spdlog/example/bench.cpp

/*************************************************************************/
/* spdlog - an extremely fast and easy to use c++11 logging library.     */
/* Copyright (c) 2014 Gabi Melman.                                       */
/*                                                                       */
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/*                                                                       */
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//
// bench.cpp : spdlog benchmarks
//
#include <iostream>
#include <memory>
#include <string>
#include <thread>
#include <atomic>
#include "spdlog/spdlog.h"
#include "spdlog/async_logger.h"
#include "spdlog/sinks/file_sinks.h"
#include "spdlog/sinks/null_sink.h"
#include "utils.h"


using namespace std;
using namespace std::chrono;
using namespace spdlog;
using namespace spdlog::sinks;
using namespace utils;


void bench(int howmany, std::shared_ptr<spdlog::logger> log);
void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);

int main(int argc, char* argv[])
{

	int howmany = 1048576;
	int threads = 10;
	bool auto_flush = false;
	int file_size = 30 * 1024 * 1024;
	int rotating_files = 5;

	try
	{

		if(argc > 1)
			howmany = atoi(argv[1]);
		if (argc > 2)
			threads =   atoi(argv[2]);


		cout << "*******************************************************************************\n";
		cout << "Single thread, " << format(howmany)  << " iterations, auto flush=" << auto_flush << endl;
		cout << "*******************************************************************************\n";

		auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st", file_size, rotating_files, auto_flush);
		bench(howmany, rotating_st);
		auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st", auto_flush);
		bench(howmany, daily_st);
		bench(howmany, spdlog::create<null_sink_st>("null_st"));

		cout << "\n*******************************************************************************\n";
		cout << threads << " threads sharing same logger, " << format(howmany)  << " iterations, auto_flush=" << auto_flush << endl;
		cout << "*******************************************************************************\n";

		auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt", file_size, rotating_files, auto_flush);
		bench_mt(howmany, rotating_mt, threads);


		auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt", auto_flush);
		bench_mt(howmany, daily_mt, threads);
		bench(howmany, spdlog::create<null_sink_st>("null_mt"));

		cout << "\n*******************************************************************************\n";
		cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " iterations, auto_flush=" << auto_flush << endl;
		cout << "*******************************************************************************\n";


		spdlog::set_async_mode(howmany);

		for(int i = 0; i < 3; ++i)
		{
			auto as = spdlog::daily_logger_st("as", "logs/daily_async", auto_flush);
			bench_mt(howmany, as, threads);
			spdlog::drop("as");
		}
	}
	catch (std::exception &ex)
	{
		std::cerr << "Error: " << ex.what() << std::endl;
		perror("Last error");
	}
	return 0;
}


void bench(int howmany, std::shared_ptr<spdlog::logger> log)
{
	cout << log->name() << "...\t\t" << flush;
	auto start = system_clock::now();
	for (auto i = 0; i < howmany; ++i)
	{
		log->info("Hello logger: msg number {}", i);
	}


	auto delta = system_clock::now() - start;
	auto delta_d = duration_cast<duration<double>> (delta).count();
	cout << format(int(howmany / delta_d)) << "/sec" << endl;
}


void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
{

	cout << log->name() << "...\t\t" << flush;
	std::atomic<int > msg_counter {0};
	vector<thread> threads;
	auto start = system_clock::now();
	for (int t = 0; t < thread_count; ++t)
	{
		threads.push_back(std::thread([&]()
		{
			for(;;)
			{
				int counter = ++msg_counter;
				if (counter > howmany) break;
				log->info("Hello logger: msg number {}", counter);
			}
		}));
	}


	for(auto &t:threads)
	{
		t.join();
	};


	auto delta = system_clock::now() - start;
	auto delta_d = duration_cast<duration<double>> (delta).count();
	cout << format(int(howmany / delta_d)) << "/sec" << endl;
}