126 lines
3.1 KiB
C++
126 lines
3.1 KiB
C++
//
|
|
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
#pragma once
|
|
|
|
#include "td/utils/format.h"
|
|
#include "td/utils/logging.h"
|
|
#include "td/utils/port/Clocks.h"
|
|
|
|
#include <cmath>
|
|
#include <tuple>
|
|
#include <utility>
|
|
|
|
#define BENCH(name, desc) \
|
|
class name##Bench : public ::td::Benchmark { \
|
|
public: \
|
|
std::string get_description() const override { \
|
|
return (desc); \
|
|
} \
|
|
void run(int n) override; \
|
|
}; \
|
|
void name##Bench::run(int n)
|
|
|
|
namespace td {
|
|
|
|
#if TD_MSVC
|
|
|
|
#pragma optimize("", off)
|
|
template <class T>
|
|
void do_not_optimize_away(T &&datum) {
|
|
datum = datum;
|
|
}
|
|
#pragma optimize("", on)
|
|
|
|
#else
|
|
|
|
template <class T>
|
|
void do_not_optimize_away(T &&datum) {
|
|
asm volatile("" : "+r"(datum));
|
|
}
|
|
|
|
#endif
|
|
|
|
class Benchmark {
|
|
public:
|
|
Benchmark() = default;
|
|
Benchmark(const Benchmark &) = delete;
|
|
Benchmark &operator=(const Benchmark &) = delete;
|
|
Benchmark(Benchmark &&) = delete;
|
|
Benchmark &operator=(Benchmark &&) = delete;
|
|
virtual ~Benchmark() = default;
|
|
|
|
virtual std::string get_description() const = 0;
|
|
|
|
virtual void start_up() {
|
|
}
|
|
virtual void start_up_n(int n) {
|
|
start_up();
|
|
}
|
|
|
|
virtual void tear_down() {
|
|
}
|
|
|
|
virtual void run(int n) = 0;
|
|
};
|
|
|
|
inline std::pair<double, double> bench_n(Benchmark &b, int n) {
|
|
double total = -Clocks::monotonic();
|
|
b.start_up_n(n);
|
|
double t = -Clocks::monotonic();
|
|
b.run(n);
|
|
t += Clocks::monotonic();
|
|
b.tear_down();
|
|
total += Clocks::monotonic();
|
|
|
|
return std::make_pair(t, total);
|
|
}
|
|
|
|
inline std::pair<double, double> bench_n(Benchmark &&b, int n) {
|
|
return bench_n(b, n);
|
|
}
|
|
|
|
inline void bench(Benchmark &b, double max_time = 1.0) {
|
|
int n = 1;
|
|
double pass_time = 0;
|
|
double total_pass_time = 0;
|
|
while (pass_time < max_time && total_pass_time < max_time * 3 && n < (1 << 30)) {
|
|
n *= 2;
|
|
std::tie(pass_time, total_pass_time) = bench_n(b, n);
|
|
}
|
|
pass_time = n / pass_time;
|
|
|
|
int pass_cnt = 2;
|
|
double sum = pass_time;
|
|
double square_sum = pass_time * pass_time;
|
|
double min_pass_time = pass_time;
|
|
double max_pass_time = pass_time;
|
|
|
|
for (int i = 1; i < pass_cnt; i++) {
|
|
pass_time = n / bench_n(b, n).first;
|
|
sum += pass_time;
|
|
square_sum += pass_time * pass_time;
|
|
if (pass_time < min_pass_time) {
|
|
min_pass_time = pass_time;
|
|
}
|
|
if (pass_time > max_pass_time) {
|
|
max_pass_time = pass_time;
|
|
}
|
|
}
|
|
double avg = sum / pass_cnt;
|
|
double d = sqrt(square_sum / pass_cnt - avg * avg);
|
|
|
|
LOG(ERROR, "Bench [%40s]:\t%.3lf[%.3lf-%.3lf] ops/sec,\t", b.get_description().c_str(), avg, min_pass_time,
|
|
max_pass_time)
|
|
<< format::as_time(1 / avg) << (PSLICE(" [d = %.6lf]", d));
|
|
}
|
|
|
|
inline void bench(Benchmark &&b, double max_time = 1.0) {
|
|
bench(b, max_time);
|
|
}
|
|
|
|
} // namespace td
|