linux-kernel - RE: [EXT] Re: stress-ng --hrtimers hangs system

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Message-ID: <AM0PR04MB47726B40110E1B02471EEEDF8A810@AM0PR04MB4772.eurprd04.prod.outlook.com>
Date:   Fri, 12 Jun 2020 00:49:17 +0000
From:   Jiafei Pan <jiafei.pan@....com>
To:     Kurt Kanzenbach <kurt.kanzenbach@...utronix.de>,
        Vladimir Oltean <olteanv@...il.com>
CC:     "linux-rt-users@...r.kernel.org" <linux-rt-users@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        "rcu@...r.kernel.org" <rcu@...r.kernel.org>,
        Colin King <colin.king@...onical.com>,
        Jiafei Pan <jiafei.pan@....com>
Subject: RE: [EXT] Re: stress-ng --hrtimers hangs system

Hi, Kurt,

May I know whether you used "root" user to run stress-ng? using "root" user will change the scheduler to be "SCHED_RR", so would you please share test result with root and non-root users? Thanks. 

Best Regards,
Jiafei.

-----Original Message-----
From: linux-rt-users-owner@...r.kernel.org <linux-rt-users-owner@...r.kernel.org> On Behalf Of Kurt Kanzenbach
Sent: Wednesday, June 10, 2020 1:58 PM
To: Vladimir Oltean <olteanv@...il.com>
Cc: linux-rt-users@...r.kernel.org; lkml <linux-kernel@...r.kernel.org>; rcu@...r.kernel.org; Colin King <colin.king@...onical.com>
Subject: [EXT] Re: stress-ng --hrtimers hangs system

Hi Vladimir,

On Tue Jun 09 2020, Vladimir Oltean wrote:
> Just out of curiosity, what and how many CPU cores does your ARM64 box 
> have, and what frequency are you running them at?
> Mine is a dual-core A72 machine running at 1500 MHz.

That particular machine has a dual core Cortex A53 running at 1GHz.

Thanks,
Kurt