diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/Makefile.am | 1 | ||||
| -rw-r--r-- | tools/Makefile.in | 638 | ||||
| -rw-r--r-- | tools/runtime-env/Makefile.am | 11 | ||||
| -rw-r--r-- | tools/runtime-env/Makefile.in | 592 | ||||
| -rw-r--r-- | tools/runtime-env/README.md | 95 | ||||
| -rw-r--r-- | tools/runtime-env/main.cpp | 496 |
6 files changed, 1833 insertions, 0 deletions
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Then change +directory into `tools/runtime-env`, and run `make runtime-env` to build the program: + +``` +cd tools/runtime-env +make runtime-env +``` + +### CMake + +To specify custom compiler flags in cmake, run with `cmake -E env CXXFLAGS="..."` +followed by the usual cmake configuration command. Here is an example of specifying +`-O3 -march=native -DNDEBUG` as the compiler flags to cmake: + +``` +mkdir build +cd build +cmake -E env CXXFLAGS="-O3 -march=native -DNDEBUG" cmake .. +``` + +Once the build configuration step is finished, build the tool by + +``` +cmake --build . --target runtime-env +``` +or simply + +``` +make runtime-env +``` + +if you use GNU Make as your backend. The program will be built at `./tools/runtime-env/runtime-env`. + +Run it +------ + +To run the tool, simply execute it with no arguments. It should show you a progress +bar indicating that it's performing benchmarks. Once finished, it should display an +ASCII chart similar to the following: + +``` + Category | Average duration (seconds) +---------------+--------------------------------------------------------> +(SoA, 16) | ooooooooooooo 0.04123 +(SoA, 32) | oooooooooooooo 0.04409 +(SoA, 08) | oooooooooooooooo 0.05151 +(AoS, 08) | ++++++++++++++++++ 0.05712 +(AoS, 16) | ++++++++++++++++++ 0.05799 +(AoS, 04) | ++++++++++++++++++ 0.0584 +(SoA, sse2+16) | ooooooooooooooooooo 0.06204 +(AoS, 32) | ++++++++++++++++++++ 0.06285 +(SoA, sse2+08) | oooooooooooooooooooo 0.06412 +(SoA, sse2+04) | ooooooooooooooooooooo 0.0673 +(SoA, 00) | ooooooooooooooooooooo 0.06833 +(SoA, 04) | ooooooooooooooooooooooo 0.07281 +(SoA, sse2+00) | ooooooooooooooooooooooooooooo 0.09283 +(AoS, 00) | +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 0.1712 + +Storage of SoA with the LU factor of 16 appears to be the best choice +in this environment. +``` + +What the chart shows are the average durations for some artificially created +block position adjustment tasks, and fewer the number the better. The results +are sorted in ascending order, so the item at the very top is considered to be +the most optimum choice in the current run-time environment. + +The program also generates the following files: + +* graph-output.txt +* raw-data.csv + +`graph-output.txt` simply contains the same ascii graph that was also output +to the terminal. `raw-data.csv` contains the raw benchmarks results which can +be useful for further analyses. diff --git a/tools/runtime-env/main.cpp b/tools/runtime-env/main.cpp new file mode 100644 index 0000000..c8e543b --- /dev/null +++ b/tools/runtime-env/main.cpp @@ -0,0 +1,496 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * Copyright (c) 2021 Kohei Yoshida + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + ************************************************************************/ + +#include <mdds/multi_type_vector/soa/block_util.hpp> +#include <mdds/multi_type_vector/aos/block_util.hpp> + +#include <iostream> +#include <iomanip> +#include <vector> +#include <chrono> +#include <map> +#include <sstream> +#include <fstream> +#include <limits> +#include <iterator> + +using mdds::mtv::lu_factor_t; +using std::cerr; +using std::cout; +using std::endl; + +namespace { + +std::string to_string(lu_factor_t lu) +{ + int lu_value = int(lu) & 0xFF; + bool sse2 = (int(lu) & 0x100) != 0; + bool avx2 = (int(lu) & 0x200) != 0; + + std::ostringstream os; + os << (sse2 ? "sse2+" : "") << (avx2 ? "avx2+" : "") << std::setw(2) << std::setfill('0') << lu_value; + + return os.str(); +} + +std::string reflow_text(std::string s, std::size_t width) +{ + // Tokenize the text first. + std::vector<std::string> tokens; + + const char* p = s.data(); + const char* p_end = p + s.size(); + const char* p0 = nullptr; + + for (; p != p_end; ++p) + { + if (!p0) + p0 = p; + + if (*p == ' ' && p0) + { + std::string token(p0, p - p0); + tokens.emplace_back(p0, p - p0); + p0 = nullptr; + } + } + + if (p0) + tokens.emplace_back(p0, p - p0); + + std::vector<std::string> lines(1, std::string()); + + for (const std::string& token : tokens) + { + std::string this_line = lines.back(); // copy + if (this_line.empty()) + this_line = token; + else + this_line += ' ' + token; + + if (this_line.size() > width) + lines.push_back(token); + else + lines.back() = this_line; + } + + std::ostringstream os; + std::copy(lines.begin(), lines.end(), std::ostream_iterator<std::string>(os, "\n")); + return os.str(); +} + +std::string pad_right(std::string s, int width) +{ + int gap = width - int(s.size()); + if (gap < 0) + return s; + + return s + std::string(gap, ' '); +} + +class section_timer +{ +public: + explicit section_timer() + { + m_start_time = get_time(); + } + + double get_duration() const + { + double end_time = get_time(); + return end_time - m_start_time; + } + +private: + double get_time() const + { + unsigned long usec_since_epoch = + std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now().time_since_epoch()) + .count(); + + return usec_since_epoch / 1000000.0; + } + + double m_start_time; +}; + +class data_handler +{ + struct key_type + { + std::string type; + lu_factor_t lu; + + key_type(const std::string& type_, lu_factor_t lu_) : type(type_), lu(lu_) + {} + + bool operator<(const key_type& other) const + { + if (type != other.type) + return type < other.type; + + return lu < other.lu; + } + + std::string to_string() const + { + std::ostringstream os; + os << '(' << type << ", " << ::to_string(lu) << ')'; + return os.str(); + } + }; + + struct duration_type + { + double duration = 0.0; + int count = 0; + + duration_type(double duration_, int count_) : duration(duration_), count(count_) + {} + + std::string to_string() const + { + std::ostringstream os; + os << std::setprecision(4) << duration << '/' << count; + return os.str(); + } + }; + + using records_type = std::map<key_type, duration_type>; + using raw_records_type = std::vector<std::tuple<std::string, lu_factor_t, int, int, double>>; + records_type m_records; + raw_records_type m_raw_records; + int m_insert_count = 0; + + void draw_graph() const + { + if (m_records.empty()) + return; + + // Convert to sequence of average durations. + std::vector<std::tuple<key_type, double>> averages; + averages.reserve(m_records.size()); + + for (const auto& kv : m_records) + { + const duration_type& v = kv.second; + averages.emplace_back(kv.first, v.duration / v.count); + } + + // Sort by durations. + std::sort(averages.begin(), averages.end(), [](const auto& left, const auto& right) -> bool { + return std::get<1>(left) < std::get<1>(right); + }); + + const int n_ticks_max = 55; + + double min_v = std::numeric_limits<double>::max(); + double max_v = std::numeric_limits<double>::min(); + + for (const auto& average : averages) + { + double v = std::get<1>(average); + min_v = std::min(min_v, v); + max_v = std::max(max_v, v); + } + + double tick_width = max_v / n_ticks_max; + + std::vector<std::pair<std::string, std::string>> lines; + lines.reserve(averages.size()); + int max_label_width = 0; + + for (const auto& average : averages) + { + const key_type& k = std::get<0>(average); + double v = std::get<1>(average); + + lines.emplace_back(); + auto& line = lines.back(); + + int n_ticks = v / tick_width; + + // Create and store the label first. + std::ostringstream label; + label << '(' << k.type << ", " << to_string(k.lu) << ')'; + line.first = label.str(); + + char tick = k.type == "SoA" ? 'o' : '+'; + + // Create and store the bar next. + std::ostringstream bar; + bar << std::string(n_ticks, tick) << ' ' << std::setprecision(4) << v; + line.second = bar.str(); + + max_label_width = std::max<int>(max_label_width, line.first.size()); + } + + for (auto& line : lines) + line.first = pad_right(std::move(line.first), max_label_width); + + std::ostringstream graph_out; + + { + // Print the top label and axis. Make sure to rewind to erase the + // progress text. + std::string line = pad_right(" Category", max_label_width); + line += " | Average duration (seconds)"; + graph_out << line << "\n"; + + line = std::string(max_label_width, '-') + "-+-" + std::string(n_ticks_max, '-') + '>'; + graph_out << line << "\n"; + } + + for (const auto& line : lines) + graph_out << line.first << " | " << line.second << "\n"; + + graph_out << "\n"; + + const key_type& top_key = std::get<0>(averages[0]); + std::ostringstream os; + os << "Storage of " << top_key.type << " with the LU factor of " << to_string(top_key.lu) + << " appears to be the best choice in this environment."; + + graph_out << reflow_text(os.str(), 70) << endl; + + std::string graph_out_s = graph_out.str(); + + cout << "\r" << graph_out_s; + + std::ofstream of("graph-output.txt"); + of << graph_out_s << std::flush; + } + + void write_csv() const + { + std::ofstream of("raw-data.csv"); + of << "storage,factor,block count,repeat count,duration\n"; + + for (const auto& rec : m_raw_records) + { + const std::string& type = std::get<0>(rec); + lu_factor_t lu = std::get<1>(rec); + int block_size = std::get<2>(rec); + int repeats = std::get<3>(rec); + double duration = std::get<4>(rec); + + of << type << "," << to_string(lu) << "," << block_size << "," << repeats << "," << duration << "\n"; + } + + of << std::flush; + } + +public: + data_handler() + {} + + void start() + { + m_insert_count = 0; + } + + void end() + { + draw_graph(); + write_csv(); + } + + void record_time(const std::string& type, lu_factor_t lu, int block_size, int repeats, double duration) + { + key_type key(type, lu); + + auto it = m_records.lower_bound(key); + if (it != m_records.end() && !m_records.key_comp()(key, it->first)) + { + // key exists + duration_type& v = it->second; + v.duration += duration; + ++v.count; + } + else + { + // key doesn't yet exist. + m_records.insert(it, records_type::value_type(key, {duration, 1})); + } + + if (!(++m_insert_count & 0x1F)) + { + int n_ticks = m_insert_count >> 5; + cout << "\rprogress: " << std::string(n_ticks, '#') << std::flush; + } + + m_raw_records.emplace_back(type, lu, block_size, repeats, duration); + } +}; + +/** + * Class designed to measure run-time performance of AoS multi_type_vector + * with various loop-unrolling factors. + */ +class mtv_aos_luf_runner +{ + data_handler& m_handler; + + struct block + { + std::size_t position; + std::size_t size; + void* data; + + block(std::size_t _position, std::size_t _size) : position(_position), size(_size) + {} + }; + + using blocks_type = std::vector<block>; + + template<lu_factor_t Factor> + void measure_duration(blocks_type blocks, int block_size, int repeats) + { + using namespace mdds::mtv::aos::detail; + + section_timer st; + for (int i = 0; i < repeats; ++i) + adjust_block_positions<blocks_type, Factor>{}(blocks, 0, 1); + + m_handler.record_time("AoS", Factor, block_size, repeats, st.get_duration()); + } + +public: + mtv_aos_luf_runner(data_handler& dh) : m_handler(dh) + {} + + void run(int block_size, int repeats) + { + blocks_type blocks; + + std::size_t pos = 0; + std::size_t size = 2; + for (int i = 0; i < block_size; ++i) + { + blocks.emplace_back(pos, size); + pos += size; + } + + measure_duration<lu_factor_t::none>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu4>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu8>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu16>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu32>(blocks, block_size, repeats); + } +}; + +class mtv_soa_luf_runner +{ + data_handler& m_handler; + + struct blocks_type + { + std::vector<std::size_t> positions; + std::vector<std::size_t> sizes; + std::vector<void*> element_blocks; + }; + + template<lu_factor_t Factor> + void measure_duration(blocks_type blocks, int block_size, int repeats) + { + using namespace mdds::mtv::soa::detail; + + section_timer st; + for (int i = 0; i < repeats; ++i) + adjust_block_positions<blocks_type, Factor>{}(blocks, 0, 1); + + m_handler.record_time("SoA", Factor, block_size, repeats, st.get_duration()); + } + +public: + mtv_soa_luf_runner(data_handler& dh) : m_handler(dh) + {} + + void run(int block_size, int repeats) + { + blocks_type blocks; + + std::size_t pos = 0; + std::size_t size = 2; + for (int i = 0; i < block_size; ++i) + { + blocks.positions.push_back(pos); + blocks.sizes.push_back(size); + pos += size; + } + + measure_duration<lu_factor_t::none>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu4>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu8>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu16>(blocks, block_size, repeats); + measure_duration<lu_factor_t::lu32>(blocks, block_size, repeats); +#if SIZEOF_VOID_P == 8 && defined(__SSE2__) + measure_duration<lu_factor_t::sse2_x64>(blocks, block_size, repeats); + measure_duration<lu_factor_t::sse2_x64_lu4>(blocks, block_size, repeats); + measure_duration<lu_factor_t::sse2_x64_lu8>(blocks, block_size, repeats); + measure_duration<lu_factor_t::sse2_x64_lu16>(blocks, block_size, repeats); +#endif +#if SIZEOF_VOID_P == 8 && defined(__AVX2__) + measure_duration<lu_factor_t::avx2_x64>(blocks, block_size, repeats); + measure_duration<lu_factor_t::avx2_x64_lu4>(blocks, block_size, repeats); + measure_duration<lu_factor_t::avx2_x64_lu8>(blocks, block_size, repeats); +#endif + } +}; + +} // namespace + +int main() +{ + int block_count_init = 5; + int block_count_step = 5; + int block_count_max = 300; + int repeats = 1000000; + + data_handler dh; + dh.start(); + + for (int block_count = block_count_init; block_count <= block_count_max; block_count += block_count_step) + { + mtv_aos_luf_runner runner(dh); + runner.run(block_count, repeats); + } + + for (int block_count = block_count_init; block_count <= block_count_max; block_count += block_count_step) + { + mtv_soa_luf_runner runner(dh); + runner.run(block_count, repeats); + } + + dh.end(); + + return EXIT_SUCCESS; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |