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/*
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* File: zero_omp.c
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* Author: Philip Mucci
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* mucci@cs.utk.edu
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* Mods: Nils Smeds
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* smeds@pdc.kth.se
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* Anders Nilsson
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* anni@pdc.kth.se
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*/
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/* This file performs the following test: start, stop and timer
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functionality for 2 slave OMP threads
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- It attempts to use the following two counters. It may use less
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depending on hardware counter resource limitations. These are counted
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in the default counting domain and default granularity, depending on
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the platform. Usually this is the user domain (PAPI_DOM_USER) and
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thread context (PAPI_GRN_THR).
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+ PAPI_FP_INS
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+ PAPI_TOT_CYC
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Each thread inside the Thread routine:
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- Get cyc.
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- Get us.
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- Start counters
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- Do flops
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- Stop and read counters
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- Get us.
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- Get cyc.
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Master serial thread:
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- Get us.
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- Get cyc.
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- Run parallel for loop
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- Get us.
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- Get cyc.
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*/
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#include <stdio.h>
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#include <stdlib.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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#ifdef _OPENMP
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#include <omp.h>
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#else
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#error "This compiler does not understand OPENMP"
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#endif
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const PAPI_hw_info_t *hw_info = NULL;
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void
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Thread( int n )
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{
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int retval, num_tests = 1;
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int EventSet1 = PAPI_NULL;
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int PAPI_event, mask1;
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int num_events1;
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long long **values;
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long long elapsed_us, elapsed_cyc;
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char event_name[PAPI_MAX_STR_LEN];
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if (!TESTS_QUIET) {
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printf( "Thread %#x started\n", omp_get_thread_num( ) );
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}
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/* add PAPI_TOT_CYC and one of the events in
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PAPI_FP_INS, PAPI_FP_OPS or PAPI_TOT_INS,
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depending on the availability of the event
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on the platform */
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EventSet1 = add_two_events( &num_events1, &PAPI_event, &mask1 );
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if (num_events1==0) {
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if (!TESTS_QUIET) printf("No events added!\n");
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test_fail(__FILE__,__LINE__,"No events",0);
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}
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retval = PAPI_event_code_to_name( PAPI_event, event_name );
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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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values = allocate_test_space( num_tests, num_events1 );
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elapsed_us = PAPI_get_real_usec( );
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elapsed_cyc = PAPI_get_real_cyc( );
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retval = PAPI_start( EventSet1 );
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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( n );
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retval = PAPI_stop( EventSet1, values[0] );
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if ( retval != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
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elapsed_us = PAPI_get_real_usec( ) - elapsed_us;
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elapsed_cyc = PAPI_get_real_cyc( ) - elapsed_cyc;
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remove_test_events( &EventSet1, mask1 );
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if ( !TESTS_QUIET ) {
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printf( "Thread %#x %-12s : \t%lld\n", omp_get_thread_num( ),
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event_name, values[0][1] );
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printf( "Thread %#x PAPI_TOT_CYC: \t%lld\n", omp_get_thread_num( ),
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values[0][0] );
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printf( "Thread %#x Real usec : \t%lld\n", omp_get_thread_num( ),
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elapsed_us );
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printf( "Thread %#x Real cycles : \t%lld\n", omp_get_thread_num( ),
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elapsed_cyc );
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}
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/* It is illegal for the threads to exit in OpenMP */
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/* test_pass(__FILE__,0,0); */
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free_test_space( values, num_tests );
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PAPI_unregister_thread( );
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if (!TESTS_QUIET) {
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printf( "Thread %#x finished\n", omp_get_thread_num( ) );
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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 retval;
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long long elapsed_us, elapsed_cyc;
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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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hw_info = PAPI_get_hardware_info( );
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if ( hw_info == NULL ) {
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test_fail( __FILE__, __LINE__, "PAPI_get_hardware_info", 2 );
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}
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if (PAPI_query_event(PAPI_TOT_INS)!=PAPI_OK) {
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if (!quiet) printf("Can't find PAPI_TOT_INS\n");
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test_skip(__FILE__,__LINE__,"Event missing",1);
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}
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if (PAPI_query_event(PAPI_TOT_CYC)!=PAPI_OK) {
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if (!quiet) printf("Can't find PAPI_TOT_CYC\n");
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test_skip(__FILE__,__LINE__,"Event missing",1);
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}
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elapsed_us = PAPI_get_real_usec( );
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elapsed_cyc = PAPI_get_real_cyc( );
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retval = PAPI_thread_init( ( unsigned long ( * )( void ) )
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( omp_get_thread_num ) );
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if ( retval != PAPI_OK ) {
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if ( retval == PAPI_ECMP ) {
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if (!quiet) printf("Trouble init threads\n");
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test_skip( __FILE__, __LINE__, "PAPI_thread_init", retval );
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}
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else {
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test_fail( __FILE__, __LINE__, "PAPI_thread_init", retval );
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}
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}
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#pragma omp parallel
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{
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Thread( 1000000 * ( omp_get_thread_num( ) + 1 ) );
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}
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omp_set_num_threads( 1 );
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Thread( 1000000 * ( omp_get_thread_num( ) + 1 ) );
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omp_set_num_threads( omp_get_max_threads( ) );
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#pragma omp parallel
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{
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Thread( 1000000 * ( omp_get_thread_num( ) + 1 ) );
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}
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elapsed_cyc = PAPI_get_real_cyc( ) - elapsed_cyc;
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elapsed_us = PAPI_get_real_usec( ) - elapsed_us;
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if ( !TESTS_QUIET ) {
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printf( "Master real usec : \t%lld\n", elapsed_us );
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printf( "Master real cycles : \t%lld\n", elapsed_cyc );
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}
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test_pass( __FILE__ );
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return 0;
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}
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