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PAPI
5.0.1.0
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PAPI
5.0.1.0
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Go to the source code of this file.
Defines | |
| #define | REPEATS 5 |
| #define | MAXEVENTS 9 |
| #define | SLEEPTIME 100 |
| #define | MINCOUNTS 100000 |
Functions | |
| static double | dummy3 (double x, int iters) |
| int | main (int argc, char **argv) |
| static double dummy3 | ( | double | x, |
| int | iters | ||
| ) | [static] |
Definition at line 230 of file sdsc2.c.
{
int i;
double w, y, z, a, b, c, d, e, f, g, h;
double one;
one = 1.0;
w = x;
y = x;
z = x;
a = x;
b = x;
c = x;
d = x;
e = x;
f = x;
g = x;
h = x;
for ( i = 1; i <= iters; i++ ) {
w = w * 1.000000000001 + one;
y = y * 1.000000000002 + one;
z = z * 1.000000000003 + one;
a = a * 1.000000000004 + one;
b = b * 1.000000000005 + one;
c = c * 0.999999999999 + one;
d = d * 0.999999999998 + one;
e = e * 0.999999999997 + one;
f = f * 0.999999999996 + one;
g = h * 0.999999999995 + one;
h = h * 1.000000000006 + one;
}
return 2.0 * ( a + b + c + d + e + f + w + x + y + z + g + h );
}
| int main | ( | int | argc, |
| char ** | argv | ||
| ) |
Definition at line 24 of file sdsc2.c.
{
PAPI_event_info_t info;
int i, j, retval;
int iters = NUM_FLOPS;
double x = 1.1, y, dtmp;
long long t1, t2;
long long values[MAXEVENTS];
int sleep_time = SLEEPTIME;
#ifdef STARTSTOP
long long dummies[MAXEVENTS];
#endif
double valsample[MAXEVENTS][REPEATS];
double valsum[MAXEVENTS];
double avg[MAXEVENTS];
double spread[MAXEVENTS];
int nevents = MAXEVENTS;
int eventset = PAPI_NULL;
int events[MAXEVENTS];
int fails;
events[0] = PAPI_FP_INS;
events[1] = PAPI_TOT_INS;
events[2] = PAPI_INT_INS;
events[3] = PAPI_TOT_CYC;
events[4] = PAPI_STL_CCY;
events[5] = PAPI_BR_INS;
events[6] = PAPI_SR_INS;
events[7] = PAPI_LD_INS;
events[8] = PAPI_TOT_IIS;
for ( i = 0; i < MAXEVENTS; i++ ) {
values[i] = 0;
valsum[i] = 0;
}
if ( argc > 1 ) {
if ( !strcmp( argv[1], "TESTS_QUIET" ) )
tests_quiet( argc, argv );
else {
sleep_time = atoi( argv[1] );
if ( sleep_time <= 0 )
sleep_time = SLEEPTIME;
}
}
if ( !TESTS_QUIET ) {
printf( "\nAccuracy check of multiplexing routines.\n" );
printf( "Investigating the variance of multiplexed measurements.\n\n" );
}
if ( ( retval =
PAPI_library_init( PAPI_VER_CURRENT ) ) != PAPI_VER_CURRENT )
test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
#ifdef MPX
init_multiplex( );
#endif
if ( ( retval = PAPI_create_eventset( &eventset ) ) )
test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );
#ifdef MPX
/* In Component PAPI, EventSets must be assigned a component index
before you can fiddle with their internals.
0 is always the cpu component */
retval = PAPI_assign_eventset_component( eventset, 0 );
if ( retval != PAPI_OK )
test_fail( __FILE__, __LINE__, "PAPI_assign_eventset_component",
retval );
if ( ( retval = PAPI_set_multiplex( eventset ) ) ) {
if ( retval == PAPI_ENOSUPP) {
test_skip(__FILE__, __LINE__, "Multiplex not supported", 1);
}
test_fail( __FILE__, __LINE__, "PAPI_set_multiplex", retval );
}
#endif
/* What does this code even do? */
nevents = MAXEVENTS;
for ( i = 0; i < nevents; i++ ) {
if ( ( retval = PAPI_add_event( eventset, events[i] ) ) ) {
for ( j = i; j < MAXEVENTS-1; j++ ) {
events[j] = events[j + 1];
}
nevents--;
i--;
}
}
if ( nevents < 2 )
test_skip( __FILE__, __LINE__, "Not enough events left...", 0 );
/* Find a reasonable number of iterations (each
* event active 20 times) during the measurement
*/
t2 = 10000 * 20 * nevents; /* Target: 10000 usec/multiplex, 20 repeats */
if ( t2 > 30e6 )
test_skip( __FILE__, __LINE__, "This test takes too much time",
retval );
/* Measure one run */
t1 = PAPI_get_real_usec( );
y = dummy3( x, iters );
t1 = PAPI_get_real_usec( ) - t1;
if ( t2 > t1 ) /* Scale up execution time to match t2 */
iters = iters * ( int ) ( t2 / t1 );
else if ( t1 > 30e6 ) /* Make sure execution time is < 30s per repeated test */
test_skip( __FILE__, __LINE__, "This test takes too much time",
retval );
if ( ( retval = PAPI_start( eventset ) ) )
test_fail( __FILE__, __LINE__, "PAPI_start", retval );
for ( i = 1; i <= REPEATS; i++ ) {
x = 1.0;
#ifndef STARTSTOP
if ( ( retval = PAPI_reset( eventset ) ) )
test_fail( __FILE__, __LINE__, "PAPI_reset", retval );
#else
if ( ( retval = PAPI_stop( eventset, dummies ) ) )
test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
if ( ( retval = PAPI_start( eventset ) ) )
test_fail( __FILE__, __LINE__, "PAPI_start", retval );
#endif
if ( !TESTS_QUIET )
printf( "\nTest %d (of %d):\n", i, REPEATS );
t1 = PAPI_get_real_usec( );
y = dummy3( x, iters );
PAPI_read( eventset, values );
t2 = PAPI_get_real_usec( );
if ( !TESTS_QUIET ) {
printf( "\n(calculated independent of PAPI)\n" );
printf( "\tOperations= %.1f Mflop", y * 1e-6 );
printf( "\t(%g Mflop/s)\n\n", ( y / ( double ) ( t2 - t1 ) ) );
printf( "PAPI measurements:\n" );
}
for ( j = 0; j < nevents; j++ ) {
PAPI_get_event_info( events[j], &info );
if ( !TESTS_QUIET ) {
printf( "%20s = ", info.short_descr );
printf( LLDFMT, values[j] );
printf( "\n" );
}
dtmp = ( double ) values[j];
valsum[j] += dtmp;
valsample[j][i - 1] = dtmp;
}
if ( !TESTS_QUIET )
printf( "\n" );
}
if ( !TESTS_QUIET ) {
printf( "\n\nEstimated variance relative to average counts:\n" );
for ( j = 0; j < nevents; j++ )
printf( " Event %.2d", j );
printf( "\n" );
}
fails = nevents;
/* Due to limited precision of floating point cannot really use
typical standard deviation compuation for large numbers with
very small variations. Instead compute the std devation
problems with precision.
*/
for ( j = 0; j < nevents; j++ ) {
avg[j] = valsum[j] / REPEATS;
spread[j] = 0;
for ( i = 0; i < REPEATS; ++i ) {
double diff = ( valsample[j][i] - avg[j] );
spread[j] += diff * diff;
}
spread[j] = sqrt( spread[j] / REPEATS ) / avg[j];
if ( !TESTS_QUIET )
printf( "%9.2g ", spread[j] );
/* Make sure that NaN get counted as errors */
if ( spread[j] < MPX_TOLERANCE )
--fails;
else if ( valsum[j] < MINCOUNTS ) /* Neglect inprecise results with low counts */
--fails;
}
if ( !TESTS_QUIET ) {
printf( "\n\n" );
for ( j = 0; j < nevents; j++ ) {
PAPI_get_event_info( events[j], &info );
printf( "Event %.2d: mean=%10.0f, sdev/mean=%7.2g nrpt=%2d -- %s\n",
j, avg[j], spread[j], REPEATS, info.short_descr );
}
printf( "\n\n" );
}
if ( fails )
test_fail( __FILE__, __LINE__, "Values outside threshold", fails );
else
test_pass( __FILE__, NULL, 0 );
return 0;
}
1.7.6.1