ifs_test: update

#include <unistd.h>

#include <fstream>

#include <fcntl.h>

#include <sys/stat.h>

#include <chrono>

using namespace std;

int main() {

using ns = chrono::nanoseconds;

using get_time = chrono::steady_clock;

//    std::fstream fs;

//    fs.open("testcpp_open.txt", std::fstream::in | std::fstream::out | std::fstream::app);

//

//    fs << "lorem ipsum";

//    fs.close();

//    ofstream ofs("/tmp/test_ofstream");

//

//    ofs << "lorem upsum";

//    ofs.close();

//

//    auto buf = "BUFFERINO2";

//    auto fd2 = open("/tmp/test_open.txt", O_WRONLY|O_CREAT|O_TRUNC,0666);

//    write(fd2, buf, 9);

//    cout << close(fd2) << endl;

//    auto fd3 = fopen("test_fopen", "w");

//    fputs(buf, fd3);

//    fclose(fd3);

int main() {

//    for (int i = 0; i < 200; ++i) {

//        printf("%d\n", i);

//        auto fd = open("test2.txt", O_WRONLY);

//        write(fd, buf, 9);

//        close(fd);

//        sleep(1);

//    }

    auto buf = "BUFFERINO2";

//    cout << mkdir("/tmp/mountdir/bla", 0775) << endl;

//    auto buf = "BUFFERINO2";

//    struct stat attr;

//    cout << creat("/tmp/mountdir/creat.txt", 0666) << endl;

//    cout << creat("/tmp/mountdir/#test-dir.0/mdtest_tree.0/file.mdtest.0000000.0000000005", 0666) << endl;

//    cout << stat("/tmp/mountdir/creat.txt", &attr) << endl;

//    cout << unlink("/tmp/mountdir/creat.txt") << endl;

//    auto pid = fork();

//    if (pid == 0) {

        auto fd2 = open("/tmp/child_open.txt", O_WRONLY|O_CREAT|O_TRUNC,0666);

        write(fd2, buf, 9);

        cout << close(fd2) << endl;

//        auto fd2 = open("/tmp/child_open.txt", O_WRONLY|O_CREAT|O_TRUNC,0666);

//        write(fd2, buf, 9);

//        cout << close(fd2) << endl;

//    } else if (pid > 0) {

//        auto fd3 = open("/tmp/parent_open.txt", O_WRONLY|O_CREAT|O_TRUNC,0666);

//        write(fd3, buf, 9);

//        return 1;

//    }

    int filen = 3;

    auto start_t = get_time::now();

    for (int i = 0; i < filen; ++i) {

        string p = "/tmp/mountdir/file2" + to_string(i);

        creat(p.c_str(), 0666);

        if (i % 25000 == 0)

            cout << i << " files processed.2" << endl;

//        cout << p << endl;

    }

    auto end_t = get_time::now();

    auto diff = end_t - start_t;

    auto diff_count = chrono::duration_cast<ns>(diff).count();

    cout << diff_count << "ns\t" << (diff_count) / 1000000. << "ms" << endl;

    cout << filen / ((diff_count) / 1000000000.) << " files per second" << endl;

    cout << "done" << endl;

//    cout << "done" << endl;

    return 0;

}

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