/*

* 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;

}