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[STF] Use a reduce access mode to compute residuals #651

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[STF] Use a reduce access mode to compute residuals #651

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39 changes: 11 additions & 28 deletions Cxx11/dgemm-cublas-cudastf.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,6 @@ int main(int argc, char * argv[])
double gemm_time(0);

const int matrices = (batches==0 ? 1 : abs(batches));
const size_t nelems = (size_t)order * (size_t)order;

const auto epsilon = 1.0e-8;
const auto forder = static_cast<double>(order);
Expand Down Expand Up @@ -194,22 +193,13 @@ int main(int argc, char * argv[])
cudaStreamSynchronize(ctx.task_fence());
gemm_time = prk::wtime() - gemm_time;

ctx.host_launch(c.read())->*[&](auto hc)
{
for (size_t k = 0; k < hc.extent(2); k++)
{
double checksum = 0.0;

for (size_t j = 0; j < hc.extent(1); j++)
for (size_t i = 0; i < hc.extent(0); i++)
{
checksum += hc(i, j, k);
}

residuum += std::abs(checksum-reference)/reference;
}
residuum /= matrices;
auto lsum = ctx.logical_data(shape_of<scalar<double>>());
ctx.parallel_for(c.shape(), c.read(), lsum.reduce(reducer::sum<double>{}))
->*[]__device__(size_t i, size_t j, size_t k, auto dc, double &sum) {
sum += dc(i, j, k);
};
double checksum = ctx.wait(lsum)/matrices;
residuum = std::abs(checksum-reference)/reference/matrices;
}
else {
::std::vector<logical_data<slice<double, 2>>> vector_a;
Expand Down Expand Up @@ -264,22 +254,15 @@ int main(int argc, char * argv[])

for (size_t k = 0; k < matrices; k++)
{
double checksum = 0.0;
ctx.host_launch(vector_c[k].read())->*[&](auto hck)
{
for (size_t j = 0; j < hck.extent(1); j++)
for (size_t i = 0; i < hck.extent(0); i++)
{
checksum += hck(i, j);
}
auto lsum = ctx.logical_data(shape_of<scalar<double>>());
ctx.parallel_for(vector_c[k].shape(), vector_c[k].read(), lsum.reduce(reducer::sum<double>{}))
->*[]__device__(size_t i, size_t j, auto dck, double &sum) {
sum += dck(i, j);
};

cudaStreamSynchronize(ctx.task_fence());
double checksum = ctx.wait(lsum);
residuum += std::abs(checksum-reference)/reference;

}
residuum /= matrices;

}

//////////////////////////////////////////////////////////////////////
Expand Down