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Bandwidth measures inside stencil

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This commit is contained in:
Peter Boyle
2026-08-22 10:51:44 -04:00
parent 2e0c19c915
commit 152e9ecf3b
2 changed files with 14 additions and 4 deletions
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benchmarks/Benchmark_dwf.cc
+4 -1
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@@ -276,12 +276,14 @@ void Benchmark(int Ls, Coordinate Dirichlet,bool sloppy)
Dw.Dhop(src,result,0);
std::cout<<GridLogMessage<<"Called warmup"<<std::endl;
double t0=usecond();
double aveBW = 0;
for(int i=0;i<ncall;i++){
Dw.Dhop(src,result,0);
aveBW +=Dw.Stencil.InterNodeBandwidthMBps/ncall;
}
double t1=usecond();
FGrid->Barrier();
double volume=Ls; for(int mu=0;mu<Nd;mu++) volume=volume*latt4[mu];
double flops=single_site_flops*volume*ncall;
@@ -298,6 +300,7 @@ void Benchmark(int Ls, Coordinate Dirichlet,bool sloppy)
std::cout<<GridLogMessage << "mflop/s = "<< flops/(t1-t0)<<std::endl;
std::cout<<GridLogMessage << "mflop/s per rank = "<< flops/(t1-t0)/NP<<std::endl;
std::cout<<GridLogMessage << "mflop/s per node = "<< flops/(t1-t0)/NN<<std::endl;
std::cout<<GridLogMessage << "average bandwidth = "<< aveBW <<std::endl;
err = ref-result;
n2e = norm2(err);
std::cout<<GridLogMessage << "norm diff "<< n2e<< " Line "<<__LINE__ <<std::endl;