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added ifndef for virtual tile size (default value found empirically on R9 Nano card)

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This commit is contained in:
Peter Steinbach 2017-07-25 17:05:22 +02:00
parent 78a4f0cb73
commit 6712e26035
1 changed files with 9 additions and 7 deletions
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16
HCStream.cpp
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@ -10,7 +10,9 @@
#include <locale>
#include <numeric>
#define TBSIZE 1024
#ifndef VIRTUALTILESIZE
#define VIRTUALTILESIZE 1024
#endif
std::string getDeviceName(const hc::accelerator& _acc)
{
@ -50,11 +52,11 @@ HCStream<T>::HCStream(const unsigned int ARRAY_SIZE, const int device_index):
d_c(ARRAY_SIZE)
{
// The array size must be divisible by TBSIZE for kernel launches
if (ARRAY_SIZE % TBSIZE != 0)
// The array size must be divisible by VIRTUALTILESIZE for kernel launches
if (ARRAY_SIZE % VIRTUALTILESIZE != 0)
{
std::stringstream ss;
ss << "Array size must be a multiple of " << TBSIZE;
ss << "Array size must be a multiple of " << VIRTUALTILESIZE;
throw std::runtime_error(ss.str());
}
@ -214,7 +216,7 @@ T HCStream<T>::dot()
const auto& view_b = this->d_b;
auto ex = view_a.get_extent();
const auto tiled_ex = hc::extent<1>(n_tiles * TBSIZE).tile(TBSIZE);
const auto tiled_ex = hc::extent<1>(n_tiles * VIRTUALTILESIZE).tile(VIRTUALTILESIZE);
const auto domain_sz = tiled_ex.size();
hc::array<T, 1> partial(n_tiles);
@ -232,12 +234,12 @@ T HCStream<T>::dot()
gidx += domain_sz;
}
tile_static T tileData[TBSIZE];
tile_static T tileData[VIRTUALTILESIZE];
tileData[tidx.local[0]] = r;
tidx.barrier.wait_with_tile_static_memory_fence();
for (auto h = TBSIZE / 2; h; h /= 2) {
for (auto h = VIRTUALTILESIZE / 2; h; h /= 2) {
if (tidx.local[0] < h) {
tileData[tidx.local[0]] += tileData[tidx.local[0] + h];
}