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Point-to-Point latency #7

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simon.buerger wants to merge 9 commits from simon.buerger/lattice-benchmarks:latency_benchmark into main
pull from: simon.buerger/lattice-benchmarks:latency_benchmark
merge into: portelli:main
Conversation 2 Commits 9 Files Changed 1 +5 -3
1 changed files with 5 additions and 3 deletions
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Grid/Benchmark_Grid.cpp
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@ -266,7 +266,8 @@ class Benchmark
static void Latency(void)
{
int Nloop = 200;
int Nwarmup = 100;
int Nloop = 1000;
Coordinate simd_layout = GridDefaultSimd(Nd, vComplexD::Nsimd());
Coordinate mpi_layout = GridDefaultMpi();
@ -302,7 +303,7 @@ class Benchmark
time_statistics timestat;
MPI_Status status;
for (int i = 0; i < Nloop; ++i)
for (int i = -Nwarmup; i < Nloop; ++i)
{
double start = usecond();
if (from == me)
@ -321,7 +322,8 @@ class Benchmark
assert(err == MPI_SUCCESS);
}
double stop = usecond();
t_time[i] = stop - start;
if (i >= 0)
t_time[i] = stop - start;
}
// important: only the 'from' rank has a trustworthy time
MPI_Bcast(t_time.data(), Nloop, MPI_DOUBLE, from, Grid.communicator);