| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20220721043644.153718-6-namhyung@kernel.org>
Date: Wed, 20 Jul 2022 21:36:43 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
Jiri Olsa <jolsa@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
LKML <linux-kernel@...r.kernel.org>,
Ian Rogers <irogers@...gle.com>,
linux-perf-users@...r.kernel.org, Will Deacon <will@...nel.org>,
Waiman Long <longman@...hat.com>,
Boqun Feng <boqun.feng@...il.com>,
Davidlohr Bueso <dave@...olabs.net>
Subject: [PATCH 5/6] perf lock: Add -k and -F options to 'contention' subcommand
Like perf lock report, add -k/--key and -F/--field options to control
output formatting and sorting. Note that it has slightly different
default options as some fields are not available and to optimize the
screen space.
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/Documentation/perf-lock.txt | 15 ++++++++
tools/perf/builtin-lock.c | 51 ++++++++++++++++++++------
2 files changed, 55 insertions(+), 11 deletions(-)
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index da0bcbc676a3..ae78e04346bd 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -105,6 +105,21 @@ INFO OPTIONS
--map::
dump map of lock instances (address:name table)
+CONTENTION OPTIONS
+--------------
+
+-k::
+--key=<value>::
+ Sorting key. Possible values: contended, wait_total (default),
+ wait_max, wait_min, avg_wait.
+
+-F::
+--field=<value>::
+ Output fields. By default it shows all but the wait_min fields
+ and users can customize that using this. Possible values:
+ contended, wait_total, wait_max, wait_min, avg_wait.
+
+
SEE ALSO
--------
linkperf:perf[1]
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 64f635273660..ad3b191db2e7 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -362,7 +362,7 @@ static const char *output_fields;
#define DEF_KEY_LOCK(name, header, fn_suffix, len) \
{ #name, header, len, lock_stat_key_ ## fn_suffix, lock_stat_key_print_ ## fn_suffix, {} }
-struct lock_key keys[] = {
+static struct lock_key report_keys[] = {
DEF_KEY_LOCK(acquired, "acquired", nr_acquired, 10),
DEF_KEY_LOCK(contended, "contended", nr_contended, 10),
DEF_KEY_LOCK(avg_wait, "avg wait", avg_wait_time, 12),
@@ -374,9 +374,24 @@ struct lock_key keys[] = {
{ }
};
-static int select_key(void)
+static struct lock_key contention_keys[] = {
+ DEF_KEY_LOCK(contended, "contended", nr_contended, 10),
+ DEF_KEY_LOCK(wait_total, "total wait", wait_time_total, 12),
+ DEF_KEY_LOCK(wait_max, "max wait", wait_time_max, 12),
+ DEF_KEY_LOCK(wait_min, "min wait", wait_time_min, 12),
+ DEF_KEY_LOCK(avg_wait, "avg wait", avg_wait_time, 12),
+
+ /* extra comparisons much complicated should be here */
+ { }
+};
+
+static int select_key(bool contention)
{
int i;
+ struct lock_key *keys = report_keys;
+
+ if (contention)
+ keys = contention_keys;
for (i = 0; keys[i].name; i++) {
if (!strcmp(keys[i].name, sort_key)) {
@@ -394,9 +409,13 @@ static int select_key(void)
return -1;
}
-static int add_output_field(struct list_head *head, char *name)
+static int add_output_field(bool contention, char *name)
{
int i;
+ struct lock_key *keys = report_keys;
+
+ if (contention)
+ keys = contention_keys;
for (i = 0; keys[i].name; i++) {
if (strcmp(keys[i].name, name))
@@ -404,7 +423,7 @@ static int add_output_field(struct list_head *head, char *name)
/* prevent double link */
if (list_empty(&keys[i].list))
- list_add_tail(&keys[i].list, head);
+ list_add_tail(&keys[i].list, &lock_keys);
return 0;
}
@@ -413,10 +432,14 @@ static int add_output_field(struct list_head *head, char *name)
return -1;
}
-static int setup_output_field(const char *str)
+static int setup_output_field(bool contention, const char *str)
{
char *tok, *tmp, *orig;
int i, ret = 0;
+ struct lock_key *keys = report_keys;
+
+ if (contention)
+ keys = contention_keys;
/* no output field given: use all of them */
if (str == NULL) {
@@ -433,7 +456,7 @@ static int setup_output_field(const char *str)
return -ENOMEM;
while ((tok = strsep(&tmp, ",")) != NULL){
- ret = add_output_field(&lock_keys, tok);
+ ret = add_output_field(contention, tok);
if (ret < 0)
break;
}
@@ -1609,10 +1632,10 @@ static int __cmd_report(bool display_info)
goto out_delete;
}
- if (setup_output_field(output_fields))
+ if (setup_output_field(false, output_fields))
goto out_delete;
- if (select_key())
+ if (select_key(false))
goto out_delete;
if (show_thread_stats)
@@ -1674,11 +1697,10 @@ static int __cmd_contention(void)
goto out_delete;
}
- if (setup_output_field("contended,wait_total,wait_max,avg_wait"))
+ if (setup_output_field(true, output_fields))
goto out_delete;
- sort_key = "wait_total";
- if (select_key())
+ if (select_key(true))
goto out_delete;
aggr_mode = LOCK_AGGR_CALLER;
@@ -1817,6 +1839,10 @@ int cmd_lock(int argc, const char **argv)
};
const struct option contention_options[] = {
+ OPT_STRING('k', "key", &sort_key, "wait_total",
+ "key for sorting (contended / wait_total / wait_max / wait_min / avg_wait)"),
+ OPT_STRING('F', "field", &output_fields, "contended,wait_total,wait_max,avg_wait",
+ "output fields (contended / wait_total / wait_max / wait_min / avg_wait)"),
OPT_PARENT(lock_options)
};
@@ -1876,6 +1902,9 @@ int cmd_lock(int argc, const char **argv)
rc = __cmd_report(true);
} else if (strlen(argv[0]) > 2 && strstarts("contention", argv[0])) {
trace_handler = &contention_lock_ops;
+ sort_key = "wait_total";
+ output_fields = "contended,wait_total,wait_max,avg_wait";
+
if (argc) {
argc = parse_options(argc, argv, contention_options,
contention_usage, 0);
--
2.37.0.170.g444d1eabd0-goog
Powered by blists - more mailing lists