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Added mixed-precision CG with reliable updates

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This commit is contained in:
Christopher Kelly
2017-07-25 11:30:41 -04:00
parent fe4912880d
commit 9f280b82c4
3 changed files with 260 additions and 12 deletions
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40
tests/Test_dwf_mixedcg_prec_halfcomms.cc
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@ -80,31 +80,47 @@ int main (int argc, char ** argv)
LatticeFermionD src_o(FrbGrid);
LatticeFermionD result_o(FrbGrid);
LatticeFermionD result_o_2(FrbGrid);
LatticeFermionD result_cg(FrbGrid);
pickCheckerboard(Odd,src_o,src);
result_o.checkerboard = Odd;
result_o = zero;
result_o_2.checkerboard = Odd;
result_o_2 = zero;
result_cg.checkerboard = Odd;
result_cg = zero;
LatticeFermionD result_mcg(result_cg);
LatticeFermionD result_rlcg(result_cg);
SchurDiagMooeeOperator<DomainWallFermionD,LatticeFermionD> HermOpEO(Ddwf);
SchurDiagMooeeOperator<DomainWallFermionFH,LatticeFermionF> HermOpEO_f(Ddwf_f);
//#define DO_MIXED_CG
#define DO_RLUP_CG
#ifdef DO_MIXED_CG
std::cout << "Starting mixed CG" << std::endl;
MixedPrecisionConjugateGradient<LatticeFermionD,LatticeFermionF> mCG(1.0e-8, 10000, 50, FrbGrid_f, HermOpEO_f, HermOpEO);
mCG.InnerTolerance = 3.0e-5;
mCG(src_o,result_o);
mCG(src_o,result_mcg);
#endif
#ifdef DO_RLUP_CG
std::cout << "Starting reliable update CG" << std::endl;
ConjugateGradientReliableUpdate<LatticeFermionD,LatticeFermionF> rlCG(1.e-8, 10000, 0.1, FrbGrid_f, HermOpEO_f, HermOpEO);
rlCG(src_o,result_rlcg);
#endif
std::cout << "Starting regular CG" << std::endl;
ConjugateGradient<LatticeFermionD> CG(1.0e-8,10000);
CG(HermOpEO,src_o,result_o_2);
CG(HermOpEO,src_o,result_cg);
LatticeFermionD diff_o(FrbGrid);
RealD diff = axpy_norm(diff_o, -1.0, result_o, result_o_2);
std::cout << "Diff between mixed and regular CG: " << diff << std::endl;
#ifdef DO_MIXED_CG
LatticeFermionD diff_mcg(FrbGrid);
RealD vdiff_mcg = axpy_norm(diff_mcg, -1.0, result_cg, result_mcg);
std::cout << "Diff between mixed and regular CG: " << vdiff_mcg << std::endl;
#endif
#ifdef DO_RLUP_CG
LatticeFermionD diff_rlcg(FrbGrid);
RealD vdiff_rlcg = axpy_norm(diff_rlcg, -1.0, result_cg, result_rlcg);
std::cout << "Diff between reliable update and regular CG: " << vdiff_rlcg << std::endl;
#endif
Grid_finalize();
}