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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include "mpitest.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <time.h>
#include <math.h>
#include <assert.h>
/* FIXME: What is this test supposed to accomplish? */
#define START_BUF (1)
#define LARGE_BUF (256 * 1024)
/* FIXME: MAX_BUF is too large */
#define MAX_BUF (128 * 1024 * 1024)
#define LOOPS 10
char *sbuf, *rbuf;
int *recvcounts, *displs;
int errs = 0;
typedef enum {
REGULAR,
BCAST,
SPIKE,
HALF_FULL,
LINEAR_DECREASE,
BELL_CURVE
} test_t;
void comm_tests(MPI_Comm comm);
double run_test(long long msg_size, MPI_Comm comm, test_t test_type, double *max_time);
int main(int argc, char **argv)
{
int comm_size, comm_rank;
MPI_Comm comm;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &comm_size);
MPI_Comm_rank(MPI_COMM_WORLD, &comm_rank);
if (comm_size < 3) {
fprintf(stderr, "At least 3 processes required\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
if (LARGE_BUF * comm_size > MAX_BUF)
goto fn_exit;
sbuf = (void *) calloc(MAX_BUF, 1);
rbuf = (void *) calloc(MAX_BUF, 1);
srand(time(NULL));
recvcounts = (void *) malloc(comm_size * sizeof(int));
displs = (void *) malloc(comm_size * sizeof(int));
if (!recvcounts || !displs || !sbuf || !rbuf) {
fprintf(stderr, "Unable to allocate memory:\n");
if (!sbuf)
fprintf(stderr, "\tsbuf of %d bytes\n", MAX_BUF);
if (!rbuf)
fprintf(stderr, "\trbuf of %d bytes\n", MAX_BUF);
if (!recvcounts)
fprintf(stderr, "\trecvcounts of %zd bytes\n", comm_size * sizeof(int));
if (!displs)
fprintf(stderr, "\tdispls of %zd bytes\n", comm_size * sizeof(int));
fflush(stderr);
MPI_Abort(MPI_COMM_WORLD, -1);
}
if (!comm_rank) {
MTestPrintfMsg(1, "Message Range: (%d, %d); System size: %d\n", START_BUF, LARGE_BUF,
comm_size);
}
/* COMM_WORLD tests */
if (!comm_rank) {
MTestPrintfMsg(1, "\n\n==========================================================\n");
MTestPrintfMsg(1, " MPI_COMM_WORLD\n");
MTestPrintfMsg(1, "==========================================================\n");
}
comm_tests(MPI_COMM_WORLD);
/* non-COMM_WORLD tests */
if (!comm_rank) {
MTestPrintfMsg(1, "\n\n==========================================================\n");
MTestPrintfMsg(1, " non-COMM_WORLD\n");
MTestPrintfMsg(1, "==========================================================\n");
}
MPI_Comm_split(MPI_COMM_WORLD, (comm_rank == comm_size - 1) ? 0 : 1, 0, &comm);
if (comm_rank < comm_size - 1)
comm_tests(comm);
MPI_Comm_free(&comm);
/* Randomized communicator tests */
if (!comm_rank) {
MTestPrintfMsg(1, "\n\n==========================================================\n");
MTestPrintfMsg(1, " Randomized Communicator\n");
MTestPrintfMsg(1, "==========================================================\n");
}
MPI_Comm_split(MPI_COMM_WORLD, 0, rand(), &comm);
comm_tests(comm);
MPI_Comm_free(&comm);
free(sbuf);
free(rbuf);
free(recvcounts);
free(displs);
fn_exit:
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
void comm_tests(MPI_Comm comm)
{
int comm_size, comm_rank;
double rtime, max_time;
long long msg_size;
MPI_Comm_size(comm, &comm_size);
MPI_Comm_rank(comm, &comm_rank);
for (msg_size = START_BUF; msg_size <= LARGE_BUF; msg_size *= 2) {
if (!comm_rank) {
MTestPrintfMsg(1, "\n====> MSG_SIZE: %d\n", (int) msg_size);
}
rtime = run_test(msg_size, comm, REGULAR, &max_time);
if (!comm_rank) {
MTestPrintfMsg(1, "REGULAR:\tAVG: %.3f\tMAX: %.3f\n", rtime, max_time);
}
rtime = run_test(msg_size, comm, BCAST, &max_time);
if (!comm_rank) {
MTestPrintfMsg(1, "BCAST:\tAVG: %.3f\tMAX: %.3f\n", rtime, max_time);
}
rtime = run_test(msg_size, comm, SPIKE, &max_time);
if (!comm_rank) {
MTestPrintfMsg(1, "SPIKE:\tAVG: %.3f\tMAX: %.3f\n", rtime, max_time);
}
rtime = run_test(msg_size, comm, HALF_FULL, &max_time);
if (!comm_rank) {
MTestPrintfMsg(1, "HALF_FULL:\tAVG: %.3f\tMAX: %.3f\n", rtime, max_time);
}
rtime = run_test(msg_size, comm, LINEAR_DECREASE, &max_time);
if (!comm_rank) {
MTestPrintfMsg(1, "LINEAR_DECREASE:\tAVG: %.3f\tMAX: %.3f\n", rtime, max_time);
}
rtime = run_test(msg_size, comm, BELL_CURVE, &max_time);
if (!comm_rank) {
MTestPrintfMsg(1, "BELL_CURVE:\tAVG: %.3f\tMAX: %.3f\n", rtime, max_time);
}
}
}
double run_test(long long msg_size, MPI_Comm comm, test_t test_type, double *max_time)
{
int i, j;
int comm_size, comm_rank;
double start, end;
double total_time, avg_time;
MPI_Aint tmp;
MPI_Comm_size(comm, &comm_size);
MPI_Comm_rank(comm, &comm_rank);
displs[0] = 0;
for (i = 0; i < comm_size; i++) {
if (test_type == REGULAR)
recvcounts[i] = msg_size;
else if (test_type == BCAST)
recvcounts[i] = (!i) ? msg_size : 0;
else if (test_type == SPIKE)
recvcounts[i] = (!i) ? (msg_size / 2) : (msg_size / (2 * (comm_size - 1)));
else if (test_type == HALF_FULL)
recvcounts[i] = (i < (comm_size / 2)) ? (2 * msg_size) : 0;
else if (test_type == LINEAR_DECREASE) {
tmp = 2 * msg_size * (comm_size - 1 - i) / (comm_size - 1);
if (tmp != (int) tmp) {
fprintf(stderr, "Integer overflow in variable tmp\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
recvcounts[i] = (int) tmp;
/* If the maximum message size is too large, don't run */
if (tmp > MAX_BUF)
return MTestReturnValue(errs);
} else if (test_type == BELL_CURVE) {
for (j = 0; j < i; j++) {
if (i - 1 + j >= comm_size)
continue;
tmp = msg_size * comm_size / (log(comm_size) * i);
recvcounts[i - 1 + j] = (int) tmp;
displs[i - 1 + j] = 0;
/* If the maximum message size is too large, don't run */
if (tmp > MAX_BUF)
return MTestReturnValue(errs);
}
}
if (i < comm_size - 1)
displs[i + 1] = displs[i] + recvcounts[i];
}
/* Test that:
* 1: sbuf is large enough
* 2: rbuf is large enough
* 3: There were no failures (e.g., tmp nowhere > rbuf size)
*/
MPI_Barrier(comm);
start = MPI_Wtime();
for (i = 0; i < LOOPS; i++) {
MPI_Allgatherv(sbuf, recvcounts[comm_rank], MPI_CHAR,
rbuf, recvcounts, displs, MPI_CHAR, comm);
}
end = MPI_Wtime();
MPI_Barrier(comm);
/* Convert to microseconds (why?) */
total_time = 1.0e6 * (end - start);
MPI_Reduce(&total_time, &avg_time, 1, MPI_DOUBLE, MPI_SUM, 0, comm);
MPI_Reduce(&total_time, max_time, 1, MPI_DOUBLE, MPI_MAX, 0, comm);
return (avg_time / (LOOPS * comm_size));
}
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