Edgar Gabriel
e4c427a736
* use dlsym for MPI functions to allow compiling without MPI support, convert the usage of MPI functions and symbols to be based on a dlopen/dlsym based mechanism. Turns out this cannot be done entirely vendor neutral, slightly different solutions might be required for Open MPI, MPICH and the new MPI ABI. * checkpoint more work to be done. * checkpoint 2 * checkpoint 3 * checkpoint 4 examples compile and link correctly * checkpoitn 5 (I think) * Checkpoitn 6 * dyld-mpi: adapt GDA * dyldmpi: tests that depend on MPI need to link with it themselves * do not ../mpi_instance.h * dyldmpi: make the symetricHeapTestFixture compile * dyldmpi: Change cmakery, compiles and run gda w/o external MPI * Make it also compile in external MPI mode * dyldmpi: ipc unit tests compile but do not link * dyldmpi: new approach, if external mpi required, link with mpi, otherwise use ompi5 abi * C-style comments in cmakelist.. * dyldmpi: examples: do not fail compiling if MPI not found at build time, instead do not compile the MPI required examples * more updates to CMake logic * convert RO backend and a few other cleanups * update some unit tests to work with the dlopen MPI environment correctly. --------- Co-authored-by: Aurelien Bouteiller <abouteil@amd.com>
98 lines
3.9 KiB
C++
98 lines
3.9 KiB
C++
/******************************************************************************
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* Copyright (c) Advanced Micro Devices, Inc. All rights reserved.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*****************************************************************************/
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#ifndef LIBRARY_SRC_HOST_HOST_HELPERS_HPP_
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#define LIBRARY_SRC_HOST_HOST_HELPERS_HPP_
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#include "host.hpp"
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#include "memory/window_info.hpp"
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#include "mpi_instance.hpp"
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#include <cassert>
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namespace rocshmem {
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__host__ inline MPI_Aint HostInterface::compute_offset(
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const void* dest, void* win_start, [[maybe_unused]] void* win_end) {
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assert((reinterpret_cast<char*>(const_cast<void*>(dest)) >=
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reinterpret_cast<char*>(win_start)) &&
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(reinterpret_cast<char*>(const_cast<void*>(dest)) <
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reinterpret_cast<char*>(win_end)));
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MPI_Aint dest_disp{};
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MPI_Aint start_disp{};
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mpilib_ftable_.Get_address(dest, &dest_disp);
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mpilib_ftable_.Get_address(win_start, &start_disp);
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return MPI_Aint_diff(dest_disp, start_disp);
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}
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__host__ inline void HostInterface::complete_all(MPI_Win win) {
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mpilib_ftable_.Win_flush_all(win); /* RMA operations */
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mpilib_ftable_.Win_sync(win); /* memory stores */
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}
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__host__ inline void HostInterface::initiate_put(void* dest, const void* source,
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size_t nelems, int pe,
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WindowInfoMPI* window_info) {
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MPI_Win win{window_info->get_win()};
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void* win_start{window_info->get_start()};
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void* win_end{window_info->get_end()};
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/* Calculate offset of remote dest from base address of window */
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MPI_Aint offset{compute_offset(dest, win_start, win_end)};
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/*
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* Current semantics of our API restrict the buffers
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* passed in to be on the symmetric heap only. So,
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* flush the HDP since the GPU may have written the
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* latest value to the source buffer and we want the
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* NIC to DMA read the latest value instead of the
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* value that may have been cached in the HDP.
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*/
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hdp_policy_->hdp_flush();
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/* Offload remote write operation to MPI */
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mpilib_ftable_.Put(source, nelems, MPI_CHAR, pe, offset, nelems, MPI_CHAR, win);
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}
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__host__ inline void HostInterface::initiate_get(void* dest, const void* source,
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size_t nelems, int pe,
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WindowInfoMPI* window_info) {
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MPI_Win win{window_info->get_win()};
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void* win_start{window_info->get_start()};
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void* win_end{window_info->get_end()};
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/* Calculate offset of remote source from base address of window */
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MPI_Aint offset = compute_offset(source, win_start, win_end);
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/* Offload remote fetch operation to MPI */
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mpilib_ftable_.Get(dest, nelems, MPI_CHAR, pe, offset, nelems, MPI_CHAR, win);
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}
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} // namespace rocshmem
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#endif // LIBRARY_SRC_HOST_HOST_HELPERS_HPP_
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