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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-09-30 23:13:26 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-10-01 00:34:38 +0300 |
| commit | dfc431cbdc3a3c0556f1cd462d724d107cc15a9e (patch) | |
| tree | a3d232e0e2d81a03e0a6c1225d3e2b4d889df996 /tools/perf/util/parse-events.c | |
| parent | 6cca13bdf5a5d561a855259689874e0c7266eec3 (diff) | |
| download | linux-dfc431cbdc3a3c0556f1cd462d724d107cc15a9e.tar.xz | |
perf list: Remove blank lines, headers when piping output
So that one can, for instance, use it with wc -l:
# perf list *:*write* | wc -l
60
Or to look for the "bio" tracepoints, without 'perf list' headers:
# perf list *:*bio* | head
block:block_bio_backmerge [Tracepoint event]
block:block_bio_bounce [Tracepoint event]
block:block_bio_complete [Tracepoint event]
block:block_bio_frontmerge [Tracepoint event]
block:block_bio_queue [Tracepoint event]
block:block_bio_remap [Tracepoint event]
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ts7sc0x8u4io4cifzkup4j44@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/parse-events.c')
| -rw-r--r-- | tools/perf/util/parse-events.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index c1c64fb647aa..5d0cfce2599b 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1534,7 +1534,7 @@ restart: printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[PERF_TYPE_TRACEPOINT]); } - if (evt_num) + if (evt_num && pager_in_use()) printf("\n"); out_free: @@ -1690,7 +1690,7 @@ restart: printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[PERF_TYPE_HW_CACHE]); } - if (evt_num) + if (evt_num && pager_in_use()) printf("\n"); out_free: @@ -1763,7 +1763,7 @@ restart: } printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]); } - if (evt_num) + if (evt_num && pager_in_use()) printf("\n"); out_free: @@ -1804,13 +1804,14 @@ void print_events(const char *event_glob, bool name_only) printf(" %-50s [%s]\n", "cpu/t1=v1[,t2=v2,t3 ...]/modifier", event_type_descriptors[PERF_TYPE_RAW]); - printf(" (see 'man perf-list' on how to encode it)\n"); - printf("\n"); + if (pager_in_use()) + printf(" (see 'man perf-list' on how to encode it)\n\n"); printf(" %-50s [%s]\n", "mem:<addr>[/len][:access]", event_type_descriptors[PERF_TYPE_BREAKPOINT]); - printf("\n"); + if (pager_in_use()) + printf("\n"); } print_tracepoint_events(NULL, NULL, name_only); |