From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Bluemle Subject: Re: 10/7/2014 Weekly Ceph Performance Meeting: kernel boot params Date: Wed, 8 Oct 2014 18:32:34 +0200 Message-ID: <20141008183234.19a24ac1@doppio> References: <54348A89.1060906@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mail.itxperts.de ([212.202.108.166]:47337 "EHLO mail.itxperts.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751323AbaJHQch (ORCPT ); Wed, 8 Oct 2014 12:32:37 -0400 Received: from itxmail.itxperts.de (qgate_dmz.itxperts.de [192.168.160.1]) by mail.itxperts.de (8.14.0/8.14.0) with ESMTP id s98GWZhs005602 for ; Wed, 8 Oct 2014 18:32:36 +0200 Received: from doppio (doppio.itxperts.de [192.168.140.7]) by itxmail.itxperts.de (Postfix) with ESMTP id E39E413F02 for ; Wed, 8 Oct 2014 18:24:52 +0200 (CEST) In-Reply-To: <54348A89.1060906@redhat.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: "ceph-devel@vger.kernel.org" Hi, as mentioned during today's meeting, here are the kernel boot parameters which I found to provide the basis for good performance results: processor.max_cstate=0 intel_idle.max_cstate=0 I understand these to basically turn off any power saving modes of the CPU; the CPU's we are using are like Intel(R) Xeon(R) CPU E5-2640 v2 @ 2.00GHz Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz At the BIOS level, we - turn off Hyperthraeding - turn off Turbo mode (in order ot not leave the specifications) - turn on frequency floor override We also assert that /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor is set to "performance" Using above we see a constant frequency at the maximum level allowed by the CPU (except Turbo mode). Best Regards Andreas Bluemle On Wed, 8 Oct 2014 02:51:21 +0200 Mark Nelson wrote: > Hi All, > > Just a remind that the weekly performance meeting is on Wednesdays at > 8AM PST. Same bat time, same bat channel! > > Etherpad URL: > http://pad.ceph.com/p/performance_weekly > > To join the Meeting: > https://bluejeans.com/268261044 > > To join via Browser: > https://bluejeans.com/268261044/browser > > To join with Lync: > https://bluejeans.com/268261044/lync > > > To join via Room System: > Video Conferencing System: bjn.vc -or- 199.48.152.152 > Meeting ID: 268261044 > > To join via Phone: > 1) Dial: > +1 408 740 7256 > +1 888 240 2560(US Toll Free) > +1 408 317 9253(Alternate Number) > (see all numbers - http://bluejeans.com/numbers) > 2) Enter Conference ID: 268261044 > > Mark > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" > in the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- Andreas Bluemle mailto:Andreas.Bluemle@itxperts.de ITXperts GmbH http://www.itxperts.de Balanstrasse 73, Geb. 08 Phone: (+49) 89 89044917 D-81541 Muenchen (Germany) Fax: (+49) 89 89044910 Company details: http://www.itxperts.de/imprint.htm