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/*
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* Test PAPI with fork() and exec().
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*/
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "papi.h"
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#include "papi_test.h"
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#include "testcode.h"
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#define MAX_EVENTS 3
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static int Event[MAX_EVENTS] = {
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PAPI_TOT_CYC,
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PAPI_FP_INS,
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PAPI_FAD_INS,
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};
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static int Threshold[MAX_EVENTS] = {
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8000000,
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4000000,
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4000000,
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};
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static struct timeval start, last;
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static long count, total;
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static void
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my_handler( int EventSet, void *pc, long long ovec, void *context )
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{
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( void ) EventSet;
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( void ) pc;
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( void ) ovec;
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( void ) context;
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count++;
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total++;
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}
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static void
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print_rate( const char *str )
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{
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static int last_count = -1;
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struct timeval now;
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double st_secs, last_secs;
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gettimeofday( &now, NULL );
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st_secs = ( double ) ( now.tv_sec - start.tv_sec )
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+ ( ( double ) ( now.tv_usec - start.tv_usec ) ) / 1000000.0;
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last_secs = ( double ) ( now.tv_sec - last.tv_sec )
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+ ( ( double ) ( now.tv_usec - last.tv_usec ) ) / 1000000.0;
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if ( last_secs <= 0.001 )
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last_secs = 0.001;
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if (!TESTS_QUIET) {
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printf( "[%d] %s, time = %.3f, total = %ld, last = %ld, rate = %.1f/sec\n",
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getpid( ), str, st_secs, total, count,
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( ( double ) count ) / last_secs );
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}
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if ( last_count != -1 ) {
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if ( count < .1 * last_count ) {
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test_fail( __FILE__, __LINE__, "Interrupt rate changed!", 1 );
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exit( 1 );
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}
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}
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last_count = ( int ) count;
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count = 0;
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last = now;
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}
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static void
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run( const char *str, int len )
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{
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int n;
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for ( n = 1; n <= len; n++ ) {
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do_cycles( 1 );
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print_rate( str );
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}
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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 num_events = 1;
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const char *name = "unknown";
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int ev,EventSet = PAPI_NULL;
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int quiet,retval;
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/* Used to be able to set this via command line */
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num_events=1;
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/* Set TESTS_QUIET variable */
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quiet=tests_quiet( argc, argv );
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do_cycles( 1 );
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/* Zero out the Counters */
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gettimeofday( &start, NULL );
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last = start;
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count = 0;
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total = 0;
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/* Initialize PAPI */
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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 failed", 1 );
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}
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name = argv[0];
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if (!quiet) {
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printf( "[%d] %s, num_events = %d\n", getpid(),
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name, num_events );
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}
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/* Create eventset */
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if ( PAPI_create_eventset( &EventSet ) != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_create_eventset failed", 1 );
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}
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/* Add events */
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for ( ev = 0; ev < num_events; ev++ ) {
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if ( PAPI_add_event( EventSet, Event[ev] ) != PAPI_OK ) {
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if (!quiet) printf("Trouble adding event\n");
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test_skip( __FILE__, __LINE__, "PAPI_add_event failed", 1 );
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}
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}
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/* Set overflow */
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for ( ev = 0; ev < num_events; ev++ ) {
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if ( PAPI_overflow( EventSet, Event[ev],
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Threshold[ev], 0, my_handler )
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!= PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_overflow failed", 1 );
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}
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}
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/* Start measuring */
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if ( PAPI_start( EventSet ) != PAPI_OK ) {
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test_fail( __FILE__, __LINE__, "PAPI_start failed", 1 );
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}
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/* Tun a bit */
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run( name, 3 );
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/* Stop measuring */
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if (!quiet) {
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printf("[%d] %s, %s\n", getpid(), name, "stop");
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}
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if ( PAPI_stop( EventSet, NULL ) != PAPI_OK ) {
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test_fail( name, __LINE__, "PAPI_stop failed", 1 );
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}
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if (!quiet) {
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printf("[%d] %s, %s\n", getpid(),
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name, "exec(./child_overflow)");
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}
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/* exec the child_overflow helper program */
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/* we should never return from this */
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if ( access( "./child_overflow", X_OK ) == 0 )
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execl( "./child_overflow", "./child_overflow",
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( quiet ? "TESTS_QUIET" : NULL ), NULL );
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else if ( access( "./ctests/child_overflow", X_OK ) == 0 )
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execl( "./ctests/child_overflow", "./ctests/child_overflow",
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( quiet ? "TESTS_QUIET" : NULL ), NULL );
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test_fail( name, __LINE__, "exec failed", 1 );
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return 0;
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}
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