Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Tue, 10 Nov 2020 19:05:18 +0100
From:   Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To:     Daniel Wagner <wagi@monom.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-rt-users <linux-rt-users@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [ANNOUNCE] v5.10-rc2-rt4
Message-ID: <20201110180518.miuxa25j7lnn7f2q@linutronix.de>
References: <20201104103809.bhl2iorbwv6xowtw@beryllium.lan>
 <20201104104617.ueefmpdou4t3t2ce@linutronix.de>
 <20201104111948.vpykh3ptmysqhmve@beryllium.lan>
 <20201104124746.74jdsig3dffomv3k@beryllium.lan>
 <20201104130930.llx56gtqt532h7c7@linutronix.de>
 <20201104160650.b63zqof74wohgpa2@beryllium.lan>
 <20201106105447.2lasulgjrbqdhnlh@linutronix.de>
 <20201106161413.7c65uxenamy474uh@beryllium.lan>
 <20201109124718.ljf7inok4zakkjed@linutronix.de>
 <20201109143703.ps7gxhqrirhntilr@beryllium.lan>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <20201109143703.ps7gxhqrirhntilr@beryllium.lan>
Precedence: bulk

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