mirror of
https://develop.openfoam.com/Development/openfoam.git
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771 lines
19 KiB
C
771 lines
19 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2011-2012 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "mpi.h"
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#include "UPstream.H"
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#include "PstreamReduceOps.H"
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#include "OSspecific.H"
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#include "PstreamGlobals.H"
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#include "SubList.H"
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#include <cstring>
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#include <cstdlib>
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#include <csignal>
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#if defined(WM_SP)
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# define MPI_SCALAR MPI_FLOAT
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#elif defined(WM_DP)
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# define MPI_SCALAR MPI_DOUBLE
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#endif
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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typedef struct
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{
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scalar value;
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label count;
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} CountAndValue;
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void reduceSum
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(
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void *in,
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void *inOut,
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int *len,
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MPI_Datatype *dptr
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)
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{
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CountAndValue* inPtr =
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reinterpret_cast<CountAndValue*>(in);
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CountAndValue* inOutPtr =
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reinterpret_cast<CountAndValue*>(inOut);
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for (int i=0; i< *len; ++i)
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{
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inOutPtr->value += inPtr->value;
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inOutPtr->count += inPtr->count;
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inPtr++;
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inOutPtr++;
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}
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}
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// NOTE:
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// valid parallel options vary between implementations, but flag common ones.
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// if they are not removed by MPI_Init(), the subsequent argument processing
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// will notice that they are wrong
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void Foam::UPstream::addValidParOptions(HashTable<string>& validParOptions)
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{
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validParOptions.insert("np", "");
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validParOptions.insert("p4pg", "PI file");
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validParOptions.insert("p4wd", "directory");
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validParOptions.insert("p4amslave", "");
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validParOptions.insert("p4yourname", "hostname");
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validParOptions.insert("GAMMANP", "number of instances");
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validParOptions.insert("machinefile", "machine file");
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}
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bool Foam::UPstream::init(int& argc, char**& argv)
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{
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MPI_Init(&argc, &argv);
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int numprocs;
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MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
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MPI_Comm_rank(MPI_COMM_WORLD, &myProcNo_);
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if (debug)
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{
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Pout<< "UPstream::init : initialised with numProcs:" << numprocs
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<< " myProcNo:" << myProcNo_ << endl;
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}
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if (numprocs <= 1)
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{
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FatalErrorIn("UPstream::init(int& argc, char**& argv)")
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<< "bool IPstream::init(int& argc, char**& argv) : "
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"attempt to run parallel on 1 processor"
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<< Foam::abort(FatalError);
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}
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procIDs_.setSize(numprocs);
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forAll(procIDs_, procNo)
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{
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procIDs_[procNo] = procNo;
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}
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setParRun();
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# ifndef SGIMPI
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string bufferSizeName = getEnv("MPI_BUFFER_SIZE");
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if (bufferSizeName.size())
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{
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int bufferSize = atoi(bufferSizeName.c_str());
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if (bufferSize)
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{
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MPI_Buffer_attach(new char[bufferSize], bufferSize);
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}
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}
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else
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{
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FatalErrorIn("UPstream::init(int& argc, char**& argv)")
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<< "UPstream::init(int& argc, char**& argv) : "
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<< "environment variable MPI_BUFFER_SIZE not defined"
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<< Foam::abort(FatalError);
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}
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# endif
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int processorNameLen;
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char processorName[MPI_MAX_PROCESSOR_NAME];
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MPI_Get_processor_name(processorName, &processorNameLen);
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//signal(SIGABRT, stop);
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// Now that nprocs is known construct communication tables.
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initCommunicationSchedule();
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return true;
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}
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void Foam::UPstream::exit(int errnum)
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{
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if (debug)
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{
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Pout<< "UPstream::exit." << endl;
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}
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# ifndef SGIMPI
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int size;
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char* buff;
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MPI_Buffer_detach(&buff, &size);
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delete[] buff;
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# endif
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if (PstreamGlobals::outstandingRequests_.size())
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{
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label n = PstreamGlobals::outstandingRequests_.size();
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PstreamGlobals::outstandingRequests_.clear();
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WarningIn("UPstream::exit(int)")
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<< "There are still " << n << " outstanding MPI_Requests." << endl
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<< "This means that your code exited before doing a"
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<< " UPstream::waitRequests()." << endl
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<< "This should not happen for a normal code exit."
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<< endl;
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}
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if (errnum == 0)
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{
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MPI_Finalize();
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::exit(errnum);
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}
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else
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{
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MPI_Abort(MPI_COMM_WORLD, errnum);
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}
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}
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void Foam::UPstream::abort()
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{
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MPI_Abort(MPI_COMM_WORLD, 1);
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}
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void Foam::reduce(scalar& Value, const sumOp<scalar>& bop, const int tag)
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{
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if (Pstream::debug)
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{
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Pout<< "Foam::reduce : value:" << Value << endl;
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}
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if (!UPstream::parRun())
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{
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return;
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}
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if (UPstream::nProcs() <= UPstream::nProcsSimpleSum)
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{
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if (UPstream::master())
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{
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for
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(
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int slave=UPstream::firstSlave();
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slave<=UPstream::lastSlave();
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slave++
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)
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{
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scalar value;
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if
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(
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MPI_Recv
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(
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&value,
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1,
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MPI_SCALAR,
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UPstream::procID(slave),
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tag,
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MPI_COMM_WORLD,
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MPI_STATUS_IGNORE
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)
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)
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{
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FatalErrorIn
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(
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"reduce(scalar& Value, const sumOp<scalar>& sumOp)"
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) << "MPI_Recv failed"
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<< Foam::abort(FatalError);
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}
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Value = bop(Value, value);
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}
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}
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else
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{
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if
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(
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MPI_Send
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(
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&Value,
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1,
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MPI_SCALAR,
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UPstream::procID(UPstream::masterNo()),
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tag,
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MPI_COMM_WORLD
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)
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)
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{
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FatalErrorIn
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(
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"reduce(scalar& Value, const sumOp<scalar>& sumOp)"
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) << "MPI_Send failed"
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<< Foam::abort(FatalError);
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}
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}
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if (UPstream::master())
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{
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for
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(
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int slave=UPstream::firstSlave();
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slave<=UPstream::lastSlave();
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slave++
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)
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{
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if
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(
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MPI_Send
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(
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&Value,
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1,
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MPI_SCALAR,
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UPstream::procID(slave),
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tag,
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MPI_COMM_WORLD
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)
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)
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{
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FatalErrorIn
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(
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"reduce(scalar& Value, const sumOp<scalar>& sumOp)"
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) << "MPI_Send failed"
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<< Foam::abort(FatalError);
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}
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}
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}
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else
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{
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if
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(
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MPI_Recv
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(
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&Value,
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1,
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MPI_SCALAR,
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UPstream::procID(UPstream::masterNo()),
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tag,
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MPI_COMM_WORLD,
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MPI_STATUS_IGNORE
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)
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)
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{
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FatalErrorIn
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(
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"reduce(scalar& Value, const sumOp<scalar>& sumOp)"
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) << "MPI_Recv failed"
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<< Foam::abort(FatalError);
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}
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}
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}
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else
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{
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scalar sum;
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MPI_Allreduce(&Value, &sum, 1, MPI_SCALAR, MPI_SUM, MPI_COMM_WORLD);
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Value = sum;
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}
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if (Pstream::debug)
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{
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Pout<< "Foam::reduce : reduced value:" << Value << endl;
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}
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}
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void Foam::reduce(vector2D& Value, const sumOp<vector2D>& bop, const int tag)
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{
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if (Pstream::debug)
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{
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Pout<< "Foam::reduce : value:" << Value << endl;
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}
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if (!UPstream::parRun())
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{
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return;
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}
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if (UPstream::nProcs() <= UPstream::nProcsSimpleSum)
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{
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if (UPstream::master())
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{
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for
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(
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int slave=UPstream::firstSlave();
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slave<=UPstream::lastSlave();
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slave++
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)
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{
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vector2D value;
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if
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(
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MPI_Recv
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(
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&value,
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2,
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MPI_SCALAR,
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UPstream::procID(slave),
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tag,
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MPI_COMM_WORLD,
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MPI_STATUS_IGNORE
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)
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)
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{
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FatalErrorIn
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(
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"reduce(vector2D& Value, const sumOp<vector2D>& sumOp)"
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) << "MPI_Recv failed"
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<< Foam::abort(FatalError);
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}
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Value = bop(Value, value);
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}
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}
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else
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{
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if
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(
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MPI_Send
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(
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&Value,
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2,
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MPI_SCALAR,
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UPstream::procID(UPstream::masterNo()),
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tag,
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MPI_COMM_WORLD
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)
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)
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{
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FatalErrorIn
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(
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"reduce(vector2D& Value, const sumOp<vector2D>& sumOp)"
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) << "MPI_Send failed"
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<< Foam::abort(FatalError);
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}
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}
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if (UPstream::master())
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{
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for
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(
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int slave=UPstream::firstSlave();
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slave<=UPstream::lastSlave();
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slave++
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)
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{
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if
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(
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MPI_Send
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(
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&Value,
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2,
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MPI_SCALAR,
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UPstream::procID(slave),
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tag,
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MPI_COMM_WORLD
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)
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)
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{
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FatalErrorIn
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(
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"reduce(vector2D& Value, const sumOp<vector2D>& sumOp)"
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) << "MPI_Send failed"
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<< Foam::abort(FatalError);
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}
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}
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}
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else
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{
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if
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(
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MPI_Recv
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(
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&Value,
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2,
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MPI_SCALAR,
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UPstream::procID(UPstream::masterNo()),
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tag,
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MPI_COMM_WORLD,
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MPI_STATUS_IGNORE
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)
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)
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{
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FatalErrorIn
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(
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"reduce(vector2D& Value, const sumOp<vector2D>& sumOp)"
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) << "MPI_Recv failed"
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<< Foam::abort(FatalError);
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}
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}
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}
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else
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{
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vector2D sum;
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MPI_Allreduce(&Value, &sum, 2, MPI_SCALAR, MPI_SUM, MPI_COMM_WORLD);
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Value = sum;
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}
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if (Pstream::debug)
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{
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Pout<< "Foam::reduce : reduced value:" << Value << endl;
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}
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}
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void Foam::sumReduce
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(
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scalar& Value,
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label& Count,
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const int tag
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)
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{
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static bool hasDataType_ = false;
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static MPI_Datatype mesg_mpi_strct_;
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static MPI_Op myOp_;
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if (Pstream::debug)
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{
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Pout<< "Foam::sumReduce : value:" << Value
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<< " count:" << Count << endl;
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}
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if (!UPstream::parRun())
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{
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return;
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}
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if (UPstream::nProcs() <= UPstream::nProcsSimpleSum)
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{
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reduce(Value, sumOp<scalar>(), tag);
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reduce(Count, sumOp<label>(), tag);
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}
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else
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{
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CountAndValue in,out;
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if (!hasDataType_)
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{
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int lengths[2];
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lengths[0] = 1;
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lengths[1] = 1;
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MPI_Datatype types[2];
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types[0] = MPI_DOUBLE;
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types[1] = MPI_INT;
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MPI_Aint addresses[2];
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MPI_Address(&in.value, &addresses[0]);
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MPI_Address(&in.count, &addresses[1]);
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MPI_Aint offsets[2];
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offsets[0] = 0;
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offsets[1] = addresses[1]-addresses[0];
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if
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(
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MPI_Type_create_struct
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(
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2,
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lengths,
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offsets,
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types,
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&mesg_mpi_strct_
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)
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)
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{
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FatalErrorIn("Foam::sumReduce()")
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<< "MPI_Type_create_struct" << abort(FatalError);
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}
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if (MPI_Type_commit(&mesg_mpi_strct_))
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{
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FatalErrorIn("Foam::sumReduce()")
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<< "MPI_Type_commit" << abort(FatalError);
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}
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if (MPI_Op_create(reduceSum, true, &myOp_))
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{
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FatalErrorIn("Foam::sumReduce()")
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<< "MPI_Op_create" << abort(FatalError);
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}
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hasDataType_ = true;
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}
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in.value = Value;
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in.count = Count;
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if
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(
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MPI_Allreduce
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(
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&in,
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&out,
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1,
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mesg_mpi_strct_,
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myOp_,
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MPI_COMM_WORLD
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)
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)
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{
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FatalErrorIn("Foam::sumReduce(..)")
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<< "Problem." << abort(FatalError);
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}
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Value = out.value;
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Count = out.count;
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}
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if (Pstream::debug)
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{
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Pout<< "Foam::reduce : reduced value:" << Value
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<< " reduced count:" << Count << endl;
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}
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}
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|
|
|
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void Foam::reduce
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(
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scalar& Value,
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const sumOp<scalar>& bop,
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const int tag,
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label& requestID
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)
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{
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#ifdef MPIX_COMM_TYPE_SHARED
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// Assume mpich2 with non-blocking collectives extensions. Once mpi3
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// is available this will change.
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MPI_Request request;
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scalar v = Value;
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MPIX_Ireduce
|
|
(
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&v,
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&Value,
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1,
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MPI_SCALAR,
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MPI_SUM,
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|
0, //root
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MPI_COMM_WORLD,
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&request
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);
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requestID = PstreamGlobals::outstandingRequests_.size();
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PstreamGlobals::outstandingRequests_.append(request);
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#else
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|
// Non-blocking not yet implemented in mpi
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reduce(Value, bop, tag);
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requestID = -1;
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#endif
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}
|
|
|
|
|
|
Foam::label Foam::UPstream::nRequests()
|
|
{
|
|
return PstreamGlobals::outstandingRequests_.size();
|
|
}
|
|
|
|
|
|
void Foam::UPstream::resetRequests(const label i)
|
|
{
|
|
if (i < PstreamGlobals::outstandingRequests_.size())
|
|
{
|
|
PstreamGlobals::outstandingRequests_.setSize(i);
|
|
}
|
|
}
|
|
|
|
|
|
void Foam::UPstream::waitRequests(const label start)
|
|
{
|
|
if (debug)
|
|
{
|
|
Pout<< "UPstream::waitRequests : starting wait for "
|
|
<< PstreamGlobals::outstandingRequests_.size()-start
|
|
<< " outstanding requests starting at " << start << endl;
|
|
}
|
|
|
|
if (PstreamGlobals::outstandingRequests_.size())
|
|
{
|
|
SubList<MPI_Request> waitRequests
|
|
(
|
|
PstreamGlobals::outstandingRequests_,
|
|
PstreamGlobals::outstandingRequests_.size() - start,
|
|
start
|
|
);
|
|
|
|
if
|
|
(
|
|
MPI_Waitall
|
|
(
|
|
waitRequests.size(),
|
|
waitRequests.begin(),
|
|
MPI_STATUSES_IGNORE
|
|
)
|
|
)
|
|
{
|
|
FatalErrorIn
|
|
(
|
|
"UPstream::waitRequests()"
|
|
) << "MPI_Waitall returned with error" << Foam::endl;
|
|
}
|
|
|
|
resetRequests(start);
|
|
}
|
|
|
|
if (debug)
|
|
{
|
|
Pout<< "UPstream::waitRequests : finished wait." << endl;
|
|
}
|
|
}
|
|
|
|
|
|
void Foam::UPstream::waitRequest(const label i)
|
|
{
|
|
if (debug)
|
|
{
|
|
Pout<< "UPstream::waitRequest : starting wait for request:" << i
|
|
<< endl;
|
|
}
|
|
|
|
if (i >= PstreamGlobals::outstandingRequests_.size())
|
|
{
|
|
FatalErrorIn
|
|
(
|
|
"UPstream::waitRequest(const label)"
|
|
) << "There are " << PstreamGlobals::outstandingRequests_.size()
|
|
<< " outstanding send requests and you are asking for i=" << i
|
|
<< nl
|
|
<< "Maybe you are mixing blocking/non-blocking comms?"
|
|
<< Foam::abort(FatalError);
|
|
}
|
|
|
|
int flag;
|
|
if
|
|
(
|
|
MPI_Wait
|
|
(
|
|
&PstreamGlobals::outstandingRequests_[i],
|
|
MPI_STATUS_IGNORE
|
|
)
|
|
)
|
|
{
|
|
FatalErrorIn
|
|
(
|
|
"UPstream::waitRequest()"
|
|
) << "MPI_Wait returned with error" << Foam::endl;
|
|
}
|
|
|
|
if (debug)
|
|
{
|
|
Pout<< "UPstream::waitRequest : finished wait for request:" << i
|
|
<< endl;
|
|
}
|
|
}
|
|
|
|
|
|
bool Foam::UPstream::finishedRequest(const label i)
|
|
{
|
|
if (debug)
|
|
{
|
|
Pout<< "UPstream::waitRequests : checking finishedRequest:" << i
|
|
<< endl;
|
|
}
|
|
|
|
if (i >= PstreamGlobals::outstandingRequests_.size())
|
|
{
|
|
FatalErrorIn
|
|
(
|
|
"UPstream::finishedRequest(const label)"
|
|
) << "There are " << PstreamGlobals::outstandingRequests_.size()
|
|
<< " outstanding send requests and you are asking for i=" << i
|
|
<< nl
|
|
<< "Maybe you are mixing blocking/non-blocking comms?"
|
|
<< Foam::abort(FatalError);
|
|
}
|
|
|
|
int flag;
|
|
MPI_Test
|
|
(
|
|
&PstreamGlobals::outstandingRequests_[i],
|
|
&flag,
|
|
MPI_STATUS_IGNORE
|
|
);
|
|
|
|
if (debug)
|
|
{
|
|
Pout<< "UPstream::waitRequests : finished finishedRequest:" << i
|
|
<< endl;
|
|
}
|
|
|
|
return flag != 0;
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|