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From: Valentin Schneider <valentin.schneider@arm.com>
To: Josef Bacik <josef@toxicpanda.com>
Cc: peterz@infradead.org, vincent.guittot@linaro.org,
	torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
	linux-btrfs@vger.kernel.org
Subject: Re: [REGRESSION] 5-10% increase in IO latencies with nohz balance patch
Date: Mon, 29 Nov 2021 18:31:17 +0000	[thread overview]
Message-ID: <87bl22byq2.mognet@arm.com> (raw)
In-Reply-To: <YaUYsUHSKI5P2ulk@localhost.localdomain>

On 29/11/21 13:15, Josef Bacik wrote:
> On Mon, Nov 29, 2021 at 06:03:24PM +0000, Valentin Schneider wrote:
>> Would you happen to have execution traces by any chance? If not I should be
>> able to get one out of that fsperf thingie.
>>
>
> I don't, if you want to tell me how I can do it right now.  I've disabled
> everything on this box for now so it's literally just sitting there waiting to
> have things done to it.  Thanks,
>

I see you have Ftrace enabled in your config, so that ought to do it:

  trace-cmd record -e 'sched:*' -e 'cpu_idle' $your_test_cmd

> Josef

  reply	other threads:[~2021-11-29 18:33 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-29 17:03 [REGRESSION] 5-10% increase in IO latencies with nohz balance patch Josef Bacik
2021-11-29 18:03 ` Valentin Schneider
2021-11-29 18:15   ` Josef Bacik
2021-11-29 18:31     ` Valentin Schneider [this message]
2021-11-29 19:49       ` Josef Bacik
2021-11-30  0:26         ` Valentin Schneider
2021-12-03 12:03           ` Valentin Schneider
2021-12-03 19:00             ` Josef Bacik
2021-12-06  9:48               ` Valentin Schneider
2021-12-09 17:22                 ` Valentin Schneider
2021-12-09 19:16                   ` Josef Bacik
2021-12-22 12:42                     ` Thorsten Leemhuis
2021-12-22 16:07                       ` Valentin Schneider
2022-01-03 16:16                         ` Josef Bacik
2022-01-13 16:41                           ` Valentin Schneider
2022-01-13 16:57                             ` Roman Gushchin
2022-02-18 11:00                               ` Thorsten Leemhuis
2022-02-18 15:34                                 ` Josef Bacik
2021-11-30  7:16 ` Thorsten Leemhuis

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