From: Mike Galbraith <efault@gmx.de>
To: Heiner Kallweit <hkallweit1@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: r8169: disable ASPM during NAPI poll locking changes --> BUG: Invalid wait context --> PREEMPT_RT pain
Date: Sun, 21 May 2023 16:27:10 +0200 [thread overview]
Message-ID: <28727b435c143f15feddffb4c29095fee2500dff.camel@gmx.de> (raw)
In-Reply-To: <e55be0ae115ad6494ebb48fecd03e5c2fe528230.camel@gmx.de>
On Sun, 2023-05-21 at 08:03 +0200, Mike Galbraith wrote:
> Greetings,
>
> The locks added to prep for $subject induce invalid context moaning due
> to not being raw locks, but if I do that, the hold time does very bad
> things to RT.
The locks aren't really 160us horrible. The GPU was enabled (oops),
nouveau then makes box horrible for RT (and graphics:). With GPU
turned back off, the largest trace I saw was 77us, which jibes pretty
well with new max of low to mid 50s without ftrace running, or up a tad
over 20us for this now pretty old commodity i7 desktop box.
-Mike
next prev parent reply other threads:[~2023-05-21 14:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-21 6:03 Mike Galbraith
2023-05-21 14:27 ` Mike Galbraith [this message]
2023-05-22 8:06 ` Sebastian Andrzej Siewior
2023-05-22 10:32 ` Heiner Kallweit
2023-05-22 10:34 ` Sebastian Andrzej Siewior
2023-05-22 10:41 ` Mike Galbraith
2023-05-22 13:43 ` Sebastian Andrzej Siewior
2023-05-22 17:02 ` Mike Galbraith
2023-05-22 17:12 ` Mike Galbraith
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