/* zero.c */
/* This is possibly the most important PAPI tests, and is the one */
/* that is often used as a quick test that PAPI is working. */
/* We should make sure that it always passes, if possible. */
/* Traditionally it used FLOPS, due to the importance of this to HPC. */
/* This has been changed to use Instructions/Cycles as some recent */
/* major Intel chips do not have good floating point events and would fail. */
#include <stdio.h>
#include <stdlib.h>
#include "papi.h"
#include "papi_test.h"
#include "testcode.h"
#define NUM_EVENTS 2
#define NUM_LOOPS 200
int main( int argc, char **argv ) {
int retval, tmp, result, i;
int EventSet1 = PAPI_NULL;
long long values[NUM_EVENTS];
long long elapsed_us, elapsed_cyc, elapsed_virt_us, elapsed_virt_cyc;
double ipc;
int quiet=0;
/* Set TESTS_QUIET variable */
quiet=tests_quiet( argc, argv );
/* Init the PAPI library */
retval = PAPI_library_init( PAPI_VER_CURRENT );
if ( retval != PAPI_VER_CURRENT ) {
test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
}
/* Initialize the EventSet */
retval=PAPI_create_eventset(&EventSet1);
if (retval!=PAPI_OK) {
test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );
}
/* Add PAPI_TOT_CYC */
retval=PAPI_add_named_event(EventSet1,"PAPI_TOT_CYC");
if (retval!=PAPI_OK) {
if (!quiet) printf("Trouble adding PAPI_TOT_CYC\n");
test_skip( __FILE__, __LINE__, "adding PAPI_TOT_CYC", retval );
}
/* Add PAPI_TOT_INS */
retval=PAPI_add_named_event(EventSet1,"PAPI_TOT_INS");
if (retval!=PAPI_OK) {
test_fail( __FILE__, __LINE__, "adding PAPI_TOT_INS", retval );
}
/* warm up the processor to pull it out of idle state */
for(i=0;i<100;i++) {
result=instructions_million();
}
if (result==CODE_UNIMPLEMENTED) {
if (!quiet) printf("Instructions testcode not available\n");
test_skip( __FILE__, __LINE__, "No instructions code", retval );
}
/* Gather before stats */
elapsed_us = PAPI_get_real_usec( );
elapsed_cyc = PAPI_get_real_cyc( );
elapsed_virt_us = PAPI_get_virt_usec( );
elapsed_virt_cyc = PAPI_get_virt_cyc( );
/* Start PAPI */
retval = PAPI_start( EventSet1 );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_start", retval );
}
/* our work code */
for(i=0;i<NUM_LOOPS;i++) {
instructions_million();
}
/* Stop PAPI */
retval = PAPI_stop( EventSet1, values );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
}
/* Calculate total values */
elapsed_virt_us = PAPI_get_virt_usec( ) - elapsed_virt_us;
elapsed_virt_cyc = PAPI_get_virt_cyc( ) - elapsed_virt_cyc;
elapsed_us = PAPI_get_real_usec( ) - elapsed_us;
elapsed_cyc = PAPI_get_real_cyc( ) - elapsed_cyc;
/* Shutdown the EventSet */
retval = PAPI_remove_named_event( EventSet1, "PAPI_TOT_CYC" );
if (retval!=PAPI_OK) {
test_fail( __FILE__, __LINE__, "PAPI_remove_named_event", retval );
}
retval = PAPI_remove_named_event( EventSet1, "PAPI_TOT_INS" );
if (retval!=PAPI_OK) {
test_fail( __FILE__, __LINE__, "PAPI_remove_named_event", retval );
}
retval=PAPI_destroy_eventset( &EventSet1 );
if (retval!=PAPI_OK) {
test_fail( __FILE__, __LINE__, "PAPI_destroy_eventset", retval );
}
/* Calculate Instructions per Cycle, avoiding division by zero */
if (values[0]!=0) {
ipc = (double)values[1]/(double)values[0];
}
else {
ipc=0.0;
}
/* Print the results */
if ( !quiet ) {
printf( "Test case 0: start, stop.\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 1 million instructions\n", NUM_LOOPS );
printf( "-------------------------------------------------------------------------\n" );
printf( "Test type : \t 1\n" );
/* cycles is first, other event second */
printf( "%-12s %12lld\n", "PAPI_TOT_CYC : \t", values[0] );
printf( "%-12s %12lld\n", "PAPI_TOT_INS : \t", values[1] );
printf( "%-12s %12.2lf\n", "IPC : \t", ipc );
printf( "%-12s %12lld\n", "Real usec : \t", elapsed_us );
printf( "%-12s %12lld\n", "Real cycles : \t", elapsed_cyc );
printf( "%-12s %12lld\n", "Virt usec : \t", elapsed_virt_us );
printf( "%-12s %12lld\n", "Virt cycles : \t", elapsed_virt_cyc );
printf( "-------------------------------------------------------------------------\n" );
printf( "Verification: PAPI_TOT_INS should be roughly %d\n", NUM_LOOPS*1000000 );
}
/* Check that TOT_INS is reasonable */
if (abs(values[1] - (1000000*NUM_LOOPS)) > (1000000*NUM_LOOPS)) {
printf("%s Error of %.2f%%\n", "PAPI_TOT_INS", (100.0 * (double)(values[1] - (1000000*NUM_LOOPS)))/(1000000*NUM_LOOPS));
test_fail( __FILE__, __LINE__, "Instruction validation", 0 );
}
/* Check that TOT_CYC is non-zero */
if(values[0]==0) {
printf("Cycles is zero\n");
test_fail( __FILE__, __LINE__, "Cycles validation", 0 );
}
/* Unless you have an amazing processor, IPC should be < 100 */
if ((ipc <=0.01 ) || (ipc >=100.0)) {
printf("Unlikely IPC of %.2f%%\n", ipc);
test_fail( __FILE__, __LINE__, "IPC validation", 0 );
}
test_pass( __FILE__ );
return 0;
}