Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Fri, 21 Sep 2018 14:50:48 +0200
From:   Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     linux-kernel@vger.kernel.org,
        Daniel Wagner <daniel.wagner@siemens.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Will Deacon <will.deacon@arm.com>, x86@kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Boqun Feng <boqun.feng@gmail.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [Problem] Cache line starvation
Message-ID: <20180921125047.s5tnsji2esn6gkas@linutronix.de>
References: <20180921120226.6xjgr4oiho22ex75@linutronix.de>
 <alpine.DEB.2.21.1809211411030.14736@nanos.tec.linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <alpine.DEB.2.21.1809211411030.14736@nanos.tec.linutronix.de>
User-Agent: NeoMutt/20180716
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 2018-09-21 14:13:19 [+0200], Thomas Gleixner wrote:
> On Fri, 21 Sep 2018, Sebastian Andrzej Siewior wrote:
> > We reproducibly observe cache line starvation on a Core2Duo E6850 (2
> > cores), a i5-6400 SKL (4 cores) and on a NXP LS2044A ARM Cortex-A72 (4
> > cores).
> 
> We tried to reproduce on AMD, but so far no failure.

After tweaking the config a little, it just triggered after ~8 minutes
on a A10-7800.

> Thanks,
> 
> 	tglx

Sebastian