The -q/--quiet option is to suppress any message. Sometimes users just want to run the command and it can be used for that case.
Before: $ perf evlist -i perf.data.kmem kmem:kmalloc kmem:kmalloc_node kmem:kfree kmem:kmem_cache_alloc kmem:kmem_cache_alloc_node kmem:kmem_cache_free kmem:mm_page_alloc kmem:mm_page_free # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events After: $ perf evlist -i perf.data.kmem -q kmem:kmalloc kmem:kmalloc_node kmem:kfree kmem:kmem_cache_alloc kmem:kmem_cache_alloc_node kmem:kmem_cache_free kmem:mm_page_alloc kmem:mm_page_free Suggested-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Namhyung Kim <[email protected]> --- tools/perf/Documentation/perf-evlist.txt | 4 ++++ tools/perf/builtin-evlist.c | 8 +++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-evlist.txt b/tools/perf/Documentation/perf-evlist.txt index 6f7200fb85cf..033aac0d4d79 100644 --- a/tools/perf/Documentation/perf-evlist.txt +++ b/tools/perf/Documentation/perf-evlist.txt @@ -28,6 +28,10 @@ OPTIONS --verbose=:: Show all fields. +-q:: +--quiet:: + Do not show any message. + -g:: --group:: Show event group information. diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c index e09c4287fe87..37c2cf7d395f 100644 --- a/tools/perf/builtin-evlist.c +++ b/tools/perf/builtin-evlist.c @@ -39,7 +39,7 @@ static int __cmd_evlist(const char *file_name, struct perf_attr_details *details has_tracepoint = true; } - if (has_tracepoint && !details->trace_fields) + if (has_tracepoint && !details->trace_fields && !quiet) printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n"); perf_session__delete(session); @@ -54,6 +54,7 @@ int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused) OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"), OPT_BOOLEAN('v', "verbose", &details.verbose, "Show all event attr details"), + OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"), OPT_BOOLEAN('g', "group", &details.event_group, "Show event group information"), OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"), @@ -69,6 +70,11 @@ int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused) if (argc) usage_with_options(evlist_usage, options); + if (quiet) { + perf_quiet_option(); + details.verbose = false; + } + if (details.event_group && (details.verbose || details.freq)) { usage_with_options_msg(evlist_usage, options, "--group option is not compatible with other options\n"); -- 2.11.0
