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Staggered multinode block cg debugged. Missing global sum.

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Code stalls and resumes on KNL at cambridge. Curious.

CG iterations 23ms each, then 3200 ms pauses. Mean bandwidth reports
as 200MB/s. Comms dominant in the report. However, the time behaviour suggests it
is *bursty*.... Could be swap to disk?
This commit is contained in:
Azusa Yamaguchi
2017-08-23 15:07:18 +01:00
parent 383ca7d392
commit d9cd4f0273
5 changed files with 110 additions and 15 deletions
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8
tests/solver/Test_staggered_block_cg_unprec.cc
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@ -75,7 +75,7 @@ int main (int argc, char ** argv)
LatticeGaugeField Umu(UGrid); SU3::HotConfiguration(pRNG,Umu);
RealD mass=0.003;
ImprovedStaggeredFermion5DR Ds(Umu,Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass);
ImprovedStaggeredFermion5DR Ds(Umu,Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass);
MdagMLinearOperator<ImprovedStaggeredFermion5DR,FermionField> HermOp(Ds);
ConjugateGradient<FermionField> CG(1.0e-8,10000);
@ -99,21 +99,27 @@ int main (int argc, char ** argv)
std::cout << GridLogMessage << " Calling 5d CG for "<<Ls <<" right hand sides" <<std::endl;
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
result=zero;
Ds.ZeroCounters();
CG(HermOp,src,result);
Ds.Report();
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
std::cout << GridLogMessage << " Calling multiRHS CG for "<<Ls <<" right hand sides" <<std::endl;
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
result=zero;
Ds.ZeroCounters();
mCG(HermOp,src,result);
Ds.Report();
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
std::cout << GridLogMessage << " Calling Block CG for "<<Ls <<" right hand sides" <<std::endl;
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;
result=zero;
Ds.ZeroCounters();
BCGrQ(HermOp,src,result);
Ds.Report();
std::cout << GridLogMessage << "************************************************************************ "<<std::endl;