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Sha used to seed from a unique string

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This commit is contained in:
paboyle
2018-08-10 15:11:01 +01:00
parent 00f31ae83f
commit 27cdb79063
4 changed files with 98 additions and 6 deletions
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29
lib/lattice/Lattice_rng.h
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@ -251,7 +251,7 @@ namespace Grid {
dist[0].reset();
for(int idx=0;idx<words;idx++){
fillScalar(buf[idx],dist[0],_generators[0]);
fillScalar(buf[idx],dist[0],_generators[0]);
}
CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
@ -283,7 +283,7 @@ namespace Grid {
RealF *pointer=(RealF *)&l;
dist[0].reset();
for(int i=0;i<2*vComplexF::Nsimd();i++){
fillScalar(pointer[i],dist[0],_generators[0]);
fillScalar(pointer[i],dist[0],_generators[0]);
}
CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
}
@ -291,7 +291,7 @@ namespace Grid {
RealD *pointer=(RealD *)&l;
dist[0].reset();
for(int i=0;i<2*vComplexD::Nsimd();i++){
fillScalar(pointer[i],dist[0],_generators[0]);
fillScalar(pointer[i],dist[0],_generators[0]);
}
CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
}
@ -299,7 +299,7 @@ namespace Grid {
RealF *pointer=(RealF *)&l;
dist[0].reset();
for(int i=0;i<vRealF::Nsimd();i++){
fillScalar(pointer[i],dist[0],_generators[0]);
fillScalar(pointer[i],dist[0],_generators[0]);
}
CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
}
@ -317,6 +317,17 @@ namespace Grid {
std::seed_seq src(seeds.begin(),seeds.end());
Seed(src,0);
}
void SeedUniqueString(const std::string &s){
std::vector<int> seeds;
seeds = GridChecksum::sha256_seeds(s);
std::cout << GridLogMessage << "Intialising Serial RNG with unique string " <<s<< std::endl;
std::cout << GridLogMessage << "SHA seeds are: " <<s<< std::endl;
for(int i=0;i<seeds.size();i++){
std::cout << GridLogMessage << "\t " <<seeds[i]<< std::endl;
}
SeedFixedIntegers(seeds);
}
};
class GridParallelRNG : public GridRNGbase {
@ -377,6 +388,16 @@ namespace Grid {
_time_counter += usecond()- inner_time_counter;
};
void SeedUniqueString(const std::string &s){
std::vector<int> seeds;
seeds = GridChecksum::sha256_seeds(s);
std::cout << GridLogMessage << "Intialising Parallel RNG with unique string " <<s<< std::endl;
std::cout << GridLogMessage << "SHA seeds are: " <<s<< std::endl;
for(int i=0;i<seeds.size();i++){
std::cout << GridLogMessage << "\t " <<seeds[i]<< std::endl;
}
SeedFixedIntegers(seeds);
}
void SeedFixedIntegers(const std::vector<int> &seeds){
// Everyone generates the same seed_seq based on input seeds