perf record: Tweak "Lowering..." warning in record_opts__config_freq

That is, instead of "Lowering default frequency rate to <F>" say
"Lowering default frequency rate from <f> to <F>", specifying the
overridden default frequency <f>, so you don't have to grep through the
source to "remember" that was e.g. 4000.

Signed-off-by: Hans-Peter Nilsson <hp@axis.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20201228031908.B049B203B5@pchp3.se.axis.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index e70c9dd04567be207d81f3f68835cba17429c8df..1c1f24d9b6d0c84d630f6c56cb3c9566bab03cfc 100644 (file)
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -201,10 +201,10 @@ static int record_opts__config_freq(struct record_opts *opts)
         * Default frequency is over current maximum.
         */
        if (max_rate < opts->freq) {
-               pr_warning("Lowering default frequency rate to %u.\n"
+               pr_warning("Lowering default frequency rate from %u to %u.\n"
                           "Please consider tweaking "
                           "/proc/sys/kernel/perf_event_max_sample_rate.\n",
-                          max_rate);
+                          opts->freq, max_rate);
                opts->freq = max_rate;
        }