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| author | Andi Kleen <ak@linux.intel.com> | 2017-05-22 18:00:16 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-06-02 11:15:34 -0300 |
| commit | 918c7b062a0f9198d9503cfece0210c1743c0f88 (patch) | |
| tree | 40cd434b7e5ecc2106011d83cc3911a41e831701 | |
| parent | b13bbeee5ee606cfb57ddcf47e66802f9aa7273e (diff) | |
| download | linux-918c7b062a0f9198d9503cfece0210c1743c0f88.tar.gz linux-918c7b062a0f9198d9503cfece0210c1743c0f88.tar.bz2 linux-918c7b062a0f9198d9503cfece0210c1743c0f88.zip | |
perf stat: Only print NMI watchdog hint when enabled
Only print the NMI watchdog hint when that watchdog it actually enabled.
This avoids printing these unnecessarily.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/n/tip-lnw7edxnqsphkmeew857wz1i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/builtin-stat.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index a935b5023732..ad9324d1daf9 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1578,6 +1578,7 @@ static void print_header(int argc, const char **argv) static void print_footer(void) { FILE *output = stat_config.output; + int n; if (!null_run) fprintf(output, "\n"); @@ -1590,7 +1591,9 @@ static void print_footer(void) } fprintf(output, "\n\n"); - if (print_free_counters_hint) + if (print_free_counters_hint && + sysctl__read_int("kernel/nmi_watchdog", &n) >= 0 && + n > 0) fprintf(output, "Some events weren't counted. Try disabling the NMI watchdog:\n" " echo 0 > /proc/sys/kernel/nmi_watchdog\n" |