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 kmem stat Failed to open /usr/lib/libpthread-2.21.so, continuing without symbols Failed to open /usr/lib/libc-2.21.so, continuing without symbols Failed to open /lib/modules/3.18.6-1-ARCH/kernel/fs/ext4/ext4.ko.gz, continuing without symbols SUMMARY (SLAB allocator) ======================== Total bytes requested: 172,628 Total bytes allocated: 173,088 Total bytes freed: 161,280 Net total bytes allocated: 11,808 Total bytes wasted on internal fragmentation: 460 Internal fragmentation: 0.265761% Cross CPU allocations: 0/851 After: # perf kmem stat -q SUMMARY (SLAB allocator) ======================== Total bytes requested: 172,628 Total bytes allocated: 173,088 Total bytes freed: 161,280 Net total bytes allocated: 11,808 Total bytes wasted on internal fragmentation: 460 Internal fragmentation: 0.265761% Cross CPU allocations: 0/851 Suggested-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Namhyung Kim <[email protected]> --- tools/perf/Documentation/perf-kmem.txt | 4 ++++ tools/perf/builtin-kmem.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/tools/perf/Documentation/perf-kmem.txt b/tools/perf/Documentation/perf-kmem.txt index 479fc3261a50..0731389501d4 100644 --- a/tools/perf/Documentation/perf-kmem.txt +++ b/tools/perf/Documentation/perf-kmem.txt @@ -29,6 +29,10 @@ OPTIONS --verbose:: Be more verbose. (show symbol address, etc) +-q:: +--quiet:: + Do not show any message. + --caller:: Show per-callsite statistics diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index 6da8d083e4e5..7148137c3a3d 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -1895,6 +1895,7 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) OPT_STRING('i', "input", &input_name, "file", "input file name"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), + OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"), OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL, "show per-callsite statistics", parse_caller_opt), OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL, @@ -1932,6 +1933,9 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) if (!argc) usage_with_options(kmem_usage, kmem_options); + if (quiet) + perf_quiet_option(); + if (kmem_slab == 0 && kmem_page == 0) { if (kmem_default == KMEM_SLAB) kmem_slab = 1; -- 2.11.0
