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.
Suggested-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Namhyung Kim <[email protected]> --- tools/perf/Documentation/perf-kvm.txt | 3 +++ tools/perf/builtin-kvm.c | 10 +++++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt index 6a5bb2b17039..8eec9d13181c 100644 --- a/tools/perf/Documentation/perf-kvm.txt +++ b/tools/perf/Documentation/perf-kvm.txt @@ -96,6 +96,9 @@ OPTIONS -v:: --verbose:: Be more verbose (show counter open errors, etc). +-q:: +--quiet:: + Do not show any message. STAT REPORT OPTIONS ------------------- diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 08fa88f62a24..1d121bb0a14d 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1018,7 +1018,7 @@ static int kvm_live_open_events(struct perf_kvm_stat *kvm) err = perf_evlist__open(evlist); if (err < 0) { - printf("Couldn't create the events: %s\n", + pr_err("Couldn't create the events: %s\n", str_error_r(errno, sbuf, sizeof(sbuf))); goto out; } @@ -1313,6 +1313,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm, perf_evlist__parse_mmap_pages), OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"), + OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"), OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, "system-wide collection from all CPUs"), OPT_UINTEGER('d', "display", &kvm->display_time, @@ -1372,6 +1373,9 @@ static int kvm_events_live(struct perf_kvm_stat *kvm, usage_with_options(live_usage, live_options); } + if (quiet) + perf_quiet_option(); + kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ /* @@ -1557,6 +1561,7 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) "file", "file saving guest os /proc/modules"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"), + OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"), OPT_END() }; @@ -1572,6 +1577,9 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) if (!argc) usage_with_options(kvm_usage, kvm_options); + if (quiet) + perf_quiet_option(); + if (!perf_host) perf_guest = 1; -- 2.11.0
