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Commit f8c856cb authored by Andi Kleen's avatar Andi Kleen Committed by Arnaldo Carvalho de Melo
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perf time-utils: Add utility function to print time stamps in nanoseconds 



Add a utility function to print nanosecond timestamps.

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20190305144758.12397-11-andi@firstfloor.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 52bab886

tools/perf/util/time-utils.c

+8 −0
Original line number Diff line number Diff line
@@ -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;

tools/perf/util/time-utils.h

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ int perf_time__parse_for_ranges(const char *str, struct perf_session *session, 
				int *range_size, int *range_num);



int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz);

int timestamp__scnprintf_nsec(u64 timestamp, char *buf, size_t sz);



int fetch_current_timestamp(char *buf, size_t sz);