perf time-utils: Add utility function to print time stamps in nanoseconds

[linux-2.6-microblaze.git] / tools / perf / util / time-utils.c

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 0f53bae..20663a4 100644 (file)
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -453,6 +453,14 @@ int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
        return scnprintf(buf, sz, "%"PRIu64".%06"PRIu64, sec, usec);
 }
 
+int timestamp__scnprintf_nsec(u64 timestamp, char *buf, size_t sz)
+{
+       u64 sec  = timestamp / NSEC_PER_SEC,
+           nsec = timestamp % NSEC_PER_SEC;
+
+       return scnprintf(buf, sz, "%" PRIu64 ".%09" PRIu64, sec, nsec);
+}
+
 int fetch_current_timestamp(char *buf, size_t sz)
 {
        struct timeval tv;