Merge tag 'perf-core-for-mingo-4.12-20170503' of git://git.kernel.org/pub/scm/linux...

[karo-tx-linux.git] / tools / perf / util / time-utils.c

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index d1b21c72206d8b1a6a52697adb3091ff09e81ec2..5b5d0214debdcb99c563c84abe4d98746ff6a518 100644 (file)
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -117,3 +117,28 @@ bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
 
        return false;
 }
+
+int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
+{
+       u64  sec = timestamp / NSEC_PER_SEC;
+       u64 usec = (timestamp % NSEC_PER_SEC) / NSEC_PER_USEC;
+
+       return scnprintf(buf, sz, "%"PRIu64".%06"PRIu64, sec, usec);
+}
+
+int fetch_current_timestamp(char *buf, size_t sz)
+{
+       struct timeval tv;
+       struct tm tm;
+       char dt[32];
+
+       if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
+               return -1;
+
+       if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
+               return -1;
+
+       scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);
+
+       return 0;
+}