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 <mark.nelson@xxxxxxxxxxx> 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@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- Andreas Bluemle mailto:Andreas.Bluemle@xxxxxxxxxxx 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 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
