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Subject[PATCH v21 08/19] perf, tools: Add a --no-desc flag to perf list
Date
From: Andi Kleen <ak@linux.intel.com>

Add a --no-desc 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.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
---

v2: Rename --quiet to --no-desc. Add option to man page.

v18: Fix minor conflict in tools/perf/builtin-list.c; Add !desc_flag
to the newly introduced print_pmu_events() call site.

v21: Fix minor conflicts in tools/perf/builtin-list.c
---
tools/perf/Documentation/perf-list.txt | 8 +++++++-
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 +-
6 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index a126e97..72209bc 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -8,13 +8,19 @@ perf-list - List all symbolic event types
SYNOPSIS
--------
[verse]
-'perf list' [hw|sw|cache|tracepoint|pmu|event_glob]
+'perf list' [--no-desc] [hw|sw|cache|tracepoint|pmu|event_glob]

DESCRIPTION
-----------
This command displays the symbolic event types which can be selected in the
various perf commands with the -e option.

+OPTIONS
+-------
+--no-desc::
+Don't print descriptions.
+
+
[[EVENT_MODIFIERS]]
EVENT MODIFIERS
---------------
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 88ee419..b14cb16 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -16,16 +16,20 @@
#include "util/pmu.h"
#include <subcmd/parse-options.h>

+static bool desc_flag = true;
+
int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
{
int i;
bool raw_dump = false;
struct option list_options[] = {
OPT_BOOLEAN(0, "raw-dump", &raw_dump, "Dump raw events"),
+ OPT_BOOLEAN('d', "desc", &desc_flag,
+ "Print extra event descriptions. --no-desc to not print."),
OPT_END()
};
const char * const list_usage[] = {
- "perf list [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
+ "perf list [--no-desc] [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
NULL
};

@@ -40,7 +44,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
printf("\nList of pre-defined events (to be used in -e):\n\n");

if (argc == 0) {
- print_events(NULL, raw_dump);
+ print_events(NULL, raw_dump, !desc_flag);
return 0;
}

@@ -61,14 +65,14 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
strcmp(argv[i], "hwcache") == 0)
print_hwcache_events(NULL, raw_dump);
else if (strcmp(argv[i], "pmu") == 0)
- print_pmu_events(NULL, raw_dump);
+ print_pmu_events(NULL, raw_dump, !desc_flag);
else if (strcmp(argv[i], "sdt") == 0)
print_sdt_events(NULL, NULL, raw_dump);
else if ((sep = strchr(argv[i], ':')) != NULL) {
int sep_idx;

if (sep == NULL) {
- print_events(argv[i], raw_dump);
+ print_events(argv[i], raw_dump, !desc_flag);
continue;
}
sep_idx = sep - argv[i];
@@ -90,7 +94,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
print_symbol_events(s, PERF_TYPE_SOFTWARE,
event_symbols_sw, PERF_COUNT_SW_MAX, raw_dump);
print_hwcache_events(s, raw_dump);
- print_pmu_events(s, raw_dump);
+ print_pmu_events(s, raw_dump, !desc_flag);
print_tracepoint_events(NULL, s, raw_dump);
print_sdt_events(NULL, s, raw_dump);
free(s);
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 6c913c3..a3c7739 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2229,7 +2229,7 @@ out_enomem:
/*
* 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_flag)
{
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
@@ -2239,7 +2239,7 @@ 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_flag);

if (event_glob != NULL)
return;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index d1edbf8..795f2579 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -171,7 +171,7 @@ void parse_events_update_lists(struct list_head *list_event,
void parse_events_evlist_error(struct parse_events_evlist *data,
int idx, const char *str);

-void print_events(const char *event_glob, bool name_only);
+void print_events(const char *event_glob, bool name_only, bool quiet);

struct event_symbol {
const char *symbol;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index ef9de3e..cb4c215 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1085,7 +1085,7 @@ 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;
@@ -1152,7 +1152,7 @@ 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)
printf("\n");
printf(" %-50s\n", aliases[j].name);
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 11bda57..42999c7 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -70,7 +70,7 @@ 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__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
--
1.8.3.1
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