Date: Mon, 31 Jul 2017 14:15:13 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-stable@freebsd.org Subject: Re: issues with powerd/freq_levels Message-ID: <7c484581-32d9-ff59-2fc9-f1dd555c0eb7@denninger.net> In-Reply-To: <CAN6yY1t5xYXMig0PSGn=Gdr=fOZJUBUYEGtXYxxJ9Q7R=z_kWw@mail.gmail.com> References: <8AEC9DBC-BADD-4FB2-8358-DA43F7EF5E68@cs.huji.ac.il> <20170731201323.A6737@sola.nimnet.asn.au> <CAN6yY1t5xYXMig0PSGn=Gdr=fOZJUBUYEGtXYxxJ9Q7R=z_kWw@mail.gmail.com>
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[-- Attachment #1 --] On 7/31/2017 14:03, Kevin Oberman wrote: > On Mon, Jul 31, 2017 at 3:48 AM, Ian Smith <smithi@nimnet.asn.au> wrote: > >> 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. >> > Very odd. Are all systems running identical CPUs and BIOSes? Identical > loader and sysctl configurations? Look at /var/rn/dmesg.boot for CPU > information. Is EST being detected? It used to be early in the boot > process, but is now fairly late. (In my case, about 2/3 through the > dmesg.boot file. > > I have p4tcc and throttling explicitly turned off (which should now be the > default), but my Sandy Bridge Core i5 still shows: > dev.cpu.0.freq_levels: 2501/35000 2500/35000 2000/26426 1800/23233 > 1600/20164 1400/17226 1200/14408 1000/11713 800/9140 > The first is really bogus to indicate "turbo" mode. > > Temperature is a totally separate issue. It is VERY sensitive to external > issue like airflow and position of the CPU in relation to other components > in the chassis Also, unless you have a lot of cores, you probably should > set both economy_cx_lowest and performance_cx_lowest to Cmax. Economy > should default to that, but performance will not as that can cause issues > on systems with large numbers of cores, so is set to C2. Many such system > used to disable deeper sleep modes in BIOS, but I am way behind the times > and don't know about the current state of affairs. Certainly for systems > with 32 or fewer cores, this should not be an issue. In any case, Cx state > can sharply impact temperature. > > Finally, the last case with power levels of -1 for all frequencies is > probably because the CPU manufacturer (Intel?) has not published this > information. For a while they were treating this as "proprietary" > information. Very annoying! It's always something that is not readily > available. Thi is one reason I suspect your CPUs are not identical. > -- > Kevin Oberman, Part time kid herder and retired Network Engineer > E-mail: rkoberman@gmail.com > PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" I have a very new PCEngines unit here running 11.0-STABLE and this is what I have in the related sysctls: $ sysctl -a|grep cpu.0 dev.cpu.0.cx_method: C1/hlt C2/io dev.cpu.0.cx_usage_counters: 2261969965 3038 dev.cpu.0.cx_usage: 99.99% 0.00% last 798us dev.cpu.0.cx_lowest: C2 dev.cpu.0.cx_supported: C1/1/0 C2/2/400 dev.cpu.0.freq_levels: 1000/924 800/760 600/571 dev.cpu.0.freq: 1000 dev.cpu.0.temperature: 59.2C dev.cpu.0.%parent: acpi0 dev.cpu.0.%pnpinfo: _HID=none _UID=0 dev.cpu.0.%location: handle=\_PR_.P000 dev.cpu.0.%driver: cpu dev.cpu.0.%desc: ACPI CPU .... $ sysctl -a|grep cx hw.acpi.cpu.cx_lowest: C2 dev.cpu.3.cx_method: C1/hlt dev.cpu.3.cx_usage_counters: 111298364 dev.cpu.3.cx_usage: 100.00% last 30us dev.cpu.3.cx_lowest: C2 dev.cpu.3.cx_supported: C1/1/0 dev.cpu.2.cx_method: C1/hlt dev.cpu.2.cx_usage_counters: 127978480 dev.cpu.2.cx_usage: 100.00% last 35us dev.cpu.2.cx_lowest: C2 dev.cpu.2.cx_supported: C1/1/0 dev.cpu.1.cx_method: C1/hlt dev.cpu.1.cx_usage_counters: 108161434 dev.cpu.1.cx_usage: 100.00% last 29us dev.cpu.1.cx_lowest: C2 dev.cpu.1.cx_supported: C1/1/0 dev.cpu.0.cx_method: C1/hlt C2/io dev.cpu.0.cx_usage_counters: 2261916773 3038 dev.cpu.0.cx_usage: 99.99% 0.00% last 378us dev.cpu.0.cx_lowest: C2 dev.cpu.0.cx_supported: C1/1/0 C2/2/400 These are fanless, 4-core devices that are pretty cool -- they've got AES instructions in them and thus make very nice VPN gateways running something like Strongswan, and come with either 2 or 3 gigabit interfaces on the board. Oh, and they run on 12V. Powerd is logging this, however... hwpstate0: set freq failed, err 6 hwpstate0: set freq failed, err 6 Hmmmm.... -- Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ [-- Attachment #2 --] 0 *H 010 `He 0 *H \0X0@=0 *H 01 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA0 161218194535Z 211217194535Z0W1 0 UUS10UFlorida10U Cuda Systems LLC10Ukarl@denninger.net0"0 *H 0 ͍fd`1ie6";fSz`5¹/?{=Ӵowj ħ_fnӴMG\ҢҖ4ib}>@mJo&m M; Q9U cj] p퐆W.2E= ^¢tzĄ'5i7_ `~#dY `]R]N%R}EXzqV@[oN T>5AwYˡA "\v&YG]+($p:M,T?=mJkMљg*ym L! 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