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paboyle
2018-03-04 16:39:29 +00:00
parent 3277bda130
commit aead94e9a7
6 changed files with 84 additions and 36 deletions
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22
benchmarks/Benchmark_memory_bandwidth.cc
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@ -75,9 +75,12 @@ int main (int argc, char ** argv)
double start=usecond();
for(int i=0;i<Nloop;i++){
auto x_v = x.View();
auto y_v = y.View();
auto z_v = z.View();
axpy(z,a,x,y);
x[0]=z[0]; // serial loop dependence to prevent optimise
y[4]=z[4];
x_v[0]=z_v[0]; // serial loop dependence to prevent optimise
y_v[4]=z_v[4];
}
double stop=usecond();
double time = (stop-start)/Nloop*1000;
@ -111,9 +114,12 @@ int main (int argc, char ** argv)
double start=usecond();
for(int i=0;i<Nloop;i++){
auto x_v = x.View();
auto y_v = y.View();
auto z_v = z.View();
z=a*x-y;
x[0]=z[0]; // force serial dependency to prevent optimise away
y[4]=z[4];
x_v[0]=z_v[0]; // force serial dependency to prevent optimise away
y_v[4]=z_v[4];
}
double stop=usecond();
double time = (stop-start)/Nloop*1000;
@ -145,11 +151,12 @@ int main (int argc, char ** argv)
LatticeVec y(&Grid);// random(pRNG,y);
RealD a=2.0;
double start=usecond();
for(int i=0;i<Nloop;i++){
auto x_v = x.View();
auto z_v = z.View();
z=a*x;
x[0]=z[0]*2.0;
x_v[0]=z_v[0]*2.0;
}
double stop=usecond();
double time = (stop-start)/Nloop*1000;
@ -181,8 +188,9 @@ int main (int argc, char ** argv)
Real nn;
double start=usecond();
for(int i=0;i<Nloop;i++){
auto x_v = x.View();
nn=norm2(x);
vsplat(x[0]._internal[0],nn);
vsplat(x_v[0]._internal[0],nn);
}
double stop=usecond();
double time = (stop-start)/Nloop*1000;