CPC Binding to Physical Hardware

The interfaces in this section bind the requests in a set to the physical hardware and set the counters to a starting position.

int cpc_bind_curlwp(cpc_t *cpc, cpc_set_t *set, uint_t flags);
int cpc_bind_pctx(cpc_t *cpc, pctx_t *pctx, id_t id, cpc_set_t *set,
          uint_t flags);
int cpc_bind_cpu(cpc_t *cpc, processorid_t id, cpc_set_t *set, 
          uint_t flags);
int cpc_unbind(cpc_t *cpc, cpc_set_t *set);

The cpc_bind_curlwp() function binds the set to the calling light-weight process (LWP). The counters of the set are virtualized to this LWP and count the events that occur on the CPU while the calling LWP runs. The only flag that is valid for the cpc_bind_curlwp() routine is CPC_BIND_LWP_INHERIT.

The cpc_bind_pctx() function binds the set to a LWP in a process that is captured with libpctx. This function has no valid flags. For more information, see the libpctx(3LIB) man page.

The cpc_bind_cpu() function binds the set to the processor specified in the id parameter. Binding a set to a CPU invalidates existing performance counter contexts on the system. This function has no valid flags.

The cpc_unbind() function stops the performance counters and releases the hardware that is associated with the bound set. If a set is bound to a CPU, the cpc_unbind() function unbinds the LWP from the CPU and releases the CPC pseudo-device.