PSU Energy - AC - MCP (MCP39F511N)

What it does #

This metric provider uses the MCP39F511N chip to read the power used by a device plugged into it. Normally this would be the device we are benchmarking.

We use the board implementation here: AMD00706

Spec highlights:

• 0,5% Accuracy on active power measurements in a 1:4000 dynamic range (~ 3.75 mW minimum resolution)
• 8 MHz internal processing clock (theoretical maximum of 12.5 us resolution)
• Internal accumulation of energy in register (currently not active in our setup. We use active power only atm.)

Implementation of the source code is mostly copied from https://github.com/osmhpi/pinpoint/blob/master/src/data_sources/mcp_com.c Credits to Sven Köhler and the OSM group from the HPI

Install #

All compilations and linking will be done through the install script.

After that just plug it into your USB and please use Channel 1.

Classname #

• PsuEnergyAcMcpMachineProvider

Metric Name #

• psu_energy_ac_mcp_machine

Input Parameters #

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

./metric-provider-binary -i 100

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

Where:

• TIMESTAMP: Unix timestamp, in microseconds
• READING: The value taken from sensor in the unit supplied or mW if no unit is specified.

Any errors are printed to stderr.