* [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs
@ 2026-07-31 7:15 Wake Liu via ltp
2026-07-31 7:59 ` Andrea Cervesato via ltp
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Wake Liu via ltp @ 2026-07-31 7:15 UTC (permalink / raw)
To: ltp; +Cc: Wake Liu
Debugging/instrumentation kernel configs (like KASAN, LOCKDEP, etc.)
can significantly degrade performance, causing the time namespace
offset checks to exceed the default 10ms tolerance.
Use tst_has_slow_kconfig() to detect these slow configurations and
multiply the delta tolerance by 10, preventing false test failures
on slow/debug kernels.
Signed-off-by: Wake Liu <wakel@google.com>
---
testcases/kernel/syscalls/clock_gettime/clock_gettime03.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/testcases/kernel/syscalls/clock_gettime/clock_gettime03.c b/testcases/kernel/syscalls/clock_gettime/clock_gettime03.c
index 495030c07e..665a1107b8 100644
--- a/testcases/kernel/syscalls/clock_gettime/clock_gettime03.c
+++ b/testcases/kernel/syscalls/clock_gettime/clock_gettime03.c
@@ -16,6 +16,7 @@
#include "time64_variants.h"
#include "tst_safe_clocks.h"
#include "tst_timer.h"
+#include "tst_kconfig.h"
#include "lapi/sched.h"
static struct tcase {
@@ -117,6 +118,11 @@ static void setup(void)
delta *= 10;
}
+ if (tst_has_slow_kconfig()) {
+ tst_res(TINFO, "Slow kernel config detected, multiply the delta by 10.");
+ delta *= 10;
+ }
+
now.type = then.type = parent_then.type = tv->ts_type;
tst_res(TINFO, "Testing variant: %s", variants[tst_variant].desc);
parent_ns = SAFE_OPEN("/proc/self/ns/time_for_children", O_RDONLY);
--
2.55.0.508.g3f0d502094-goog
--
Mailing list info: https://lists.linux.it/listinfo/ltp
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs
2026-07-31 7:15 [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs Wake Liu via ltp
@ 2026-07-31 7:59 ` Andrea Cervesato via ltp
2026-07-31 9:45 ` [LTP] " linuxtestproject.agent
2026-07-31 10:21 ` [LTP] [PATCH] " Andrea Cervesato via ltp
2 siblings, 0 replies; 4+ messages in thread
From: Andrea Cervesato via ltp @ 2026-07-31 7:59 UTC (permalink / raw)
To: Wake Liu via ltp; +Cc: Wake Liu, ltp
Reviewed-by: Andrea Cervesato <andrea.cervesato@suse.com>
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com
--
Mailing list info: https://lists.linux.it/listinfo/ltp
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [LTP] clock_gettime03: Extend tolerance on slow kernel configs
2026-07-31 7:15 [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs Wake Liu via ltp
2026-07-31 7:59 ` Andrea Cervesato via ltp
@ 2026-07-31 9:45 ` linuxtestproject.agent
2026-07-31 10:21 ` [LTP] [PATCH] " Andrea Cervesato via ltp
2 siblings, 0 replies; 4+ messages in thread
From: linuxtestproject.agent @ 2026-07-31 9:45 UTC (permalink / raw)
To: Wake Liu; +Cc: ltp
Hi Wake,
On Fri, 31 Jul 2026, Wake Liu wrote:
> clock_gettime03: Extend tolerance on slow kernel configs
Verdict - Reviewed
---
Note:
The agent can sometimes produce false positives although often its
findings are genuine. If you find issues with the review, please
comment this email or ignore the suggestions.
Regards,
LTP AI Reviewer
--
Mailing list info: https://lists.linux.it/listinfo/ltp
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs
2026-07-31 7:15 [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs Wake Liu via ltp
2026-07-31 7:59 ` Andrea Cervesato via ltp
2026-07-31 9:45 ` [LTP] " linuxtestproject.agent
@ 2026-07-31 10:21 ` Andrea Cervesato via ltp
2 siblings, 0 replies; 4+ messages in thread
From: Andrea Cervesato via ltp @ 2026-07-31 10:21 UTC (permalink / raw)
To: Wake Liu via ltp; +Cc: Wake Liu, ltp
Merged, Thanks!
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com
--
Mailing list info: https://lists.linux.it/listinfo/ltp
^ permalink raw reply [flat|nested] 4+ messages in thread
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2026-07-31 7:15 [LTP] [PATCH] clock_gettime03: Extend tolerance on slow kernel configs Wake Liu via ltp
2026-07-31 7:59 ` Andrea Cervesato via ltp
2026-07-31 9:45 ` [LTP] " linuxtestproject.agent
2026-07-31 10:21 ` [LTP] [PATCH] " Andrea Cervesato via ltp
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