linux-kernel - Re: [RFT PATCH 0/4] hwmon: k10temp driver improvements

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Date:   Fri, 17 Jan 2020 20:15:17 +0100
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     linux-hwmon@...r.kernel.org, Clemens Ladisch <clemens@...isch.de>,
        Jean Delvare <jdelvare@...e.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFT PATCH 0/4] hwmon: k10temp driver improvements

Hi,

On Thu, Jan 16, 2020 at 06:17:56AM -0800, Guenter Roeck wrote:
> This patch series implements various improvements for the k10temp driver.
> 
> Patch 1/4 introduces the use of bit operations.
> 
> Patch 2/4 converts the driver to use the devm_hwmon_device_register_with_info
> API. This not only simplifies the code and reduces its size, it also
> makes the code easier to maintain and enhance. 
> 
> Patch 3/4 adds support for reporting Core Complex Die (CCD) temperatures
> on Ryzen 3 (Zen2) CPUs.
> 
> Patch 4/4 adds support for reporting core and SoC current and voltage
> information on Ryzen CPUs.
> 
> With all patches in place, output on Ryzen 3900 CPUs looks as follows
> (with the system under load).
> 
> k10temp-pci-00c3
> Adapter: PCI adapter
> Vcore:        +1.36 V
> Vsoc:         +1.18 V
> Tdie:         +86.8°C  (high = +70.0°C)
> Tctl:         +86.8°C
> Tccd1:        +80.0°C
> Tccd2:        +81.8°C
> Icore:       +44.14 A
> Isoc:        +13.83 A
> 
> The patch series has only been tested with Ryzen 3900 CPUs. Further test
> coverage will be necessary before the changes can be applied to the Linux
> kernel.

Looks ok on 3800X (idle):

$ lscpu | grep "Model name"
Model name:                      AMD Ryzen 7 3800X 8-Core Processor
$ sensors "k10temp-*"
k10temp-pci-00c3
Adapter: PCI adapter
Vcore:       937.00 mV 
Vsoc:          1.01 V  
Tdie:         +35.2°C  (high = +70.0°C)
Tctl:         +35.2°C  
Tccd1:        +35.8°C  
Icore:         4.61 A  
Isoc:          6.18 A  

And after compiling the kernel with 32 threads for 1 minute:

$ sensors "k10temp-*" 
k10temp-pci-00c3
Adapter: PCI adapter
Vcore:         1.29 V  
Vsoc:          1.01 V  
Tdie:         +77.1°C  (high = +70.0°C)
Tctl:         +77.1°C  
Tccd1:        +78.8°C  
Icore:        39.53 A  
Isoc:          6.18 A  

Board Information during the idle check:

$ sudo dmidecode -s system-manufacturer
Gigabyte Technology Co., Ltd.
$ sudo dmidecode -s system-product-name
X570 AORUS ULTRA
$ sensors "it8792-*"
it8792-isa-0a60
Adapter: ISA adapter
in0:           1.79 V  (min =  +0.00 V, max =  +2.78 V)
in1:         589.00 mV (min =  +0.00 V, max =  +2.78 V)
in2:         981.00 mV (min =  +0.00 V, max =  +2.78 V)
+3.3V:         1.68 V  (min =  +0.00 V, max =  +2.78 V)
in4:           1.79 V  (min =  +0.00 V, max =  +2.78 V)
in5:           1.18 V  (min =  +0.00 V, max =  +2.78 V)
in6:           2.78 V  (min =  +0.00 V, max =  +2.78 V)  ALARM
3VSB:          1.68 V  (min =  +0.00 V, max =  +2.78 V)
Vbat:          1.61 V  
fan1:           0 RPM  (min =    0 RPM)
fan2:           0 RPM  (min =    0 RPM)
fan3:           0 RPM  (min =    0 RPM)
temp1:        +37.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp3:        +36.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
intrusion0:  ALARM

-- Sebastian

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