[PATCH] kselftests: timers: Fix inconsistency-check to not ignore first timestamp

[PATCH] kselftests: timers: Fix inconsistency-check to not ignore first timestamp

[Miroslav Lichvar]

When the first timestamp in the list of clock readings was later than
the second timestamp and all other timestamps were in order, the
inconsistency was not reported because the index of the out-of-order
timestamp was equal to the default value.

Cc: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
---
 tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
index caf1bc9..74c60e8 100644
--- a/tools/testing/selftests/timers/inconsistency-check.c
+++ b/tools/testing/selftests/timers/inconsistency-check.c
@@ -118,7 +118,7 @@ int consistency_test(int clock_type, unsigned long seconds)
 	start_str = ctime(&t);
 
 	while (seconds == -1 || now - then < seconds) {
-		inconsistent = 0;
+		inconsistent = -1;
 
 		/* Fill list */
 		for (i = 0; i < CALLS_PER_LOOP; i++)
@@ -130,7 +130,7 @@ int consistency_test(int clock_type, unsigned long seconds)
 				inconsistent = i;
 
 		/* display inconsistency */
-		if (inconsistent) {
+		if (inconsistent >= 0) {
 			unsigned long long delta;
 
 			printf("\%s\n", start_str);
-- 
2.9.3

Re: [PATCH] kselftests: timers: Fix inconsistency-check to not ignore first timestamp

[John Stultz]

On Tue, Jun 13, 2017 at 3:57 AM, Miroslav Lichvar <mlichvar@redhat.com> wrote:
> When the first timestamp in the list of clock readings was later than
> the second timestamp and all other timestamps were in order, the
> inconsistency was not reported because the index of the out-of-order
> timestamp was equal to the default value.
>
> Cc: John Stultz <john.stultz@linaro.org>
> Cc: Prarit Bhargava <prarit@redhat.com>
> Cc: Richard Cochran <richardcochran@gmail.com>
> Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>

Queued up in my tree for testing, targeting 4.13.

thanks
-john