GetPressure takes the path of a *.pressure file and returns a map of the pressure (IO contension) stats for the cgroup on CPU controllers, the only key will be "some" on IO controllers, the keys will be "some" and "full" See https://github.com/torvalds/linux/blob/master/Documentation/accounting/psi.rst.

ParseCgroupParamKeyValue parses a cgroup param and returns the key name and value.

ParseUint reads a single uint value.

ParseUintFromFile reads a single uint value from a file.

ErrInvalidFormat indicates a malformed key/value pair on a line.

CPUUsage wraps the CPU usage time values for the CPU controller metrics.

Pressure contains load metrics for a controller, Broken apart into 10, 60, and 300 second samples, as well as a total time in US.