Provided by: libpapi-dev_5.4.3-2_amd64
PAPI_num_counters - Get the number of hardware counters available on the system.
@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().
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