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Subject[PATCH 9/9] perf, tools: Add a --quiet flag to perf list
Date
From: Andi Kleen <ak@linux.intel.com>

Add a --quiet flag to perf list to not print the event descriptions
that were earlier added for JSON events. This may be useful to
get a less crowded listing.

It's still default to print descriptions as that is the more useful
default for most users.

Before:

% perf list
...
baclears.any [Counts the total number when the front end is
resteered, mainly when the BPU cannot provide a
correct prediction and this is corrected by other
branch handling mechanisms at the front end]
br_inst_exec.all_branches [Speculative and retired branches]

After:

% perf list --quiet
...
baclears.any [Kernel PMU event]
br_inst_exec.all_branches [Kernel PMU event]

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/builtin-list.c | 14 +++++++++-----
tools/perf/util/parse-events.c | 4 ++--
tools/perf/util/parse-events.h | 2 +-
tools/perf/util/pmu.c | 4 ++--
tools/perf/util/pmu.h | 2 +-
5 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 086c96f..b064ea4 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -16,16 +16,20 @@
#include "util/pmu.h"
#include "util/parse-options.h"

+static bool quiet_flag;
+
int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
{
int i;
const struct option list_options[] = {
OPT_STRING(0, "events-file", &json_file, "json file",
"Read event json file"),
+ OPT_BOOLEAN('q', "quiet", &quiet_flag,
+ "Don't print extra event descriptions"),
OPT_END()
};
const char * const list_usage[] = {
- "perf list [hw|sw|cache|tracepoint|pmu|event_glob]",
+ "perf list [--events-file FILE] [--quiet] [hw|sw|cache|tracepoint|pmu|event_glob]",
NULL
};

@@ -35,7 +39,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
setup_pager();

if (argc == 0) {
- print_events(NULL, false);
+ print_events(NULL, false, quiet_flag);
return 0;
}

@@ -54,15 +58,15 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
strcmp(argv[i], "hwcache") == 0)
print_hwcache_events(NULL, false);
else if (strcmp(argv[i], "pmu") == 0)
- print_pmu_events(NULL, false);
+ print_pmu_events(NULL, false, quiet_flag);
else if (strcmp(argv[i], "--raw-dump") == 0)
- print_events(NULL, true);
+ print_events(NULL, true, quiet_flag);
else {
char *sep = strchr(argv[i], ':'), *s;
int sep_idx;

if (sep == NULL) {
- print_events(argv[i], false);
+ print_events(argv[i], false, quiet_flag);
continue;
}
sep_idx = sep - argv[i];
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 1e15df1..e2badf3 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1231,7 +1231,7 @@ static void print_symbol_events(const char *event_glob, unsigned type,
/*
* Print the help text for the event symbols:
*/
-void print_events(const char *event_glob, bool name_only)
+void print_events(const char *event_glob, bool name_only, bool quiet)
{
if (!name_only) {
printf("\n");
@@ -1246,7 +1246,7 @@ void print_events(const char *event_glob, bool name_only)

print_hwcache_events(event_glob, name_only);

- print_pmu_events(event_glob, name_only);
+ print_pmu_events(event_glob, name_only, quiet);

if (event_glob != NULL)
return;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index df094b4..f3ef0dc 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -100,7 +100,7 @@ void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all);
void parse_events_error(void *data, void *scanner, char const *msg);

-void print_events(const char *event_glob, bool name_only);
+void print_events(const char *event_glob, bool name_only, bool quiet);
void print_events_type(u8 type);
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
bool name_only);
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index b87f520..ccdd714 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -790,7 +790,7 @@ static void wordwrap(char *s, int start, int max, int corr)
}
}

-void print_pmu_events(const char *event_glob, bool name_only)
+void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag)
{
struct perf_pmu *pmu;
struct perf_pmu_alias *alias;
@@ -838,7 +838,7 @@ void print_pmu_events(const char *event_glob, bool name_only)
printf("%s ", aliases[j].name);
continue;
}
- if (aliases[j].desc) {
+ if (aliases[j].desc && !quiet_flag) {
if (numdesc++ == 0 && printed)
printf("\n");
printf(" %-50s [", aliases[j].name);
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index a8ed283..461d13a 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -42,7 +42,7 @@ int perf_pmu__format_parse(char *dir, struct list_head *head);

struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);

-void print_pmu_events(const char *event_glob, bool name_only);
+void print_pmu_events(const char *event_glob, bool name_only, bool quiet);
bool pmu_have_event(const char *pname, const char *name);

int perf_pmu__test(void);
--
1.9.3


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