/*
* File: overflow_single_event.c
* Author: Philip Mucci
* mucci@cs.utk.edu
*/
/* This file performs the following test: overflow dispatch of an eventset
with just a single event.
The Eventset contains:
+ PAPI_FP_INS (overflow monitor)
- Start eventset 1
- Do flops
- Stop and measure eventset 1
- Set up overflow on eventset 1
- Start eventset 1
- Do flops
- Stop eventset 1
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "papi.h"
#include "papi_test.h"
#include "do_loops.h"
#define OVER_FMT "handler(%d ) Overflow at %p overflow_vector=%#llx!\n"
#define OUT_FMT "%-12s : %16lld%16lld\n"
static int total = 0; /* total overflows */
void
handler( int EventSet, void *address, long long overflow_vector, void *context )
{
( void ) context;
if ( !TESTS_QUIET ) {
fprintf( stderr, OVER_FMT, EventSet, address, overflow_vector );
}
total++;
}
int
main( int argc, char **argv )
{
int EventSet = PAPI_NULL;
long long values[2] = { 0, 0 };
long long min, max;
int num_flops = NUM_FLOPS, retval;
int PAPI_event = 0, mythreshold;
char event_name[PAPI_MAX_STR_LEN];
const PAPI_hw_info_t *hw_info = NULL;
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 );
}
hw_info = PAPI_get_hardware_info( );
if ( hw_info == NULL )
test_fail( __FILE__, __LINE__, "PAPI_get_hardware_info", 2 );
/* Ugh */
if ( ( !strncmp( hw_info->model_string, "UltraSPARC", 10 ) &&
!( strncmp( hw_info->vendor_string, "SUN", 3 ) ) ) ||
( !strncmp( hw_info->model_string, "AMD K7", 6 ) ) ||
( !strncmp( hw_info->vendor_string, "Cray", 4 ) ) ||
( strstr( hw_info->model_string, "POWER3" ) ) ) {
/* query and set up the right instruction to monitor */
if ( PAPI_query_event( PAPI_TOT_INS ) == PAPI_OK ) {
PAPI_event = PAPI_TOT_INS;
} else {
test_fail( __FILE__, __LINE__,
"PAPI_TOT_INS not available on this Sun platform!", 0 );
}
} else {
/* query and set up the right instruction to monitor */
PAPI_event = find_nonderived_event( );
}
if (PAPI_event==0) {
if (!quiet) printf("Trouble adding event\n");
test_skip(__FILE__,__LINE__,"Event trouble",1);
}
if (( PAPI_event == PAPI_FP_OPS ) || ( PAPI_event == PAPI_FP_INS )) {
mythreshold = THRESHOLD;
}
else {
#if defined(linux)
mythreshold = ( int ) hw_info->cpu_max_mhz * 20000;
#else
mythreshold = THRESHOLD * 2;
#endif
}
retval = PAPI_create_eventset( &EventSet );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );
}
retval = PAPI_add_event( EventSet, PAPI_event );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
}
retval = PAPI_start( EventSet );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_start", retval );
}
do_flops( NUM_FLOPS );
retval = PAPI_stop( EventSet, &values[0] );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
}
retval = PAPI_overflow( EventSet, PAPI_event, mythreshold, 0, handler );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );
}
retval = PAPI_start( EventSet );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_start", retval );
}
do_flops( NUM_FLOPS );
retval = PAPI_stop( EventSet, &values[1] );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
}
/* double ugh */
#if defined(linux) || defined(__ia64__) || defined(_POWER4)
num_flops *= 2;
#endif
if ( !quiet ) {
if ( ( retval =
PAPI_event_code_to_name( PAPI_event, event_name ) ) != PAPI_OK )
test_fail( __FILE__, __LINE__, "PAPI_event_code_to_name", retval );
printf
( "Test case: Overflow dispatch of 1st event in set with 1 event.\n" );
printf
( "--------------------------------------------------------------\n" );
printf( "Threshold for overflow is: %d\n", mythreshold );
printf( "Using %d iterations of c += a*b\n", NUM_FLOPS );
printf( "-----------------------------------------------\n" );
printf( "Test type : %16d%16d\n", 1, 2 );
printf( OUT_FMT, event_name, values[0], values[1] );
printf( "Overflows : %16s%16d\n", "", total );
printf( "-----------------------------------------------\n" );
printf( "Verification:\n" );
/*
if (PAPI_event == PAPI_FP_INS)
printf("Row 1 approximately equals %d %d\n", num_flops, num_flops);
printf("Column 1 approximately equals column 2\n");
*/
printf( "Row 3 approximately equals %u +- %u %%\n",
( unsigned ) ( ( values[0] ) / ( long long ) mythreshold ),
( unsigned ) ( OVR_TOLERANCE * 100.0 ) );
}
/*
min = (long long)(values[0]*(1.0-TOLERANCE));
max = (long long)(values[0]*(1.0+TOLERANCE));
if ( values[1] > max || values[1] < min )
test_fail(__FILE__, __LINE__, event_name, 1);
*/
min =
( long long ) ( ( ( double ) values[0] * ( 1.0 - OVR_TOLERANCE ) ) /
( double ) mythreshold );
max =
( long long ) ( ( ( double ) values[0] * ( 1.0 + OVR_TOLERANCE ) ) /
( double ) mythreshold );
if ( total > max || total < min )
test_fail( __FILE__, __LINE__, "Overflows", 1 );
test_pass( __FILE__ );
return 0;
}