From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Daniel Wagner <wagi@monom.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [ANNOUNCE] v5.9.1-rt19
Date: Tue, 27 Oct 2020 11:28:51 +0100 [thread overview]
Message-ID: <20201027102851.gizepjlu4opensqb@linutronix.de> (raw)
In-Reply-To: <20201027102547.y6wop7j2ovzg2tyx@beryllium.lan>
On 2020-10-27 11:25:47 [+0100], Daniel Wagner wrote:
> Well, one thing I need to figure out is how to get pi_stress working
> correctly on my machines (that is for all -rt trees, so it's nothing
> new). It consistently triggers RCU stall warnings with hackbench as
> workload. Clark told me the test only works if there are enough CPUs to
> run on. Need to look into it.
Is it running as a RT task? Do you have RCU-boosting enabled?
Otherwise it looks that if you throw enough non-RT load on the system,
RCU can not catch up which does not sound good.
Sebastian
next prev parent reply other threads:[~2020-10-27 10:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-24 9:18 [ANNOUNCE] v5.9.1-rt19 Sebastian Andrzej Siewior
2020-10-27 9:36 ` Daniel Wagner
2020-10-27 10:00 ` Sebastian Andrzej Siewior
2020-10-27 10:25 ` Daniel Wagner
2020-10-27 10:28 ` Sebastian Andrzej Siewior [this message]
2020-10-27 10:34 ` Daniel Wagner
2020-10-27 10:52 ` Daniel Wagner
2020-10-27 11:06 ` Sebastian Andrzej Siewior
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=20201027102851.gizepjlu4opensqb@linutronix.de \
--to=bigeasy@linutronix.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=wagi@monom.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).