lkml.org 
[lkml]   [2015]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V2 3/6] perf,tools: Dump per-sample freq/CPU%/CORE_BUSY% in report -D
Date
From: Kan Liang <kan.liang@intel.com>

The group read results from cycles/ref-cycles/TSC/ASTATE/MSTATE event
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 -e
'{cycles,ref-cycles,msr/tsc/,msr/mperf/,msr/aperf/}:S' ~/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@intel.com>
---
tools/perf/util/session.c | 33 ++++++++++++++++++++++++++++-----
tools/perf/util/session.h | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index ed9dc25..7f628d9 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -851,8 +851,14 @@ 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_evlist *evlist,
+ struct perf_sample *sample,
+ u64 read_format)
{
+ struct perf_evsel *evsel;
+ struct perf_sample_id *sid;
+ u64 data[FREQ_PERF_MAX] = { 0 };
+
printf("... sample_read:\n");

if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
@@ -875,10 +881,26 @@ static void sample_read__printf(struct perf_sample *sample, u64 read_format)
printf("..... id %016" PRIx64
", value %016" PRIx64 "\n",
value->id, value->value);
+
+ sid = perf_evlist__id2sid(evlist, value->id);
+ evsel = sid->evsel;
+ if (evsel != NULL)
+ SET_FREQ_PERF_VALUE(evsel, data,
+ value->value);
}
} else
printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
sample->read.one.id, sample->read.one.value);
+
+ if (HAS_FREQ(data))
+ printf("..... Freq %lu MHz\n",
+ (data[FREQ_PERF_CYCLES] * cpu_max_freq) / data[FREQ_PERF_REF_CYCLES]);
+ if (HAS_CPU_U(data))
+ printf("..... CPU%% %lu%%\n",
+ (100 * data[FREQ_PERF_REF_CYCLES]) / data[FREQ_PERF_TSC]);
+ if (HAS_CORE_BUSY(data))
+ printf("..... CORE_BUSY%% %lu%%\n",
+ (100 * data[FREQ_PERF_APERF]) / data[FREQ_PERF_MPERF]);
}

static void dump_event(struct perf_evlist *evlist, union perf_event *event,
@@ -899,8 +921,8 @@ static void dump_event(struct perf_evlist *evlist, union perf_event *event,
event->header.size, perf_event__name(event->header.type));
}

-static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
- struct perf_sample *sample)
+static void dump_sample(struct perf_evlist *evlist, struct perf_evsel *evsel,
+ union perf_event *event, struct perf_sample *sample)
{
u64 sample_type;

@@ -938,7 +960,7 @@ 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(evlist, sample, evsel->attr.read_format);
}

static struct machine *machines__find_for_cpumode(struct machines *machines,
@@ -1053,11 +1075,12 @@ static int machines__deliver_event(struct machines *machines,

switch (event->header.type) {
case PERF_RECORD_SAMPLE:
- dump_sample(evsel, event, sample);
if (evsel == NULL) {
++evlist->stats.nr_unknown_id;
return 0;
}
+ dump_sample(evlist, evsel, event, sample);
+
if (machine == NULL) {
++evlist->stats.nr_unprocessable_samples;
return 0;
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index a339338..db218ba 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -43,6 +43,44 @@ struct perf_session {
#define PRINT_IP_OPT_ONELINE (1<<4)
#define PRINT_IP_OPT_SRCLINE (1<<5)

+#define PERF_MSR_TSC 0
+#define PERF_MSR_APERF 1
+#define PERF_MSR_MPERF 2
+
+enum perf_freq_perf_index {
+ FREQ_PERF_TSC = 0,
+ FREQ_PERF_APERF = 1,
+ FREQ_PERF_MPERF = 2,
+ FREQ_PERF_CYCLES = 3,
+ FREQ_PERF_REF_CYCLES = 4,
+
+ FREQ_PERF_MAX
+};
+
+#define SET_FREQ_PERF_VALUE(event, array, value) \
+{ \
+ if (event->attr.type == msr_pmu_type) { \
+ if (event->attr.config == PERF_MSR_TSC) \
+ array[FREQ_PERF_TSC] = value; \
+ if (event->attr.config == PERF_MSR_APERF) \
+ array[FREQ_PERF_APERF] = value; \
+ if (event->attr.config == PERF_MSR_MPERF) \
+ array[FREQ_PERF_MPERF] = value; \
+ } \
+ if (event->attr.type == PERF_TYPE_HARDWARE) { \
+ if (event->attr.config == PERF_COUNT_HW_CPU_CYCLES) \
+ array[FREQ_PERF_CYCLES] = value; \
+ if (event->attr.config == PERF_COUNT_HW_REF_CPU_CYCLES) \
+ array[FREQ_PERF_REF_CYCLES] = value; \
+ } \
+}
+
+#define HAS_FREQ(array) \
+ ((array[FREQ_PERF_CYCLES] > 0) && (array[FREQ_PERF_REF_CYCLES] > 0))
+#define HAS_CPU_U(array) \
+ ((array[FREQ_PERF_TSC] > 0) && (array[FREQ_PERF_REF_CYCLES] > 0))
+#define HAS_CORE_BUSY(array) \
+ ((array[FREQ_PERF_APERF] > 0) && (array[FREQ_PERF_MPERF] > 0))
struct perf_tool;

struct perf_session *perf_session__new(struct perf_data_file *file,
--
1.8.3.1


\
 
 \ /
  Last update: 2015-07-24 23:21    [W:1.139 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site