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authorTaeung Song <treeze.taeung@gmail.com>2016-11-04 09:44:17 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-11-14 18:52:17 +0300
commit909236083ee58399b371d085fef5cfac9bce3ec8 (patch)
treeb996bab823eca9beeaf66fcf22231df017db0511 /tools
parent8c9c3d2f950cca57f5fa9330c4d15d8f0dfda092 (diff)
downloadlinux-909236083ee58399b371d085fef5cfac9bce3ec8.tar.xz
perf config: Add support for getting config key-value pairs
Add a functionality getting specific config key-value pairs. For the syntax examples, perf config [<file-option>] [section.name ...] e.g. To query config items 'report.queue-size' and 'report.children', do # perf config report.queue-size report.children Signed-off-by: Taeung Song <treeze.taeung@gmail.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Nambong Ha <over3025@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Wookje Kwon <aweee0@gmail.com> Link: http://lkml.kernel.org/r/1478241862-31230-2-git-send-email-treeze.taeung@gmail.com [ Combined patch with docs update with this one ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-config.txt18
-rw-r--r--tools/perf/builtin-config.c40
2 files changed, 55 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index cb081ac59fd1..1714b0c8c8e1 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -8,6 +8,8 @@ perf-config - Get and set variables in a configuration file.
SYNOPSIS
--------
[verse]
+'perf config' [<file-option>] [section.name ...]
+or
'perf config' [<file-option>] -l | --list
DESCRIPTION
@@ -118,6 +120,22 @@ Given a $HOME/.perfconfig like this:
children = true
group = true
+To query the record mode of call graph, do
+
+ % perf config call-graph.record-mode
+
+If you want to know multiple config key/value pairs, you can do like
+
+ % perf config report.queue-size call-graph.order report.children
+
+To query the config value of sort order of call graph in user config file (i.e. `~/.perfconfig`), do
+
+ % perf config --user call-graph.sort-order
+
+To query the config value of buildid directory in system config file (i.e. `$(sysconf)/perfconfig`), do
+
+ % perf config --system buildid.dir
+
Variables
~~~~~~~~~
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index e4207a23b52c..df3fa1c18e55 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -17,7 +17,7 @@
static bool use_system_config, use_user_config;
static const char * const config_usage[] = {
- "perf config [<file-option>] [options]",
+ "perf config [<file-option>] [options] [section.name ...]",
NULL
};
@@ -33,6 +33,36 @@ static struct option config_options[] = {
OPT_END()
};
+static int show_spec_config(struct perf_config_set *set, const char *var)
+{
+ struct perf_config_section *section;
+ struct perf_config_item *item;
+
+ if (set == NULL)
+ return -1;
+
+ perf_config_items__for_each_entry(&set->sections, section) {
+ if (prefixcmp(var, section->name) != 0)
+ continue;
+
+ perf_config_items__for_each_entry(&section->items, item) {
+ const char *name = var + strlen(section->name) + 1;
+
+ if (strcmp(name, item->name) == 0) {
+ char *value = item->value;
+
+ if (value) {
+ printf("%s=%s\n", var, value);
+ return 0;
+ }
+ }
+
+ }
+ }
+
+ return 0;
+}
+
static int show_config(struct perf_config_set *set)
{
struct perf_config_section *section;
@@ -54,7 +84,7 @@ static int show_config(struct perf_config_set *set)
int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
{
- int ret = 0;
+ int i, ret = 0;
struct perf_config_set *set;
char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
@@ -100,7 +130,11 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
}
break;
default:
- usage_with_options(config_usage, config_options);
+ if (argc)
+ for (i = 0; argv[i]; i++)
+ ret = show_spec_config(set, argv[i]);
+ else
+ usage_with_options(config_usage, config_options);
}
perf_config_set__delete(set);