LM Sensors - temp - fanspeed

What it does

This metric provider uses the lm_sensors package to read a multitude of values from the computer. Mostly temperatures from various hardware components and fan speeds.

Install

You will need sudo apt install libsensors-dev installed on a Debian based distro. Further you will need to run the detect program first sudo sensors-detect which looks at all the chips in your computer and creates the config file.

Classname

  • LmSensorsFanProvider
  • LmSensorsTempProvider

these both extend the LmSensorsProvider which makes it very easy to add new specific providers. We need to separate fan and temperature because they both come in different units. Temp in °C or °F and fan speeds in RPM.

Input Parameters

To make the tool as useful as possible it takes multiple filter parameters:

  • -c: this is a list of strings defining the chips that should be queried. When looking at the output of sensors you can see the the chip being described like coretemp-isa-0000. You can filter for all coretemp chips by just supplying -c coretemp this will match coretemp*

  • -f: the features to output. These will need to be part of a chip. This can also be a list and will match the beginning. -f fan will match fan0 and fan1

Please remember that the metric provider can only understand one type of unit. So please don’t mix fan with temperature when configuring.

The tool also accepts more general parameters:

  • -i: interval in milliseconds. By default the measurement interval is 100 ms.

  • -s: it is possible to pass in a lm_sensors config file if you don’t want to use the system one.

  • -t: this will output in degrees fahrenheit. This is not recommended when using it in the green coding context!

  • -h: displays a little help message.

> ./metric-provider-binary -c coretemp-isa-0000 -f "Package id 0" -i 100

Calling the metric-provider without any parameters will output all the values the package can read. This is for debugging!

Output

This metric provider prints to stdout a continuous stream of data every interval milliseconds till it is stopped with sigkill or sigint (Ctrl-c). The format of the data is as follows:

TIMESTAMP READING FEATURE-NAME

Where:

  • TIMESTAMP: Unix timestamp, in microseconds
  • READING: The value taken from sensors.
  • FEATURE-NAME: Which feature the reading comes from

Please note that if we are looking at temperatures, which come as floats, we multiply the value with 100 to work with integers. So a temperature of 64,87°C will be outputted as 6487.

Any errors are printed to stderr.

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