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rmamt_bw.c
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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (C) 2007 University of Chicago
* Copyright (c) 2016-2018 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2025 Google, LLC. All rights reserved.
* ****** SANDIA ADD YOUR COPYRIGHTS BEFORE RELEASE ******
* See COPYRIGHT notice in top-level directory.
*/
#include "rmamt_common.h"
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <strings.h>
#include <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/syscall.h>
#include <sys/types.h>
/* target-side functions for single window */
static void *runfunc_pscw (ArgStruct* a);
static void *runfunc_fence (ArgStruct* a);
/* origin-side window per thread functions */
static void *bw_put_lock_all_new (ArgStruct* a);
static void *bw_get_lock_all_new (ArgStruct* a);
static void *bw_put_fence_new (ArgStruct* a);
static void *bw_get_fence_new (ArgStruct* a);
static void *bw_put_lock_per_rank_new (ArgStruct* a);
static void *bw_get_lock_per_rank_new (ArgStruct* a);
static void *bw_put_flush_new (ArgStruct* a);
static void *bw_get_flush_new (ArgStruct* a);
static void *bw_put_pscw_new (ArgStruct* a);
static void *bw_get_pscw_new (ArgStruct* a);
static void *bw_put_flush_thread_new (ArgStruct* a);
static void *bw_get_flush_thread_new (ArgStruct* a);
static void *bw_put_flush_all_new (ArgStruct* a);
static void *bw_get_flush_all_new (ArgStruct* a);
static void *bw_put_flush_local_new (ArgStruct* a);
static void *bw_get_flush_local_new (ArgStruct* a);
static void *bw_put_flush_local_all_new (ArgStruct* a);
static void *bw_get_flush_local_all_new (ArgStruct* a);
static rmamt_fn_t rmamt_new_fns[RMAMT_OPERATIONS_MAX][RMAMT_SYNC_MAX] = {
[RMAMT_PUT] = {
[RMAMT_LOCK_ALL] = bw_put_lock_all_new,
[RMAMT_FENCE] = bw_put_fence_new,
[RMAMT_LOCK] = bw_put_lock_per_rank_new,
[RMAMT_FLUSH] = bw_put_flush_new,
[RMAMT_PSCW] = bw_put_pscw_new,
[RMAMT_ALL_FLUSH] = bw_put_flush_new,
[RMAMT_FLUSH_ALL] = bw_put_flush_all_new,
[RMAMT_FLUSH_LOCAL] = bw_put_flush_local_new,
[RMAMT_FLUSH_LOCAL_ALL] = bw_put_flush_local_all_new,
},
[RMAMT_GET] = {
[RMAMT_LOCK_ALL] = bw_get_lock_all_new,
[RMAMT_FENCE] = bw_get_fence_new,
[RMAMT_LOCK] = bw_get_lock_per_rank_new,
[RMAMT_FLUSH] = bw_get_flush_new,
[RMAMT_PSCW] = bw_get_pscw_new,
[RMAMT_ALL_FLUSH] = bw_get_flush_new,
[RMAMT_FLUSH_ALL] = bw_get_flush_all_new,
[RMAMT_FLUSH_LOCAL] = bw_get_flush_local_new,
[RMAMT_FLUSH_LOCAL_ALL] = bw_get_flush_local_all_new,
},
};
static ArgStruct args[MAX_THREADS];
static uint64_t thread_etimes[MAX_THREADS];
static char* tbufs[MAX_THREADS];
static char* obuf;
static MPI_Win win[MAX_THREADS];
static int64_t times[MAX_THREADS][256];
static uint64_t barrier_time;
int main(int argc,char *argv[])
{
MPI_Comm test_comm, leader_comm;
MPI_Group group = MPI_GROUP_NULL, comm_group;
int nprocs, provided, rank, rc;
pthread_t id[MAX_THREADS];
MPI_Request req;
int64_t win_size;
int win_count, pairs;
size_t max_size, min_size;
FILE *output_file = NULL;
MPI_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &provided);
if (provided != MPI_THREAD_MULTIPLE) {
printf("MPI Thread multiple support required to run this benchmark\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_T_init_thread (MPI_THREAD_MULTIPLE, &provided);
MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
if (nprocs & 1) {
printf("Run with a multiple of two MPI processes\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
pairs = nprocs >> 1;
/* create test communicator */
MPI_Comm_split (MPI_COMM_WORLD, rank & ~1, 0, &test_comm);
MPI_Comm_split (MPI_COMM_WORLD, (rank & 1) ? MPI_UNDEFINED : 0, 0, &leader_comm);
MPI_Comm_group (test_comm, &comm_group);
rmamt_parse_options ("rmamt_bw", argc, argv);
if (rmamt_output_file && 0 == rank) {
output_file = fopen (rmamt_output_file, "w");
if (NULL == output_file) {
fprintf (stderr, "Could not open %s for writing\n", rmamt_output_file);
MPI_Abort (MPI_COMM_WORLD, 1);
}
free (rmamt_output_file);
}
if (rmamt_bind_threads) {
rc = rmamt_bind_init ();
if (-1 == rc) {
printf ("***** WARNING: Thread binding requested but not available *****\n");
}
}
min_size = rmamt_min_size / rmamt_threads;
if (min_size < 1) {
min_size = 1;
}
max_size = rmamt_max_size / (rmamt_threads * pairs);
win_count = rmamt_win_per_thread ? rmamt_threads : 1;
win_size = rmamt_max_size / win_count;
obuf = rmamt_malloc (rmamt_max_size);
if (!obuf) {
printf("Cannot allocate buffer\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
for (int k = 0 ; k < rmamt_threads ; ++k) {
memset(obuf + max_size * k, (char)k%9+'0', max_size);
}
/* create windows */
for (int i = 0 ; i < win_count ; ++i) {
MPI_CHECK(MPI_Win_allocate (win_size, 1, MPI_INFO_NULL, test_comm,
tbufs + i, win + i));
if (win_size) {
memset (tbufs[i], '-', win_size);
}
}
if (RMAMT_PSCW == rmamt_sync) {
MPI_Group_incl (comm_group, 1, &(int){!(rank & 1)}, &group);
}
if (!(rank & 1)) {
if (!rank) {
printf ("##########################################\n");
printf ("# RMA-MT Bandwidth\n");
printf ("#\n");
printf ("# Operation: %s\n", rmamt_operation_strings[rmamt_operation]);
printf ("# Sync: %s\n", rmamt_sync_strings[rmamt_sync]);
printf ("# Thread count: %u\n", (unsigned) rmamt_threads);
printf ("# Number of MPI process pairs: %d\n", pairs);
printf ("# Iterations: %u\n", (unsigned) rmamt_iterations);
printf ("# Bind worker threads: %s\n", rmamt_bind_threads ? "yes" : "no");
printf ("# Number of windows: %u\n", rmamt_win_per_thread ? rmamt_threads : 1);
printf ("# Unique displacement per thread: %s\n", rmamt_unique_displacements ? "yes" : "no");
printf ("##########################################\n");
printf (" BpT(%i)\t BxT(%i)\tBandwidth(MiB/s)\tMessage_Rate(M/s)\n", rmamt_threads, rmamt_threads);
if (output_file) {
fprintf (output_file, "##########################################\n");
fprintf (output_file, "# RMA-MT Bandwidth\n");
fprintf (output_file, "#\n");
fprintf (output_file, "# Operation: %s\n", rmamt_operation_strings[rmamt_operation]);
fprintf (output_file, "# Sync: %s\n", rmamt_sync_strings[rmamt_sync]);
fprintf (output_file, "# Thread count: %u\n", (unsigned) rmamt_threads);
fprintf (output_file, "# Number of MPI process pairs: %d\n", pairs);
fprintf (output_file, "# Iterations: %u\n", (unsigned) rmamt_iterations);
fprintf (output_file, "# Bind worker threads: %s\n", rmamt_bind_threads ? "yes" : "no");
fprintf (output_file, "# Number of windows: %u\n", rmamt_win_per_thread ? rmamt_threads : 1);
fprintf (output_file, "# Unique displacement per thread: %s\n", rmamt_unique_displacements ? "yes" : "no");
fprintf (output_file, "##########################################\n");
fprintf (output_file, "BpT(%i),BxT(%i),Bandwidth(MiB/s),Message_Rate(M/s)\n", rmamt_threads, rmamt_threads);
}
}
thread_barrier_init (rmamt_threads);
/* attempt to measure barrier overhead to improve the quality of the benchmark as the number
* of MPI process pairs increases */
MPI_Barrier (leader_comm);
uint64_t start = time_getns ();
for (int i = 0 ; i < 100 ; ++i) {
MPI_Barrier (leader_comm);
}
barrier_time = (time_getns () - start) / 100;
for (int i = 0 ; i < rmamt_threads ; ++i) {
args[i].tid = i;
args[i].max_size = max_size;
args[i].min_size = min_size;
args[i].win = rmamt_win_per_thread ? win[i] : win[0];
args[i].group = group;
args[i].all_sync = (RMAMT_ALL_FLUSH == rmamt_sync) || (RMAMT_FENCE == rmamt_sync);
args[i].target = !(rank & 1);
args[i].comm = leader_comm;
args[i].do_init = (rmamt_win_per_thread || 0 == i);
args[i].do_sync = (args[i].all_sync || 0 == i);
args[i].base_displacement = (rmamt_unique_displacements && !rmamt_win_per_thread) ? i * max_size : 0;
pthread_create(id+i, NULL, (void *(*)(void *)) rmamt_new_fns[rmamt_operation][rmamt_sync], args+i);
}
for (int i = 0 ; i < rmamt_threads ; ++i) {
pthread_join(id[i], NULL);
}
for (uint64_t j = min_size, step = 0 ; j <= max_size ; j <<= 1, ++step) {
double speed = 0.0, msg_rate = 0.0;
for (int i = 0 ; i < rmamt_threads ; ++i) {
speed += ((double) (j * rmamt_iterations) * 953.67431640625) / (double) times[i][step];
msg_rate += ((double) (rmamt_iterations) * 1000000000.0) / (double) times[i][step];
}
MPI_Allreduce (MPI_IN_PLACE, &speed, 1, MPI_DOUBLE, MPI_SUM, leader_comm);
MPI_Allreduce (MPI_IN_PLACE, &msg_rate, 1, MPI_DOUBLE, MPI_SUM, leader_comm);
if (0 == rank) {
if (output_file) {
fprintf (output_file, "%lu,%lu,%lf,%lf\n", (unsigned long) j, (unsigned long) j * rmamt_threads,
speed, msg_rate);
}
printf ("%9lu\t%9lu\t%13.3lf\t\t%13.3lf\n", (unsigned long) j, (unsigned long) j * rmamt_threads,
speed, msg_rate);
}
}
if (rmamt_use_ibarrier) {
MPI_Ibarrier (MPI_COMM_WORLD, &req);
MPI_Wait (&req, MPI_STATUS_IGNORE);
} else {
MPI_Barrier (MPI_COMM_WORLD);
}
} else {
if (RMAMT_PSCW == rmamt_sync || RMAMT_FENCE == rmamt_sync) {
args[0].tid = 0;
args[0].max_size = max_size;
args[0].min_size = min_size;
args[0].group = group;
args[0].win = win[0];
args[0].group = group;
args[0].base_displacement = 0;
if (rmamt_win_per_thread) {
for (int i = 1 ; i < rmamt_threads ; ++i) {
args[i].tid = i;
args[i].max_size = max_size;
args[i].min_size = min_size;
args[i].group = group;
args[i].win = win[i];
args[i].group = group;
args[i].base_displacement = 0;
//printf("args[%u].tid = %u\n", i, arggs[i].tid);
if (RMAMT_PSCW == rmamt_sync) {
pthread_create(id+i, NULL, (void *(*)(void *)) runfunc_pscw, args + i);
} else {
pthread_create(id+i, NULL, (void *(*)(void *)) runfunc_fence, args + i);
}
}
}
if (RMAMT_PSCW == rmamt_sync) {
runfunc_pscw (args);
} else {
runfunc_fence (args);
}
if (rmamt_win_per_thread) {
for (int i = 1 ; i < rmamt_threads ; ++i) {
pthread_join(id[i], NULL);
}
}
}
if (rmamt_use_ibarrier) {
const struct timespec interval = {.tv_sec = rmamt_sleep_interval / 1000000000,
.tv_nsec = rmamt_sleep_interval % 1000000000};
int flag = 0;
MPI_Ibarrier (MPI_COMM_WORLD, &req);
do {
/* sleep for 10us to simulate a non-mpi workload */
nanosleep (&interval, NULL);
/* enter MPI. this will progress pt2pt type implementations */
MPI_Test (&req, &flag, MPI_STATUS_IGNORE);
} while (!flag);
} else {
MPI_Barrier (MPI_COMM_WORLD);
}
}
if (MPI_GROUP_NULL != group) {
MPI_Group_free (&group);
}
MPI_Group_free (&comm_group);
MPI_Barrier (MPI_COMM_WORLD);
if (output_file) {
fclose (output_file);
}
for (int i = 0 ; i < win_count ; ++i) {
MPI_CHECK(MPI_Win_free(win + i));
}
if (rmamt_bind_threads) {
rmamt_bind_finalize ();
}
rmamt_free (obuf, rmamt_max_size);
MPI_Comm_free (&test_comm);
if (MPI_COMM_NULL != leader_comm) {
MPI_Comm_free (&leader_comm);
}
MPI_T_finalize ();
MPI_Finalize();
return 0;
}
static void *runfunc_pscw (ArgStruct* a) {
MPI_Win twin = a->win;
size_t max_size = a->max_size;
size_t min_size = a->min_size;
MPI_Group group = a->group;
for (uint64_t j = min_size ; j <= max_size ; j <<= 1) {
MPI_Win_post (group, 0, twin);
MPI_Win_wait (twin);
MPI_Win_post (group, 0, twin);
MPI_Win_wait (twin);
}
return NULL;
}
static void *runfunc_fence (ArgStruct* a) {
MPI_Win twin = a->win;
size_t max_size = a->max_size;
size_t min_size = a->min_size;
MPI_Win_fence (MPI_MODE_NOPRECEDE, twin);
for (uint64_t j = min_size ; j <= max_size ; j <<= 1) {
MPI_Win_fence (0, twin);
MPI_Win_fence (0, twin);
}
return NULL;
}
#define DEFINE_ORIGIN_THREAD_FN(sync, type, fn, init_fn, start_sync, end_sync, fini_fn) \
static void *bw_ ## type ## _ ## sync ## _new (ArgStruct* a) { \
const int tid = (int) a->tid; \
uint64_t start, stop; \
size_t max_size = a->max_size; \
size_t min_size = a->min_size; \
int barrier_cycle = 0; \
\
if (rmamt_bind_threads) { \
rmamt_bind (tid); \
} \
\
thread_etimes[tid] = time_getns (); \
\
if (a->do_init) { \
init_fn; \
} \
\
for (uint32_t j = min_size, cycle = 0 ; j <= max_size ; j <<= 1, ++cycle) { \
if (a->do_sync) { \
start_sync; \
} \
\
thread_barrier (barrier_cycle++); \
\
for (int l = 0 ; l < RMAMT_WARMUP_ITERATIONS ; l++) { \
fn (obuf + tid * j, j, MPI_BYTE, a->target, \
a->base_displacement, j, MPI_BYTE, a->win); \
} \
\
if (!a->all_sync) { \
thread_barrier (barrier_cycle++); \
} \
\
if (a->do_sync) { \
end_sync; \
} \
\
if (0 == tid) { \
MPI_Barrier (a->comm); \
} \
\
thread_barrier (barrier_cycle++); \
\
start = time_getns (); \
\
if (a->do_sync) { \
start_sync; \
} \
\
thread_barrier (barrier_cycle++); \
\
for (int l = 0 ; l < rmamt_iterations ; l++) { \
fn (obuf + tid * j, j, MPI_BYTE, a->target, \
a->base_displacement, j, MPI_BYTE, a->win); \
} \
\
thread_barrier (barrier_cycle++); \
\
if (a->do_sync) { \
end_sync; \
} \
\
if (0 == tid) { \
MPI_Barrier (a->comm); \
} \
\
thread_barrier (barrier_cycle++); \
\
stop = time_getns (); \
\
times[tid][cycle] = stop - start - barrier_time; \
\
thread_barrier (barrier_cycle++); \
} \
\
if (a->do_init) { \
fini_fn; \
} \
\
return 0; \
}
DEFINE_ORIGIN_THREAD_FN(lock_all, put, MPI_Put, (void) 0, MPI_Win_lock_all (0, a->win), MPI_Win_unlock_all (a->win), (void) 0)
DEFINE_ORIGIN_THREAD_FN(lock_all, get, MPI_Get, (void) 0, MPI_Win_lock_all (0, a->win), MPI_Win_unlock_all (a->win), (void) 0)
DEFINE_ORIGIN_THREAD_FN(lock_per_rank, put, MPI_Put, (void) 0, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), MPI_Win_unlock (a->target, a->win),
(void) 0)
DEFINE_ORIGIN_THREAD_FN(lock_per_rank, get, MPI_Get, (void) 0, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), MPI_Win_unlock (a->target, a->win),
(void) 0)
DEFINE_ORIGIN_THREAD_FN(flush, put, MPI_Put, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush (a->target, a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(flush, get, MPI_Get, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush (a->target, a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(pscw, put, MPI_Put, (void) 0, MPI_Win_start (a->group, 0, a->win), MPI_Win_complete (a->win), (void) 0)
DEFINE_ORIGIN_THREAD_FN(pscw, get, MPI_Get, (void) 0, MPI_Win_start (a->group, 0, a->win), MPI_Win_complete (a->win), (void) 0)
DEFINE_ORIGIN_THREAD_FN(fence, put, MPI_Put, MPI_Win_fence (MPI_MODE_NOPRECEDE, a->win), (void) 0, MPI_Win_fence (0, a->win), (void) 0)
DEFINE_ORIGIN_THREAD_FN(fence, get, MPI_Get, MPI_Win_fence (MPI_MODE_NOPRECEDE, a->win), (void) 0, MPI_Win_fence (0, a->win), (void) 0)
DEFINE_ORIGIN_THREAD_FN(flush_all, put, MPI_Put, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush_all (a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(flush_all, get, MPI_Get, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush_all (a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(flush_local, put, MPI_Put, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush_local (a->target, a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(flush_local, get, MPI_Get, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush_local (a->target, a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(flush_local_all, put, MPI_Put, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush_local_all (a->win),
MPI_Win_unlock (a->target, a->win))
DEFINE_ORIGIN_THREAD_FN(flush_local_all, get, MPI_Get, MPI_Win_lock (MPI_LOCK_SHARED, a->target, 0, a->win), (void) 0, MPI_Win_flush_local_all (a->win),
MPI_Win_unlock (a->target, a->win))