From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rik van Riel Subject: Re: PROBLEM: Cpufreq constantly keeps frequency at maximum on 4.5-rc4 Date: Tue, 01 Mar 2016 14:22:55 -0500 Message-ID: <1456860175.25322.59.camel@redhat.com> References: <87egc7ahqn.fsf@iki.fi> <000401d16bfc$21338450$639a8cf0$@net> <87a8mv9ujm.fsf@iki.fi> <36DF59CE26D8EE47B0655C516E9CE640286C6253@shsmsx102.ccr.corp.intel.com> <87egc6zc2q.fsf@iki.fi> <36DF59CE26D8EE47B0655C516E9CE640286C6319@shsmsx102.ccr.corp.intel.com> <56CA17D4.8080802@linux.intel.com> <87lh6du7lu.fsf@iki.fi> <20160222061637.GF28226@vireshk-i7> <871t84vgvq.fsf@iki.fi> <20160222164114.GU28226@vireshk-i7> <87egbwn8lp.fsf@iki.fi> <20160229201946.0bdcc48e@annuminas.surriel.com> <87twkqllst.fsf@kirika.int.wmdata.fi> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-p4nfIFGTQ16lfTEs7FjS" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:36269 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751535AbcCATW6 (ORCPT ); Tue, 1 Mar 2016 14:22:58 -0500 In-Reply-To: <87twkqllst.fsf@kirika.int.wmdata.fi> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Arto Jantunen Cc: "linux-pm@vger.kernel.org" --=-p4nfIFGTQ16lfTEs7FjS Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2016-03-01 at 09:06 +0200, Arto Jantunen wrote: > Rik van Riel writes: >=C2=A0 > > What exactly is the problem you are seeing, and on what CPUs? >=20 > Quoting from the first mail in this thread: >=20 > When using kernel 4.5-rc4 my Skylake machine runs very warm since all > cpu cores are always kept at 3.10Ghz (with maximum without turboboost > being 2.6Ghz), completely regardless of load. Swapping between the > governors (performance and powersave) doesn't change the result in > any > way, frequency remains at a constant 3.10Ghz. > > What does the cpufreq table for that CPU look like? > >=20 > > Does HLT (or its equivalent) have a really, really high > > exit or residency latency? >=20 > I don't know the answer to either of these questions. How do I find > out? Could you run this? #!/bin/sh for i in `seq 0 10`; do if [ -d /sys/devices/system/cpu/cpu0/cpuidle/state$i ]; then echo -n "state $i latency: " cat /sys/devices/system/cpu/cpu0/cpuidle/state$i/latency fi done --=20 All Rights Reversed. --=-p4nfIFGTQ16lfTEs7FjS Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJW1ewPAAoJEM553pKExN6D7eMIALBpY6EMHtlGGmqGQ1SFMrYb RGt1Emz+y89jg870xf0Xhs5IY2udPOs3QFoH4U2Y2UDqWfqVW+DUDh3L/hFG4vEf CWpXM+Jee8d14tE3nBkj6stbGDxwSvNSh0KUef7PS64NlNxjz+f/bTtoS/WZGb8Y +zWyeTpgF0VSobkN8knjXoWLRMjiilpN8yc3OUiuGbmRy0ZHTdNdI1knZ1sKmD28 D1Op0lXF+RmVESfY/5kTVlNigqMd8I05XtbQufGUHNbmAuKIUkMsEHiK0NoU7Bjj MCOIlr1A9Cneqn6ff9y0CN/I+URpBjwnHPbjsQ5q3geHa6rWToQ1W9LCFJTcQiE= =xXYq -----END PGP SIGNATURE----- --=-p4nfIFGTQ16lfTEs7FjS--