PAPI_read_counters - Online Linux Manual PageSection : 3
Updated : September, 2004
Source : PAPI Programmer's Reference
Note : PAPI

NAMEPAPI_read_counters − PAPI High Level: read and reset counters PAPI_accum_counters − PAPI High Level: accumulate and reset counters

SYNOPSISC Interface #include <papi.h> int PAPI_read_counters(long_long *values, int array_len); int PAPI_accum_counters(long_long *values, int array_len);Fortran Interface #include "fpapi.h" PAPIF_read_counters(C_LONG_LONG(*) values, C_INT array_len, C_INT check) PAPIF_accum_counters(C_LONG_LONG(*) values, C_INT array_len, C_INT check)

DESCRIPTIONPAPI_read_counters() copies the event counters into the array values .
 The counters are reset and left running after the call.
PAPI_accum_counters() adds the event counters into the array values .
 The counters are reset and left running after the call.
These calls assume an initialized PAPI library and a properly added event set.

ARGUMENTS*values -- an array to hold the counter values of the counting events array_len -- the number of items in the *events array

RETURN VALUESOn success, these functions return PAPI_OK."
 On error, a non-zero error code is returned.

ERRORSPAPI_EINVAL"  One or more of the arguments is invalid. PAPI_ESYS"  A system or C library call failed inside PAPI, see the errno" variable.

EXAMPLES do_100events(); if (PAPI_read_counters(values, num_hwcntrs) != PAPI_OK) handle_error(1); /* values[0] now equals 100 */ do_100events(); if (PAPI_accum_counters(values, num_hwcntrs) != PAPI_OK) handle_error(1); /* values[0] now equals 200 */ values[0] = -100; do_100events(); if (PAPI_accum_counters(values, num_hwcntrs) != PAPI_OK) handle_error(1); /* values[0] now equals 0 */

BUGSThese functions have no known bugs.

SEE ALSOPAPI_start_counters(3)," PAPI_set_opt(3)," PAPI(3), PAPIF (3)"
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