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/*
* This file is a part of TiledArray.
* Copyright (C) 2013 Virginia Tech
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <tiledarray.h>
#include <iostream>
int main(int argc, char** argv) {
int rc = 0;
try {
// Initialize runtime
TiledArray::World& world = TiledArray::initialize(argc, argv);
// Get command line arguments
if (argc < 2) {
std::cout << "Usage: " << argv[0]
<< " matrix_size block_size band_width [repetitions]\n";
return 0;
}
const long matrix_size = atol(argv[1]);
const long block_size = atol(argv[2]);
const long band_width = atol(argv[3]);
if (matrix_size <= 0) {
std::cerr << "Error: matrix size must be greater than zero.\n";
return 1;
}
if (block_size <= 0) {
std::cerr << "Error: block size must be greater than zero.\n";
return 1;
}
if ((matrix_size % block_size) != 0ul) {
std::cerr
<< "Error: matrix size must be evenly divisible by block size.\n";
return 1;
}
if (band_width < 0) {
std::cerr << "Error: Band width must be greater than zero.\n";
return 1;
}
if (band_width > (matrix_size / 2)) {
std::cerr
<< "Error: Band width must be less than half the matrix size.\n";
return 1;
}
const long repeat = (argc >= 5 ? atol(argv[4]) : 5);
if (repeat <= 0) {
std::cerr << "Error: number of repetitions must be greater than zero.\n";
return 1;
}
const long num_blocks = matrix_size / block_size;
std::size_t block_count = 0;
for (int i = -band_width + 1; i < band_width; ++i) {
block_count += num_blocks - (2 * std::abs(i));
}
if (world.rank() == 0)
std::cout << "TiledArray: block-banded matrix multiply test...\n"
<< "Number of nodes = " << world.size()
<< "\nMatrix size = " << matrix_size << "x"
<< matrix_size << "\nBlock size = " << block_size << "x"
<< block_size << "\nMemory per matrix = "
<< double(block_count * block_size * block_size *
sizeof(double)) /
1.0e9
<< " GB\nNumber of blocks = " << block_count
<< "\nAverage blocks/node = " << block_count / world.size()
<< "\n";
// Construct TiledRange
std::vector<unsigned int> blocking;
blocking.reserve(num_blocks + 1);
for (long i = 0l; i <= matrix_size; i += block_size) blocking.push_back(i);
std::vector<TiledArray::TiledRange1> blocking2(
2, TiledArray::TiledRange1(blocking.begin(), blocking.end()));
TiledArray::TiledRange trange(blocking2.begin(), blocking2.end());
TiledArray::SparseShape<float>::threshold(0.5);
// Construct shape
TiledArray::Tensor<float> shape_tensor(trange.tiles_range(), 0.0f);
for (long i = 0l; i < num_blocks; ++i) {
long j = std::max<long>(i - band_width + 1, 0);
const long j_end = std::min<long>(i + band_width - 1, num_blocks);
long ij = i * num_blocks + j;
for (; j < j_end; ++j, ++ij) shape_tensor[ij] = 1.0;
}
TiledArray::SparseShape<float> shape(shape_tensor, trange);
// Construct and initialize arrays
TiledArray::TSpArrayD a(world, trange, shape);
TiledArray::TSpArrayD b(world, trange, shape);
TiledArray::TSpArrayD c(world, trange);
a.fill(1.0);
b.fill(1.0);
// Start clock
world.gop.fence();
const double wall_time_start = madness::wall_time();
// Do matrix multiplication
for (int i = 0; i < repeat; ++i) {
c("m,n") = a("m,k") * b("k,n");
world.gop.fence();
if (world.rank() == 0) std::cout << "Iteration " << i + 1 << "\n";
}
// Stop clock
const double wall_time_stop = madness::wall_time();
// Print results
const long flop = 2.0 * c("m,n").sum().get();
if (world.rank() == 0) {
std::cout << "Average wall time = "
<< (wall_time_stop - wall_time_start) / double(repeat)
<< "\nAverage GFLOPS = "
<< double(repeat) * double(flop) /
(wall_time_stop - wall_time_start) / 1.0e9
<< "\n";
}
TiledArray::finalize();
} catch (TiledArray::Exception& e) {
std::cerr << "!! TiledArray exception: " << e.what() << "\n";
rc = 1;
} catch (madness::MadnessException& e) {
std::cerr << "!! MADNESS exception: " << e.what() << "\n";
rc = 1;
} catch (SafeMPI::Exception& e) {
std::cerr << "!! SafeMPI exception: " << e.what() << "\n";
rc = 1;
} catch (std::exception& e) {
std::cerr << "!! std exception: " << e.what() << "\n";
rc = 1;
} catch (...) {
std::cerr << "!! exception: unknown exception\n";
rc = 1;
}
return rc;
}
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