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Message-Id: <1589991815-17951-1-git-send-email-pc@us.ibm.com>
Date: Wed, 20 May 2020 11:23:35 -0500
From: "Paul A. Clarke" <pc@...ibm.com>
To: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
acme@...nel.org
Subject: [PATCH v2] perf config: Add stat.big-num support
From: "Paul A. Clarke" <pc@...ibm.com>
Add support for new "stat.big-num" boolean option.
This allows a user to set a default for "--no-big-num" for "perf stat"
commands.
--
$ perf config stat.big-num
$ perf stat --event cycles /bin/true
Performance counter stats for '/bin/true':
778,849 cycles
[...]
$ perf config stat.big-num=false
$ perf config stat.big-num
stat.big-num=false
$ perf stat --event cycles /bin/true
Performance counter stats for '/bin/true':
769622 cycles
[...]
--
There is an interaction with "--field-separator" that must be
accommodated, such that specifying "--big-num --field-separator={x}"
still reports an invalid combination of options.
Documentation for perf-config and perf-stat updated.
Signed-off-by: Paul A. Clarke <pc@...ibm.com>
---
v2:
- Documentation updates for perf-config and perf-stat.
- Changed from using 0/1 to false/true in the examples and documentation.
Testing results with a matrix of:
- nothing in .perfconfig, stat.big-num=false, stat.big-num=true
- --field-separator not set, --field-separator=:
- no "--big-num", --big-num, --no-big-num
$ perf config stat.big-num
$ perf stat --event cycles /bin/true
Performance counter stats for '/bin/true':
778,849 cycles
0.000570037 seconds time elapsed
0.000619000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --big-num /bin/true
Performance counter stats for '/bin/true':
763,003 cycles
0.000546281 seconds time elapsed
0.000597000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --no-big-num /bin/true
Performance counter stats for '/bin/true':
810753 cycles
0.000582670 seconds time elapsed
0.000638000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --field-separator=: /bin/true
759523::cycles:333196:100.00::
$ perf stat --event cycles --big-num --field-separator=: /bin/true
-B option not supported with -x
Usage: perf stat [<options>] [<command>]
-B, --big-num print large numbers with thousands' separators
-x, --field-separator <separator>
print counts with custom separator
$ perf stat --event cycles --no-big-num --field-separator=: /bin/true
782610::cycles:343606:100.00::
$ perf config stat.big-num=false
$ perf config stat.big-num
stat.big-num=false
$ perf stat --event cycles /bin/true
Performance counter stats for '/bin/true':
769622 cycles
0.000545743 seconds time elapsed
0.000600000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --big-num /bin/true
Performance counter stats for '/bin/true':
788,694 cycles
0.000565276 seconds time elapsed
0.000622000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --no-big-num /bin/true
Performance counter stats for '/bin/true':
808283 cycles
0.000575508 seconds time elapsed
0.000632000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --field-separator=: /bin/true
809296::cycles:355486:100.00::
$ perf stat --event cycles --big-num --field-separator=: /bin/true
-B option not supported with -x
Usage: perf stat [<options>] [<command>]
-B, --big-num print large numbers with thousands' separators
-x, --field-separator <separator>
print counts with custom separator
$ perf stat --event cycles --no-big-num --field-separator=: /bin/true
795679::cycles:349824:100.00::
$ perf config stat.big-num=true
$ perf config stat.big-num
stat.big-num=true
$ perf stat --event cycles /bin/true
Performance counter stats for '/bin/true':
823,114 cycles
0.000577809 seconds time elapsed
0.000643000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --big-num /bin/true
Performance counter stats for '/bin/true':
778,824 cycles
0.000551584 seconds time elapsed
0.000603000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --no-big-num /bin/true
Performance counter stats for '/bin/true':
789190 cycles
0.000574797 seconds time elapsed
0.000637000 seconds user
0.000000000 seconds sys
$ perf stat --event cycles --field-separator=: /bin/true
780405::cycles:343394:100.00::
$ perf stat --event cycles --big-num --field-separator=: /bin/true
-B option not supported with -x
Usage: perf stat [<options>] [<command>]
-B, --big-num print large numbers with thousands' separators
-x, --field-separator <separator>
print counts with custom separator
$ perf stat --event cycles --no-big-num --field-separator=: /bin/true
802656::cycles:353182:100.00::
$
---
tools/perf/Documentation/perf-config.txt | 5 +++++
tools/perf/Documentation/perf-stat.txt | 4 +++-
tools/perf/builtin-stat.c | 6 ++++++
tools/perf/util/config.c | 13 +++++++++++++
tools/perf/util/stat.h | 2 ++
5 files changed, 29 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index f16d8a71d3f5..790003158648 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -667,6 +667,11 @@ convert.*::
Limit the size of ordered_events queue, so we could control
allocation size of perf data files without proper finished
round events.
+stat.*::
+
+ stat.big-num::
+ (boolean) Change the default for "--big-num". To make
+ "--no-big-num" the default, set "stat.big-num=false".
intel-pt.*::
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 3fb5028aef08..77081283856d 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -93,7 +93,9 @@ report::
-B::
--big-num::
- print large numbers with thousands' separators according to locale
+ print large numbers with thousands' separators according to locale.
+ Enabled by default. Use "--no-big-num" to disable.
+ Default setting can be changed with "perf config stat.big-num=false".
-C::
--cpu=::
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index e0c1ad23c768..c39305907940 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -821,10 +821,16 @@ static void sig_atexit(void)
kill(getpid(), signr);
}
+void perf_stat__set_big_num(int set)
+{
+ stat_config.big_num = (set != 0);
+}
+
static int stat__set_big_num(const struct option *opt __maybe_unused,
const char *s __maybe_unused, int unset)
{
big_num_opt = unset ? 0 : 1;
+ perf_stat__set_big_num(!unset);
return 0;
}
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index ef38eba56ed0..8e65f1fa421f 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -17,6 +17,7 @@
#include "util/event.h" /* proc_map_timeout */
#include "util/hist.h" /* perf_hist_config */
#include "util/llvm-utils.h" /* perf_llvm_config */
+#include "util/stat.h" /* perf_stat__set_big_num */
#include "build-id.h"
#include "debug.h"
#include "config.h"
@@ -452,6 +453,15 @@ static int perf_ui_config(const char *var, const char *value)
return 0;
}
+static int perf_stat_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "stat.big-num"))
+ perf_stat__set_big_num(perf_config_bool(var, value));
+
+ /* Add other config variables here. */
+ return 0;
+}
+
int perf_default_config(const char *var, const char *value,
void *dummy __maybe_unused)
{
@@ -473,6 +483,9 @@ int perf_default_config(const char *var, const char *value,
if (strstarts(var, "buildid."))
return perf_buildid_config(var, value);
+ if (strstarts(var, "stat."))
+ return perf_stat_config(var, value);
+
/* Add other config variables here. */
return 0;
}
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index b4fdfaa7f2c0..4bd6dc6cb6aa 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -132,6 +132,8 @@ struct perf_stat_config {
struct rblist metric_events;
};
+void perf_stat__set_big_num(int set);
+
void update_stats(struct stats *stats, u64 val);
double avg_stats(struct stats *stats);
double stddev_stats(struct stats *stats);
--
2.18.2
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