std::unordered_map<int, smpi_key_elem> Comm::keyvals_;
int Comm::keyval_id_=0;
-Comm::Comm(MPI_Group group, MPI_Topology topo, int smp) : group_(group), topo_(topo),is_smp_comm_(smp)
+Comm::Comm(MPI_Group group, MPI_Topology topo, int smp, int in_id) : group_(group), topo_(topo),is_smp_comm_(smp), id_(in_id)
{
refcount_ = 1;
topoType_ = MPI_INVALID_TOPO;
non_uniform_map_ = nullptr;
leaders_map_ = nullptr;
is_blocked_ = 0;
+ info_ = MPI_INFO_NULL;
+ errhandler_ = MPI_ERRORS_ARE_FATAL;
+ static int global_id_=0;
+ //First creation of comm is done before SIMIX_run, so only do comms for others
+ if(in_id==MPI_UNDEFINED && smp==0 && this->rank()!=MPI_UNDEFINED ){
+ int id;
+ if(this->rank()==0){
+ id=global_id_;
+ global_id_++;
+ }
+ Colls::bcast(&id, 1, MPI_INT, 0, this);
+ XBT_DEBUG("Communicator %p has id %d", this, id);
+ id_=id;//only set here, as we don't want to change it in the middle of the bcast
+ Colls::barrier(this);
+ }
}
void Comm::destroy(Comm* comm)
}
}
}
+ //duplicate info if present
+ if(info_!=MPI_INFO_NULL)
+ (*newcomm)->info_ = new simgrid::smpi::Info(info_);
+ //duplicate errhandler
+ (*newcomm)->set_errhandler(errhandler_);
+ return ret;
+}
+
+int Comm::dup_with_info(MPI_Info info, MPI_Comm* newcomm){
+ int ret = dup(newcomm);
+ if(ret != MPI_SUCCESS)
+ return ret;
+ if((*newcomm)->info_!=MPI_INFO_NULL){
+ simgrid::smpi::Info::unref((*newcomm)->info_);
+ (*newcomm)->info_=MPI_INFO_NULL;
+ }
+ if(info != MPI_INFO_NULL){
+ (*newcomm)->info_=info;
+ }
return ret;
}
return group_->rank(s4u::Actor::self());
}
+int Comm::id()
+{
+ return id_;
+}
+
void Comm::get_name (char* name, int* len)
{
if (this == MPI_COMM_UNINITIALIZED){
{
if (this == MPI_COMM_UNINITIALIZED)
return smpi_process()->comm_world()->split(color, key);
- int system_tag = 123;
+ int system_tag = -123;
int* recvbuf;
MPI_Group group_root = nullptr;
}
}
-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 == SmpiPrivStrategies::MMAP) {
- // we need to switch as the called function may silently touch global variables
- smpi_switch_data_segment(s4u::Actor::self());
- }
- //identify neighbours in comm
+MPI_Comm Comm::find_intra_comm(int * leader){
//get the indices of all processes sharing the same simix host
auto& process_list = sg_host_self()->pimpl_->process_list_;
int intra_comm_size = 0;
i++;
}
}
+ *leader=min_index;
+ return new Comm(group_intra, nullptr, 1);
+}
+
+void Comm::init_smp(){
+ int leader = -1;
+ int i = 0;
+ 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 == SmpiPrivStrategies::MMAP) {
+ // we need to switch as the called function may silently touch global variables
+ smpi_switch_data_segment(s4u::Actor::self());
+ }
+ //identify neighbours in comm
+ MPI_Comm comm_intra = find_intra_comm(&leader);
- MPI_Comm comm_intra = new Comm(group_intra, nullptr, 1);
- leader=min_index;
int* leaders_map = new int[comm_size];
int* leader_list = new int[comm_size];
} else if(F2C::f2c_lookup() != nullptr && id >= 0) {
char key[KEY_SIZE];
const auto& lookup = F2C::f2c_lookup();
- auto comm = lookup->find(get_key_id(key, id));
+ auto comm = lookup->find(get_key(key, id));
return comm == lookup->end() ? MPI_COMM_NULL : static_cast<MPI_Comm>(comm->second);
} else {
return MPI_COMM_NULL;
void Comm::free_f(int id) {
char key[KEY_SIZE];
- F2C::f2c_lookup()->erase(id == 0 ? get_key(key, id) : get_key_id(key, id));
-}
-
-int Comm::add_f() {
- if(F2C::f2c_lookup()==nullptr){
- F2C::set_f2c_lookup(new std::unordered_map<std::string, F2C*>);
- }
- char key[KEY_SIZE];
- (*(F2C::f2c_lookup()))[this == MPI_COMM_WORLD ? get_key(key, F2C::f2c_id()) : get_key_id(key, F2C::f2c_id())] = this;
- f2c_id_increment();
- return F2C::f2c_id()-1;
+ F2C::f2c_lookup()->erase(get_key(key, id));
}
void Comm::add_rma_win(MPI_Win win){
info_=info;
}
+MPI_Errhandler Comm::errhandler(){
+ return errhandler_;
+}
+
+void Comm::set_errhandler(MPI_Errhandler errhandler){
+ errhandler_=errhandler;
+ if(errhandler_!= MPI_ERRHANDLER_NULL)
+ errhandler->ref();
+}
+
MPI_Comm Comm::split_type(int type, int /*key*/, MPI_Info)
{
- if(type != MPI_COMM_TYPE_SHARED){
+ //MPI_UNDEFINED can be given to some nodes... but we need them to still perform the smp part which is collective
+ if(type != MPI_COMM_TYPE_SHARED && type != MPI_UNDEFINED){
+ return MPI_COMM_NULL;
+ }
+ int leader=0;
+ MPI_Comm res= this->find_intra_comm(&leader);
+ if(type != MPI_UNDEFINED)
+ return res;
+ else{
+ Comm::destroy(res);
return MPI_COMM_NULL;
}
- this->init_smp();
- this->ref();
- this->get_intra_comm()->ref();
- return this->get_intra_comm();
}
} // namespace smpi
