mirror of
https://github.com/paboyle/Grid.git
synced 2024-11-14 17:55:38 +00:00
154 lines
4.9 KiB
C++
154 lines
4.9 KiB
C++
/*************************************************************************************
|
|
|
|
Grid physics library, www.github.com/paboyle/Grid
|
|
|
|
Source file: ./lib/communicator/SharedMemory.cc
|
|
|
|
Copyright (C) 2015
|
|
|
|
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
See the full license in the file "LICENSE" in the top level distribution directory
|
|
*************************************************************************************/
|
|
/* END LEGAL */
|
|
#pragma once
|
|
|
|
#include <Grid/GridCore.h>
|
|
|
|
#if defined (GRID_COMMS_MPI3)
|
|
#include <mpi.h>
|
|
#endif
|
|
#include <semaphore.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ipc.h>
|
|
#include <sys/shm.h>
|
|
#include <sys/mman.h>
|
|
#include <zlib.h>
|
|
#ifdef HAVE_NUMAIF_H
|
|
#include <numaif.h>
|
|
#endif
|
|
|
|
NAMESPACE_BEGIN(Grid);
|
|
|
|
#if defined (GRID_COMMS_MPI3)
|
|
typedef MPI_Comm Grid_MPI_Comm;
|
|
typedef MPI_Request CommsRequest_t;
|
|
#else
|
|
typedef int CommsRequest_t;
|
|
typedef int Grid_MPI_Comm;
|
|
#endif
|
|
|
|
class GlobalSharedMemory {
|
|
private:
|
|
static const int MAXLOG2RANKSPERNODE = 16;
|
|
|
|
// Init once lock on the buffer allocation
|
|
static int _ShmSetup;
|
|
static int _ShmAlloc;
|
|
static uint64_t _ShmAllocBytes;
|
|
|
|
public:
|
|
static int ShmSetup(void) { return _ShmSetup; }
|
|
static int ShmAlloc(void) { return _ShmAlloc; }
|
|
static uint64_t ShmAllocBytes(void) { return _ShmAllocBytes; }
|
|
static uint64_t MAX_MPI_SHM_BYTES;
|
|
static int Hugepages;
|
|
|
|
static std::vector<void *> WorldShmCommBufs;
|
|
|
|
static Grid_MPI_Comm WorldComm;
|
|
static int WorldRank;
|
|
static int WorldSize;
|
|
|
|
static Grid_MPI_Comm WorldShmComm;
|
|
static int WorldShmRank;
|
|
static int WorldShmSize;
|
|
|
|
static int WorldNodes;
|
|
static int WorldNode;
|
|
|
|
static std::vector<int> WorldShmRanks;
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////
|
|
// Create an optimal reordered communicator that makes MPI_Cart_create get it right
|
|
//////////////////////////////////////////////////////////////////////////////////////
|
|
static void Init(Grid_MPI_Comm comm); // Typically MPI_COMM_WORLD
|
|
static void OptimalCommunicator(const Coordinate &processors,Grid_MPI_Comm & optimal_comm); // Turns MPI_COMM_WORLD into right layout for Cartesian
|
|
///////////////////////////////////////////////////
|
|
// Provide shared memory facilities off comm world
|
|
///////////////////////////////////////////////////
|
|
static void SharedMemoryAllocate(uint64_t bytes, int flags);
|
|
static void SharedMemoryFree(void);
|
|
|
|
};
|
|
|
|
//////////////////////////////
|
|
// one per communicator
|
|
//////////////////////////////
|
|
class SharedMemory
|
|
{
|
|
private:
|
|
static const int MAXLOG2RANKSPERNODE = 16;
|
|
|
|
size_t heap_top;
|
|
size_t heap_bytes;
|
|
size_t heap_size;
|
|
|
|
protected:
|
|
|
|
Grid_MPI_Comm ShmComm; // for barriers
|
|
int ShmRank;
|
|
int ShmSize;
|
|
std::vector<void *> ShmCommBufs;
|
|
std::vector<int> ShmRanks;// Mapping comm ranks to Shm ranks
|
|
|
|
public:
|
|
SharedMemory() {};
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
// set the buffers & sizes
|
|
///////////////////////////////////////////////////////////////////////////////////////
|
|
void SetCommunicator(Grid_MPI_Comm comm);
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// For this instance ; disjoint buffer sets between splits if split grid
|
|
////////////////////////////////////////////////////////////////////////
|
|
void ShmBarrier(void);
|
|
|
|
///////////////////////////////////////////////////
|
|
// Call on any instance
|
|
///////////////////////////////////////////////////
|
|
void SharedMemoryTest(void);
|
|
void *ShmBufferSelf(void);
|
|
void *ShmBuffer (int rank);
|
|
void *ShmBufferTranslate(int rank,void * local_p);
|
|
void *ShmBufferMalloc(size_t bytes);
|
|
void ShmBufferFreeAll(void) ;
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Make info on Nodes & ranks and Shared memory available
|
|
//////////////////////////////////////////////////////////////////////////
|
|
int NodeCount(void) { return GlobalSharedMemory::WorldNodes;};
|
|
int RankCount(void) { return GlobalSharedMemory::WorldSize;};
|
|
|
|
};
|
|
|
|
NAMESPACE_END(Grid);
|
|
|