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Rework wait: own files, partial struct specialization
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| //@HEADER | ||
| // ************************************************************************ | ||
| // | ||
| // Kokkos v. 4.0 | ||
| // Copyright (2022) 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. | ||
| // | ||
| // Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions. | ||
| // See https://kokkos.org/LICENSE for license information. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
| // | ||
| //@HEADER | ||
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| #pragma once | ||
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| #include <KokkosComm/mpi/req.hpp> | ||
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| namespace KokkosComm::Impl { | ||
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| /* Enqueue a communication completion*/ | ||
| template <KokkosExecutionSpace ExecSpace> | ||
| struct Wait<ExecSpace, Mpi> { | ||
| Wait(const ExecSpace &space, Req<Mpi> req) { | ||
| // ensure that the execution space has completed all work before completing the communication | ||
| space.fence(); | ||
| MPI_Wait(&req.mpi_request(), MPI_STATUS_IGNORE); | ||
| for (auto &f : req.record_->postWaits_) { | ||
| f(); | ||
| } | ||
| req.record_->postWaits_.clear(); | ||
| } | ||
| }; | ||
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| template <KokkosExecutionSpace ExecSpace> | ||
| struct WaitAll<ExecSpace, Mpi> { | ||
| WaitAll(const ExecSpace &space, std::vector<Req<Mpi>> &reqs) { | ||
| // ensure that the execution space has completed all work before completing the communication | ||
| space.fence(); | ||
| for (Req<Mpi> &req : reqs) { | ||
| MPI_Wait(&req.mpi_request(), MPI_STATUS_IGNORE); | ||
| for (auto &f : req.record_->postWaits_) { | ||
| f(); | ||
| } | ||
| req.record_->postWaits_.clear(); | ||
| } | ||
| } | ||
| }; | ||
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| /* Returns the index of the request that completed */ | ||
| template <KokkosExecutionSpace ExecSpace> | ||
| struct WaitAny<ExecSpace, Mpi> { | ||
| static int execute(const ExecSpace &space, std::vector<Req<Mpi>> &reqs) { | ||
| if (reqs.empty()) { | ||
| return -1; | ||
| } | ||
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| // ensure that the execution space has completed all work before completing the communication | ||
| space.fence(); | ||
| while (true) { // wait until something is done | ||
| for (size_t i = 0; i < reqs.size(); ++i) { | ||
| int completed; | ||
| Req<Mpi> &req = reqs[i]; | ||
| MPI_Test(&(req.mpi_request()), &completed, MPI_STATUS_IGNORE); | ||
| if (completed) { | ||
| for (auto &f : req.record_->postWaits_) { | ||
| f(); | ||
| } | ||
| req.record_->postWaits_.clear(); | ||
| return i; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| }; | ||
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| } // namespace KokkosComm::Impl |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| //@HEADER | ||
| // ************************************************************************ | ||
| // | ||
| // Kokkos v. 4.0 | ||
| // Copyright (2022) 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. | ||
| // | ||
| // Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions. | ||
| // See https://kokkos.org/LICENSE for license information. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
| // | ||
| //@HEADER | ||
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| #pragma once | ||
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| #include <Kokkos_Core.hpp> | ||
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| #include "fwd.hpp" | ||
| #include "concepts.hpp" | ||
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| namespace KokkosComm { | ||
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| // FIXME: reverse order of these template params for automatic deduction | ||
| template <KokkosExecutionSpace ExecSpace, CommunicationSpace CommSpace> | ||
| void wait(const ExecSpace &space, Req<CommSpace> req) { | ||
| Impl::Wait<ExecSpace, CommSpace>(space, req); | ||
| } | ||
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| template <KokkosExecutionSpace ExecSpace, CommunicationSpace CommSpace> | ||
| void wait_all(const ExecSpace &space, std::vector<Req<Mpi>> &reqs) { | ||
| Impl::WaitAll<ExecSpace, CommSpace>(space, reqs); | ||
| } | ||
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| template <KokkosExecutionSpace ExecSpace, CommunicationSpace CommSpace> | ||
| int wait_any(const ExecSpace &space, std::vector<Req<Mpi>> &reqs) { | ||
| return Impl::WaitAny<ExecSpace, CommSpace>::execute(space, reqs); | ||
| } | ||
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| template <CommunicationSpace CommSpace> | ||
| inline void wait(Req<CommSpace> req) { | ||
| return wait<Kokkos::DefaultExecutionSpace, CommSpace>(Kokkos::DefaultExecutionSpace{}, req); | ||
| } | ||
| template <CommunicationSpace CommSpace> | ||
| inline void wait_all(std::vector<Req<CommSpace>> &reqs) { | ||
| wait_all<Kokkos::DefaultExecutionSpace, CommSpace>(Kokkos::DefaultExecutionSpace{}, reqs); | ||
| } | ||
| template <CommunicationSpace CommSpace> | ||
| inline int wait_any(std::vector<Req<CommSpace>> &reqs) { | ||
| return wait_any<Kokkos::DefaultExecutionSpace, CommSpace>(Kokkos::DefaultExecutionSpace{}, reqs); | ||
| } | ||
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| } // namespace KokkosComm |