NAME

       PAPI_set_cmp_granularity - Set the default counting granularity for eventsets bound to the
       specified component.

SYNOPSIS

Detailed Description

       C Prototype:
           #include <papi.h>
            int PAPI_set_cmp_granularity( int granularity, int cidx );

       Parameters
           granularity one of the following constants as defined in the papi.h header file

           • PAPI_GRN_THR Count each individual thread
           • PAPI_GRN_PROC Count each individual process
           • PAPI_GRN_PROCG Count each individual process group
           • PAPI_GRN_SYS Count the current CPU
           • PAPI_GRN_SYS_CPU Count all CPUs individually
           • PAPI_GRN_MIN The finest available granularity
           • PAPI_GRN_MAX The coarsest available granularity
           cidx An integer identifier for a component. By convention, component 0 is always the
           cpu component.

       Return values
           PAPI_OK
           PAPI_EINVAL One or more of the arguments is invalid.
           PAPI_ENOCMP The argument cidx is not a valid component.

       PAPI_set_cmp_granularity sets the default counting granularity for all new event sets, and
       requires an explicit component argument. Event sets that are already in existence are not
       affected.
       To change the granularity of an existing event set, please see PAPI_set_opt. The reader
       should note that the granularity of an event set affects only the mode in which the
       counter continues to run.
       Example:

           int ret;

           // Initialize the library
           ret = PAPI_library_init(PAPI_VER_CURRENT);
           if (ret > 0 && ret != PAPI_VER_CURRENT) {
             fprintf(stderr,"PAPI library version mismatch!\n");
             exit(1);
           }
           if (ret < 0) handle_error(ret);

           // Set the default granularity for the cpu component
           ret = PAPI_set_cmp_granularity(PAPI_GRN_PROC, 0);
           if (ret != PAPI_OK) handle_error(ret);
           ret = PAPI_create_eventset(&EventSet);
           if (ret != PAPI_OK) handle_error(ret);

       See also
           PAPI_set_granularity PAPI_set_domain PAPI_set_opt PAPI_get_opt

Author

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