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Date:      Thu, 24 Dec 2009 18:48:10 +0100
From:      Bernd Walter <ticso@cicely7.cicely.de>
To:        Kevin Oberman <oberman@es.net>
Cc:        Gleb Kurtsou <gleb.kurtsou@gmail.com>, Doug Barton <dougb@freebsd.org>, ticso@cicely.de, freebsd-current@freebsd.org, "b. f." <bf1783@googlemail.com>
Subject:   Re: powerd and nvidia drivers not playing nicely together (Was: Re: Systems running hot?)
Message-ID:  <20091224174809.GZ2260@cicely7.cicely.de>
In-Reply-To: <20091224162412.BA73A1CC0B@ptavv.es.net>
References:  <20091224104625.GY2260@cicely7.cicely.de> <20091224162412.BA73A1CC0B@ptavv.es.net>

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On Thu, Dec 24, 2009 at 08:24:12AM -0800, Kevin Oberman wrote:
> > Date: Thu, 24 Dec 2009 11:46:26 +0100
> > From: Bernd Walter <ticso@cicely7.cicely.de>
> > Sender: owner-freebsd-current@freebsd.org
> > 
> > On Wed, Dec 23, 2009 at 04:44:35PM +0200, Gleb Kurtsou wrote:
> > > On (21/12/2009 19:18), Doug Barton wrote:
> > > > b. f. wrote:
> > > > > On 12/21/09, Doug Barton <dougb@freebsd.org> wrote:
> > > > >> b. f. wrote:
> > > > >>>> no X! So I think to myself, what else did I change last night.... oh
> > > > > 
> > > > >>> acpi_perf? acpi_throttle? acpi_thermal? acpi_video?
> > > > >> I haven't done anything special with the acpi stuff. The only thing
> > > > >> that looks relevant from dmesg is: acpi_tz0: <Thermal Zone> on acpi0
> > > > >>
> > > > > 
> > > > > Yes, but which components show up in 'sysctl -a | grep -ie acpi' ?
> > > > 
> > > > It's a long list, but here you go:
> > > > http://people.freebsd.org/~dougb/acpi-grep.txt
> > > > 
> > > > >>> Which nvidia driver?
> > > > >> The latest.
> > > > > 
> > > > > Which video card?
> > > > 
> > > > nvidia0: <GeForce Go 7300>
> > > I had similar problems with GeForce 8400M. GPU temperature could get up
> > > to 100C in X, which increased CPU temperature in its turn.  I use
> > > powerd, and had lockups with *_cx_lowest settings. I run amd64, i386 was
> > > just fine on the same notebook. 
> > 
> > It is not just nvidia.
> > I'm using two plain old PCI Matrox G400 and whenever I start X with
> > powerd enabled I have a full freeze within 24 hours.
> > It doesn't seem to be a problem to start powerd once X is runnning.
> > Maybe it is something like tuning some delay loop with reduced clock
> > rate, which then isn't long enough with increased speed.
> 
> Quick question...are you using throttling/TCC? If so, either turn it off
> or limit how low it can run the CPU. When I was running throttling on
> systems with old Matrox and Radeon cards, they would freeze if the
> throttling went too low.

I asume yes - not sure about all those modern fancy names.
In other words dev.cpu.?.freq changes.

> As mav pointed out at http://wiki.freebsd.org/TuningPowerConsumption,
> TCC does little to conserve power and was not designed for that. TCC is
> Thermal Control Circuit and is designed to keep the CPU form
> over-temping. It works for this, but not power management. I'd love to
> see it off (for power management) by default.
> hint.p4tcc.0.disabled=1
> hint.acpi_throttle.0.disabled=1

What is the difference between the hints and disabling powerd?

My system is a C2 quad on an Intel board running i386/PAE.
Only C1 is supported, which - to my knowledge - doesn't require powerd
and should be active by default.

[20]cicely7# sysctl dev.cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.temperature: 60
dev.cpu.0.freq: 2394
dev.cpu.0.freq_levels: 2394/89000 2094/77875 1795/66750 1496/55625 1197/44500 897/33375 598/22250 299/11125
dev.cpu.0.cx_supported: C1/1
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00%
dev.cpu.1.%desc: ACPI CPU
dev.cpu.1.%driver: cpu
dev.cpu.1.%location: handle=\_PR_.CPU1
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%parent: acpi0
dev.cpu.1.temperature: 59
dev.cpu.1.cx_supported: C1/1
dev.cpu.1.cx_lowest: C1
dev.cpu.1.cx_usage: 100.00%
dev.cpu.2.%desc: ACPI CPU
dev.cpu.2.%driver: cpu
dev.cpu.2.%location: handle=\_PR_.CPU2
dev.cpu.2.%pnpinfo: _HID=none _UID=0
dev.cpu.2.%parent: acpi0
dev.cpu.2.temperature: 54
dev.cpu.2.cx_supported: C1/1
dev.cpu.2.cx_lowest: C1
dev.cpu.2.cx_usage: 100.00%
dev.cpu.3.%desc: ACPI CPU
dev.cpu.3.%driver: cpu
dev.cpu.3.%location: handle=\_PR_.CPU3
dev.cpu.3.%pnpinfo: _HID=none _UID=0
dev.cpu.3.%parent: acpi0
dev.cpu.3.temperature: 52
dev.cpu.3.cx_supported: C1/1
dev.cpu.3.cx_lowest: C1
dev.cpu.3.cx_usage: 100.00%

-- 
B.Walter <bernd@bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.



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