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/*
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* File: overflow_twoevents.c
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* Author: min@cs.utk.edu
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* Min Zhou
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* Mods: Philip Mucci
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* mucci@cs.utk.edu
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*/
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/* This file performs the following test: overflow dispatch on 2 counters. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "papi.h"
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#include "papi_test.h"
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#include "do_loops.h"
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#define OVER_FMT "handler(%d) Overflow at %p! vector=%#llx\n"
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#define OUT_FMT "%-12s : %18lld%18lld%18lld\n"
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#define VEC_FMT " at vector %#llx, event %-12s : %6d\n"
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typedef struct
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{
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long long mask;
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int count;
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} ocount_t;
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/* there are two experiments: batch and interleaf; for each experiment there
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are three possible vectors, one counter overflows, the other
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counter overflows, both overflow */
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static ocount_t overflow_counts[2][3] =
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{ {{0, 0}, {0, 0}, {0, 0}}, {{0, 0}, {0, 0}, {0, 0}} };
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static int total_unknown = 0;
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static void
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handler( int mode, void *address, long long overflow_vector, void *context )
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{
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( void ) context; /*unused */
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int i;
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if ( !TESTS_QUIET ) {
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fprintf( stderr, OVER_FMT, mode, address, overflow_vector );
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}
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/* Look for the overflow_vector entry */
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for ( i = 0; i < 3; i++ ) {
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if ( overflow_counts[mode][i].mask == overflow_vector ) {
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overflow_counts[mode][i].count++;
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return;
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}
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}
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/* Didn't find it so add it. */
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for ( i = 0; i < 3; i++ ) {
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if ( overflow_counts[mode][i].mask == ( long long ) 0 ) {
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overflow_counts[mode][i].mask = overflow_vector;
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overflow_counts[mode][i].count = 1;
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return;
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}
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}
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/* Unknown entry!?! */
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total_unknown++;
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}
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static void
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handler_batch( int EventSet, void *address, long long overflow_vector,
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void *context )
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{
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( void ) EventSet; /*unused */
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handler( 0, address, overflow_vector, context );
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}
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static void
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handler_interleaf( int EventSet, void *address, long long overflow_vector,
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void *context )
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{
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( void ) EventSet; /*unused */
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handler( 1, address, overflow_vector, context );
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}
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int
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main( int argc, char **argv )
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{
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int EventSet = PAPI_NULL;
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long long ( values[3] )[2];
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int retval;
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int PAPI_event, k, idx[4];
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char event_name[3][PAPI_MAX_STR_LEN];
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int num_events1;
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int threshold = THRESHOLD;
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int quiet;
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/* Set TESTS_QUIET variable */
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quiet=tests_quiet( argc, argv );
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retval = PAPI_library_init( PAPI_VER_CURRENT );
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if (retval != PAPI_VER_CURRENT ) {
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test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
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}
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retval = PAPI_create_eventset( &EventSet );
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if (retval != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );
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}
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/* decide which of PAPI_FP_INS, PAPI_FP_OPS or PAPI_TOT_INS to add,
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depending on the availability and derived status of the event on
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this platform */
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if ( ( PAPI_event = find_nonderived_event( ) ) == 0 ) {
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if (!quiet) printf("No events found!\n");
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test_skip( __FILE__, __LINE__, "no PAPI_event", 0 );
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}
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if ( ( retval = PAPI_add_event( EventSet, PAPI_event ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
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if ( ( retval = PAPI_add_event( EventSet, PAPI_TOT_CYC ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
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retval = PAPI_start( EventSet );
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if ( retval != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_start", retval );
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do_flops( NUM_FLOPS );
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if ( ( retval = PAPI_stop( EventSet, values[0] ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
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/* Set both overflows after adding both events (batch) */
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retval = PAPI_overflow( EventSet, PAPI_event, threshold, 0,
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handler_batch );
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if (retval != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );
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}
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retval = PAPI_overflow( EventSet, PAPI_TOT_CYC, threshold, 0,
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handler_batch );
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if (retval != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );
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}
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if ( ( retval = PAPI_start( EventSet ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_start", retval );
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do_flops( NUM_FLOPS );
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retval = PAPI_stop( EventSet, values[1] );
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if ( retval != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
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num_events1 = 1;
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retval =
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PAPI_get_overflow_event_index( EventSet, 1, &idx[0], &num_events1 );
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if ( retval != PAPI_OK ) {
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printf( "PAPI_get_overflow_event_index error: %s\n",
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PAPI_strerror( retval ) );
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}
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num_events1 = 1;
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retval =
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PAPI_get_overflow_event_index( EventSet, 2, &idx[1], &num_events1 );
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if ( retval != PAPI_OK ) {
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printf( "PAPI_get_overflow_event_index error: %s\n",
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PAPI_strerror( retval ) );
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}
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if ( ( retval = PAPI_cleanup_eventset( EventSet ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_cleanup_eventset", retval );
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/* Add each event and set its overflow (interleaved) */
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if ( ( retval = PAPI_add_event( EventSet, PAPI_event ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
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if ( ( retval =
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PAPI_overflow( EventSet, PAPI_event, threshold, 0,
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handler_interleaf ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );
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if ( ( retval = PAPI_add_event( EventSet, PAPI_TOT_CYC ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
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if ( ( retval =
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PAPI_overflow( EventSet, PAPI_TOT_CYC, threshold, 0,
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handler_interleaf ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );
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if ( ( retval = PAPI_start( EventSet ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_start", retval );
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do_flops( NUM_FLOPS );
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if ( ( retval = PAPI_stop( EventSet, values[2] ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
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num_events1 = 1;
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retval =
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PAPI_get_overflow_event_index( EventSet, 1, &idx[2], &num_events1 );
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if ( retval != PAPI_OK ) {
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printf( "PAPI_get_overflow_event_index error: %s\n",
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PAPI_strerror( retval ) );
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}
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num_events1 = 1;
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retval = PAPI_get_overflow_event_index( EventSet, 2, &idx[3],
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&num_events1 );
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if ( retval != PAPI_OK ) {
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printf( "PAPI_get_overflow_event_index error: %s\n",
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PAPI_strerror( retval ) );
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}
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if ( ( retval = PAPI_cleanup_eventset( EventSet ) ) != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_cleanup_eventset", retval );
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retval = PAPI_event_code_to_name( PAPI_event, event_name[0] );
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if (retval != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_event_code_to_name", retval );
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}
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retval = PAPI_event_code_to_name( PAPI_TOT_CYC, event_name[1] );
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if (retval != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_event_code_to_name", retval );
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}
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strcpy( event_name[2], "Unknown" );
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if (!TESTS_QUIET) {
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printf( "Test case: Overflow dispatch of both events in set with 2 events.\n" );
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printf( "---------------------------------------------------------------\n" );
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printf( "Threshold for overflow is: %d\n", threshold );
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printf( "Using %d iterations of c += a*b\n", NUM_FLOPS );
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printf( "-----------------------------------------------\n" );
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printf( "Test type : %18s%18s%18s\n", "1 (no overflow)", "2 (batch)",
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"3 (interleaf)" );
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printf( OUT_FMT, event_name[0], ( values[0] )[0], ( values[1] )[0],
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( values[2] )[0] );
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printf( OUT_FMT, event_name[1], ( values[0] )[1], ( values[1] )[1],
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( values[2] )[1] );
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printf( "\n" );
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printf( "Predicted overflows at event %-12s : %6d\n", event_name[0],
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( int ) ( ( values[0] )[0] / threshold ) );
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printf( "Predicted overflows at event %-12s : %6d\n", event_name[1],
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( int ) ( ( values[0] )[1] / threshold ) );
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printf( "\nBatch overflows (add, add, over, over):\n" );
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for ( k = 0; k < 2; k++ ) {
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if ( overflow_counts[0][k].mask ) {
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printf( VEC_FMT, ( long long ) overflow_counts[0][k].mask,
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event_name[idx[k]], overflow_counts[0][k].count );
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}
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}
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printf( "\nInterleaved overflows (add, over, add, over):\n" );
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for ( k = 0; k < 2; k++ ) {
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if ( overflow_counts[1][k].mask )
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printf( VEC_FMT,
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( long long ) overflow_counts[1][k].mask,
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event_name[idx[k + 2]],
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overflow_counts[1][k].count );
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}
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printf( "\nCases 2+3 Unknown overflows: %d\n", total_unknown );
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printf( "-----------------------------------------------\n" );
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}
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if ( overflow_counts[0][0].count == 0 || overflow_counts[0][1].count == 0 )
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test_fail( __FILE__, __LINE__, "a batch counter had no overflows", 1 );
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if ( overflow_counts[1][0].count == 0 || overflow_counts[1][1].count == 0 )
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test_fail( __FILE__, __LINE__,
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"an interleaved counter had no overflows", 1 );
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if ( total_unknown > 0 )
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test_fail( __FILE__, __LINE__, "Unknown counter had overflows", 1 );
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test_pass( __FILE__ );
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return 0;
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}
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