PPSM functions

The PPSM library (libppsm.a) includes the functions described below.

You normally call these functions in the following order:

1. Call ppsm_init() to initialize and allocate resources used by the PPSM library, and create CPU load-accounting threads for each CPU.
2. Call any other APIs as required.
3. Call ppsm_fini() to stop the CPU accounting threads and release resources used by the PPSM library.