From: Costa Shulyupin <costa.shul@redhat.com>
To: longman@redhat.com, pauld@redhat.com, juri.lelli@redhat.com,
prarit@redhat.com, vschneid@redhat.com,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Zefan Li <lizefan.x@bytedance.com>, Tejun Heo <tj@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Petr Mladek <pmladek@suse.com>,
Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Randy Dunlap <rdunlap@infradead.org>,
Yoann Congal <yoann.congal@smile.fr>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Nhat Pham <nphamcs@gmail.com>,
Costa Shulyupin <costa.shul@redhat.com>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org
Subject: [PATCH v1 5/7] [NOT-FOR-MERGE] test timers affinity adjustment
Date: Thu, 16 May 2024 22:04:35 +0300 [thread overview]
Message-ID: <20240516190437.3545310-6-costa.shul@redhat.com> (raw)
In-Reply-To: <20240516190437.3545310-1-costa.shul@redhat.com>
There must be no timers on the specified cpu
at the end of timers_resettle_from_cpu.
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
---
kernel/time/timer.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 2d15c0e7b0550..b7d253d230453 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -2658,6 +2658,27 @@ int timers_prepare_cpu(unsigned int cpu)
return 0;
}
+static int count_timers(int cpu)
+{
+ struct timer_base *base;
+ int b, v, count = 0;
+
+ for (b = 0; b < NR_BASES; b++) {
+ base = per_cpu_ptr(&timer_bases[b], cpu);
+ raw_spin_lock_irq(&base->lock);
+
+ for (v = 0; v < WHEEL_SIZE; v++) {
+ struct hlist_node *c;
+
+ hlist_for_each(c, base->vectors + v)
+ count++;
+ }
+ raw_spin_unlock_irq(&base->lock);
+ }
+
+ return count;
+}
+
/**
* timers_resettle_from_cpu - resettles timers from
* specified cpu to housekeeping cpus.
@@ -2697,6 +2718,7 @@ void timers_resettle_from_cpu(unsigned int cpu)
raw_spin_unlock_irq(&new_base->lock);
}
local_irq_enable();
+ WARN_ON(count_timers(cpu));
}
int timers_dead_cpu(unsigned int cpu)
--
2.45.0
next prev parent reply other threads:[~2024-05-16 19:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-16 19:04 [PATCH v1 0/7] sched: Adjust affinity according to change of housekeeping cpumask Costa Shulyupin
2024-05-16 19:04 ` [PATCH v1 1/7] sched/isolation: Add infrastructure to adjust affinity for dynamic CPU isolation Costa Shulyupin
2024-05-17 21:37 ` Thomas Gleixner
2024-05-16 19:04 ` [PATCH v1 2/7] sched/isolation: Adjust affinity of timers according to change of housekeeping cpumask Costa Shulyupin
2024-05-17 22:39 ` Thomas Gleixner
2024-05-17 22:52 ` Thomas Gleixner
2024-05-16 19:04 ` [PATCH v1 3/7] sched/isolation: Adjust affinity of hrtimers " Costa Shulyupin
2024-05-17 23:42 ` Thomas Gleixner
2024-05-16 19:04 ` [PATCH v1 4/7] sched/isolation: Adjust affinity of managed irqs " Costa Shulyupin
2024-05-18 1:17 ` Thomas Gleixner
2024-05-18 1:25 ` Thomas Gleixner
2024-05-16 19:04 ` Costa Shulyupin [this message]
2024-05-16 19:04 ` [PATCH v1 6/7] [NOT-FOR-MERGE] test timers and hrtimers affinity adjustment Costa Shulyupin
2024-05-16 19:04 ` [PATCH v1 7/7] [NOT-FOR-MERGE] test managed irqs " Costa Shulyupin
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=20240516190437.3545310-6-costa.shul@redhat.com \
--to=costa.shul@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=anna-maria@linutronix.de \
--cc=bristot@redhat.com \
--cc=bsegall@google.com \
--cc=cgroups@vger.kernel.org \
--cc=dietmar.eggemann@arm.com \
--cc=frederic@kernel.org \
--cc=gustavoars@kernel.org \
--cc=hannes@cmpxchg.org \
--cc=juri.lelli@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lizefan.x@bytedance.com \
--cc=longman@redhat.com \
--cc=masahiroy@kernel.org \
--cc=mgorman@suse.de \
--cc=mingo@redhat.com \
--cc=nphamcs@gmail.com \
--cc=pauld@redhat.com \
--cc=peterz@infradead.org \
--cc=pmladek@suse.com \
--cc=prarit@redhat.com \
--cc=rdunlap@infradead.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=vincent.guittot@linaro.org \
--cc=vschneid@redhat.com \
--cc=yoann.congal@smile.fr \
/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 read-only IMAP folder(s) and NNTP newsgroup(s).