2017-06-13 10:57:11

by Miroslav Lichvar

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

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 <[email protected]>
Cc: Prarit Bhargava <[email protected]>
Cc: Richard Cochran <[email protected]>
Signed-off-by: Miroslav Lichvar <[email protected]>
---
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


2017-06-13 22:54:36

by John Stultz

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

On Tue, Jun 13, 2017 at 3:57 AM, Miroslav Lichvar <[email protected]> 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 <[email protected]>
> Cc: Prarit Bhargava <[email protected]>
> Cc: Richard Cochran <[email protected]>
> Signed-off-by: Miroslav Lichvar <[email protected]>

Queued up in my tree for testing, targeting 4.13.

thanks
-john