perf list: Add a --no-desc flag

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: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1473978296-20712-9-git-send-email-sukadev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 88ee419e5189..b14cb162f841 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);