From owner-freebsd-stable@freebsd.org Mon Jul 31 10:48:54 2017 Return-Path: Delivered-To: freebsd-stable@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 3900ADCFEBB for ; Mon, 31 Jul 2017 10:48:54 +0000 (UTC) (envelope-from smithi@nimnet.asn.au) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 269C1722BA for ; Mon, 31 Jul 2017 10:48:54 +0000 (UTC) (envelope-from smithi@nimnet.asn.au) Received: by mailman.ysv.freebsd.org (Postfix) id 25F4EDCFEBA; Mon, 31 Jul 2017 10:48:54 +0000 (UTC) Delivered-To: stable@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 258F6DCFEB9 for ; Mon, 31 Jul 2017 10:48:54 +0000 (UTC) (envelope-from smithi@nimnet.asn.au) Received: from sola.nimnet.asn.au (paqi.nimnet.asn.au [115.70.110.159]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 8E978722B9 for ; Mon, 31 Jul 2017 10:48:52 +0000 (UTC) (envelope-from smithi@nimnet.asn.au) Received: from localhost (localhost [127.0.0.1]) by sola.nimnet.asn.au (8.14.2/8.14.2) with ESMTP id v6VAmNsJ008967; Mon, 31 Jul 2017 20:48:26 +1000 (EST) (envelope-from smithi@nimnet.asn.au) Date: Mon, 31 Jul 2017 20:48:23 +1000 (EST) From: Ian Smith To: Daniel Braniss cc: stable@freebsd.org Subject: Re: issues with powerd/freq_levels In-Reply-To: <8AEC9DBC-BADD-4FB2-8358-DA43F7EF5E68@cs.huji.ac.il> Message-ID: <20170731201323.A6737@sola.nimnet.asn.au> References: <8AEC9DBC-BADD-4FB2-8358-DA43F7EF5E68@cs.huji.ac.il> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Jul 2017 10:48:54 -0000 On Mon, 31 Jul 2017 10:09:11 +0300, Daniel Braniss wrote: > I am trying out PCengines latest apu2 boards, and I just noticed that with different Freebsd versions I get > different freq_levels, and so when idling, each box (have 5) has a different freq/temperature value, ranging > from 125/69.1C, 600/59.0C to 75/56.0C > > FreeBSD apu-4 11.1-STABLE FreeBSD 11.1-STABLE #5 f565b5a06ab3 (11) tip: Mon Jul 31 09:36:33 IDT 2017 > apu-4# sysctl dev.cpu.0.freq_levels > dev.cpu.0.freq_levels: 1000/980 800/807 600/609 That looks about right. On a Core2Duo (still on 9.3) I get: dev.est.1.freq_settings: 2401/35000 2400/35000 1600/15000 800/12000 dev.est.0.freq_settings: 2401/35000 2400/35000 1600/15000 800/12000 dev.cpu.0.freq_levels: 2401/35000 2400/35000 1600/15000 800/12000 dev.cpu.0.freq: 800 But only because I'd added to /boot/loader.conf: hint.p4tcc.0.disabled=1 hint.acpi_throttle.0.disabled=1 which became the defaults sometime, maybe not before 11.0? Otherwise mine would look more similar to the one below, with all 12.5% increments in frequency enabled, which doesn't actually save any power at all. > FreeBSD apu-5 11.1-PRERELEASE FreeBSD 11.1-PRERELEASE #0 21e9d1ca9b80 (11) tip: Tue May 30 11:51:48 IDT 2017 > apu-5# sysctl dev.cpu.0.freq_levels > dev.cpu.0.freq_levels: 1000/966 875/845 800/795 700/695 600/600 525/525 450/450 375/375 300/300 225/225 150/150 75/75 Looks like either p4tcc or acpi_throttle is enabled? See cpufreq(4). As above, these don't buy you anything but extra busyness for powerd. Also noticed that the (nice, low!) milliwatt figures for 1000/800/600 freqs are a bit different to the -stable one. Slightly Different model? > FreeBSD apu-1 10.3-STABLE FreeBSD 10.3-STABLE #4 267788fd852c (10) tip: Tue Jan 10 09:09:00 IST 2017 > apu-1# sysctl dev.cpu.0.freq_levels > dev.cpu.0.freq_levels: 1000/-1 875/-1 750/-1 625/-1 500/-1 375/-1 250/-1 125/-1 And that looks like est(4) isn't enabled/attaching at all .. see dmesg on all of these for clues. > so, any ideas as to what is going on? Pure guesswork on experience with older versions, I'm not up to date. cheers, Ian