PAPI_read(3) PAPI PAPI_read(3)NAMEPAPI_read-
Read hardware counters from an event set.
SYNOPSISDetailed Description
C Interface:
#include <papi.h>
int PAPI_read(int EventSet, long_long * values );
PAPI_read() copies the counters of the indicated event set into the
provided array.
The counters continue counting after the read.
Note the differences between PAPI_read() and PAPI_accum(), specifically
that PAPI_accum() resets the values array to zero.
PAPI_read() assumes an initialized PAPI library and a properly added
event set.
Parameters:
EventSet -- an integer handle for a PAPI Event Set as created by
PAPI_create_eventset()
*values -- an array to hold the counter values of the counting
events
Return values:
PAPI_EINVAL One or more of the arguments is invalid.
PAPI_ESYS A system or C library call failed inside PAPI, see the
errno variable.
PAPI_ENOEVST The event set specified does not exist.
Examples
* do_100events();
* if (PAPI_read(EventSet, values) != PAPI_OK)
* handle_error(1);
* // values[0] now equals 100
* do_100events();
* if (PAPI_accum(EventSet, values) != PAPI_OK)
* handle_error(1);
* // values[0] now equals 200
* values[0] = -100;
* do_100events();
* if (PAPI_accum(EventSet, values) != PAPI_OK)
* handle_error(1);
* // values[0] now equals 0
*
See Also:
PAPI_accum
PAPI_start
PAPI_stop
PAPI_reset
Author
Generated automatically by Doxygen for PAPI from the source code.
Version 5.2.0.0 Mon Oct 28 2013 PAPI_read(3)
