The system_time() function used the wrong element of the splits array.
Also add a comment about the units for time measurements.
libstdc++-v3/ChangeLog:
* testsuite/util/testsuite_performance.h (time_counter): Add
comment about times.
(time_counter::system_time): Use correct split value.
---
Tested x86_64-linux. Pushed to trunk.
libstdc++-v3/testsuite/util/testsuite_performance.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/testsuite/util/testsuite_performance.h
b/libstdc++-v3/testsuite/util/testsuite_performance.h
index 4fd95b7e22a..c2be9c8e878 100644
--- a/libstdc++-v3/testsuite/util/testsuite_performance.h
+++ b/libstdc++-v3/testsuite/util/testsuite_performance.h
@@ -73,6 +73,9 @@ namespace __gnu_test
class time_counter
{
private:
+ // All times are measured in clock ticks.
+ // There are CLOCKS_PER_SEC ticks per second.
+ // POSIX requires CLOCKS_PER_SEC == 1000000 so ticks == microseconds.
clock_t elapsed_begin;
clock_t elapsed_end;
tms tms_begin;
@@ -136,7 +139,7 @@ namespace __gnu_test
std::size_t
system_time() const
- { return (tms_end.tms_stime - tms_begin.tms_stime) + splits[1]; }
+ { return (tms_end.tms_stime - tms_begin.tms_stime) + splits[2]; }
};
class resource_counter
--
2.47.0
