NAME

       PAPI_set_granularity - Set the default counting granularity for eventsets bound to the cpu
       component.

SYNOPSIS

Detailed Description

       C Prototype:
           #include <papi.h>
            int PAPI_set_granularity( int granularity );

       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

       Return values
           PAPI_OK
           PAPI_EINVAL One or more of the arguments is invalid.

       PAPI_set_granularity sets the default counting granularity for all new event sets created
       by PAPI_create_eventset. This call implicitly sets the granularity for the cpu component
       (component 0) and is included to preserve backward compatibility.
       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_granularity(PAPI_GRN_PROC);
           if (ret != PAPI_OK) handle_error(ret);
           ret = PAPI_create_eventset(&EventSet);
           if (ret != PAPI_OK) handle_error(ret);

       See also
           PAPI_set_cmp_granularity PAPI_set_domain PAPI_set_opt PAPI_get_opt

Author

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