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Sizable improvement in multigrid for unsquared.

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6000 matmuls CG unprec
2000 matmuls CG prec (4000 eo muls)
1050 matmuls PGCR on 16^3 x 32 x 8 m=.01

Substantial effort on timing and logging infrastructure
This commit is contained in:
Peter Boyle
2015-07-24 01:31:13 +09:00
parent 11c99d5e66
commit d1afebf71e
67 changed files with 945 additions and 753 deletions
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14
tests/Test_remez.cc
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@ -8,7 +8,7 @@ int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
std::cout << "Testing Remez"<<std::endl;
std::cout<<GridLogMessage << "Testing Remez"<<std::endl;
double lo=0.01;
double hi=1.0;
@ -20,13 +20,13 @@ int main (int argc, char ** argv)
// sqrt and inverse sqrt
////////////////////////////////////////
std::cout << "Generating degree "<<degree<<" for x^(1/2)"<<std::endl;
std::cout<<GridLogMessage << "Generating degree "<<degree<<" for x^(1/2)"<<std::endl;
remez.generateApprox(degree,1,2);
MultiShiftFunction Sqrt(remez,1.0,false);
MultiShiftFunction InvSqrt(remez,1.0,true);
std::cout << "Generating degree "<<degree<<" for x^(1/4)"<<std::endl;
std::cout<<GridLogMessage << "Generating degree "<<degree<<" for x^(1/4)"<<std::endl;
remez.generateApprox(degree,1,4);
MultiShiftFunction SqrtSqrt(remez,1.0,false);
MultiShiftFunction InvSqrtSqrt(remez,1.0,true);
@ -49,10 +49,10 @@ int main (int argc, char ** argv)
double aisx =InvSqrt.approx(x);
double aissx=InvSqrtSqrt.approx(x);
std::cout << "x^(1/2) : "<<sx<<" "<<asx<<std::endl;
std::cout << "x^(1/4) : "<<ssx<<" "<<assx<<std::endl;
std::cout << "x^(-1/2): "<<isx<<" "<<aisx<<std::endl;
std::cout << "x^(-1/4): "<<issx<<" "<<aissx<<std::endl;
std::cout<<GridLogMessage << "x^(1/2) : "<<sx<<" "<<asx<<std::endl;
std::cout<<GridLogMessage << "x^(1/4) : "<<ssx<<" "<<assx<<std::endl;
std::cout<<GridLogMessage << "x^(-1/2): "<<isx<<" "<<aisx<<std::endl;
std::cout<<GridLogMessage << "x^(-1/4): "<<issx<<" "<<aissx<<std::endl;
assert(fabs(sx-asx)<1.0e-6);
assert(fabs(ssx-assx)<1.0e-6);
assert(fabs(isx-aisx)<1.0e-6);