Message-Id: <201308150924.49518@pali>
Date:	Thu, 15 Aug 2013 09:24:48 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Martin Peres <martin.peres@...ri.fr>
Cc:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Ben Skeggs <bskeggs@...hat.com>
Subject: Re: nouveau: temperature on nv40 is unavailable since ad40d73ef533ab0ad16b4a1ab2f7870c1f8ab954

On Thursday 15 August 2013 04:07:24 Martin Peres wrote:
> On 14/08/2013 05:02, Pali Rohár wrote:
> > On Tuesday 13 August 2013 15:55:28 Martin Peres wrote:
> >> On 13/08/2013 09:53, Pali Rohár wrote:
> >>> On utorok, 13. augusta 2013 15:32:45 CEST, Martin Peres
> > 
> > wrote:
> >>>> On 13/08/2013 09:23, Pali Rohár wrote:
> >>>>> On Tuesday 13 August 2013 09:01:19 Martin Peres wrote:
> >>>>   ...
> >>>> 
> >>>> You can check the temperature by running nvidia-settings.
> >>>> If you can't see the temperature in it, then nvidia
> >>>> doesn't support it on your card and
> >>>> I'm not sure we should :s
> >>>> 
> >>>> Thanks for the vbios you sent me in private. For the
> >>>> others, the reason why he doesn't have temperature
> >>>> anymore is because his vbios lacks sensor calibration
> >>>> values.
> >>> 
> >>> In nvidia-settings tab "GPU 0 - (GeForce 6600 GT)" -->
> >>> "Thermal Settings" is:
> >>> 
> >>> Thermal Sensor Information:
> >>> ID: 0
> >>> Target: GPU
> >>> Provider: GPU Internal
> >>> Temperature: 70 C (now)
> >>> 
> >>> I looked in Windows program SpeedFan. It found Nvidia PCI
> >>> card and reported "GPU Temp" about 68-70 C. So it looks
> >>> like both nvidia driver and windows SpeedFan program
> >>> reading same values.
> >> 
> >> Great, I'll cook you a patch in a bit and you'll see what
> >> the temperature is like. It won't be perfectly accurate
> >> but there is some kind of default for nvidia cards of this
> >> generation.
> > 
> > Ok, send me patch and I can try it if it will work and
> > report similar values as windows or nvidia driver.
> 
> Sorry for the late answer.
> 
> Please test this patch. Be aware that temperature with nouveau
> will be higher than with the blob.
> I only want to see if nouveau reports a temperature.
> 
> The only way to be sure if the values are good-enough would be
> to use the blob and run:
> nvapeek 0x15b0
> Please send me the result along with the temperature reported
> by nvidia at the time of the peek.
> 
> Martin
> 
> PS: This patch has only be compile-tested, I don't have access
> to an nv4x right now.

Hello,

now after patch nouveau report temperature:

$ sensors
...
nouveau-pci-0500
Adapter: PCI adapter
temp1:        +63.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +145.0°C, hyst =  +2.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)
...

I found that nvidia binary driver has command line utility 
nvidia-smi which report same temperature as X utility nvidia-
settings. So I will use nvidia-smi (if it is OK).

And after reboot nvidia report another temperature value:

$ nvidia-smi -q -d TEMPERATURE
...
GPU 0000:05:00.0
    Temperature
        Gpu                     : 70 C

Immediately I called nvapeek command:

$ nvapeek 0x15b0
000015b0: 1000008e

So value reported by nouveau is lower than value reported by 
nvidia binary driver.

I wait some some and started nvidia-smi and nvapeek again, here 
are results:

$ nvidia-smi -q -d TEMPERATURE
...
GPU 0000:05:00.0
    Temperature
        Gpu                     : 67 C

$ nvapeek 0x15b0
000015b0: 1000008e

So it looks like that nvapeek returning always same value and 
does not depends on temperature... It is OK?

-- 
Pali Rohár
pali.rohar@...il.com

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