linux-kernel - Re: [ANNOUNCE] v5.10-rc2-rt4

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Message-ID: <20201110180518.miuxa25j7lnn7f2q@linutronix.de>
Date:   Tue, 10 Nov 2020 19:05:18 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Daniel Wagner <wagi@...om.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [ANNOUNCE] v5.10-rc2-rt4

On 2020-11-09 15:37:03 [+0100], Daniel Wagner wrote:
> > I've been staring at the code of signaltest on Friday and I might need
> > to stare longer to figure out what it does.
> 
> I hear you. Anyway, I gave the current head a run with lazy preemption
> disabled as you asked for.

I just sent a few patches your way regarding signaltest. It should help
you with tracing. I've been playing with it on a juno box and I didn't
see anything odd. My max value was below 200us. I added a few tracing
bits. With sched, signal and hrtimer events you should be able to see
what delays the RT thread. I didn't see anything odd.

Sebastian