/* These examples show the essentials in using the PAPI high-level
interface. The program consists of 4 work-loops. The programmer
intends to count the total events for loop 1, 2 and 4, but not
include the number of events in loop 3.
To accomplish this PAPI_read_counters is used as a counter
reset function, while PAPI_accum_counters is used to sum
the contributions of loops 2 and 4 into the total count.
*/
#include <stdio.h>
#include <stdlib.h>
#include "papi.h"
#include "papi_test.h"
#include "do_loops.h"
#define NUM_EVENTS 2
int
main( int argc, char **argv )
{
int retval;
long long values[NUM_EVENTS], dummyvalues[NUM_EVENTS];
long long myvalues[NUM_EVENTS];
int Events[NUM_EVENTS];
int quiet;
/* Set TESTS_QUIET variable */
quiet=tests_quiet( argc, argv );
retval = PAPI_library_init( PAPI_VER_CURRENT );
if ( retval != PAPI_VER_CURRENT ) {
test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
}
/* query and set up the right events to monitor */
if ( PAPI_query_event( PAPI_FP_INS ) == PAPI_OK ) {
Events[0] = PAPI_FP_INS;
} else {
Events[0] = PAPI_TOT_INS;
}
Events[1] = PAPI_TOT_CYC;
retval = PAPI_start_counters( ( int * ) Events, NUM_EVENTS );
if ( retval != PAPI_OK ) {
if (!quiet) printf("Cannot start events\n");
test_skip( __FILE__, __LINE__, "PAPI_start_counters", retval );
}
/* Loop 1 */
do_flops( NUM_FLOPS );
retval = PAPI_read_counters( values, NUM_EVENTS );
if ( retval != PAPI_OK )
test_fail( __FILE__, __LINE__, "PAPI_read_counters", retval );
if ( !quiet )
printf( TWO12, values[0], values[1], "(Counters continuing...)\n" );
myvalues[0] = values[0];
myvalues[1] = values[1];
/* Loop 2 */
do_flops( NUM_FLOPS );
retval = PAPI_accum_counters( values, NUM_EVENTS );
if ( retval != PAPI_OK )
test_fail( __FILE__, __LINE__, "PAPI_accum_counters", retval );
if ( !quiet )
printf( TWO12, values[0], values[1], "(Counters being ''held'')\n" );
/* Loop 3 */
/* Simulated code that should not be counted */
do_flops( NUM_FLOPS );
retval = PAPI_read_counters( dummyvalues, NUM_EVENTS );
if ( retval != PAPI_OK )
test_fail( __FILE__, __LINE__, "PAPI_read_counters", retval );
if ( !quiet )
printf( TWO12, dummyvalues[0], dummyvalues[1], "(Skipped counts)\n" );
if ( !quiet )
printf( "%12s %12s (''Continuing'' counting)\n", "xxx", "xxx" );
/* Loop 4 */
do_flops( NUM_FLOPS );
retval = PAPI_accum_counters( values, NUM_EVENTS );
if ( retval != PAPI_OK )
test_fail( __FILE__, __LINE__, "PAPI_accum_counters", retval );
if ( !quiet )
printf( TWO12, values[0], values[1], "" );
if ( !quiet ) {
printf( "----------------------------------\n" );
printf( "Verification: The last line in each experiment should be\n" );
printf( "approximately three times the value of the first line.\n" );
}
{
long long min, max;
min = ( long long ) ( ( double ) myvalues[0] * .9 );
max = ( long long ) ( ( double ) myvalues[0] * 1.1 );
if ( values[0] < ( 3 * min ) || values[0] > ( 3 * max ) ) {
retval = 1;
if ( PAPI_query_event( PAPI_FP_INS ) == PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_FP_INS", 1 );
} else {
test_fail( __FILE__, __LINE__, "PAPI_TOT_INS", 1 );
}
}
min = ( long long ) ( ( double ) myvalues[1] * .9 );
max = ( long long ) ( ( double ) myvalues[1] * 1.1 );
if ( values[1] < ( 3 * min ) || values[1] > ( 3 * max ) ) {
retval = 1;
test_fail( __FILE__, __LINE__, "PAPI_TOT_CYC", 1 );
}
}
/* The values array is not allocated through allocate_test_space
* so we need to pass NULL here */
test_pass( __FILE__ );
return 0;
}