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From: Norbert <nbrtt01@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: Performance regression: thread wakeup time (latency) increased up to 3x
Date: Fri, 15 Oct 2021 02:36:03 -0700	[thread overview]
Message-ID: <5fe0ffa5-f2db-ca79-5a10-305310066ff9@gmail.com> (raw)
In-Reply-To: <YWlBUVDy9gOMiXls@hirez.programming.kicks-ass.net>

On 10/15/21 01:52, Peter Zijlstra wrote:
> On Fri, Oct 15, 2021 at 12:43:45AM -0700, Norbert wrote:
>> Performance regression: thread wakeup time (latency) increased up to 3x.
>>
>> Happened between 5.13.8 and 5.14.0. Still happening at least on 5.14.11.
> 
> Could you git-bisect this?
> 

So far I haven't built a kernel yet, I'm quite new to Linux in that way, 
so it may take me some time to figure it all out, but yes.

(By the way, of course I meant that throughput *de*creases, not increases.)

  reply	other threads:[~2021-10-15  9:36 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 [this message]
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

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