https://github.com/paboyle/Grid
Tip revision: b9c453e1c08ce94dda589d77993a7017158e5c45 authored by Guido Cossu on 02 May 2018, 13:30:27 UTC
Fix for the CI
Fix for the CI
Tip revision: b9c453e
Benchmark_memory_asynch.cc
/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./benchmarks/Benchmark_memory_asynch.cc
Copyright (C) 2015
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: paboyle <paboyle@ph.ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <Grid/Grid.h>
using namespace std;
using namespace Grid;
using namespace Grid::QCD;
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
const int Nvec=8;
typedef Lattice< iVector< vReal,Nvec> > LatticeVec;
typedef iVector<vReal,Nvec> Vec;
std::vector<int> simd_layout = GridDefaultSimd(Nd,vReal::Nsimd());
std::vector<int> mpi_layout = GridDefaultMpi();
int threads = GridThread::GetThreads();
std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
std::cout<<GridLogMessage << "===================================================================================================="<<std::endl;
std::cout<<GridLogMessage << "= Benchmarking READ bandwidth"<<std::endl;
std::cout<<GridLogMessage << "===================================================================================================="<<std::endl;
std::cout<<GridLogMessage << " L "<<"\t\t"<<"bytes"<<"\t\t"<<"bytes/thread"<<"\t\t\t"<<"GB/s"<<"\t\t\t"<<"GB/s per thread"<<std::endl;
std::cout<<GridLogMessage << "----------------------------------------------------------"<<std::endl;
const int lmax = 16536*16;
for(int lat=4;lat<=lmax;lat*=2){
int Nloop=lmax*4/lat;
std::vector<int> latt_size ({2*mpi_layout[0],2*mpi_layout[1],4*mpi_layout[2],lat*mpi_layout[3]});
GridCartesian Grid(latt_size,simd_layout,mpi_layout);
int vol = latt_size[0]*latt_size[1]*latt_size[2]*latt_size[3]*threads;
Vec tsum; tsum = zero;
GridParallelRNG pRNG(&Grid);
pRNG.SeedFixedIntegers(std::vector<int>({56,17,89,101}));
std::vector<double> stop(threads);
Vector<Vec> sum(threads);
std::vector<LatticeVec> x(threads,&Grid);
for(int t=0;t<threads;t++){
// random(pRNG,x[t]);
}
double start=usecond();
parallel_for(int t=0;t<threads;t++){
sum[t] = x[t]._odata[0];
for(int i=0;i<Nloop;i++){
for(auto ss=x[t].begin();ss<x[t].end();ss++){
sum[t] = sum[t]+x[t]._odata[ss];
}
}
stop[t]=usecond();
}
double max_stop=stop[0];
double min_stop=stop[0];
for(int t=0;t<threads;t++){
tsum+=sum[t];
if ( stop[t]<min_stop ) min_stop=stop[t];
if ( stop[t]>max_stop ) max_stop=stop[t];
}
double max_time = (max_stop-start)/Nloop*1000;
double min_time = (min_stop-start)/Nloop*1000;
double bytes=vol*Nvec*sizeof(Real);
std::cout<<GridLogMessage<<std::setprecision(3) << lat<<"\t\t"<<bytes<<"\t\t"<<bytes/threads<<"\t\t"<<bytes/max_time<<" - "<< bytes/min_time<<"\t\t"<<bytes/min_time/threads <<std::endl;
}
Grid_finalize();
}