From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Anna-Maria Behnsen <anna-maria@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
John Stultz <jstultz@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
Eric Biederman <ebiederm@xmission.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: [patch V2 04/50] selftests/timers/posix-timers: Validate SIGEV_NONE
Date: Thu, 11 Apr 2024 00:46:19 +0200 (CEST) [thread overview]
Message-ID: <20240410165551.188561268@linutronix.de> (raw)
In-Reply-To: 20240410164558.316665885@linutronix.de
Posix timers with a delivery mode of SIGEV_NONE deliver no signals but the
remaining expiry time must be readable via timer_gettime() for both one
shot and interval timers.
That's implemented correctly for regular posix timers but broken for posix
CPU timers.
Add a self test so the fixes can be verified.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
tools/testing/selftests/timers/posix_timers.c | 53 +++++++++++++++++++++++++-
1 file changed, 52 insertions(+), 1 deletion(-)
--- a/tools/testing/selftests/timers/posix_timers.c
+++ b/tools/testing/selftests/timers/posix_timers.c
@@ -11,6 +11,7 @@
#include <sys/types.h>
#include <stdio.h>
#include <signal.h>
+#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
@@ -20,6 +21,7 @@
#define DELAY 2
#define USECS_PER_SEC 1000000
+#define NSECS_PER_SEC 1000000000
static void __fatal_error(const char *test, const char *name, const char *what)
{
@@ -438,10 +440,57 @@ static void check_delete(void)
ksft_test_result(!tsig.signals, "check_delete\n");
}
+static inline int64_t calcdiff_ns(struct timespec t1, struct timespec t2)
+{
+ int64_t diff;
+
+ diff = NSECS_PER_SEC * (int64_t)((int) t1.tv_sec - (int) t2.tv_sec);
+ diff += ((int) t1.tv_nsec - (int) t2.tv_nsec);
+ return diff;
+}
+
+static void check_sigev_none(int which, const char *name)
+{
+ struct timespec start, now;
+ struct itimerspec its;
+ struct sigevent sev;
+ timer_t timerid;
+
+ memset(&sev, 0, sizeof(sev));
+ sev.sigev_notify = SIGEV_NONE;
+
+ 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 = 0;
+ its.it_value.tv_nsec = 100000000;
+ its.it_interval.tv_sec = 0;
+ its.it_interval.tv_nsec = 100000000;
+ timer_settime(timerid, 0, &its, NULL);
+
+ 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);
+
+ if (timer_gettime(timerid, &its))
+ fatal_error(name, "timer_gettime()");
+
+ if (timer_delete(timerid))
+ fatal_error(name, "timer_delete()");
+
+ ksft_test_result(its.it_value.tv_sec || its.it_value.tv_nsec,
+ "check_sigev_none %s\n", name);
+}
+
int main(int argc, char **argv)
{
ksft_print_header();
- ksft_set_plan(10);
+ ksft_set_plan(12);
ksft_print_msg("Testing posix timers. False negative may happen on CPU execution \n");
ksft_print_msg("based timers if other threads run on the CPU...\n");
@@ -467,6 +516,8 @@ int main(int argc, char **argv)
check_sig_ign(1);
check_rearm();
check_delete();
+ check_sigev_none(CLOCK_MONOTONIC, "CLOCK_MONOTONIC");
+ check_sigev_none(CLOCK_PROCESS_CPUTIME_ID, "CLOCK_PROCESS_CPUTIME_ID");
ksft_finished();
}
next prev parent reply other threads:[~2024-04-10 22:46 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-10 22:46 [patch V2 00/50] posix-timers: Cure inconsistencies and the SIG_IGN mess Thomas Gleixner
2024-04-10 22:46 ` [patch V2 01/50] selftests/timers/posix_timers: Simplify error handling Thomas Gleixner
2024-04-12 7:35 ` Anna-Maria Behnsen
2024-04-10 22:46 ` [patch V2 02/50] selftests/timers/posix_timers: Add SIG_IGN test Thomas Gleixner
2024-04-10 22:46 ` [patch V2 03/50] selftests/timers/posix_timers: Validate signal rules Thomas Gleixner
2024-04-10 22:46 ` Thomas Gleixner [this message]
2024-04-10 22:46 ` [patch V2 05/50] selftests/timers/posix-timers: Validate timer_gettime() Thomas Gleixner
2024-04-10 22:46 ` [patch V2 06/50] selftests/timers/posix-timers: Validate overrun after unblock Thomas Gleixner
2024-04-10 22:46 ` [patch V2 07/50] posix-cpu-timers: Split up posix_cpu_timer_get() Thomas Gleixner
2024-04-12 7:35 ` Anna-Maria Behnsen
2024-04-12 18:25 ` Eric W. Biederman
2024-04-12 19:48 ` Thomas Gleixner
2024-04-16 14:44 ` Oleg Nesterov
2024-04-17 9:21 ` Anna-Maria Behnsen
2024-04-17 11:08 ` Oleg Nesterov
2024-04-17 20:33 ` Frederic Weisbecker
2024-04-10 22:46 ` [patch V2 08/50] posix-cpu-timers: Save interval only for armed timers Thomas Gleixner
2024-04-11 14:25 ` Anna-Maria Behnsen
2024-04-11 22:00 ` Thomas Gleixner
2024-04-10 22:46 ` [patch V2 09/50] posix-cpu-timers: Handle interval timers correctly in timer_get() Thomas Gleixner
2024-04-17 22:50 ` Frederic Weisbecker
2024-04-10 22:46 ` [patch V2 10/50] posix-cpu-timers: Handle SIGEV_NONE " Thomas Gleixner
2024-04-12 18:40 ` Eric W. Biederman
2024-04-12 19:49 ` Thomas Gleixner
2024-04-10 22:46 ` [patch V2 11/50] posix-cpu-timers: Handle SIGEV_NONE timers correctly in timer_set() Thomas Gleixner
2024-04-11 15:48 ` Anna-Maria Behnsen
2024-04-11 22:02 ` Thomas Gleixner
2024-04-17 23:04 ` Frederic Weisbecker
2024-04-10 22:46 ` [patch V2 12/50] posix-cpu-timers: Replace old expiry retrieval in posix_cpu_timer_set() Thomas Gleixner
2024-04-15 14:03 ` Anna-Maria Behnsen
2024-04-10 22:46 ` [patch V2 13/50] posix-cpu-timers: Do not arm SIGEV_NONE timers Thomas Gleixner
2024-04-15 14:03 ` Anna-Maria Behnsen
2024-04-10 22:46 ` [patch V2 14/50] posix-cpu-timers: Use @now instead of @val for clarity Thomas Gleixner
2024-04-10 22:46 ` [patch V2 15/50] posix-cpu-timers: Remove incorrect comment in posix_cpu_timer_set() Thomas Gleixner
2024-04-10 22:46 ` [patch V2 16/50] posix-cpu-timers: Simplify posix_cpu_timer_set() Thomas Gleixner
2024-04-15 15:28 ` Anna-Maria Behnsen
2024-04-10 22:46 ` [patch V2 17/50] posix-timers: Retrieve interval in common timer_settime() code Thomas Gleixner
2024-04-15 15:43 ` Anna-Maria Behnsen
2024-04-10 22:46 ` [patch V2 18/50] posix-timers: Clear overrun in common_timer_set() Thomas Gleixner
2024-04-10 22:46 ` [patch V2 19/50] posix-timers: Convert timer list to hlist Thomas Gleixner
2024-04-10 22:46 ` [patch V2 20/50] posix-timers: Consolidate timer setup Thomas Gleixner
2024-04-16 16:12 ` Anna-Maria Behnsen
2024-04-23 19:38 ` Thomas Gleixner
2024-04-10 22:46 ` [patch V2 21/50] posix-cpu-timers: Make k_itimer::it_active consistent Thomas Gleixner
2024-04-17 10:11 ` Anna-Maria Behnsen
2024-04-10 22:46 ` [patch V2 22/50] posix-timers: Consolidate signal queueing Thomas Gleixner
2024-04-10 22:46 ` [patch V2 23/50] signal: Remove task argument from dequeue_signal() Thomas Gleixner
2024-04-18 14:18 ` Oleg Nesterov
2024-04-10 22:46 ` [patch V2 24/50] signal: Replace BUG_ON()s Thomas Gleixner
2024-04-18 14:37 ` Oleg Nesterov
2024-04-10 22:46 ` [patch V2 25/50] signal: Confine POSIX_TIMERS properly Thomas Gleixner
2024-04-17 12:09 ` Anna-Maria Behnsen
2024-04-18 15:23 ` Oleg Nesterov
2024-04-19 5:42 ` Thomas Gleixner
2024-04-10 22:46 ` [patch V2 26/50] signal: Get rid of resched_timer logic Thomas Gleixner
2024-04-18 16:38 ` Oleg Nesterov
2024-04-18 18:18 ` Oleg Nesterov
2024-04-19 11:06 ` Oleg Nesterov
2024-04-23 21:18 ` Thomas Gleixner
2024-04-24 1:48 ` Thomas Gleixner
2024-04-25 7:22 ` Andrei Vagin
2024-04-10 22:46 ` [patch V2 27/50] posix-timers: Cure si_sys_private race Thomas Gleixner
2024-04-10 22:47 ` [patch V2 28/50] signal: Allow POSIX timer signals to be dropped Thomas Gleixner
2024-04-10 22:47 ` [patch V2 29/50] posix-timers: Drop signal if timer has been deleted or reprogrammed Thomas Gleixner
2024-04-10 22:47 ` [patch V2 30/50] posix-timers: Rename k_itimer::it_requeue_pending Thomas Gleixner
2024-04-10 22:47 ` [patch V2 31/50] posix-timers: Add proper state tracking Thomas Gleixner
2024-04-17 13:40 ` Anna-Maria Behnsen
2024-04-10 22:47 ` [patch V2 32/50] posix-timers: Make signal delivery consistent Thomas Gleixner
2024-04-18 10:29 ` Anna-Maria Behnsen
2024-04-10 22:47 ` [patch V2 33/50] posix-timers: Make signal overrun accounting sensible Thomas Gleixner
2024-04-10 22:47 ` [patch V2 34/50] posix-cpu-timers: Use dedicated flag for CPU timer nanosleep Thomas Gleixner
2024-04-10 22:47 ` [patch V2 35/50] posix-timers: Add a refcount to struct k_itimer Thomas Gleixner
2024-04-10 22:47 ` [patch V2 36/50] signal: Split up __sigqueue_alloc() Thomas Gleixner
2024-04-10 22:47 ` [patch V2 37/50] signal: Provide posixtimer_sigqueue_init() Thomas Gleixner
2024-04-10 22:47 ` [patch V2 38/50] signal: Add sys_private_ptr to siginfo::_sifields::_timer Thomas Gleixner
2024-04-10 22:47 ` [patch V2 39/50] posix-timers: Store PID type in the timer Thomas Gleixner
2024-04-10 22:47 ` [patch V2 40/50] signal: Refactor send_sigqueue() Thomas Gleixner
2024-04-10 22:47 ` [patch V2 41/50] posix-timers: Embed sigqueue in struct k_itimer Thomas Gleixner
2024-04-10 22:47 ` [patch V2 42/50] signal: Cleanup unused posix-timer leftovers Thomas Gleixner
2024-04-10 22:47 ` [patch V2 43/50] signal: Add task argument to flush_sigqueue_mask() Thomas Gleixner
2024-04-10 22:47 ` [patch V2 44/50] signal: Provide ignored_posix_timers list Thomas Gleixner
2024-04-10 22:47 ` [patch V2 45/50] posix-timers: Handle ignored list on delete and exit Thomas Gleixner
2024-04-10 22:47 ` [patch V2 46/50] signal: Handle ignored signals in do_sigaction(action != SIG_IGN) Thomas Gleixner
2024-04-10 22:47 ` [patch V2 47/50] signal: Queue ignored posixtimers on ignore list Thomas Gleixner
2024-04-10 22:47 ` [patch V2 48/50] posix-timers: Cleanup SIG_IGN workaround leftovers Thomas Gleixner
2024-04-10 22:47 ` [patch V2 49/50] alarmtimers: Remove the throttle mechanism from alarm_forward_now() Thomas Gleixner
2024-04-10 22:47 ` [patch V2 50/50] alarmtimers: Remove return value from alarm functions Thomas Gleixner
2024-04-15 12:30 ` [PATCH] posix-timers: Handle returned errors poperly in [i]timer_delete() Anna-Maria Behnsen
2024-04-15 13:00 ` Oleg Nesterov
2024-04-15 14:15 ` Anna-Maria Behnsen
2024-04-15 16:27 ` Oleg Nesterov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240410165551.188561268@linutronix.de \
--to=tglx@linutronix.de \
--cc=anna-maria@linutronix.de \
--cc=ebiederm@xmission.com \
--cc=frederic@kernel.org \
--cc=jstultz@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=oleg@redhat.com \
--cc=peterz@infradead.org \
--cc=sboyd@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).