PAPI_num_hwctrs - Online Linux Manual Page

Section : 3
Updated : April, 2007
Source : PAPI Programmer's Reference
Note : PAPI
NAME
 PAPI_num_hwctrs − return the number of hardware counters on the cpu
 PAPI_num_cmp_hwctrs − return the number of hardware counters for the specified component
SYNOPSISC Interface #include <papi.h> int PAPI_num_hwctrs(); int PAPI_num_cmp_hwctrs(int cidx);Fortran Interface #include "fpapi.h" PAPIF_num_hwctrs(C_INT num)
DESCRIPTIONPAPI_num_hwctrs()" returns the number of physical hardware counters present in the cpu. This is included to preserve backward compatability. PAPI_num_cmp_hwctrs()" returns the number of counters present in the specified component. By convention, component 0 is always the cpu. This count does not include any special purpose registers or other performance hardware. PAPI_library_init(3) must be called in order for this function to return anything greater than 0.
ARGUMENTScidx -- An integer identifier for a component. By convention, component 0 is always the cpu component.
RETURN VALUESOn success, this function returns a value greater than zero. A zero result usually means the library has not been initialized.
EXAMPLES/* Query the cpu component for the number of counters. */ printf("%d hardware counters found.\n", PAPI_num_cmp_hwctrs(0));
BUGSNone.
SEE ALSOPAPI_init_library(3), PAPI(3), PAPI_F (3)" 0
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ERROR : Need New Coding :         (rof_nr_x|149|PAPI_num_hwctrs.3|48|\n", PAPI_num_cmp_hwctrs(0));|printf("%d hardware counters found.\n", PAPI_num_cmp_hwctrs(0)); )