pmc.c

A simple example about using Intel performance counter (PMC) in C.

Usage: sudo ./pmc [enum1] [umask1] [enum2] [umask2]

Note:

• 2 PMCs are tested each time.
• To set the environment, root privilege is required.
• Example below is based on a Kaby Lake machine with iso-ed core 3. Change accordingly if other msr and cores are in use.

Example:

1. enable msr
   sudo ./enable-msr.sh
2. build
   make
3. run
   sudo ./pmc 0xe 0x1 0xa1 0x80
4. output:
   [result] [pmc1 pmc2] = [96 5]

Details of PMC configurations such as events, event numbers and umasks can be found from the Intel manuals: https://software.intel.com/content/www/us/en/develop/articles/intel-sdm.html

Submit an issue if any questions.