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selftests: timers: nsleep-lat: Explicitly list the tested clocks

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The test relies on the numeric values of the clockids.
As not all clocks are meant to be tested, this requires skipping some
clocks unconditionally, cluttering the result.

Use an equivalent, explicit list instead.

In addition to CLOCK_PROCESS_CPUTIME_ID, CLOCK_THREAD_CPUTIME_ID and
CLOCK_HWSPECIFIC which were unconditionally skipped before, this also
unconditionally skips CLOCK_MONOTONIC_RAW, CLOCK_MONOTONIC_COARSE and
CLOCK_REALTIME_COARSE. clock_nanosleep() is not supported for those.

Signed-off-by: Thomas Weißschuh (Schneider Electric) <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Acked-by: John Stultz <jstultz@google.com>
Link: https://patch.msgid.link/20260803-auxclock-nanosleep-prep-v2-15-910cbd485390@linutronix.de
This commit is contained in:
Thomas Weißschuh (Schneider Electric)
2026-08-03 12:04:46 +02:00
committed by Thomas Gleixner
parent a00f90877d
commit 187ac443ed
1 changed files with 12 additions and 14 deletions
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26
tools/testing/selftests/timers/nsleep-lat.c
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@@ -29,9 +29,6 @@
#define UNRESONABLE_LATENCY (40 * NSEC_PER_MSEC)
/* CLOCK_HWSPECIFIC == CLOCK_SGI_CYCLE (Deprecated) */
#define CLOCK_HWSPECIFIC 10
#define UNSUPPORTED 0xf00f
struct timespec timespec_add(struct timespec ts, unsigned long long ns)
@@ -97,24 +94,25 @@ int nanosleep_lat_test(int clockid, long long ns)
return 0;
}
#define SKIPPED_CLOCK_COUNT 3
int main(int argc, char **argv)
{
long long length;
int clockid, ret;
int max_clocks = CLOCK_TAI + 1;
static const clockid_t tested_clocks[] = {
CLOCK_REALTIME,
CLOCK_MONOTONIC,
CLOCK_BOOTTIME,
CLOCK_BOOTTIME_ALARM,
CLOCK_REALTIME_ALARM,
CLOCK_TAI,
};
ksft_print_header();
ksft_set_plan(max_clocks - CLOCK_REALTIME - SKIPPED_CLOCK_COUNT);
ksft_set_plan(ARRAY_SIZE(tested_clocks));
for (clockid = CLOCK_REALTIME; clockid < max_clocks; clockid++) {
/* Skip cputime clockids since nanosleep won't increment cputime */
if (clockid == CLOCK_PROCESS_CPUTIME_ID ||
clockid == CLOCK_THREAD_CPUTIME_ID ||
clockid == CLOCK_HWSPECIFIC)
continue;
for (size_t clock_index = 0; clock_index < ARRAY_SIZE(tested_clocks); clock_index++) {
clockid = tested_clocks[clock_index];
length = 10;
while (length <= (NSEC_PER_SEC * 10)) {