perf record: Fix to honor user freq/interval properly

When configuring event perf checked a wrong condition that user
specified both of freq (-F) and period (-c) or the event has no
default value.  This worked because most of events don't have default
value and only tracepoint events have default of 1 (and it's not
desirable to change it for those events).

However, Andi's downloadable event patch changes the situation so it
cannot change the value for those events.  Fix it by allowing override
the default value if user gives one of the options.

  $ perf record -a -e uops_retired.all -F 4000 sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.325 MB perf.data (~14185 samples) ]

  $ perf evlist -F
  cpu/uops_retired.all/: sample_freq=4000

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1402292617-26278-1-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 21154dabc5fa7d72b3801f1b0244dc790842bcb2..8606175fe1e80b1c25e788f4b583e16bbd3e7e2f 100644 (file)
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -589,10 +589,10 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
        }
 
        /*
-        * We default some events to a 1 default interval. But keep
+        * We default some events to have a default interval. But keep
         * it a weak assumption overridable by the user.
         */
-       if (!attr->sample_period || (opts->user_freq != UINT_MAX &&
+       if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
                                     opts->user_interval != ULLONG_MAX)) {
                if (opts->freq) {
                        perf_evsel__set_sample_bit(evsel, PERIOD);