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Message-Id: <20201222011131.12326-1-yao.jin@linux.intel.com>
Date: Tue, 22 Dec 2020 09:11:31 +0800
From: Jin Yao <yao.jin@...ux.intel.com>
To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
kan.liang@...el.com, yao.jin@...el.com,
Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH] perf stat: Create '--add-default' option to append default list
The event default list includes the most common events which are widely
used by users. But with -e option, the current perf only counts the events
assigned by -e option. Users may want to collect some extra events with
the default list. For this case, users have to manually add all the events
from the default list. It's inconvenient. Also, users may don't know how to
get the default list.
It's better to add a new option to append default list to the -e events.
The new option is '--add-default'.
Before:
root@...-ppc:~# ./perf stat -e power/energy-pkg/ -a -- sleep 1
Performance counter stats for 'system wide':
2.05 Joules power/energy-pkg/
1.000857974 seconds time elapsed
After:
root@...-ppc:~# ./perf stat -e power/energy-pkg/ -a --add-default -- sleep 1
Performance counter stats for 'system wide':
2.10 Joules power/energy-pkg/ # 0.000 K/sec
8,009.89 msec cpu-clock # 7.995 CPUs utilized
140 context-switches # 0.017 K/sec
9 cpu-migrations # 0.001 K/sec
66 page-faults # 0.008 K/sec
10,671,929 cycles # 0.001 GHz
4,736,880 instructions # 0.44 insn per cycle
942,951 branches # 0.118 M/sec
76,096 branch-misses # 8.07% of all branches
1.001809960 seconds time elapsed
Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
tools/perf/Documentation/perf-stat.txt | 5 +++++
tools/perf/builtin-stat.c | 4 +++-
tools/perf/util/stat.h | 1 +
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 5d4a673d7621..75a83c2e4dc5 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -438,6 +438,11 @@ convenient for post processing.
--summary::
Print summary for interval mode (-I).
+--add-default::
+The default event list includes the most common events which are widely
+used by users. But with -e option, the perf only counts the events assigned
+by -e option. This options appends the default event list to the -e events.
+
EXAMPLES
--------
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 89c32692f40c..6ac7b946f9a7 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1173,6 +1173,8 @@ static struct option stat_options[] = {
"print summary for interval mode"),
OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
"don't print output (useful with record)"),
+ OPT_BOOLEAN(0, "add-default", &stat_config.add_default,
+ "add default events"),
#ifdef HAVE_LIBPFM
OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
"libpfm4 event selector. use 'perf list' to list available events",
@@ -1755,7 +1757,7 @@ static int add_default_attributes(void)
free(str);
}
- if (!evsel_list->core.nr_entries) {
+ if (!evsel_list->core.nr_entries || stat_config.add_default) {
if (target__has_cpu(&target))
default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 9979b4b100f2..6ccc6936348c 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -123,6 +123,7 @@ struct perf_stat_config {
bool metric_no_merge;
bool stop_read_counter;
bool quiet;
+ bool add_default;
FILE *output;
unsigned int interval;
unsigned int timeout;
--
2.17.1
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