1972044565107 0x3498 [0x88]: PERF_RECORD_SAMPLE(IP, 0x2): 10608/10608: 0x4005fd period: 564686 addr: 0 ... sample_read: .... group nr 5 ..... id 0000000000000012, value 0000000002143901 ..... id 0000000000000052, value 0000000002143896 ..... id 0000000000000094, value 00000000021e443d ..... id 00000000000000d4, value 00000000021db984 ..... id 0000000000000114, value 00000000021db964 ..... Freq 2301 MHz ..... CPU% 98% ..... CORE_BUSY% 99% Signed-off-by: Kan Liang <[email protected]> --- tools/perf/util/session.c | 18 ++++++++++++++++-- tools/perf/util/session.h | 27 +++++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index e8cb98d..6ba3a68 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -861,8 +861,12 @@ static void perf_evlist__print_tstamp(struct perf_evlist *evlist, printf("%" PRIu64 " ", sample->time); } -static void sample_read__printf(struct perf_sample *sample, u64 read_format) +static void sample_read__printf(struct perf_sample *sample, + struct perf_evsel *evsel) { + u64 read_format = evsel->attr.read_format; + u64 cpu_max_freq = evsel->evlist->env->cpuattr.max_freq; + printf("... sample_read:\n"); if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) @@ -889,6 +893,16 @@ static void sample_read__printf(struct perf_sample *sample, u64 read_format) } else printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", sample->read.one.id, sample->read.one.value); + + if (perf_freq__has_freq(sample->freq)) + printf("..... Freq %lu MHz\n", + perf_freq__get_freq(sample->freq, cpu_max_freq/1000)); + if (perf_freq__has_cpu_util(sample->freq)) + printf("..... CPU%% %lu%%\n", + perf_freq__get_cpu_util(sample->freq)); + if (perf_freq__has_core_busy(sample->freq)) + printf("..... CORE_BUSY%% %lu%%\n", + perf_freq__get_core_busy(sample->freq)); } static void dump_event(struct perf_evlist *evlist, union perf_event *event, @@ -948,7 +962,7 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event, printf("... transaction: %" PRIx64 "\n", sample->transaction); if (sample_type & PERF_SAMPLE_READ) - sample_read__printf(sample, evsel->attr.read_format); + sample_read__printf(sample, evsel); } static struct machine *machines__find_for_cpumode(struct machines *machines, diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index f70d3a1..0ee3027 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -67,6 +67,33 @@ static inline void perf_freq__init(unsigned int msr_pmu_type, array[PERF_FREQ_REF_CYCLES] = value; } } + +static inline bool perf_freq__has_freq(perf_freq_t array) +{ + return ((array[PERF_FREQ_CYCLES] > 0) && (array[PERF_FREQ_REF_CYCLES] > 0)); +} +static inline u64 perf_freq__get_freq(perf_freq_t array, u64 cpu_max_freq) +{ + return ((array[PERF_FREQ_CYCLES] * cpu_max_freq) / array[PERF_FREQ_REF_CYCLES]); +} +static inline bool perf_freq__has_cpu_util(perf_freq_t array) +{ + return ((array[PERF_FREQ_TSC] > 0) && (array[PERF_FREQ_REF_CYCLES] > 0)); +} +static inline u64 perf_freq__get_cpu_util(perf_freq_t array) +{ + return ((100 * array[PERF_FREQ_REF_CYCLES]) / array[PERF_FREQ_TSC]); +} + +static inline bool perf_freq__has_core_busy(perf_freq_t array) +{ + return ((array[PERF_FREQ_APERF] > 0) && (array[PERF_FREQ_MPERF] > 0)); +} +static inline u64 perf_freq__get_core_busy(perf_freq_t array) +{ + return ((100 * array[PERF_FREQ_APERF]) / array[PERF_FREQ_MPERF]); +} + struct perf_tool; struct perf_session *perf_session__new(struct perf_data_file *file, -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
