From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: Understanding cyclictest result Date: Fri, 3 Feb 2017 16:27:19 +0100 Message-ID: <20170203152719.ldomq7rvqtdyoui3@linutronix.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Cc: linux-rt-users@vger.kernel.org To: Ran Shalit Return-path: Received: from Galois.linutronix.de ([146.0.238.70]:44544 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750828AbdBCP1W (ORCPT ); Fri, 3 Feb 2017 10:27:22 -0500 Content-Disposition: inline In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 2017-02-03 10:13:15 [+0200], Ran Shalit wrote: > Hello, Hello, … > and got max value of 180usec. > > On comparing my results to resuls examples given in > https://rt.wiki.kernel.org/index.php/Cyclictest > it seems like a very large number. > I know it depends on hardware (I am using Atom, one core only.), yet > becuase I'm not too experienced with it, I am not sure if my real > problem is HW or doing wrong testing/RTpatch. > I also see that it is much better then results before applying RT > patch (3000usec) So Carsten has - Atom Z530 @1600 MHz with 382us [0] - Atom N2800 @1860 MHz with 43us [1] [0] https://www.osadl.org/Profile-of-system-in-rack-1-slot-8.qa-profile-r1s8.0.html#hwlats [1] https://www.osadl.org/Profile-of-system-in-rack-c-slot-4.qa-profile-rcs4.0.html#hwlats > Best Regards, > Ran Sebastian