pmc_rapl_initialize
error = pmc_rapl_initialize(pmc_mdep, ncpus, pmc_mdep->pmd_nclass - 1);
pmc_rapl_initialize(pmc_mdep, ncpus, pmc_mdep->pmd_nclass - 1) != 0)
int pmc_rapl_initialize(struct pmc_mdep *_md, int _maxcpu, int _classindex);