+++ /dev/null
-/* Copyright (c) 2010-2017. 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/s4u/Host.hpp"
-#include <climits>
-
-#include "src/simix/smx_private.h"
-#include "src/smpi/private.h"
-#include "src/smpi/private.hpp"
-#include "src/smpi/smpi_comm.hpp"
-#include "src/smpi/smpi_coll.hpp"
-#include "src/smpi/smpi_datatype.hpp"
-#include "src/smpi/smpi_process.hpp"
-#include "src/smpi/smpi_request.hpp"
-#include "src/smpi/smpi_status.hpp"
-#include "src/smpi/smpi_win.hpp"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_comm, smpi, "Logging specific to SMPI (comm)");
-
- simgrid::smpi::Comm mpi_MPI_COMM_UNINITIALIZED;
-MPI_Comm MPI_COMM_UNINITIALIZED=&mpi_MPI_COMM_UNINITIALIZED;
-
-/* Support for cartesian topology was added, but there are 2 other types of topology, graph et dist graph. In order to
- * support them, we have to add a field SMPI_Topo_type, and replace the MPI_Topology field by an union. */
-
-static int smpi_compare_rankmap(const void *a, const void *b)
-{
- const int* x = static_cast<const int*>(a);
- const int* y = static_cast<const int*>(b);
-
- if (x[1] < y[1]) {
- return -1;
- }
- if (x[1] == y[1]) {
- if (x[0] < y[0]) {
- return -1;
- }
- if (x[0] == y[0]) {
- return 0;
- }
- return 1;
- }
- return 1;
-}
-
-namespace simgrid{
-namespace smpi{
-
-std::unordered_map<int, smpi_key_elem> Comm::keyvals_;
-int Comm::keyval_id_=0;
-
-Comm::Comm(MPI_Group group, MPI_Topology topo) : group_(group), topo_(topo)
-{
- refcount_=1;
- topoType_ = MPI_INVALID_TOPO;
- intra_comm_ = MPI_COMM_NULL;
- leaders_comm_ = MPI_COMM_NULL;
- is_uniform_=1;
- non_uniform_map_ = nullptr;
- leaders_map_ = nullptr;
- is_blocked_=0;
-}
-
-void Comm::destroy(Comm* comm)
-{
- if (comm == MPI_COMM_UNINITIALIZED){
- Comm::destroy(smpi_process()->comm_world());
- return;
- }
- delete comm->topo_; // there's no use count on topos
- Comm::unref(comm);
-}
-
-int Comm::dup(MPI_Comm* newcomm){
- if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP){ //we need to switch as the called function may silently touch global variables
- smpi_switch_data_segment(smpi_process()->index());
- }
- MPI_Group cp = new Group(this->group());
- (*newcomm) = new Comm(cp, this->topo());
- int ret = MPI_SUCCESS;
-
- if (not attributes()->empty()) {
- int flag;
- void* value_out;
- for(auto it : *attributes()){
- smpi_key_elem elem = keyvals_.at(it.first);
- if (elem != nullptr && elem->copy_fn.comm_copy_fn != MPI_NULL_COPY_FN) {
- ret = elem->copy_fn.comm_copy_fn(this, it.first, nullptr, it.second, &value_out, &flag);
- if (ret != MPI_SUCCESS) {
- Comm::destroy(*newcomm);
- *newcomm = MPI_COMM_NULL;
- return ret;
- }
- if (flag){
- elem->refcount++;
- (*newcomm)->attributes()->insert({it.first, value_out});
- }
- }
- }
- }
- return ret;
-}
-
-MPI_Group Comm::group()
-{
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->group();
- return group_;
-}
-
-MPI_Topology Comm::topo() {
- return topo_;
-}
-
-int Comm::size()
-{
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->size();
- return group_->size();
-}
-
-int Comm::rank()
-{
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->rank();
- return group_->rank(smpi_process()->index());
-}
-
-void Comm::get_name (char* name, int* len)
-{
- if (this == MPI_COMM_UNINITIALIZED){
- smpi_process()->comm_world()->get_name(name, len);
- return;
- }
- if(this == MPI_COMM_WORLD) {
- strncpy(name, "WORLD",5);
- *len = 5;
- } else {
- *len = snprintf(name, MPI_MAX_NAME_STRING, "%p", this);
- }
-}
-
-void Comm::set_leaders_comm(MPI_Comm leaders){
- if (this == MPI_COMM_UNINITIALIZED){
- smpi_process()->comm_world()->set_leaders_comm(leaders);
- return;
- }
- leaders_comm_=leaders;
-}
-
-void Comm::set_intra_comm(MPI_Comm leaders){
- intra_comm_=leaders;
-}
-
-int* Comm::get_non_uniform_map(){
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->get_non_uniform_map();
- return non_uniform_map_;
-}
-
-int* Comm::get_leaders_map(){
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->get_leaders_map();
- return leaders_map_;
-}
-
-MPI_Comm Comm::get_leaders_comm(){
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->get_leaders_comm();
- return leaders_comm_;
-}
-
-MPI_Comm Comm::get_intra_comm(){
- if (this == MPI_COMM_UNINITIALIZED || this==MPI_COMM_WORLD)
- return smpi_process()->comm_intra();
- else return intra_comm_;
-}
-
-int Comm::is_uniform(){
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->is_uniform();
- return is_uniform_;
-}
-
-int Comm::is_blocked(){
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->is_blocked();
- return is_blocked_;
-}
-
-MPI_Comm Comm::split(int color, int key)
-{
- if (this == MPI_COMM_UNINITIALIZED)
- return smpi_process()->comm_world()->split(color, key);
- int system_tag = 123;
- int* recvbuf;
-
- MPI_Group group_root = nullptr;
- MPI_Group group_out = nullptr;
- MPI_Group group = this->group();
- int rank = this->rank();
- int size = this->size();
- /* Gather all colors and keys on rank 0 */
- int* sendbuf = xbt_new(int, 2);
- sendbuf[0] = color;
- sendbuf[1] = key;
- if(rank == 0) {
- recvbuf = xbt_new(int, 2 * size);
- } else {
- recvbuf = nullptr;
- }
- Coll_gather_default::gather(sendbuf, 2, MPI_INT, recvbuf, 2, MPI_INT, 0, this);
- xbt_free(sendbuf);
- /* Do the actual job */
- if(rank == 0) {
- MPI_Group* group_snd = xbt_new(MPI_Group, size);
- int* rankmap = xbt_new(int, 2 * size);
- for (int i = 0; i < size; i++) {
- if (recvbuf[2 * i] != MPI_UNDEFINED) {
- int count = 0;
- for (int j = i + 1; j < size; j++) {
- if(recvbuf[2 * i] == recvbuf[2 * j]) {
- recvbuf[2 * j] = MPI_UNDEFINED;
- rankmap[2 * count] = j;
- rankmap[2 * count + 1] = recvbuf[2 * j + 1];
- count++;
- }
- }
- /* Add self in the group */
- recvbuf[2 * i] = MPI_UNDEFINED;
- rankmap[2 * count] = i;
- rankmap[2 * count + 1] = recvbuf[2 * i + 1];
- count++;
- qsort(rankmap, count, 2 * sizeof(int), &smpi_compare_rankmap);
- group_out = new Group(count);
- if (i == 0) {
- group_root = group_out; /* Save root's group */
- }
- for (int j = 0; j < count; j++) {
- int index = group->index(rankmap[2 * j]);
- group_out->set_mapping(index, j);
- }
- MPI_Request* requests = xbt_new(MPI_Request, count);
- int reqs = 0;
- for (int j = 0; j < count; j++) {
- if(rankmap[2 * j] != 0) {
- group_snd[reqs]=new Group(group_out);
- requests[reqs] = Request::isend(&(group_snd[reqs]), 1, MPI_PTR, rankmap[2 * j], system_tag, this);
- reqs++;
- }
- }
- if(i != 0 && group_out != MPI_COMM_WORLD->group() && group_out != MPI_GROUP_EMPTY)
- Group::unref(group_out);
-
- Request::waitall(reqs, requests, MPI_STATUS_IGNORE);
- xbt_free(requests);
- }
- }
- xbt_free(recvbuf);
- xbt_free(rankmap);
- xbt_free(group_snd);
- group_out = group_root; /* exit with root's group */
- } else {
- if(color != MPI_UNDEFINED) {
- Request::recv(&group_out, 1, MPI_PTR, 0, system_tag, this, MPI_STATUS_IGNORE);
- } /* otherwise, exit with group_out == nullptr */
- }
- return group_out!=nullptr ? new Comm(group_out, nullptr) : MPI_COMM_NULL;
-}
-
-void Comm::ref(){
- if (this == MPI_COMM_UNINITIALIZED){
- smpi_process()->comm_world()->ref();
- return;
- }
- group_->ref();
- refcount_++;
-}
-
-void Comm::cleanup_smp(){
- if (intra_comm_ != MPI_COMM_NULL)
- Comm::unref(intra_comm_);
- if (leaders_comm_ != MPI_COMM_NULL)
- Comm::unref(leaders_comm_);
- if (non_uniform_map_ != nullptr)
- xbt_free(non_uniform_map_);
- if (leaders_map_ != nullptr)
- xbt_free(leaders_map_);
-}
-
-void Comm::unref(Comm* comm){
- if (comm == MPI_COMM_UNINITIALIZED){
- Comm::unref(smpi_process()->comm_world());
- return;
- }
- comm->refcount_--;
- Group::unref(comm->group_);
-
- if(comm->refcount_==0){
- comm->cleanup_smp();
- comm->cleanup_attr<Comm>();
- delete comm;
- }
-}
-
-static int compare_ints (const void *a, const void *b)
-{
- const int *da = static_cast<const int *>(a);
- const int *db = static_cast<const int *>(b);
-
- return static_cast<int>(*da > *db) - static_cast<int>(*da < *db);
-}
-
-void Comm::init_smp(){
- int leader = -1;
-
- if (this == MPI_COMM_UNINITIALIZED)
- smpi_process()->comm_world()->init_smp();
-
- int comm_size = this->size();
-
- // If we are in replay - perform an ugly hack
- // tell SimGrid we are not in replay for a while, because we need the buffers to be copied for the following calls
- bool replaying = false; //cache data to set it back again after
- if(smpi_process()->replaying()){
- replaying=true;
- smpi_process()->set_replaying(false);
- }
-
- if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP){ //we need to switch as the called function may silently touch global variables
- smpi_switch_data_segment(smpi_process()->index());
- }
- //identify neighbours in comm
- //get the indexes of all processes sharing the same simix host
- xbt_swag_t process_list = sg_host_self()->extension<simgrid::simix::Host>()->process_list;
- int intra_comm_size = 0;
- int min_index = INT_MAX; // the minimum index will be the leader
- smx_actor_t actor = nullptr;
- xbt_swag_foreach(actor, process_list)
- {
- int index = actor->pid - 1;
-
- if (this->group()->rank(index) != MPI_UNDEFINED) {
- intra_comm_size++;
- // the process is in the comm
- if (index < min_index)
- min_index = index;
- }
- }
- XBT_DEBUG("number of processes deployed on my node : %d", intra_comm_size);
- MPI_Group group_intra = new Group(intra_comm_size);
- int i = 0;
- actor = nullptr;
- xbt_swag_foreach(actor, process_list) {
- int index = actor->pid -1;
- if(this->group()->rank(index)!=MPI_UNDEFINED){
- group_intra->set_mapping(index, i);
- i++;
- }
- }
-
- MPI_Comm comm_intra = new Comm(group_intra, nullptr);
- leader=min_index;
-
- int * leaders_map= static_cast<int*>(xbt_malloc0(sizeof(int)*comm_size));
- int * leader_list= static_cast<int*>(xbt_malloc0(sizeof(int)*comm_size));
- for(i=0; i<comm_size; i++){
- leader_list[i]=-1;
- }
-
- Coll_allgather_mpich::allgather(&leader, 1, MPI_INT , leaders_map, 1, MPI_INT, this);
-
- if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP){ //we need to switch as the called function may silently touch global variables
- smpi_switch_data_segment(smpi_process()->index());
- }
-
- if(leaders_map_==nullptr){
- leaders_map_= leaders_map;
- }else{
- xbt_free(leaders_map);
- }
- int j=0;
- int leader_group_size = 0;
- for(i=0; i<comm_size; i++){
- int already_done=0;
- for(j=0;j<leader_group_size; j++){
- if(leaders_map_[i]==leader_list[j]){
- already_done=1;
- }
- }
- if(already_done==0){
- leader_list[leader_group_size]=leaders_map_[i];
- leader_group_size++;
- }
- }
- qsort(leader_list, leader_group_size, sizeof(int),compare_ints);
-
- MPI_Group leaders_group = new Group(leader_group_size);
-
- MPI_Comm leader_comm = MPI_COMM_NULL;
- if(MPI_COMM_WORLD!=MPI_COMM_UNINITIALIZED && this!=MPI_COMM_WORLD){
- //create leader_communicator
- for (i=0; i< leader_group_size;i++)
- leaders_group->set_mapping(leader_list[i], i);
- leader_comm = new Comm(leaders_group, nullptr);
- this->set_leaders_comm(leader_comm);
- this->set_intra_comm(comm_intra);
-
- //create intracommunicator
- }else{
- for (i=0; i< leader_group_size;i++)
- leaders_group->set_mapping(leader_list[i], i);
-
- if(this->get_leaders_comm()==MPI_COMM_NULL){
- leader_comm = new Comm(leaders_group, nullptr);
- this->set_leaders_comm(leader_comm);
- }else{
- leader_comm=this->get_leaders_comm();
- Group::unref(leaders_group);
- }
- smpi_process()->set_comm_intra(comm_intra);
- }
-
- // Are the nodes uniform ? = same number of process/node
- int my_local_size=comm_intra->size();
- if(comm_intra->rank()==0) {
- int is_uniform = 1;
- int* non_uniform_map = xbt_new0(int,leader_group_size);
- Coll_allgather_mpich::allgather(&my_local_size, 1, MPI_INT,
- non_uniform_map, 1, MPI_INT, leader_comm);
- for(i=0; i < leader_group_size; i++) {
- if(non_uniform_map[0] != non_uniform_map[i]) {
- is_uniform = 0;
- break;
- }
- }
- if(is_uniform==0 && this->is_uniform()!=0){
- non_uniform_map_= non_uniform_map;
- }else{
- xbt_free(non_uniform_map);
- }
- is_uniform_=is_uniform;
- }
- Coll_bcast_mpich::bcast(&(is_uniform_),1, MPI_INT, 0, comm_intra );
-
- if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP){ //we need to switch as the called function may silently touch global variables
- smpi_switch_data_segment(smpi_process()->index());
- }
- // Are the ranks blocked ? = allocated contiguously on the SMP nodes
- int is_blocked=1;
- int prev=this->group()->rank(comm_intra->group()->index(0));
- for (i=1; i<my_local_size; i++){
- int that=this->group()->rank(comm_intra->group()->index(i));
- if(that!=prev+1){
- is_blocked=0;
- break;
- }
- prev = that;
- }
-
- int global_blocked;
- Coll_allreduce_default::allreduce(&is_blocked, &(global_blocked), 1, MPI_INT, MPI_LAND, this);
-
- if(MPI_COMM_WORLD==MPI_COMM_UNINITIALIZED || this==MPI_COMM_WORLD){
- if(this->rank()==0){
- is_blocked_=global_blocked;
- }
- }else{
- is_blocked_=global_blocked;
- }
- xbt_free(leader_list);
-
- if(replaying)
- smpi_process()->set_replaying(true);
-}
-
-MPI_Comm Comm::f2c(int id) {
- if(id == -2) {
- return MPI_COMM_SELF;
- } else if(id==0){
- return MPI_COMM_WORLD;
- } else if(F2C::f2c_lookup() != nullptr && id >= 0) {
- char key[KEY_SIZE];
- MPI_Comm tmp = static_cast<MPI_Comm>(xbt_dict_get_or_null(F2C::f2c_lookup(),get_key_id(key, id)));
- return tmp != nullptr ? tmp : MPI_COMM_NULL ;
- } else {
- return MPI_COMM_NULL;
- }
-}
-
-void Comm::free_f(int id) {
- char key[KEY_SIZE];
- xbt_dict_remove(F2C::f2c_lookup(), id==0? get_key(key, id) : get_key_id(key, id));
-}
-
-int Comm::add_f() {
- if(F2C::f2c_lookup()==nullptr){
- F2C::set_f2c_lookup(xbt_dict_new_homogeneous(nullptr));
- }
- char key[KEY_SIZE];
- xbt_dict_set(F2C::f2c_lookup(), this==MPI_COMM_WORLD? get_key(key, F2C::f2c_id()) : get_key_id(key,F2C::f2c_id()), this, nullptr);
- f2c_id_increment();
- return F2C::f2c_id()-1;
-}
-
-
-void Comm::add_rma_win(MPI_Win win){
- rma_wins_.push_back(win);
-}
-
-void Comm::remove_rma_win(MPI_Win win){
- rma_wins_.remove(win);
-}
-
-void Comm::finish_rma_calls(){
- for(auto it : rma_wins_){
- if(it->rank()==this->rank()){//is it ours (for MPI_COMM_WORLD)?
- int finished = it->finish_comms();
- XBT_DEBUG("Barrier for rank %d - Finished %d RMA calls",this->rank(), finished);
- }
- }
-}
-
-
-}
-}
-
-
