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93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/communicator/SharedMemory.cc
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Copyright (C) 2015
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/GridCore.h>
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namespace Grid {
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// static data
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uint64_t GlobalSharedMemory::MAX_MPI_SHM_BYTES = 1024LL*1024LL*1024LL;
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int GlobalSharedMemory::Hugepages = 0;
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int GlobalSharedMemory::_ShmSetup;
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int GlobalSharedMemory::_ShmAlloc;
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uint64_t GlobalSharedMemory::_ShmAllocBytes;
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std::vector<void *> GlobalSharedMemory::WorldShmCommBufs;
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Grid_MPI_Comm GlobalSharedMemory::WorldShmComm;
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int GlobalSharedMemory::WorldShmRank;
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int GlobalSharedMemory::WorldShmSize;
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std::vector<int> GlobalSharedMemory::WorldShmRanks;
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Grid_MPI_Comm GlobalSharedMemory::WorldComm;
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int GlobalSharedMemory::WorldSize;
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int GlobalSharedMemory::WorldRank;
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int GlobalSharedMemory::WorldNodes;
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int GlobalSharedMemory::WorldNode;
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void GlobalSharedMemory::SharedMemoryFree(void)
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{
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assert(_ShmAlloc);
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assert(_ShmAllocBytes>0);
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for(int r=0;r<WorldShmSize;r++){
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munmap(WorldShmCommBufs[r],_ShmAllocBytes);
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}
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_ShmAlloc = 0;
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_ShmAllocBytes = 0;
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}
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/////////////////////////////////
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// Alloc, free shmem region
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/////////////////////////////////
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void *SharedMemory::ShmBufferMalloc(size_t bytes){
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// bytes = (bytes+sizeof(vRealD))&(~(sizeof(vRealD)-1));// align up bytes
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void *ptr = (void *)heap_top;
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heap_top += bytes;
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heap_bytes+= bytes;
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if (heap_bytes >= heap_size) {
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std::cout<< " ShmBufferMalloc exceeded shared heap size -- try increasing with --shm <MB> flag" <<std::endl;
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std::cout<< " Parameter specified in units of MB (megabytes) " <<std::endl;
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std::cout<< " Current value is " << (heap_size/(1024*1024)) <<std::endl;
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assert(heap_bytes<heap_size);
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}
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return ptr;
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}
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void SharedMemory::ShmBufferFreeAll(void) {
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heap_top =(size_t)ShmBufferSelf();
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heap_bytes=0;
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}
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void *SharedMemory::ShmBufferSelf(void)
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{
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return ShmCommBufs[ShmRank];
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}
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}
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