From owner-freebsd-amd64@freebsd.org Tue Sep 8 05:59:07 2015 Return-Path: Delivered-To: freebsd-amd64@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AF1239CC2EC for ; Tue, 8 Sep 2015 05:59:07 +0000 (UTC) (envelope-from jau789@gmail.com) Received: from mail-wi0-x22a.google.com (mail-wi0-x22a.google.com [IPv6:2a00:1450:400c:c05::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 41FFF1AD1 for ; Tue, 8 Sep 2015 05:59:07 +0000 (UTC) (envelope-from jau789@gmail.com) Received: by wiclk2 with SMTP id lk2so102136789wic.1 for ; Mon, 07 Sep 2015 22:59:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=to:from:subject:message-id:date:user-agent:mime-version :content-type:content-transfer-encoding; bh=4+z/qTytv6sbqBiWH2jteaqzBb5yZ0EoCUR0Oyxs+7I=; b=WS8PHIJicLVw8Dxf2TFUN7oTWpa+VU+rOl960D504fC+sAGvRS9pjZv5513RPvcztS DKAiOgMH1EbQ9KP4Y4epK0xsZZH2qydcl4LZl4VXV2aFBpMZ/x3cSldFTE9aosLDayY+ aknuTxmsZ4AkRZzk31wdGLYoJAY+TuYe3FAK9Lm/63x171TYj8u9fw5M1WyJXvYabBJq QQHYWMQza20BDyv5SULAhCxSzs0ONKjx9ezFhXbmk5aZCBiqN0DAKW/LtuaokwI7YLT6 7sIlW0xTyBRBxrbtEKCZnHWEAyLxtGT/rqfyXfX7tg3JbiTvo9ivyihMhvFCme7QvkbA 5ygQ== X-Received: by 10.194.237.232 with SMTP id vf8mr43364906wjc.22.1441691945699; Mon, 07 Sep 2015 22:59:05 -0700 (PDT) Received: from [192.168.1.131] (xdsl-205-163.nblnetworks.fi. [83.145.205.163]) by smtp.googlemail.com with ESMTPSA id pg5sm2865544wjb.21.2015.09.07.22.59.04 for (version=TLSv1/SSLv3 cipher=OTHER); Mon, 07 Sep 2015 22:59:05 -0700 (PDT) To: freebsd-amd64@freebsd.org From: Jukka Ukkonen Subject: Something odd with CPU frequency levels on AMD EE processors X-Enigmail-Draft-Status: N1110 Message-ID: <55EE7928.1000804@gmail.com> Date: Tue, 8 Sep 2015 08:59:04 +0300 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Tue, 08 Sep 2015 10:51:28 +0000 X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Sep 2015 05:59:07 -0000 Hello all, Previously my AMD EE CPUs have been reporting frequency levels all the way down to 100 MHz and powerd also used those quite nicely. Yesterday I noticed the fans running at much higher speed than what has been normal on a mostly idle system. Now "sysctl dev.cpu.0" shows me this... dev.cpu.0.cx_usage: 100.00% last 622us dev.cpu.0.cx_lowest: C8 dev.cpu.0.cx_supported: C1/1/0 dev.cpu.0.freq_levels: 1700/3870 1500/3461 1300/3105 1100/2720 800/2193 dev.cpu.0.freq: 800 dev.cpu.0.temperature: 34.6C dev.cpu.0.%parent: acpi0 dev.cpu.0.%pnpinfo: _HID=none _UID=0 dev.cpu.0.%location: handle=\_PR_.P001 dev.cpu.0.%driver: cpu dev.cpu.0.%desc: ACPI CPU The system no longer sees the lower CPU frequency levels at all. Obviously it will not try using them either. This change must have been quite recent. Otherwise I would have noticed the fans running at unusually high speeds much earlier than yesterday evening. In any case now the idle system consumes much more power than it really needs to producing only heat which is exactly what I had tried to avoid when choosing the EE CPUs. Here is the output from "uname -a" showing the OS version, the SVN version number, and the time of the latest build. FreeBSD sleipnir 10.2-STABLE FreeBSD 10.2-STABLE #0 r287529: Mon Sep 7 09:39:36 EEST 2015 root@sleipnir:/usr/obj/usr/src-10.2/sys/Sleipnir amd64 I hope someone has an idea what has happened. I would really like to enable the lower frequency levels again as soon as possible. --jau