-/* Copyright (c) 2010-2021. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2010-2023. 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 <string>
simgrid::smpi::Group smpi_MPI_GROUP_EMPTY;
-extern XBT_PRIVATE MPI_Comm MPI_COMM_UNINITIALIZED;
-namespace simgrid{
-namespace smpi{
+namespace simgrid::smpi {
Group::Group(const Group* origin)
{
if (origin != MPI_GROUP_NULL && origin != MPI_GROUP_EMPTY) {
- // FIXME: cheinrich: There is no such thing as an index any more; the two maps should be removed
- index_to_rank_map_ = origin->index_to_rank_map_;
- rank_to_actor_map_ = origin->rank_to_actor_map_;
- actor_to_rank_map_ = origin->actor_to_rank_map_;
+ rank_to_pid_map_ = origin->rank_to_pid_map_;
+ pid_to_rank_map_ = origin->pid_to_rank_map_;
}
}
-void Group::set_mapping(s4u::Actor* actor, int rank)
+void Group::set_mapping(aid_t pid, int rank)
{
if (0 <= rank && rank < size()) {
- int index = actor->get_pid();
- if ((unsigned)index >= index_to_rank_map_.size())
- index_to_rank_map_.resize(index + 1, MPI_UNDEFINED);
- index_to_rank_map_[index] = rank;
- rank_to_actor_map_[rank] = actor;
- actor_to_rank_map_.insert({actor, rank});
+ if (static_cast<size_t>(pid) >= pid_to_rank_map_.size())
+ pid_to_rank_map_.resize(pid + 1, MPI_UNDEFINED);
+ rank_to_pid_map_[rank] = pid;
+ pid_to_rank_map_[pid] = rank;
}
}
-int Group::rank(int index) const
+int Group::rank(aid_t pid) const
{
- int rank;
- if (0 <= index && (unsigned)index < index_to_rank_map_.size())
- rank = index_to_rank_map_[index];
- else
- rank = MPI_UNDEFINED;
-
- return rank;
-}
-
-s4u::Actor* Group::actor(int rank) const
-{
- if (0 <= rank && rank < size())
- return rank_to_actor_map_[rank];
- else
- return nullptr;
+ int res = static_cast<size_t>(pid) < pid_to_rank_map_.size() ? pid_to_rank_map_[pid] : MPI_UNDEFINED;
+ if (res == MPI_UNDEFINED) {
+ // I'm not in the communicator ... but maybe my parent is?
+ if (auto parent = s4u::Actor::by_pid(pid)) {
+ aid_t ppid = parent->get_ppid();
+ res = static_cast<size_t>(ppid) < pid_to_rank_map_.size() ? pid_to_rank_map_[ppid] : MPI_UNDEFINED;
+ }
+ }
+ return res;
}
-int Group::rank(s4u::Actor* actor) const
+aid_t Group::actor(int rank) const
{
- auto iterator = actor_to_rank_map_.find(actor);
- //I'm not in the communicator ... but maybe my parent is ?
- if (iterator == actor_to_rank_map_.end())
- iterator = actor_to_rank_map_.find(s4u::Actor::by_pid(actor->get_ppid()).get());
- return (iterator == actor_to_rank_map_.end()) ? MPI_UNDEFINED : (*iterator).second;
+ return (0 <= rank && rank < size()) ? rank_to_pid_map_[rank] : -1;
}
void Group::ref()
}
}
-int Group::compare(MPI_Group group2) const
+int Group::compare(const Group* group2) const
{
int result;
*newgroup = new Group(n);
for (int i = 0; i < n; i++) {
- s4u::Actor* actor = this->actor(ranks[i]);
+ aid_t actor = this->actor(ranks[i]);
(*newgroup)->set_mapping(actor, i);
}
(*newgroup)->add_f();
return MPI_SUCCESS;
}
-int Group::group_union(MPI_Group group2, MPI_Group* newgroup) const
+int Group::incl(const std::vector<int>& ranks, MPI_Group* newgroup) const
+{
+ return incl(static_cast<int>(ranks.size()), ranks.data(), newgroup);
+}
+
+int Group::excl(const std::vector<bool>& excl_map, MPI_Group* newgroup) const
{
- std::vector<int> to_incl;
+ xbt_assert(static_cast<int>(excl_map.size()) == size());
+ std::vector<int> ranks;
+ for (int i = 0; i < static_cast<int>(excl_map.size()); i++)
+ if (not excl_map[i])
+ ranks.push_back(i);
+ return incl(static_cast<int>(ranks.size()), ranks.data(), newgroup);
+}
+
+int Group::group_union(const Group* group2, MPI_Group* newgroup) const
+{
+ std::vector<int> ranks2;
for (int i = 0; i < group2->size(); i++) {
- s4u::Actor* actor = group2->actor(i);
+ aid_t actor = group2->actor(i);
if (rank(actor) == MPI_UNDEFINED)
- to_incl.push_back(i);
+ ranks2.push_back(i);
}
- int newsize = size() + static_cast<int>(to_incl.size());
+ int newsize = size() + static_cast<int>(ranks2.size());
if (newsize == 0) {
*newgroup = MPI_GROUP_EMPTY;
return MPI_SUCCESS;
*newgroup = new Group(newsize);
int i;
for (i = 0; i < size(); i++) {
- s4u::Actor* actor1 = actor(i);
+ aid_t actor1 = actor(i);
(*newgroup)->set_mapping(actor1, i);
}
- for (int j : to_incl) {
- s4u::Actor* actor2 = group2->actor(j);
+ for (int j : ranks2) {
+ aid_t actor2 = group2->actor(j);
(*newgroup)->set_mapping(actor2, i);
i++;
}
return MPI_SUCCESS;
}
-int Group::intersection(MPI_Group group2, MPI_Group* newgroup) const
+int Group::intersection(const Group* group2, MPI_Group* newgroup) const
{
- std::vector<int> to_incl;
+ std::vector<int> ranks2;
for (int i = 0; i < group2->size(); i++) {
- s4u::Actor* actor = group2->actor(i);
+ aid_t actor = group2->actor(i);
if (rank(actor) != MPI_UNDEFINED)
- to_incl.push_back(i);
- }
-
- if (to_incl.empty()) {
- *newgroup = MPI_GROUP_EMPTY;
- return MPI_SUCCESS;
+ ranks2.push_back(i);
}
-
- int newsize = static_cast<int>(to_incl.size());
- *newgroup = new Group(newsize);
- for (int i = 0; i < newsize; i++) {
- s4u::Actor* actor = group2->actor(to_incl[i]);
- (*newgroup)->set_mapping(actor, i);
- }
- (*newgroup)->add_f();
- return MPI_SUCCESS;
+ return group2->incl(ranks2, newgroup);
}
-int Group::difference(MPI_Group group2, MPI_Group* newgroup) const
+int Group::difference(const Group* group2, MPI_Group* newgroup) const
{
- std::vector<int> to_incl;
+ std::vector<int> ranks;
for (int i = 0; i < size(); i++) {
- s4u::Actor* actor = this->actor(i);
+ aid_t actor = this->actor(i);
if (group2->rank(actor) == MPI_UNDEFINED)
- to_incl.push_back(i);
- }
-
- if (to_incl.empty()) {
- *newgroup = MPI_GROUP_EMPTY;
- return MPI_SUCCESS;
+ ranks.push_back(i);
}
-
- int newsize = static_cast<int>(to_incl.size());
- *newgroup = new Group(newsize);
- for (int i = 0; i < newsize; i++) {
- s4u::Actor* actor = group2->actor(to_incl[i]);
- (*newgroup)->set_mapping(actor, i);
- }
- (*newgroup)->add_f();
- return MPI_SUCCESS;
+ return this->incl(ranks, newgroup);
}
int Group::excl(int n, const int* ranks, MPI_Group* newgroup) const
{
- if (n == size()) {
- *newgroup = MPI_GROUP_EMPTY;
- return MPI_SUCCESS;
- }
-
std::vector<bool> to_excl(size(), false);
for (int i = 0; i < n; i++)
to_excl[ranks[i]] = true;
-
- int newsize = size() - n;
- *newgroup = new Group(newsize);
- int j = 0;
- for (int i = 0; i < size(); i++) {
- if (not to_excl[i]) {
- s4u::Actor* actor = this->actor(i);
- (*newgroup)->set_mapping(actor, j);
- j++;
- }
- }
- (*newgroup)->add_f();
- return MPI_SUCCESS;
+ return this->excl(to_excl, newgroup);
}
static bool is_rank_in_range(int rank, int first, int last)
return (first <= rank && rank <= last) || (first >= rank && rank >= last);
}
-int Group::range_incl(int n, int ranges[][3], MPI_Group* newgroup) const
+int Group::range_incl(int n, const int ranges[][3], MPI_Group* newgroup) const
{
- std::vector<int> to_incl;
- for (int i = 0; i < n; i++)
+ std::vector<int> ranks;
+ for (int i = 0; i < n; i++) {
for (int j = ranges[i][0]; j >= 0 && j < size() && is_rank_in_range(j, ranges[i][0], ranges[i][1]);
j += ranges[i][2])
- to_incl.push_back(j);
-
- if (to_incl.empty()) {
- *newgroup = MPI_GROUP_EMPTY;
- return MPI_SUCCESS;
- }
-
- int newsize = static_cast<int>(to_incl.size());
- *newgroup = new Group(newsize);
-
- for (int i = 0; i < newsize; i++) {
- s4u::Actor* actor = this->actor(to_incl[i]);
- (*newgroup)->set_mapping(actor, i);
+ ranks.push_back(j);
}
- (*newgroup)->add_f();
- return MPI_SUCCESS;
+ return this->incl(ranks, newgroup);
}
-int Group::range_excl(int n, int ranges[][3], MPI_Group* newgroup) const
+int Group::range_excl(int n, const int ranges[][3], MPI_Group* newgroup) const
{
std::vector<bool> to_excl(size(), false);
- int newsize = size();
for (int i = 0; i < n; i++) {
for (int j = ranges[i][0]; j >= 0 && j < size() && is_rank_in_range(j, ranges[i][0], ranges[i][1]);
- j += ranges[i][2]) {
+ j += ranges[i][2])
to_excl[j] = true;
- newsize--;
- }
- }
- if (newsize == 0) {
- *newgroup = MPI_GROUP_EMPTY;
- return MPI_SUCCESS;
- }
-
- *newgroup = new Group(newsize);
- int j = 0;
- for (int i = 0; i < size(); i++) {
- if (not to_excl[i]) {
- s4u::Actor* actor = this->actor(i);
- (*newgroup)->set_mapping(actor, j);
- j++;
- }
}
- (*newgroup)->add_f();
- return MPI_SUCCESS;
+ return this->excl(to_excl, newgroup);
}
MPI_Group Group::f2c(int id) {
}
}
-}
-}
+} // namespace simgrid::smpi
