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[PATCH 2/2] Determine the iteration count based on wallclock instead of user+system time.
- From: Wei-cheng Wang <cole945 at gmail dot com>
- To: uweigand at de dot ibm dot com, gdb-patches at sourceware dot org, cole945 at gmail dot com
- Date: Fri, 21 Aug 2015 01:32:18 +0800
- Subject: [PATCH 2/2] Determine the iteration count based on wallclock instead of user+system time.
- Authentication-results: sourceware.org; auth=none
- References: <1440091938-42453-1-git-send-email-cole945 at gmail dot com>
Hi Ulrich,
This patch will combine with "Tracepoint for ppc64" into one patch.
Is this ok?
Thanks,
Wei-cheng
---
gdb/testsuite/ChangeLog
2015-08-23 Wei-cheng Wang <cole945@gmail.com>
* gdb.trace/tspeed.c (myclock): Return wallclock instead of
user+system time.
(trace_speed_test): Determine the iteration count for a time
between 15..30 seconds.
---
gdb/testsuite/gdb.trace/tspeed.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/gdb/testsuite/gdb.trace/tspeed.c b/gdb/testsuite/gdb.trace/tspeed.c
index ca4c7bf..c9e212c 100644
--- a/gdb/testsuite/gdb.trace/tspeed.c
+++ b/gdb/testsuite/gdb.trace/tspeed.c
@@ -56,13 +56,9 @@ int nspertp = 0;
unsigned long long
myclock ()
{
- struct timeval tm, tm2;
- struct rusage ru;
- getrusage (RUSAGE_SELF, &ru);
- tm = ru.ru_utime;
- tm2 = ru.ru_stime;
- return (((unsigned long long) tm.tv_sec) * 1000000) + tm.tv_usec
- + (((unsigned long long) tm2.tv_sec) * 1000000) + tm2.tv_usec;
+ struct timeval tm;
+ gettimeofday (&tm, NULL);
+ return (((unsigned long long) tm.tv_sec) * 1000000) + tm.tv_usec;
}
int
@@ -162,9 +158,9 @@ trace_speed_test (void)
return -1;
if (idelta > mindelta
- /* Total test time should be between 2 and 5 seconds. */
- && (total1 + total2) > (2 * 1000000)
- && (total1 + total2) < (5 * 1000000))
+ /* Total test time should be between 15 and 30 seconds. */
+ && (total1 + total2) > (15 * 1000000)
+ && (total1 + total2) < (30 * 1000000))
{
nsdelta = (((unsigned long long) idelta) * 1000) / iters;
printf ("Second loop took %d ns longer per iter than first\n", nsdelta);
--
1.9.1