Hi, On 08/10/2014 19:38, Somnath Roy wrote: > Thanks Andres for sharing this. I will try those out. > BTW, I am using Ubuntu 14.04 LTS and couldn't find any sysfs entry like > 'cpufreq'.. > > root@stormeap-4:~# ll /sys/devices/system/cpu/cpu10/ > cache/ crash_notes driver/ microcode/ > online subsystem/ topology/ > cpuidle/ crash_notes_size firmware_node/ node0/ > power/ thermal_throttle/ uevent > > I am using Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz.
-rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu7/cpufreq/scaling_governor model name : Intel(R) Core(TM) i7-4900MQ CPU @ 2.80GHz $ lsb_release -d Description: Ubuntu Trusty Tahr (development branch) Cheers > > Regards > Somnath > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Andreas Bluemle > Sent: Wednesday, October 08, 2014 9:33 AM > To: [email protected] > Subject: Re: 10/7/2014 Weekly Ceph Performance Meeting: kernel boot params > > 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 <[email protected]> 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 [email protected] More majordomo >> info at http://vger.kernel.org/majordomo-info.html >> >> > > > > -- > Andreas Bluemle mailto:[email protected] > 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 [email protected] More majordomo info at > http://vger.kernel.org/majordomo-info.html > > ________________________________ > > PLEASE NOTE: The information contained in this electronic mail message is > intended only for the use of the designated recipient(s) named above. If the > reader of this message is not the intended recipient, you are hereby notified > that you have received this message in error and that any review, > dissemination, distribution, or copying of this message is strictly > prohibited. If you have received this communication in error, please notify > the sender by telephone or e-mail (as shown above) immediately and destroy > any and all copies of this message in your possession (whether hard copies or > electronically stored copies). > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Loïc Dachary, Artisan Logiciel Libre
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