NAME

       PAPI_num_counters -

       Get the number of hardware counters available on the system.

SYNOPSIS

Detailed Description

       @par C Interface:
       int PAPI_num_counters( void );

       Postcondition:
           Initializes the library to PAPI_HIGH_LEVEL_INITED if necessary.

       Return values:
           PAPI_EINVAL papi.h is different from the version used to compile the PAPI library.
           PAPI_ENOMEM Insufficient memory to complete the operation.
           PAPI_ESYS A system or C library call failed inside PAPI, see the errno variable.

       Examples:

           * int num_hwcntrs;
           * //  The installation does not support PAPI
           * if ((num_hwcntrs = PAPI_num_counters()) < 0 )
           *   handle_error(1);
           * //  The installation supports PAPI, but has no counters
           * if ((num_hwcntrs = PAPI_num_counters()) == 0 )
           *   fprintf(stderr,"Info:: This machine does not provide hardware counters.0);
           *

       PAPI_num_counters() returns the optimal length of the values array for the high level
       functions. This value corresponds to the number of hardware counters supported by the
       current CPU component.

       Note:
           This function only works for the CPU component. To determine the number of counters on
           another component, use the low level PAPI_num_cmp_hwctrs().

Author

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