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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <mpi.h>
#include "comex.h"
#include "stats.h"
static int me;
static int nproc;
#define PUTS 0
#define GETS 1
#define ACCS 2
#define MAX_MESSAGE_SIZE 1024*1024
#define MEDIUM_MESSAGE_SIZE 8192
#define ITER_SMALL 100
#define ITER_LARGE 10
#define WARMUP 2
static void fill_array(double *arr, int count, int which);
static void strided_test(size_t buffer_size, int op);
double dclock()
{
struct timeval tv;
gettimeofday(&tv, NULL);
return(tv.tv_sec * 1.0e6 + (double)tv.tv_usec);
}
int main(int argc, char **argv)
{
comex_init_args(&argc, &argv);
comex_group_rank(COMEX_GROUP_WORLD, &me);
comex_group_size(COMEX_GROUP_WORLD, &nproc);
/* This test only works for two processes */
assert(nproc == 2);
if (0 == me) {
printf("msg size (bytes) avg time (us) avg b/w (MB/sec)\n");
}
if (0 == me) {
printf("\n\n");
printf("#PNNL ComEx Put Strided Test\n");
}
strided_test(MAX_MESSAGE_SIZE, PUTS);
if (0 == me) {
printf("\n\n");
printf("#PNNL ComEx Get Strided Test\n");
}
strided_test(MAX_MESSAGE_SIZE, GETS);
if (0 == me) {
printf("\n\n");
printf("#PNNL ComEx Accumulate Strided Test\n");
}
strided_test(MAX_MESSAGE_SIZE, ACCS);
comex_finalize();
MPI_Finalize();
return 0;
}
static void fill_array(double *arr, int count, int which)
{
int i;
for (i = 0; i < count; i++) {
arr[i] = i;
}
}
static void strided_test(size_t buffer_size, int op)
{
void **dst_ptr;
void **put_buf;
void **get_buf;
double *times;
stats_t stats_latency;
stats_t stats_bandwidth;
stats_clear(&stats_latency);
stats_clear(&stats_bandwidth);
dst_ptr = (void*)malloc(nproc * sizeof(void*));
put_buf = (void*)malloc(nproc * sizeof(void*));
get_buf = (void*)malloc(nproc * sizeof(void*));
times = (double*)malloc(nproc * sizeof(double));
comex_malloc(dst_ptr, buffer_size, COMEX_GROUP_WORLD);
comex_malloc(put_buf, buffer_size, COMEX_GROUP_WORLD);
comex_malloc(get_buf, buffer_size, COMEX_GROUP_WORLD);
/* initialize what we're putting */
fill_array((double*)put_buf[me], buffer_size/sizeof(double), me);
size_t msg_size;
int dst = 1;
double scale = 1;
/* Information for strided data transfer */
int levels = 1;
int count[2];
int stride[1];
size_t xdim, ydim;
for (msg_size = 16; msg_size <= buffer_size; msg_size *= 2) {
int j;
int iter = msg_size > MEDIUM_MESSAGE_SIZE ? ITER_LARGE : ITER_SMALL;
for (xdim = 8; xdim <= msg_size; xdim *=2 ) {
ydim = msg_size / xdim;
count[0] = xdim;
count[1] = ydim;
stride[0] = xdim;
double t_start, t_end;
if (0 == me) {
for (j= 0; j < iter + WARMUP; ++j) {
if (WARMUP == j) {
t_start = dclock();
}
switch (op) {
case PUTS:
comex_puts(put_buf[me], stride, dst_ptr[dst], stride,
count, levels, dst, COMEX_GROUP_WORLD);
break;
case GETS:
comex_gets(dst_ptr[dst], stride, get_buf[me], stride,
count, levels, dst, COMEX_GROUP_WORLD);
break;
case ACCS:
comex_accs(COMEX_ACC_DBL, (void *)&scale,
put_buf[me], stride, dst_ptr[dst], stride,
count, levels, dst, COMEX_GROUP_WORLD);
break;
default:
comex_error("oops", 1);
}
}
}
comex_barrier(COMEX_GROUP_WORLD);
/* calculate total time and average time */
t_end = dclock();
if (0 == me) {
double latency = (t_end-t_start)/iter;
double bandwidth = msg_size*(nproc-1)*iter/(t_end-t_start);
printf("%5zu\t\t%6.2f\t\t%6.2f\t\t%zu\t\t%zu\n",
msg_size, latency, bandwidth, xdim, ydim);
stats_sample_value(&stats_latency, latency);
stats_sample_value(&stats_bandwidth, bandwidth);
}
}
}
if (0 == me) {
printf("Latency avg %6.2f +- %6.2f\n",
stats_latency._mean, stats_stddev(&stats_latency));
printf("Latency min %6.2f\n", stats_latency._min);
printf("Latency max %6.2f\n", stats_latency._max);
printf("Bandwidth avg %6.2f +- %6.2f\n",
stats_bandwidth._mean, stats_stddev(&stats_bandwidth));
printf("Bandwidth min %6.2f\n", stats_bandwidth._min);
printf("Bandwidth max %6.2f\n", stats_bandwidth._max);
}
comex_free(dst_ptr[me], COMEX_GROUP_WORLD);
comex_free(put_buf[me], COMEX_GROUP_WORLD);
comex_free(get_buf[me], COMEX_GROUP_WORLD);
free(dst_ptr);
free(put_buf);
free(get_buf);
free(times);
}
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