From: Kan Liang <kan.li...@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 --freq-perf ~/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.li...@intel.com>
Acked-by: Jiri Olsa <jo...@kernel.org>
---
tools/perf/util/session.c | 28 +++++++++++++++++++++---
tools/perf/util/session.h | 54 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 79 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 23fed17..ba763f7 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -7,7 +7,6 @@
#include <sys/mman.h>
#include "evlist.h"
-#include "evsel.h"
#include "session.h"
#include "tool.h"
#include "sort.h"
@@ -878,8 +877,15 @@ 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;
+ struct perf_evlist *evlist = evsel->evlist;
+ struct perf_sample_id *sid;
+ perf_freq_t data = { 0 };
+ u64 cpu_max_freq = evlist->env->cpuattr.max_freq;
+
printf("... sample_read:\n");
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
@@ -902,10 +908,26 @@ 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)
+ perf_freq__init(evlist->env->msr_pmu_type,
+ evsel, data, value->value);
}
} else
printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
sample->read.one.id, sample->read.one.value);
+
+ if (perf_freq__has_freq(data))
+ printf("..... Freq %lu MHz\n",
+ perf_freq__get_freq(data, cpu_max_freq/1000));
+ if (perf_freq__has_cpu_util(data))
+ printf("..... CPU%% %lu%%\n",
+ perf_freq__get_cpu_util(data));
+ if (perf_freq__has_core_busy(data))
+ printf("..... CORE_BUSY%% %lu%%\n",
+ perf_freq__get_core_busy(data));
}
static void dump_event(struct perf_evlist *evlist, union perf_event *event,
@@ -965,7 +987,7 @@ 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 3915be7..83bf4a9 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -11,6 +11,7 @@
#include "ordered-events.h"
#include <linux/rbtree.h>
#include <linux/perf_event.h>
+#include "evsel.h"
struct ip_callchain;
struct thread;
@@ -42,6 +43,10 @@ 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,
@@ -52,6 +57,55 @@ enum perf_freq_perf_index {
FREQ_PERF_MAX
};
+typedef u64 perf_freq_t[FREQ_PERF_MAX];
+
+static inline void perf_freq__init(unsigned int msr_pmu_type,
+ struct perf_evsel *evsel,
+ perf_freq_t array,
+ u64 value)
+{
+ if (evsel->attr.type == msr_pmu_type) {
+ if (evsel->attr.config == PERF_MSR_TSC)
+ array[FREQ_PERF_TSC] = value;
+ if (evsel->attr.config == PERF_MSR_APERF)
+ array[FREQ_PERF_APERF] = value;
+ if (evsel->attr.config == PERF_MSR_MPERF)
+ array[FREQ_PERF_MPERF] = value;
+ }
+ if (evsel->attr.type == PERF_TYPE_HARDWARE) {
+ if (evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES)
+ array[FREQ_PERF_CYCLES] = value;
+ if (evsel->attr.config == PERF_COUNT_HW_REF_CPU_CYCLES)
+ array[FREQ_PERF_REF_CYCLES] = value;
+ }
+}
+
+static inline bool perf_freq__has_freq(perf_freq_t array)
+{
+ return ((array[FREQ_PERF_CYCLES] > 0) && (array[FREQ_PERF_REF_CYCLES] >
0));
+}
+static inline u64 perf_freq__get_freq(perf_freq_t array, u64 cpu_max_freq)
+{
+ return ((array[FREQ_PERF_CYCLES] * cpu_max_freq) /
array[FREQ_PERF_REF_CYCLES]);
+}
+static inline bool perf_freq__has_cpu_util(perf_freq_t array)
+{
+ return ((array[FREQ_PERF_TSC] > 0) && (array[FREQ_PERF_REF_CYCLES] >
0));
+}
+static inline u64 perf_freq__get_cpu_util(perf_freq_t array)
+{
+ return ((100 * array[FREQ_PERF_REF_CYCLES]) / array[FREQ_PERF_TSC]);
+}
+
+static inline bool perf_freq__has_core_busy(perf_freq_t array)
+{
+ return ((array[FREQ_PERF_APERF] > 0) && (array[FREQ_PERF_MPERF] > 0));
+}
+static inline u64 perf_freq__get_core_busy(perf_freq_t array)
+{
+ return ((100 * array[FREQ_PERF_APERF]) / array[FREQ_PERF_MPERF]);
+}
+
struct perf_tool;
struct perf_session *perf_session__new(struct perf_data_file *file,
--
1.8.3.1
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