PMC_SET(3) BSD Library Functions Manual PMC_SET(3)NAMEpmc_set — set the reload count of a sampling PMC
Performance Counters Library (libpmc, -lpmc)
pmc_set(pmc_id_t pmc, pmc_value_t value);
Function pmc_set() is used to set the reload value of sampling PMCs.
Argument pmc specified the handle a previously allocate sampling mode
PMC. Argument value specifies the reload count.
Sampling PMCs will interrupt the CPU after the number of hardware events
specified by the reload count are seen. After the sampling interrupt is
processed the underlying hardware will be reloaded with the specified
count and the hardware automatically restarted by hwpmc(4).
Function pmc_set() should be called on PMC in a quiescent state.
The pmc_set() function returns the value 0 if successful; otherwise the
value -1 is returned and the global variable errno is set to indicate the
A call to pmc_set() may fail with the following errors:
[EINVAL] The current process did not own a PMC with the speci‐
[EBUSY] The specified PMC was already running.
SEE ALSOpmc(3), hwpmc(4)BSD November 25, 2007 BSD