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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/* the following conditions:                                             */
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/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
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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 = 1000000;
    int threads = 10;
    int flush_interval = 0;
    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, flush every " << flush_interval << " lines"<< endl;
        cout << "*******************************************************************************\n";

        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st", file_size, rotating_files, flush_interval);
        bench(howmany, rotating_st);
        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st", flush_interval);
        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, flush every " << flush_interval << " lines" << endl;
        cout << "*******************************************************************************\n";

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


        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt", flush_interval);
        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, flush every " << flush_interval << " lines" << endl;
e	        cout << "*******************************************************************************\n";
		*/
		
        spdlog::set_async_mode(2500);
        auto daily_st_async = spdlog::daily_logger_st("daily_async", "logs/daily_async", flush_interval);
        bench_mt(howmany, daily_st_async, threads);


        spdlog::stop();

    }
    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;
}