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#2281: Typeless Rabensifner and small fixes to StateHolder
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| /* | ||
| //@HEADER | ||
| // ***************************************************************************** | ||
| // | ||
| // rabenseifner.impl.h | ||
| // DARMA/vt => Virtual Transport | ||
| // | ||
| // Copyright 2019-2021 National Technology & Engineering Solutions of Sandia, LLC | ||
| // (NTESS). Under the terms of Contract DE-NA0003525 with NTESS, the U.S. | ||
| // Government retains certain rights in this software. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are met: | ||
| // | ||
| // * Redistributions of source code must retain the above copyright notice, | ||
| // this list of conditions and the following disclaimer. | ||
| // | ||
| // * Redistributions in binary form must reproduce the above copyright notice, | ||
| // this list of conditions and the following disclaimer in the documentation | ||
| // and/or other materials provided with the distribution. | ||
| // | ||
| // * Neither the name of the copyright holder nor the names of its | ||
| // contributors may be used to endorse or promote products derived from this | ||
| // software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
| // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| // POSSIBILITY OF SUCH DAMAGE. | ||
| // | ||
| // Questions? Contact [email protected] | ||
| // | ||
| // ***************************************************************************** | ||
| //@HEADER | ||
| */ | ||
|
|
||
| #include "vt/collective/reduce/allreduce/rabenseifner.h" | ||
| #include "vt/configs/error/config_assert.h" | ||
|
|
||
| namespace vt::collective::reduce::allreduce { | ||
|
|
||
| Rabenseifner::Rabenseifner( | ||
| detail::StrongVrtProxy proxy, detail::StrongGroup group, size_t num_elems) | ||
| : collection_proxy_(proxy.get()), | ||
| local_num_elems_(num_elems), | ||
| nodes_(theGroup()->GetGroupNodes(group.get())), | ||
| num_nodes_(nodes_.size()), | ||
| this_node_(theContext()->getNode()), | ||
| num_steps_(static_cast<int32_t>(log2(num_nodes_))), | ||
| nprocs_pof2_(1 << num_steps_), | ||
| nprocs_rem_(num_nodes_ - nprocs_pof2_) { | ||
|
|
||
| auto const is_default_group = group.get() == default_group; | ||
| if (not is_default_group) { | ||
| auto it = std::find(nodes_.begin(), nodes_.end(), theContext()->getNode()); | ||
| vtAssert(it != nodes_.end(), "This node was not found in group nodes!"); | ||
|
|
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| this_node_ = it - nodes_.begin(); | ||
| } | ||
|
|
||
| is_even_ = this_node_ % 2 == 0; | ||
| is_part_of_adjustment_group_ = this_node_ < (2 * nprocs_rem_); | ||
| if (is_part_of_adjustment_group_) { | ||
| if (is_even_) { | ||
| vrt_node_ = this_node_ / 2; | ||
| } else { | ||
| vrt_node_ = -1; | ||
| } | ||
| } else { | ||
| vrt_node_ = this_node_ - nprocs_rem_; | ||
| } | ||
|
|
||
| vt_debug_print( | ||
| terse, allreduce, | ||
| "Rabenseifner (this={}): proxy={:x} proxy_={} local_num_elems={}\n", | ||
| print_ptr(this), proxy.get(), proxy_.getProxy(), local_num_elems_); | ||
| } | ||
|
|
||
| Rabenseifner::Rabenseifner( | ||
| detail::StrongGroup group) | ||
| : group_(group.get()), | ||
| local_num_elems_(1), | ||
| nodes_(theGroup()->GetGroupNodes(group.get())), | ||
| num_nodes_(nodes_.size()), | ||
| this_node_(theContext()->getNode()), | ||
| num_steps_(static_cast<int32_t>(log2(num_nodes_))), | ||
| nprocs_pof2_(1 << num_steps_), | ||
| nprocs_rem_(num_nodes_ - nprocs_pof2_) { | ||
| std::string nodes_info; | ||
| for (auto& node : nodes_) { | ||
| nodes_info += fmt::format("{} ", node); | ||
| } | ||
| auto const is_default_group = group.get() == default_group; | ||
| auto const is_part_of_allreduce = | ||
| (not is_default_group and theGroup()->inGroup(group.get())) or | ||
| is_default_group; | ||
|
|
||
| vt_debug_print( | ||
| terse, allreduce, | ||
| "Rabenseifner: is_default_group={} is_part_of_allreduce={} num_nodes_={} " | ||
| "Nodes:[{}]\n", | ||
| is_default_group, is_part_of_allreduce, num_nodes_, nodes_info); | ||
|
|
||
| if (not is_default_group and theGroup()->inGroup(group.get())) { | ||
| auto it = std::find(nodes_.begin(), nodes_.end(), theContext()->getNode()); | ||
| vtAssert(it != nodes_.end(), "This node was not found in group nodes!"); | ||
|
|
||
| // index in group list | ||
| this_node_ = it - nodes_.begin(); | ||
| } | ||
|
|
||
| // We collectively create this Reducer, so it's possible that not all Nodes are part of it | ||
| if (is_part_of_allreduce) { | ||
| is_even_ = this_node_ % 2 == 0; | ||
| is_part_of_adjustment_group_ = this_node_ < (2 * nprocs_rem_); | ||
| if (is_part_of_adjustment_group_) { | ||
| if (is_even_) { | ||
| vrt_node_ = this_node_ / 2; | ||
| } else { | ||
| vrt_node_ = -1; | ||
| } | ||
| } else { | ||
| vrt_node_ = this_node_ - nprocs_rem_; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| Rabenseifner::Rabenseifner(detail::StrongObjGroup objgroup) | ||
| : objgroup_proxy_(objgroup.get()), | ||
| local_num_elems_(1), | ||
| nodes_(theGroup()->GetGroupNodes(default_group)), | ||
| num_nodes_(nodes_.size()), | ||
| this_node_(theContext()->getNode()), | ||
| num_steps_(static_cast<int32_t>(log2(num_nodes_))), | ||
| nprocs_pof2_(1 << num_steps_), | ||
| nprocs_rem_(num_nodes_ - nprocs_pof2_) { | ||
| std::string nodes_info; | ||
| for (auto& node : nodes_) { | ||
| nodes_info += fmt::format("{} ", node); | ||
| } | ||
|
|
||
| vt_debug_print( | ||
| terse, allreduce, | ||
| "Rabenseifner: is_default_group={} is_part_of_allreduce={} num_nodes_={} " | ||
| "Nodes:[{}]\n", | ||
| true, true, num_nodes_, nodes_info); | ||
|
|
||
| // We collectively create this Reducer, so it's possible that not all Nodes are part of it | ||
| is_even_ = this_node_ % 2 == 0; | ||
| is_part_of_adjustment_group_ = this_node_ < (2 * nprocs_rem_); | ||
| if (is_part_of_adjustment_group_) { | ||
| if (is_even_) { | ||
| vrt_node_ = this_node_ / 2; | ||
| } else { | ||
| vrt_node_ = -1; | ||
| } | ||
| } else { | ||
| vrt_node_ = this_node_ - nprocs_rem_; | ||
| } | ||
| } | ||
|
|
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| Rabenseifner::~Rabenseifner() { | ||
| if (collection_proxy_ != u64empty) { | ||
| StateHolder::clearAll(detail::StrongVrtProxy{collection_proxy_}); | ||
| } else if (objgroup_proxy_ != u64empty) { | ||
| StateHolder::clearAll(detail::StrongObjGroup{objgroup_proxy_}); | ||
| } else { | ||
| StateHolder::clearAll(detail::StrongGroup{group_}); | ||
| } | ||
| } | ||
|
|
||
| } // namespace vt::collective::reduce::allreduce |
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