/* This file performs the following test: start, read, stop and again functionality

   - It attempts to use the following three counters. It may use less depending on
     hardware counter resource limitations. These are counted in the default counting
     domain and default granularity, depending on the platform. Usually this is 
     the user domain (PAPI_DOM_USER) and thread context (PAPI_GRN_THR).
     + PAPI_FP_INS or PAPI_TOT_INS if PAPI_FP_INS doesn't exist
     + PAPI_TOT_CYC
   - Start counters
   - Do flops
   - Read counters
   - Reset counters
   - Do flops
   - Read counters
   - Do flops
   - Read counters
   - Do flops
   - Stop and read counters
   - Read counters
*/

#include <stdio.h>
#include <string.h>
#include <mpi.h>

#include "papi.h"
#include "papi_test.h"

int
main( int argc, char **argv )
{
	int retval, num_tests = 5, num_events, tmp;
	long long **values;
	int EventSet = PAPI_NULL;
	int PAPI_event, mask;
	char event_name[PAPI_MAX_STR_LEN], add_event_str[PAPI_MAX_STR_LEN];
	int quiet;

	/* Set TESTS_QUIET variable */
	quiet=tests_quiet( argc, argv );


	MPI_Init( 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 instruction to monitor */
	if ( PAPI_query_event( PAPI_FP_INS ) == PAPI_OK ) {
		PAPI_event = PAPI_FP_INS;
		mask = MASK_FP_INS | MASK_TOT_CYC;
	} else {
		PAPI_event = PAPI_TOT_INS;
		mask = MASK_TOT_INS | MASK_TOT_CYC;
	}

	retval = PAPI_event_code_to_name( PAPI_event, event_name );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_event_code_to_name", retval );
	sprintf( add_event_str, "PAPI_add_event[%s]", event_name );

	EventSet = add_test_events( &num_events, &mask );

	values = allocate_test_space( num_tests, num_events );

	retval = PAPI_start( EventSet );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_start", retval );

	do_flops( NUM_FLOPS );

	retval = PAPI_read( EventSet, values[0] );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_read", retval );

	retval = PAPI_reset( EventSet );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_reset", retval );

	do_flops( NUM_FLOPS );

	retval = PAPI_read( EventSet, values[1] );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_read", retval );

	do_flops( NUM_FLOPS );

	retval = PAPI_read( EventSet, values[2] );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_read", retval );

	do_flops( NUM_FLOPS );

	retval = PAPI_stop( EventSet, values[3] );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_stop", retval );

	retval = PAPI_read( EventSet, values[4] );
	if ( retval != PAPI_OK )
		test_fail( __FILE__, __LINE__, "PAPI_read", retval );

	remove_test_events( &EventSet, mask );

	if ( !quiet ) {
		printf( "Test case 1: Non-overlapping start, stop, read.\n" );
		printf( "-----------------------------------------------\n" );
		tmp = PAPI_get_opt( PAPI_DEFDOM, NULL );
		printf( "Default domain is: %d (%s)\n", tmp,
				stringify_all_domains( tmp ) );
		tmp = PAPI_get_opt( PAPI_DEFGRN, NULL );
		printf( "Default granularity is: %d (%s)\n", tmp,
				stringify_granularity( tmp ) );
		printf( "Using %d iterations of c += a*b\n", NUM_FLOPS );
		printf
			( "-------------------------------------------------------------------------\n" );

		printf( "Test type   : \t1\t\t2\t\t3\t\t4\t\t5\n" );
		sprintf( add_event_str, "%s : ", event_name );
		printf( TAB5, add_event_str,
				( values[0] )[0], ( values[1] )[0], ( values[2] )[0],
				( values[3] )[0], ( values[4] )[0] );
		printf( TAB5, "PAPI_TOT_CYC: ", ( values[0] )[1], ( values[1] )[1],
				( values[2] )[1], ( values[3] )[1], ( values[4] )[1] );
		printf
			( "-------------------------------------------------------------------------\n" );

		printf( "Verification:\n" );
		printf( "Column 1 approximately equals column 2\n" );
		printf( "Column 3 approximately equals 2 * column 2\n" );
		printf( "Column 4 approximately equals 3 * column 2\n" );
		printf( "Column 4 exactly equals column 5\n" );
	}

	{
		long long min, max;
		min = ( long long ) ( values[1][0] * .9 );
		max = ( long long ) ( values[1][0] * 1.1 );

		if ( values[0][0] > max || values[0][0] < min ||
			 values[2][0] > ( 2 * max )
			 || values[2][0] < ( 2 * min ) || values[3][0] > ( 3 * max )
			 || values[3][0] < ( 3 * min )
			 || values[3][0] != values[4][0] ) {
			printf( "min: " );
			printf( LLDFMT, min );
			printf( "max: " );
			printf( LLDFMT, max );
			printf( "1st: " );
			printf( LLDFMT, values[0][0] );
			printf( "2nd: " );
			printf( LLDFMT, values[1][0] );
			printf( "3rd: " );
			printf( LLDFMT, values[2][0] );
			printf( "4th: " );
			printf( LLDFMT, values[3][0] );
			printf( "5th: " );
			printf( LLDFMT, values[4][0] );
			printf( "\n" );
			test_fail( __FILE__, __LINE__, event_name, 1 );
		}

		min = ( long long ) ( values[1][1] * .9 );
		max = ( long long ) ( values[1][1] * 1.1 );
		if ( values[0][1] > max || values[0][1] < min ||
			 values[2][1] > ( 2 * max )
			 || values[2][1] < ( 2 * min ) || values[3][1] > ( 3 * max )
			 || values[3][1] < ( 3 * min )
			 || values[3][1] != values[4][1] ) {
			test_fail( __FILE__, __LINE__, "PAPI_TOT_CYC", 1 );
		}
	}
	test_pass( __FILE__, values, num_tests );

	MPI_Finalize(  );
	exit( 1 );
}