From nobody Fri Dec 19 21:46:41 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 59F371459E3 for ; Mon, 10 Jun 2024 16:42:17 +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=1718037738; cv=none; b=LYcmu4JnorW7cIwIw4CzeBFMlYIWXJxuZbkrxkuV5wYj2Qreev/cJLPEftGgvgFY7gwUkMJ5yTpJU2olI7bNAURH+X312TyQTu9e369/50MqY8e5/Oo0RHdFG9qXXeL4s1SqbmFS5bkICTvJPLCZKer4vJBGiA0Ciu4bwFJ8Jj8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718037738; c=relaxed/simple; bh=Jz7RJXZF/wpnmhSKslp2B8lopo6bOLwGJ9GuQe5xSbw=; h=Message-ID:From:To:Cc:Subject:References:MIME-Version: Content-Type:Date; b=ujLs5UudrZs+jb1cOIFnqefvMzxnVOSMuwC6Vm2yta8ZT/+XJeGdG/JcoKhpuEZhOVArnDuKPTnfz9wNuCrXU3IW4Oohcqqzrs14KXyl1mhj+UnysQ97mQYu1XpGw9eiTNt6qYE+ZZe68M4Ocdy7xSKbo3PPZInjf6CJgdLLj2g= 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=SLboMHul; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=lZ99rRfz; 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="SLboMHul"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="lZ99rRfz" Message-ID: <20240610164025.833739199@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1718037733; 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=SLboMHulqbAU78PDwvYlC230/wjCP2JGpchgUKhRDuA/m3MKMfrkT2hOA6sG0M6xcAdACp 5BVGhJFhGt5jfV4CzArspK8Xm5ucUFcHyQo5xCs66oVYpHPUsM+WY6IQaivVBTet5xKD0D vfemF24gHqyz4OC0fiJ33VQ0i13b3UZrBRf+ACusWzR184Ez4wy3Bvn6+X5EL6IKfFjMur Yf75OqYbF1yg/eCTUYZwW4P3PFssK4jwlR9izFuTcyOBqeTisuzJTTjuUAJnVQ1waA7i/x jYENJ3xUyQbiDb7Y6orD3hOVb7anqF3v+eCDcE/hwQsGFXD7NuF5Cr8fTI1TeQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1718037733; 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=lZ99rRfzJK1+g1S5HZtI3ARgZ0iPRWDgHoy+IjBeWdkwqbJbWB2DGGCx2L3rytgUpkB6WB ENMMZM7iW/aXlPBA== 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 V3 06/51] selftests/timers/posix-timers: Validate overrun after unblock References: <20240610163452.591699700@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Mon, 10 Jun 2024 18:42:12 +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(); }