diff options
| author | Andi Kleen <ak@linux.intel.com> | 2020-05-22 05:09:14 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-05-28 16:03:28 +0300 |
| commit | 8c3e05c827ef687215723680862ebd2d431dee49 (patch) | |
| tree | 0335afd20648ba3b393a4813a2d8ac1fa7da80da /tools/perf | |
| parent | e2ce1059b0b3d032aa07cc51c24d28ec498feb5f (diff) | |
| download | linux-8c3e05c827ef687215723680862ebd2d431dee49.tar.xz | |
perf script: Don't force less for non tty output with --xed
--xed currently forces less. When piping the output to other scripts
this can waste a lot of CPU time because less is rather slow.
I've seen it using up a full core on its own in a pipeline.
Only force less when the output is actually a terminal.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20200522020914.527564-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-script.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 4c0837efaceb..2810d5a7096b 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -3301,7 +3301,10 @@ static int parse_xed(const struct option *opt __maybe_unused, const char *str __maybe_unused, int unset __maybe_unused) { - force_pager("xed -F insn: -A -64 | less"); + if (isatty(1)) + force_pager("xed -F insn: -A -64 | less"); + else + force_pager("xed -F insn: -A -64"); return 0; } |