[tip:perf/core] perf list: Place the header text in its right position

tip-bot for Yunlong Song
2015-02-18T18:42:37Z

Commit-ID: 619a303c1b8bd22abc549477d038ef9b5c1fe1bd
Gitweb: http://git.kernel.org/tip/619a303c1b8bd22abc549477d038ef9b5c1fe1bd
Author: Yunlong Song <yunlong.song@huawei.com>
AuthorDate: Fri, 13 Feb 2015 21:11:55 +0800
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 13 Feb 2015 11:57:50 -0300

perf list: Place the header text in its right position

The hearer text 'List of pre-defined events (to be used in -e):' is
placed in an improper function, which causes an abnormal output, e.g.
'perf list hw' shows no guiding text at all, and 'perf list hw
L1-dcache*' shows the guiding text incorrectly in the middle of the
output.

Example
Before this patch:

$ perf list hw L1-dcache*

branch-instructions OR branches [Hardware event]
branch-misses [Hardware event]
bus-cycles [Hardware event]
cache-misses [Hardware event]
cache-references [Hardware event]
cpu-cycles OR cycles [Hardware event]
instructions [Hardware event]
stalled-cycles-backend OR idle-cycles-backend [Hardware event]
stalled-cycles-frontend OR idle-cycles-frontend [Hardware event]

List of pre-defined events (to be used in -e): <-- incorrect position
L1-dcache-load-misses [Hardware cache event]
L1-dcache-loads [Hardware cache event]
L1-dcache-prefetch-misses [Hardware cache event]
L1-dcache-prefetches [Hardware cache event]
L1-dcache-store-misses [Hardware cache event]
L1-dcache-stores [Hardware cache event]

After this patch:

$ perf list hw L1-dcache*

List of pre-defined events (to be used in -e): <-- correct position

branch-instructions OR branches [Hardware event]
branch-misses [Hardware event]
bus-cycles [Hardware event]
cache-misses [Hardware event]
cache-references [Hardware event]
cpu-cycles OR cycles [Hardware event]
instructions [Hardware event]
stalled-cycles-backend OR idle-cycles-backend [Hardware event]
stalled-cycles-frontend OR idle-cycles-frontend [Hardware event]

L1-dcache-load-misses [Hardware cache event]
L1-dcache-loads [Hardware cache event]
L1-dcache-prefetch-misses [Hardware cache event]
L1-dcache-prefetches [Hardware cache event]
L1-dcache-store-misses [Hardware cache event]
L1-dcache-stores [Hardware cache event]

Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1423833115-11199-8-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-list.c | 3 +++
tools/perf/util/parse-events.c | 5 -----
2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 198f3c3..ad8018e 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -41,6 +41,9 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
return 0;
}

+ if (!raw_dump)
+ printf("\nList of pre-defined events (to be used in -e):\n\n");
+
if (argc == 0) {
print_events(NULL, false);
return 0;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ecf069b..109ba5c 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1319,11 +1319,6 @@ static void print_symbol_events(const char *event_glob, unsigned type,
*/
void print_events(const char *event_glob, bool name_only)
{
- if (!name_only) {
- printf("\n");
- printf("List of pre-defined events (to be used in -e):\n");
- }
-
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);