In slow or emulated environments, the hardcoded 1-second watchdog timeout in kill_timeout() can easily expire before threads finish scheduling and processing events, causing spurious test failures.
Add support for KSFT_MACHINE_SLOW, which is already used in kselftest, to increase the timeout multiplier to 10x (10 seconds). Furthermore, allow KSFT_TIMEOUT_MUL to explicitly override the multiplier. Signed-off-by: Florian Schmaus <[email protected]> --- .../filesystems/epoll/epoll_wakeup_test.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c index 81a994943e12..8d5b15a09439 100644 --- a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c +++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c @@ -40,9 +40,29 @@ static void signal_handler(int signum) { } +static unsigned int get_timeout_multiplier(void) +{ + const char *mul_str = getenv("KSFT_TIMEOUT_MUL"); + const char *slow_str = getenv("KSFT_MACHINE_SLOW"); + unsigned int mul = 1; + + if (slow_str) + mul = 10; + + if (mul_str) { + int val; + + val = atoi(mul_str); + if (val > 0) + mul = (unsigned int)val; + } + + return mul; +} + static void kill_timeout(struct epoll_mtcontext *ctx) { - usleep(1000000); + usleep(1000000 * get_timeout_multiplier()); pthread_kill(ctx->main, SIGUSR1); pthread_kill(ctx->waiter, SIGUSR1); } --- base-commit: 1b78070aaef63512688aebfbc82365ef9d6660f1 change-id: 20260828-selftest-epoll-timeout-0d47c17beaa2 Best regards, -- Florian Schmaus <[email protected]>
