From nobody Fri Dec 19 20:10:25 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C99DF17BDA for ; Wed, 10 Apr 2024 22:46:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712789186; cv=none; b=uE467w1vz50t0Y87zdEqakc78vRe6iAz5wFZqNW9QS0sKctxMXwoniGWmwnhQI2f5WCWvDZU+dW7XBRnhkARHUDVhottVWFPLcr2Xr8epNVaMPvajSMrcOf/R+gx9+MCkwiYF2x+N26g0tnHSYql5U+NEeO3tdAhv8Uv9zKJ8/w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712789186; c=relaxed/simple; bh=Jz7RJXZF/wpnmhSKslp2B8lopo6bOLwGJ9GuQe5xSbw=; h=Message-ID:From:To:Cc:Subject:References:MIME-Version: Content-Type:Date; b=Y8Hx7Z5jmrOzP91AOhFHlxNvog3t4DjkJXee7Uh+g80ssdYbW1ymfq3GDCj+J/IEoShrN9VqY5BjCqbwRNKmBpT4BzVCvUAYc7K0UZE9VUZgzuxvhtuV8PMKH+/EI0a5y5rFsOuL0R6ILcYMhX1esqBJ/+vuxCQU5gxRg0DPCQg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=w07gFicp; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=W+hc683y; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="w07gFicp"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="W+hc683y" Message-ID: <20240410165551.314429637@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1712789183; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=oS7SrzV2Wd9Ag3yMmGtoq7FlROh6d1Si5LvLo/AXQAY=; b=w07gFicpR/1qi8Djk6/+jTf0DdJb59vWhGl7olnPMcNLuwbA00kMjxEv5SEHStFf6NgS9K s8Di41Uu+5f/e2ehWvMDsaMKWUKOF2Zn7fja5m67bNtSrfolTQLXmx7LKALLFtTqgdHYew VL7GxkZBjQa7vgzBRTUvIoq0e5/oZj8rJnzW5fsHP9tfAY4H5e8JNumQolGunJHd3Gw01+ 8iPUH2Ss2tDss7/4JSAzWOOdsOyHaBd5fLrIOtBCstXsEp1aVRW8tpTfBnal0rmg+RlOlC KWLpw/p+lPumnM2RPSE07pabsFQG+qwDmnCia8gu+B9s1EUm3pK2vZ/3H+gZWg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1712789183; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=oS7SrzV2Wd9Ag3yMmGtoq7FlROh6d1Si5LvLo/AXQAY=; b=W+hc683y45YViYoAAxz/noNrfSafkVxzK32JLuNnIHY6uMGijv5KO1bND5iHfLzyr2Mc0z /Gt6w/cHE+JS0PAQ== From: Thomas Gleixner To: LKML Cc: Anna-Maria Behnsen , Frederic Weisbecker , John Stultz , Peter Zijlstra , Ingo Molnar , Stephen Boyd , Eric Biederman , Oleg Nesterov Subject: [patch V2 06/50] selftests/timers/posix-timers: Validate overrun after unblock References: <20240410164558.316665885@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Thu, 11 Apr 2024 00:46:22 +0200 (CEST) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When a timer signal is blocked and later unblocked then one signal should be delivered with the correct number of overruns since the timer was queued. Validate that behaviour. Signed-off-by: Thomas Gleixner --- tools/testing/selftests/timers/posix_timers.c | 61 +++++++++++++++++++++= ++++- 1 file changed, 60 insertions(+), 1 deletion(-) --- a/tools/testing/selftests/timers/posix_timers.c +++ b/tools/testing/selftests/timers/posix_timers.c @@ -540,10 +540,66 @@ static void check_gettime(int which, con ksft_test_result(wraps > 1, "check_gettime %s\n", name); } =20 +static void check_overrun(int which, const char *name) +{ + struct timespec start, now; + struct tmrsig tsig =3D { }; + struct itimerspec its; + struct sigaction sa; + struct sigevent sev; + timer_t timerid; + sigset_t set; + + sa.sa_flags =3D SA_SIGINFO; + sa.sa_sigaction =3D siginfo_handler; + sigemptyset(&sa.sa_mask); + if (sigaction(SIGUSR1, &sa, NULL)) + fatal_error(name, "sigaction()"); + + /* Block the signal */ + sigemptyset(&set); + sigaddset(&set, SIGUSR1); + if (sigprocmask(SIG_BLOCK, &set, NULL)) + fatal_error(name, "sigprocmask(SIG_BLOCK)"); + + memset(&sev, 0, sizeof(sev)); + sev.sigev_notify =3D SIGEV_SIGNAL; + sev.sigev_signo =3D SIGUSR1; + sev.sigev_value.sival_ptr =3D &tsig; + if (timer_create(which, &sev, &timerid)) + fatal_error(name, "timer_create()"); + + /* Start the timer to expire in 100ms and 100ms intervals */ + its.it_value.tv_sec =3D 0; + its.it_value.tv_nsec =3D 100000000; + its.it_interval.tv_sec =3D 0; + its.it_interval.tv_nsec =3D 100000000; + if (timer_settime(timerid, 0, &its, NULL)) + fatal_error(name, "timer_settime()"); + + if (clock_gettime(which, &start)) + fatal_error(name, "clock_gettime()"); + + do { + if (clock_gettime(which, &now)) + fatal_error(name, "clock_gettime()"); + } while (calcdiff_ns(now, start) < NSECS_PER_SEC); + + /* Unblock it, which should deliver a signal */ + if (sigprocmask(SIG_UNBLOCK, &set, NULL)) + fatal_error(name, "sigprocmask(SIG_UNBLOCK)"); + + if (timer_delete(timerid)) + fatal_error(name, "timer_delete()"); + + ksft_test_result(tsig.signals =3D=3D 1 && tsig.overruns =3D=3D 9, + "check_overrun %s\n", name); +} + int main(int argc, char **argv) { ksft_print_header(); - ksft_set_plan(15); + ksft_set_plan(18); =20 ksft_print_msg("Testing posix timers. False negative may happen on CPU ex= ecution \n"); ksft_print_msg("based timers if other threads run on the CPU...\n"); @@ -574,6 +630,9 @@ int main(int argc, char **argv) check_gettime(CLOCK_MONOTONIC, "CLOCK_MONOTONIC"); check_gettime(CLOCK_PROCESS_CPUTIME_ID, "CLOCK_PROCESS_CPUTIME_ID"); check_gettime(CLOCK_THREAD_CPUTIME_ID, "CLOCK_THREAD_CPUTIME_ID"); + check_overrun(CLOCK_MONOTONIC, "CLOCK_MONOTONIC"); + check_overrun(CLOCK_PROCESS_CPUTIME_ID, "CLOCK_PROCESS_CPUTIME_ID"); + check_overrun(CLOCK_THREAD_CPUTIME_ID, "CLOCK_THREAD_CPUTIME_ID"); =20 ksft_finished(); }