From: Norbert <nbrtt01@gmail.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Yunfeng Ye <yeyunfeng@huawei.com>,
frederic@kernel.org
Subject: Re: Performance regression: thread wakeup time (latency) increased up to 3x
Date: Mon, 1 Nov 2021 18:35:05 -0700 [thread overview]
Message-ID: <8957c970-88f2-40a8-835f-062ed7a982af@gmail.com> (raw)
In-Reply-To: <70998f86-74d7-7ced-867e-f17695bc88e7@gmail.com>
On 10/23/21 22:09, Norbert wrote:
> (The more important part being SCHED_FIFO.)
Please ignore this side-comment. The decisive factor is
isolated/nohz_full vs normal.
There are indications that "normal" times have become worse lately
(measured in 5.14.14), relative to earlier, but in that area the
fluctuations I see in my current tests are too large to get a clear picture.
Best, Norbert
prev parent reply other threads:[~2021-11-02 1:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 7:43 Performance regression: thread wakeup time (latency) increased up to 3x Norbert
2021-10-15 8:52 ` Peter Zijlstra
2021-10-15 9:36 ` Norbert
2021-10-15 14:04 ` Steven Rostedt
2021-10-16 4:08 ` Norbert
2021-10-18 11:25 ` Peter Zijlstra
2021-10-19 1:56 ` Norbert
2021-10-19 7:01 ` Norbert
2021-11-07 15:56 ` Frederic Weisbecker
2021-11-08 15:56 ` Norbert
2021-10-22 13:03 ` Rafael J. Wysocki
2021-10-24 5:09 ` Norbert
2021-11-02 1:35 ` Norbert [this message]
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=8957c970-88f2-40a8-835f-062ed7a982af@gmail.com \
--to=nbrtt01@gmail.com \
--cc=frederic@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=rjw@rjwysocki.net \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=yeyunfeng@huawei.com \
/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