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/* |
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/* |
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* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
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* |
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* The University of Notre Dame grants you ("Licensee") a |
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int ParallelRandNumGen::nCreatedRNG_ = 0; |
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int ParallelRandNumGen::nCreatedRNG_ = 0; |
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ParallelRandNumGen::ParallelRandNumGen( const uint32& oneSeed) { |
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ParallelRandNumGen::ParallelRandNumGen( const uint32& oneSeed) { |
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const int masterNode = 0; |
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int seed = oneSeed; |
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MPI_Bcast(&seed, 1, MPI_UNSIGNED_LONG, masterNode, MPI_COMM_WORLD); |
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if (seed != oneSeed) { |
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sprintf(painCave.errMsg, |
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"Using different seed to initialize ParallelRandNumGen.\n"); |
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painCave.isFatal = 1;; |
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simError(); |
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} |
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int nProcessors; |
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MPI_Comm_size(MPI_COMM_WORLD, &nProcessors); |
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int newSeed = oneSeed +nCreatedRNG_; |
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mtRand_ = new MTRand(newSeed, nProcessors, worldRank); |
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MPI_Comm_rank( MPI_COMM_WORLD, &myRank_); |
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//In order to generate independent random number stream, the actual seed used by random |
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//number generator is the seed passed to the constructor plus the number of random number |
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//generators which are already created. |
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int newSeed = oneSeed + nCreatedRNG_; |
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mtRand_ = new MTRand(newSeed, nProcessors, myRank_); |
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++nCreatedRNG_; |
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} |
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} |
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ParallelRandNumGen::ParallelRandNumGen() { |
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ParallelRandNumGen::ParallelRandNumGen() { |
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std::vector<uint32> bigSeed; |
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const int masterNode = 0; |
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int nProcessors; |
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MPI_Comm_size(MPI_COMM_WORLD, &nProcessors); |
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mtRand_ = new MTRand(nProcessors, worldRank); |
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MPI_Comm_rank( MPI_COMM_WORLD, &myRank_); |
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mtRand_ = new MTRand(nProcessors, myRank_); |
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seed(); |
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++nCreatedRNG_; |
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} |
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seed(); /** @todo calling virtual function in constructor is not a good design */ |
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} |
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void ParallelRandNumGen::seed( const uint32 oneSeed ) { |
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void ParallelRandNumGen::seed( const uint32 oneSeed ) { |
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const int masterNode = 0; |
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int seed = oneSeed; |
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MPI_Bcast(&seed, 1, MPI_UNSIGNED_LONG, masterNode, MPI_COMM_WORLD); |
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if (seed != oneSeed) { |
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sprintf(painCave.errMsg, |
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"Using different seed to initialize ParallelRandNumGen.\n"); |
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painCave.isFatal = 1;; |
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simError(); |
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sprintf(painCave.errMsg, |
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"Using different seed to initialize ParallelRandNumGen.\n"); |
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painCave.isFatal = 1;; |
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simError(); |
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} |
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int newSeed = oneSeed +nCreatedRNG_; |
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mtRand_->seed(newSeed); |
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++nCreatedRNG_; |
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} |
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} |
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void ParallelRandNumGen::seed() { |
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void ParallelRandNumGen::seed() { |
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std::vector<uint32> bigSeed; |
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int size; |
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const int masterNode = 0; |
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if (worldRank == masterNode) { |
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bigSeed = mtRand_->generateSeeds(); |
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size = bigSeed.size(); |
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MPI_Bcast(&size, 1, MPI_INT, masterNode, MPI_COMM_WORLD); |
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MPI_Bcast(&bigSeed[0], size, MPI_UNSIGNED_LONG, masterNode, MPI_COMM_WORLD); |
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bigSeed = mtRand_->generateSeeds(); |
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size = bigSeed.size(); |
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MPI_Bcast(&size, 1, MPI_INT, masterNode, MPI_COMM_WORLD); |
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MPI_Bcast(&bigSeed[0], size, MPI_UNSIGNED_LONG, masterNode, MPI_COMM_WORLD); |
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}else { |
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MPI_Bcast(&size, 1, MPI_INT, masterNode, MPI_COMM_WORLD); |
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bigSeed.resize(size); |
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MPI_Bcast(&bigSeed[0], size, MPI_UNSIGNED_LONG, masterNode, MPI_COMM_WORLD); |
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MPI_Bcast(&size, 1, MPI_INT, masterNode, MPI_COMM_WORLD); |
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bigSeed.resize(size); |
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MPI_Bcast(&bigSeed[0], size, MPI_UNSIGNED_LONG, masterNode, MPI_COMM_WORLD); |
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} |
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if (bigSeed.size() == 1) { |
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mtRand_->seed(bigSeed[0]); |
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mtRand_->seed(bigSeed[0]); |
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} else { |
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mtRand_->seed(&bigSeed[0], bigSeed.size()); |
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mtRand_->seed(&bigSeed[0], bigSeed.size()); |
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} |
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++nCreatedRNG_; |
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} |
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} |
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} |