From: Philippe Gerum <rpm@xenomai.org>
To: Russell Johnson <russell.johnson@kratosdefense.com>
Cc: "xenomai@lists.linux.dev" <xenomai@lists.linux.dev>
Subject: Re: System hanging when using condition variables
Date: Tue, 20 Sep 2022 08:55:20 +0200 [thread overview]
Message-ID: <87edw6pm6r.fsf@xenomai.org> (raw)
In-Reply-To: <PH1P110MB10500CC96F6D84D2026A6F63E24D9@PH1P110MB1050.NAMP110.PROD.OUTLOOK.COM>
Russell Johnson <russell.johnson@kratosdefense.com> writes:
> [[S/MIME Signed Part:Undecided]]
> Hello,
>
>
>
> I have been trying to debug an issue in our app where the entire system hangs with the following error from the kernel: “kernel:watchdog:
> BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:2:594]”. This happens consistently on every run. I was able to strip down all of the
> relevant code into a simple standalone app that only uses 4 pthreads, 3 EVL events, and 3 EVL mutexes if you would like to be able to
> re-create the issue (I have attached the test file). Is there anything fundamentally flawed in this logic (the same logic worked fine previously
> with STL condition variables and STL mutexes)? It appears that there becomes some kind of deadlock in the kernel due to an EVL event
> and/or EVL mutex. Let me know if there is any more information that I can provide you to help clear up the scenario. I have spent multiple
> weeks tracking this issue with no luck so far.
>
>
>
> Thanks,
>
>
>
> Russell
>
> [4. application/octet-stream; test.cpp]...
>
> [[End of S/MIME Signed Part]]
Ok, thanks for the test code. I'll have a look at this issue asap. Is
this [1] patch in your test kernel already?
[1] https://source.denx.de/Xenomai/xenomai4/linux-evl/-/commit/dde9fa8fbc34e101f5c73d719d4d0ea5e420e3c6
--
Philippe.
next prev parent reply other threads:[~2022-09-20 6:58 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-19 21:38 System hanging when using condition variables Russell Johnson
2022-09-20 6:55 ` Philippe Gerum [this message]
2022-09-20 14:31 ` [External] - " Russell Johnson
2022-09-21 14:53 ` Russell Johnson
2022-09-22 14:26 ` Philippe Gerum
2022-09-22 15:25 ` [External] - " Bryan Butler
2022-09-23 19:56 ` Bryan Butler
2022-09-24 8:21 ` Philippe Gerum
2022-09-25 14:59 ` Philippe Gerum
2022-09-25 16:32 ` Philippe Gerum
2022-09-26 14:20 ` Bryan Butler
2022-09-27 22:05 ` Russell Johnson
2022-09-27 23:04 ` Russell Johnson
2022-09-28 1:08 ` Bryan Butler
2022-09-28 10:06 ` Philippe Gerum
2022-09-28 10:37 ` Philippe Gerum
2022-09-28 9:59 ` Philippe Gerum
2022-09-28 18:35 ` Russell Johnson
2022-09-29 7:04 ` Philippe Gerum
2022-09-29 18:32 ` Russell Johnson
2022-10-01 4:38 ` Russell Johnson
2022-10-04 15:50 ` Philippe Gerum
2022-10-10 17:04 ` Russell Johnson
2022-10-12 16:11 ` Russell Johnson
2022-10-12 16:24 ` Eric Kuzara
2022-11-03 18:13 ` Philippe Gerum
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