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exprtk_vector_benchmark.cpp
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exprtk_vector_benchmark.cpp
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/*
**************************************************************
* C++ Mathematical Expression Toolkit Library *
* *
* ExprTk Vector Processing Benchmark *
* Author: Arash Partow (1999-2023) *
* URL: https://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
* Free use of the Mathematical Expression Toolkit Library is *
* permitted under the guidelines and in accordance with the *
* most current version of the MIT License. *
* https://www.opensource.org/licenses/MIT *
* *
**************************************************************
*/
#include <cstdio>
#include <fstream>
#include <limits>
#include <string>
#include <vector>
#include "exprtk.hpp"
struct test_expression
{
std::size_t cost;
std::string e;
test_expression(const std::size_t c, const std::string& ex)
: cost(c),
e(ex)
{}
};
const test_expression global_expression_list[] =
{
test_expression( 1,"2 * v0" ),
test_expression( 1,"v0 * 2" ),
test_expression( 2,"2v0 + 3" ),
test_expression( 2,"3 + 2v0" ),
test_expression( 5,"(2v0 + 3) * (2v0 + 3)" ),
test_expression( 5,"(3 + 2v0) * (3 + 2v0)" ),
test_expression( 1,"v0 + v1" ),
test_expression( 3,"(v0 + v1) * (v0 - v1)" ),
test_expression( 3,"2v0 + 3v1" ),
test_expression( 3,"2v0 - v1 / 3" ),
test_expression( 2,"v0 * v1 / v2" ),
test_expression( 3,"2(v0 * v1 / v2)" ),
test_expression( 4,"2(v0 / 3 + v1 / 4)" ),
test_expression( 3,"(2v0 - v1 / v2)" ),
test_expression( 4,"3(2v0 - v1 / v2)" ),
test_expression( 5,"7(5v0 * 3v1 / 2v2)" ),
test_expression( 5,"abs(v0 - v1) * abs(v1 - v0)" ),
test_expression( 7,"abs(2v0 - v1) * abs(v1 - 2v0)" ),
test_expression( 9,"abs(2v0 - 3v1) * abs(3v1 - 5v0)" ),
test_expression( 2,"sum(2 * v0)" ),
test_expression( 2,"sum(v0 * 2)" ),
test_expression( 2,"sum(v0 * v1)" ),
test_expression( 3,"sum(2v0 + 3)" ),
test_expression( 3,"sum(3 + 2v0)" ),
test_expression( 6,"sum((2v0 + 3) * (2v0 + 3))" ),
test_expression( 6,"sum((3 + 2v0) * (3 + 2v0))" ),
test_expression( 2,"sum(v0 + v1)" ),
test_expression( 4,"sum((v0 + v1) * (v0 - v1))" ),
test_expression( 4,"sum(2v0 + 3v1)" ),
test_expression( 4,"sum((2v0 - v1 / v2))" ),
test_expression( 5,"sum(3(2v0 - v1 / v2))" ),
test_expression( 4,"sum(abs(v0 * v1) / v2)" ),
test_expression( 5,"sum(v0 + v1) + avg(v0 - v1)" ),
test_expression( 8,"7(sum(abs(5v0 * 3v1) / 2v2))" ),
test_expression( 9,"sum(2v0 + 3v1) + sum(4 / v0 - 5 / v1)"),
test_expression( 6,"sum(abs(v0 - v1) * abs(v1 - v0))" ),
test_expression( 8,"sum(abs(2v0 - v1) * abs(v1 - 2v0))" ),
test_expression(10,"sum(abs(2v0 - 3v1) * abs(3v1 - 5v0))" ),
test_expression( 2,"axpbz(2,v0,3,v1)" ),
test_expression( 2,"axpy(2,v0,v1)" ),
//test_expression( 4,"sum(v0^2.2 + v1^3.3)" ),
//test_expression( 4,"exp(-1 / (v0^2))" ),
//test_expression( 5,"exp(-1 / (v0^2)) / v1" )
};
const std::size_t global_expression_list_size = sizeof(global_expression_list) / sizeof(test_expression);
const std::size_t rounds = 2000;
typedef double numeric_type;
template <typename T>
double run_expression_benchmark(const std::size_t vec_size,
const std::string& expr_string,
const std::size_t& cost)
{
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
std::vector<T> v0(vec_size, T(2.1234567890));
std::vector<T> v1(vec_size, T(3.1234567890));
std::vector<T> v2(vec_size, T(5.1234567890));
exprtk::rtl::vecops::package<T> vecops_package;
symbol_table_t symbol_table;
symbol_table.add_vector("v0",v0);
symbol_table.add_vector("v1",v1);
symbol_table.add_vector("v2",v2);
symbol_table.add_package(vecops_package);
expression_t expression;
expression.register_symbol_table(symbol_table);
parser_t parser;
if (!parser.compile(expr_string,expression))
{
printf("[load_expression] - Parser Error: %s\tExpression: %s\n",
parser.error().c_str(),
expr_string.c_str());
return std::numeric_limits<double>::quiet_NaN();
}
exprtk::timer timer;
T total = T(0);
timer.start();
for (std::size_t r = 0; r < rounds; ++r)
{
total += expression.value();
}
timer.stop();
if (T(0) != total)
printf("Total Time:%10.7f Rate:%11.3fevals/sec Perf: %5.3fGFLOPS Expression: %s\n",
timer.time(),
rounds / timer.time(),
(rounds * vec_size * cost) / (1e+9 * timer.time()),
expr_string.c_str());
else
printf("run_expression_benchmark() - Error running benchmark for expression: %s\n",
expr_string.c_str());
return timer.time();
}
template <typename T>
void run_benchmark(const std::size_t& vec_size)
{
double total_time = 0.0;
for (std::size_t i = 0; i < global_expression_list_size; ++i)
{
total_time +=
run_expression_benchmark<T>(vec_size,
global_expression_list[i].e,
global_expression_list[i].cost);
}
unsigned long long total_flop = 0;
for (std::size_t i = 0; i < global_expression_list_size; ++i)
{
total_flop += global_expression_list[i].cost;
}
total_flop *= (rounds * vec_size);
printf("Total Time:%10.7f FLOP: %llu Perf: %7.4fGLOPS\n",
total_time,
total_flop,
total_flop / (1e9 * total_time));
}
template <typename T>
void run_file_benchmark(const std::size_t& vec_size, const std::string& file_name)
{
std::ifstream stream(file_name.c_str());
if (!stream)
{
printf("run_file_benchmark() - Failed to open file: %s\n",
file_name.c_str());
return;
}
std::string line;
std::vector<std::string> expr_list;
while (std::getline(stream, line))
{
if (line.empty())
continue;
else if ('#' == line[0])
continue;
expr_list.push_back(line);
}
T total_time = T(0);
for (std::size_t i = 0; i < expr_list.size(); ++i)
{
total_time += run_expression_benchmark<T>(vec_size,expr_list[i],0);
}
printf("Total Time:%10.7f\n", total_time);
}
int main(int argc, char* argv[])
{
const std::size_t vec_size = ((argc >= 2) ? atoi(argv[1]) : 100000);
const std::string file_name = ((argc > 3) ? argv[2] : "" );
switch (argc)
{
case 2 : run_benchmark <numeric_type>(vec_size ); break;
case 3 : run_file_benchmark<numeric_type>(vec_size,file_name); break;
}
return 0;
}