[PATCH V10 4/8] perf,tools: Dump per-sample freq/CPU%/CORE_BUSY% in report -D
From: kan . liang
Date: Wed Sep 16 2015 - 17:39:37 EST
From: Kan Liang <kan.liang@xxxxxxxxx>
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 <kan.liang@xxxxxxxxx>
---
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
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