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