SimGrid  3.14.159
Versatile Simulation of Distributed Systems
examples/msg/app-pmm/app-pmm.c
/* pmm - double broadcast parallel matrix multiplication */
/* Copyright (c) 2006-2016. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "simgrid/msg.h"
#include "xbt/matrix.h"
XBT_LOG_NEW_DEFAULT_CATEGORY(msg_pmm, "Messages specific for this msg example");
/* This example should always be executed using a deployment of GRID_SIZE * GRID_SIZE nodes. */
#define GRID_SIZE 3 /* Modify to adjust the grid's size */
#define NODE_MATRIX_SIZE 300 /* Amount of work done by each node*/
#define GRID_NUM_NODES GRID_SIZE * GRID_SIZE
#define MATRIX_SIZE NODE_MATRIX_SIZE * GRID_SIZE
#define MAILBOX_NAME_SIZE 10
#define NEIGHBOURS_COUNT GRID_SIZE - 1
/* The job sent to every node */
typedef struct s_node_job{
int row;
int col;
int nodes_in_row[NEIGHBOURS_COUNT];
int nodes_in_col[NEIGHBOURS_COUNT];
} s_node_job_t;
typedef s_node_job_t *node_job_t;
/* Structure for recovering results */
typedef struct s_result {
int row;
int col;
} s_result_t;
typedef s_result_t *result_t;
int node(int argc, char **argv);
static void create_jobs(xbt_matrix_t A, xbt_matrix_t B, node_job_t *jobs);
static void broadcast_jobs(node_job_t *jobs);
static node_job_t wait_job(int selfid);
static void broadcast_matrix(xbt_matrix_t M, int num_nodes, int *nodes);
static void get_sub_matrix(xbt_matrix_t *sM, int selfid);
static void receive_results(result_t *results);
static void task_cleanup(void *arg);
int node(int argc, char **argv)
{
char my_mbox[MAILBOX_NAME_SIZE];
node_job_t myjob;
node_job_t jobs[GRID_NUM_NODES];
xbt_matrix_t A = NULL;
xbt_matrix_t B = NULL;
xbt_matrix_t C = NULL;
result_t result;
xbt_assert(argc != 1, "Wrong number of arguments for this node");
/* Initialize the node's data-structures */
int myid = xbt_str_parse_int(argv[1], "Invalid ID received as first node parameter: %s");
snprintf(my_mbox, MAILBOX_NAME_SIZE - 1, "%d", myid);
xbt_matrix_t sC = xbt_matrix_double_new_zeros(NODE_MATRIX_SIZE, NODE_MATRIX_SIZE);
if (myid == 0){
/* Create the matrices to multiply and one to store the result */
A = xbt_matrix_double_new_id(MATRIX_SIZE, MATRIX_SIZE);
B = xbt_matrix_double_new_seq(MATRIX_SIZE, MATRIX_SIZE);
C = xbt_matrix_double_new_zeros(MATRIX_SIZE, MATRIX_SIZE);
/* Create the nodes' jobs */
create_jobs(A, B, jobs);
/* Get own job first */
myjob = jobs[0];
/* Broadcast the rest of the jobs to the other nodes */
broadcast_jobs(jobs + 1);
} else {
myjob = wait_job(myid);
}
/* Multiplication main-loop */
XBT_VERB("Start Multiplication's Main-loop");
for (int k=0; k < GRID_SIZE; k++){
if(k == myjob->col){
XBT_VERB("Broadcast sA(%d,%d) to row %d", myjob->row, k, myjob->row);
broadcast_matrix(myjob->A, NEIGHBOURS_COUNT, myjob->nodes_in_row);
}
if(k == myjob->row){
XBT_VERB("Broadcast sB(%d,%d) to col %d", k, myjob->col, myjob->col);
broadcast_matrix(myjob->B, NEIGHBOURS_COUNT, myjob->nodes_in_col);
}
if(myjob->row == k && myjob->col == k){
xbt_matrix_double_addmult(myjob->A, myjob->B, sC);
}else if(myjob->row == k){
get_sub_matrix(&sA, myid);
xbt_matrix_double_addmult(sA, myjob->B, sC);
}else if(myjob->col == k){
get_sub_matrix(&sB, myid);
xbt_matrix_double_addmult(myjob->A, sB, sC);
}else{
get_sub_matrix(&sA, myid);
get_sub_matrix(&sB, myid);
}
}
/* Node 0: gather the results and reconstruct the final matrix */
if(myid == 0){
int node;
result_t results[GRID_NUM_NODES] = {0};
XBT_VERB("Multiplication done.");
/* Get the result from the nodes in the GRID */
receive_results(results);
/* First add our results */
xbt_matrix_copy_values(C, sC, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE, 0, 0, 0, 0, NULL);
/* Reconstruct the rest of the result matrix */
for (node = 1; node < GRID_NUM_NODES; node++){
xbt_matrix_copy_values(C, results[node]->sC, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE,
NODE_MATRIX_SIZE * results[node]->row, NODE_MATRIX_SIZE * results[node]->col,
0, 0, NULL);
xbt_matrix_free(results[node]->sC);
xbt_free(results[node]);
}
//xbt_matrix_dump(C, "C:res", 0, xbt_matrix_dump_display_double);
/* The rest: return the result to node 0 */
}else{
msg_task_t task;
XBT_VERB("Multiplication done. Send the sub-result.");
result = xbt_new0(s_result_t, 1);
result->row = myjob->row;
result->col = myjob->col;
result->sC = xbt_matrix_new_sub(sC, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE, 0, 0, NULL);
task = MSG_task_create("result",100,100,result);
MSG_task_send(task, "0");
}
/* Clean up and finish*/
xbt_matrix_free(myjob->A);
xbt_matrix_free(myjob->B);
xbt_free(myjob);
return 0;
}
/*
* Broadcast the jobs to the nodes of the grid (except to node 0)
*/
static void broadcast_jobs(node_job_t *jobs)
{
char node_mbox[MAILBOX_NAME_SIZE];
msg_comm_t comms[GRID_NUM_NODES - 1] = {0};
XBT_VERB("Broadcast Jobs");
for (int node = 1; node < GRID_NUM_NODES; node++){
msg_task_t task = MSG_task_create("Job", 100, 100, jobs[node-1]);
snprintf(node_mbox, MAILBOX_NAME_SIZE - 1, "%d", node);
comms[node-1] = MSG_task_isend(task, node_mbox);
}
MSG_comm_waitall(comms, GRID_NUM_NODES-1, -1);
for (int node = 1; node < GRID_NUM_NODES; node++)
MSG_comm_destroy(comms[node - 1]);
}
static node_job_t wait_job(int selfid)
{
msg_task_t task = NULL;
char self_mbox[MAILBOX_NAME_SIZE];
snprintf(self_mbox, MAILBOX_NAME_SIZE - 1, "%d", selfid);
msg_error_t err = MSG_task_receive(&task, self_mbox);
xbt_assert(err == MSG_OK, "Error while receiving from %s (%d)", self_mbox, (int)err);
node_job_t job = (node_job_t)MSG_task_get_data(task);
XBT_VERB("Got Job (%d,%d)", job->row, job->col);
return job;
}
static void broadcast_matrix(xbt_matrix_t M, int num_nodes, int *nodes)
{
char node_mbox[MAILBOX_NAME_SIZE];
for(int node=0; node < num_nodes; node++){
snprintf(node_mbox, MAILBOX_NAME_SIZE - 1, "%d", nodes[node]);
xbt_matrix_t sM = xbt_matrix_new_sub(M, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE, 0, 0, NULL);
msg_task_t task = MSG_task_create("sub-matrix", 100, 100, sM);
MSG_task_dsend(task, node_mbox, task_cleanup);
XBT_DEBUG("sub-matrix sent to %s", node_mbox);
}
}
static void get_sub_matrix(xbt_matrix_t *sM, int selfid)
{
msg_task_t task = NULL;
char node_mbox[MAILBOX_NAME_SIZE];
XBT_VERB("Get sub-matrix");
snprintf(node_mbox, MAILBOX_NAME_SIZE - 1, "%d", selfid);
msg_error_t err = MSG_task_receive(&task, node_mbox);
xbt_assert(err == MSG_OK, "Error while receiving from %s (%d)", node_mbox, (int)err);
}
static void task_cleanup(void *arg){
msg_task_t task = (msg_task_t)arg;
}
int main(int argc, char *argv[])
{
MSG_init(&argc, argv);
const char *platform = "../../platforms/cluster.xml";
if (argc > 1)
platform = argv[1];
MSG_function_register("node", node);
for(int i = 0 ; i< 9; i++) {
char *hostname = bprintf("node-%d.acme.org", i);
char **argvF = xbt_new(char *, 3);
argvF[0] = xbt_strdup("node");
argvF[1] = bprintf("%d", i);
argvF[2] = NULL;
MSG_process_create_with_arguments("node", node, NULL, MSG_host_by_name(hostname), 2, argvF);
xbt_free(hostname);
}
XBT_INFO("Simulated time: %g", MSG_get_clock());
return res != MSG_OK;
}
static void create_jobs(xbt_matrix_t A, xbt_matrix_t B, node_job_t *jobs)
{
int row = 0;
int col = 0;
for (int node = 0; node < GRID_NUM_NODES; node++){
XBT_VERB("Create job %d", node);
jobs[node] = xbt_new0(s_node_job_t, 1);
jobs[node]->row = row;
jobs[node]->col = col;
/* Compute who are the nodes in the same row and column than the node receiving this job */
int k=0;
for (int j = 0; j < GRID_SIZE; j++) {
if (node != (GRID_SIZE * row) + j) {
jobs[node]->nodes_in_row[k] = (GRID_SIZE * row) + j;
k++;
}
}
k=0;
for (int j = 0; j < GRID_SIZE; j++) {
if (node != (GRID_SIZE * j) + col) {
jobs[node]->nodes_in_col[k] = (GRID_SIZE * j) + col;
k++;
}
}
/* Assign a sub matrix of A and B to the job */
jobs[node]->A =
xbt_matrix_new_sub(A, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE * row, NODE_MATRIX_SIZE * col, NULL);
jobs[node]->B =
xbt_matrix_new_sub(B, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE, NODE_MATRIX_SIZE * row, NODE_MATRIX_SIZE * col, NULL);
col++;
if (col >= GRID_SIZE){
col = 0;
row++;
}
}
}
static void receive_results(result_t *results) {
msg_comm_t comms[GRID_NUM_NODES-1] = {0};
msg_task_t tasks[GRID_NUM_NODES-1] = {0};
XBT_VERB("Receive Results.");
/* Get the result from the nodes in the GRID */
for (int node = 1; node < GRID_NUM_NODES; node++)
comms[node-1] = MSG_task_irecv(&tasks[node-1], "0");
MSG_comm_waitall(comms, GRID_NUM_NODES - 1, -1);
for (int node = 1; node < GRID_NUM_NODES; node++)
MSG_comm_destroy(comms[node - 1]);
/* Reconstruct the result matrix */
for (int node = 1; node < GRID_NUM_NODES; node++){
results[node] = (result_t)MSG_task_get_data(tasks[node-1]);
MSG_task_destroy(tasks[node-1]);
}
}