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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: Andi 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2019-03-05 06:47:53 -08:00 committed by Arnaldo Carvalho de Melo
parent 52bab88682
commit f8c856cb2c
2 changed files with 9 additions and 0 deletions
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8
tools/perf/util/time-utils.c
View File

@ -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;

1
tools/perf/util/time-utils.h
View File

@ -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);