perf record: Add clockid parameter

[karo-tx-linux.git] / tools / perf / builtin-record.c

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 18aad239b401b1d0654bf38db51a4aa45e768f0b..ac610488d2e1e618271e3ec3384385291474c08a 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -711,6 +711,90 @@ static int perf_record_config(const char *var, const char *value, void *cb)
        return perf_default_config(var, value, cb);
 }
 
+struct clockid_map {
+       const char *name;
+       int clockid;
+};
+
+#define CLOCKID_MAP(n, c)      \
+       { .name = n, .clockid = (c), }
+
+#define CLOCKID_END    { .name = NULL, }
+
+
+/*
+ * Add the missing ones, we need to build on many distros...
+ */
+#ifndef CLOCK_MONOTONIC_RAW
+#define CLOCK_MONOTONIC_RAW 4
+#endif
+#ifndef CLOCK_BOOTTIME
+#define CLOCK_BOOTTIME 7
+#endif
+#ifndef CLOCK_TAI
+#define CLOCK_TAI 11
+#endif
+
+static const struct clockid_map clockids[] = {
+       /* available for all events, NMI safe */
+       CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
+       CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
+
+       /* available for some events */
+       CLOCKID_MAP("realtime", CLOCK_REALTIME),
+       CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
+       CLOCKID_MAP("tai", CLOCK_TAI),
+
+       /* available for the lazy */
+       CLOCKID_MAP("mono", CLOCK_MONOTONIC),
+       CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
+       CLOCKID_MAP("real", CLOCK_REALTIME),
+       CLOCKID_MAP("boot", CLOCK_BOOTTIME),
+
+       CLOCKID_END,
+};
+
+static int parse_clockid(const struct option *opt, const char *str, int unset)
+{
+       struct record_opts *opts = (struct record_opts *)opt->value;
+       const struct clockid_map *cm;
+       const char *ostr = str;
+
+       if (unset) {
+               opts->use_clockid = 0;
+               return 0;
+       }
+
+       /* no arg passed */
+       if (!str)
+               return 0;
+
+       /* no setting it twice */
+       if (opts->use_clockid)
+               return -1;
+
+       opts->use_clockid = true;
+
+       /* if its a number, we're done */
+       if (sscanf(str, "%d", &opts->clockid) == 1)
+               return 0;
+
+       /* allow a "CLOCK_" prefix to the name */
+       if (!strncasecmp(str, "CLOCK_", 6))
+               str += 6;
+
+       for (cm = clockids; cm->name; cm++) {
+               if (!strcasecmp(str, cm->name)) {
+                       opts->clockid = cm->clockid;
+                       return 0;
+               }
+       }
+
+       opts->use_clockid = false;
+       ui__warning("unknown clockid %s, check man page\n", ostr);
+       return -1;
+}
+
 static const char * const __record_usage[] = {
        "perf record [<options>] [<command>]",
        "perf record [<options>] -- <command> [<options>]",
@@ -842,6 +926,9 @@ struct option __record_options[] = {
                    "Sample machine registers on interrupt"),
        OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
                    "Record running/enabled time of read (:S) events"),
+       OPT_CALLBACK('k', "clockid", &record.opts,
+       "clockid", "clockid to use for events, see clock_gettime()",
+       parse_clockid),
        OPT_END()
 };