table of contents
| PAPI_num_counters(3) | PAPI | PAPI_num_counters(3) |
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.
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¶
Generated automatically by Doxygen for PAPI from the source code.
| Wed Oct 31 2018 | Version 5.2.0.0 |