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Date:      Fri, 08 Jun 2012 02:29:20 +0200
From:      Momchil Ivanov <momchil@xaxo.eu>
To:        Martin Sugioarto <martin@sugioarto.com>
Cc:        freebsd-stable@freebsd.org, =?UTF-8?B?0JzQvtC80YfQuNC7INCY0LLQsNC90L7Qsg==?= <momchil@xaxo.eu>
Subject:   Re: ULE Scheduler
Message-ID:  <86r4tq7ijj.wl%momchil@xaxo.eu>
In-Reply-To: <20120608005415.070cd4a9@zelda.sugioarto.com>
References:  <86fwa8szos.wl%momchil@xaxo.eu> <20120608005415.070cd4a9@zelda.sugioarto.com>

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At Fri, 8 Jun 2012 00:54:15 +0200,
Martin Sugioarto wrote:
> 
> [1  <text/plain; UTF-8 (quoted-printable)>]
> Am Thu, 07 Jun 2012 03:01:07 +0200
> schrieb Момчил Иванов <momchil@xaxo.eu>:
> 
> > Is there some remedy?
> 
> Hi,
> 
> I remember this series, I've had a T60p and when I compiled world, I
> placed a fan in front of it to cool it down from 100°C. The difference
> with T60p was that it simply shut off reaching 101°C.
> 
> The problem is the hardware, not FreeBSD. T60p and obviously T60, too,
> was made by some crazy people who had the idea to cool the CPU und the
> GPU under the same heat sink. The funny thing is that the GPU is
> running at 70°C all the time, because FreeBSD does not implement
> voltage regulation for the VGA chipset. The result is that the GPU
> warms up the CPU to at least 55°C while idle.
> 
> If you want to have a cooler CPU implement power saving for the Radeon
> chipset there.
> 
> Martin
> [2 signature.asc <application/pgp-signature (7bit)>]
> 
Hi,

well, that is not true, I have been using the laptop since more than 4
years without any problems. The thing is that yesterday I had it
docked and that seems to raise the idle temperature by about 10°C, so
I get docked somewhere about 42°C when doing nothing computationally
intensive:

hw.acpi.thermal.tz0.temperature: 50.0C
hw.acpi.thermal.tz1.temperature: 42.0C
dev.cpu.0.temperature: 42.0C
dev.cpu.1.temperature: 42.0C

So I probably have to shift things around to give the dock a bit more
room. However, the dust, the thermal liquid and the screws seem to
have contributed to the temperature increase too. The GPU (Nvidia
Quadro NVS 140M) might be an issue, nvidia-settings says 58°C (I am
not running any fancy graphics) and I've seen it getting over
100-120°C before, when I am doing some opengl stuff. With the latter I
mean, that I know how to intentionally kill it.

Anyway, I have solved my problem and that seems to not be related to
ULE at all. However, it was still surprising for me to find out how
ULE schedules computationally intensive tasks.

Regards,
Momchil



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