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31 .Nd x86 architecture-specific PMC operations
37 .Fn pmc_get_msr "pmc_id_t pmc" "uint32_t *msr"
41 returns the processor model specific register number associated with
42 a PMC for subsequent use with RDPMC instructions.
45 specifies a process scope counting PMC.
46 The function will write the model specific register number associated
47 with the PMC to the location pointed to by argument
50 After successful completion of this function, applications
51 can directly read the contents of PMC hardware using
58 may fail with the following errors:
61 The PMC handle specified was invalid.
63 The PMC specified did not have process scope or counting mode.
65 The PMC specified was allocated with the
69 The specified PMC is already attached to target processes other
72 The underlying hardware does not support an RDPMC instruction.