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From: Marcel Bocu <marcel.p.bocu@gmail.com>
To: "Woods, Brian" <Brian.Woods@amd.com>, Guenter Roeck <linux@roeck-us.net>
Cc: Borislav Petkov <bp@alien8.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	"x86@kernel.org" <x86@kernel.org>,
	Clemens Ladisch <clemens@ladisch.de>,
	Jean Delvare <jdelvare@suse.com>,
	"linux-hwmon@vger.kernel.org" <linux-hwmon@vger.kernel.org>,
	Vicki Pfau <vi@endrift.com>
Subject: Re: [PATCH 1/2] x86/amd_nb: Add PCI device IDs for family 17h, model 71h
Date: Mon, 22 Jul 2019 21:04:07 +0300
Message-ID: <5be62ebf-0930-3ea5-6e0c-936e21450725@gmail.com> (raw)
In-Reply-To: <20190722173928.GA16597@amd.com>

On 22/07/2019 20:39, Woods, Brian wrote:
> On Mon, Jul 22, 2019 at 09:51:05AM -0700, Guenter Roeck wrote:
>>
>> With 3900X, and the series applied, I get:
>>
>> k10temp-pci-00c3
>> Adapter: PCI adapter
>> Tdie:         +45.1°C  (high = +70.0°C)
>> Tctl:         +45.1°C  
>>
>> which looks about right.
>>
>> Interesting, though. I thought there are two CPU dies on this chip.
>> I guess the temperature sensor is on the IO block ? If so, are there
>> additional sensors on the CPU dies ?
>>
>> Guenter
>>
> 
> That's good to know.  Thanks for testing it.
> 
> What happens is the IOD takes the max temperature of the chiplets in the
> package and presents that as the temperature of the package.  It works
> the same way as it does in Rome (server parts).  For better or worse,
> you just get the max temperature of the chiplets rather than the
> temperatures of the individual chiplets.
> 

Out of curiosity, is it the maximum temperature of all chiplets, or just
the non-powergated ones? Because this might explain why I get so much
variance in the idle temperature (40 <-> 50°C in a matter of a second
with a mostly-idle processor). This variance is visible on linux, but
not at all on the firmware's configuration interface.

One other option would be the stock fan not being tight-enough... but
apparently quite a few people have the issue. I'll try tightening it!

Marcel

  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-18 18:26 Marcel Bocu
2019-07-18 18:26 ` [PATCH 2/2] hwmon/k10temp: Add support for AMD family 17h, model 71h CPUs Marcel Bocu
2019-07-22 17:46   ` [PATCH v2 2/2] hwmon/k10temp: Add support for AMD family 17h, model 70h CPUs Marcel Bocu
2019-07-22 18:23     ` Guenter Roeck
2019-07-22 21:12       ` Marcel Bocu
     [not found] ` <20190718193330.GA23809@roeck-us.net>
2019-07-19  7:40   ` [PATCH 1/2] x86/amd_nb: Add PCI device IDs for family 17h, model 71h Marcel Bocu
2019-07-19 13:27     ` Guenter Roeck
2019-07-19 15:30       ` Marcel Bocu
2019-07-19 16:08         ` Guenter Roeck
2019-07-22  8:59           ` Thomas Gleixner
2019-07-22  9:12             ` Borislav Petkov
2019-07-22 16:04               ` Woods, Brian
2019-07-22 16:51                 ` Guenter Roeck
2019-07-22 17:39                   ` Woods, Brian
2019-07-22 18:04                     ` Marcel Bocu [this message]
2019-07-22 18:11                       ` Vicki Pfau
2019-07-22 21:09                         ` Marcel Bocu
2019-07-22 22:01                           ` Guenter Roeck
2019-07-22 17:45 ` [PATCH v2 1/2] x86/amd_nb: Add PCI device IDs for family 17h, model 70h Marcel Bocu

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