From mboxrd@z Thu Jan 1 00:00:00 1970 From: Loic Dachary Subject: Re: 10/7/2014 Weekly Ceph Performance Meeting: kernel boot params Date: Wed, 08 Oct 2014 19:57:56 +0200 Message-ID: <54357B24.4040106@dachary.org> References: <54348A89.1060906@redhat.com> <20141008183234.19a24ac1@doppio> <755F6B91B3BE364F9BCA11EA3F9E0C6F2785D4C1@SACMBXIP02.sdcorp.global.sandisk.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="uw300Ai1d3ok7jsA3va3jdKHBPGTDjlDe" Return-path: Received: from mail2.dachary.org ([91.121.57.175]:40462 "EHLO smtp.dmail.dachary.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754557AbaJHR6F (ORCPT ); Wed, 8 Oct 2014 13:58:05 -0400 In-Reply-To: <755F6B91B3BE364F9BCA11EA3F9E0C6F2785D4C1@SACMBXIP02.sdcorp.global.sandisk.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Somnath Roy , Andreas Bluemle , "ceph-devel@vger.kernel.org" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --uw300Ai1d3ok7jsA3va3jdKHBPGTDjlDe Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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'.. >=20 > 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 >=20 > 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/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu1/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu2/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu3/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu4/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu5/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu6/c= pufreq/scaling_governor -rw-r--r-- 1 root root 4096 oct. 8 17:31 /sys/devices/system/cpu/cpu7/c= pufreq/scaling_governor model name : Intel(R) Core(TM) i7-4900MQ CPU @ 2.80GHz $ lsb_release -d Description: Ubuntu Trusty Tahr (development branch) Cheers >=20 > Regards > Somnath >=20 > -----Original Message----- > From: ceph-devel-owner@vger.kernel.org [mailto:ceph-devel-owner@vger.ke= rnel.org] On Behalf Of Andreas Bluemle > Sent: Wednesday, October 08, 2014 9:33 AM > To: ceph-devel@vger.kernel.org > Subject: Re: 10/7/2014 Weekly Ceph Performance Meeting: kernel boot par= ams >=20 > Hi, >=20 > as mentioned during today's meeting, here are the kernel boot parameter= s which I found to provide the basis for good performance results: >=20 > processor.max_cstate=3D0 > intel_idle.max_cstate=3D0 >=20 > 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 >=20 > At the BIOS level, we > - turn off Hyperthraeding > - turn off Turbo mode (in order ot not leave the specifications) > - turn on frequency floor override >=20 > We also assert that > /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor > is set to "performance" >=20 > Using above we see a constant frequency at the maximum level allowed by= the CPU (except Turbo mode). >=20 >=20 > Best Regards >=20 > Andreas Bluemle >=20 >=20 >=20 >=20 >=20 >=20 > On Wed, 8 Oct 2014 02:51:21 +0200 > Mark Nelson wrote: >=20 >> 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 >> >> >=20 >=20 >=20 > -- > 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 >=20 > Company details: http://www.itxperts.de/imprint.htm > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info = at http://vger.kernel.org/majordomo-info.html >=20 > ________________________________ >=20 > 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 here= by notified that you have received this message in error and that any rev= iew, dissemination, distribution, or copying of this message is strictly = prohibited. If you have received this communication in error, please noti= fy the sender by telephone or e-mail (as shown above) immediately and des= troy any and all copies of this message in your possession (whether hard = copies or electronically stored copies). >=20 > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >=20 --=20 Lo=EFc Dachary, Artisan Logiciel Libre --uw300Ai1d3ok7jsA3va3jdKHBPGTDjlDe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlQ1eyUACgkQ8dLMyEl6F21oCwCgt4LtANe8gvS2HRW8N9dTxlwI 5LgAn1zPZMBiukgMPBlw7xAIHPgfFCet =abBY -----END PGP SIGNATURE----- --uw300Ai1d3ok7jsA3va3jdKHBPGTDjlDe--