void ConnMethodComparison() {
    gROOT->SetBatch(kTRUE);
    auto sel_filename = "./select_data_stats_1000desc_NOBLOCK_TIMEOUT_HARD.csv";
    auto sel_df = ROOT::RDF::MakeCsvDataFrame(sel_filename, true, ';');
    auto sel_nc = sel_df.Define("bandwidth", "( total_received_data/static_cast<double>(1024) ) / (time/1000)").Define("bf_kb", "buffer_size/static_cast<double>(1024)");

    auto epoll_filename = "./epoll_data_stats_1000_TIMEOUT_HARD.csv";
    auto epoll_df = ROOT::RDF::MakeCsvDataFrame(epoll_filename, true, ';');
    auto epoll_nc = epoll_df.Define("bandwidth", "( total_received_data/static_cast<double>(1024) ) / (time/1000)").Define("bf_kb", "buffer_size/static_cast<double>(1024)");

    auto canvas = new TCanvas("c", "c", 1400, 1000);
    //canvas->SetLogx();
    canvas->SetGrid();
    //canvas->SetLogy();

    auto sel_g = sel_nc.Graph("bf_kb", "bandwidth");
    sel_g->SetTitle("Select vs Epoll: 1000 clients (99.8% long timeouts);Buffer Size [kB];Bandwidth [kB/s]");
    sel_g->SetName("sel");
    sel_g->SetMarkerStyle(55);
    sel_g->SetMarkerSize(2);
    sel_g->SetMarkerColor(kBlue);
    sel_g->SetLineColor(kBlue);
    sel_g->SetLineWidth(2);


    //sel_g->GetXaxis()->SetLimits(-50,1000);
    sel_g->GetHistogram()->SetMinimum(0);
    sel_g->GetHistogram()->SetMaximum(7000);

    sel_g->DrawClone("ALP");

    auto epoll_g = epoll_nc.Graph("bf_kb", "bandwidth");
    epoll_g->SetTitle("Select vs Epoll: 1000 clients (99.8% long timeouts);Buffer Size [kB];Bandwidth [kB/s]");
    epoll_g->SetName("epoll");
    epoll_g->SetMarkerStyle(55);
    epoll_g->SetMarkerSize(2);
    epoll_g->SetMarkerColor(kRed);
    epoll_g->SetLineColor(kRed);
    epoll_g->SetLineWidth(2);


    //epoll_g->GetXaxis()->SetLimits(-50,1000);
    //epoll_g->GetHistogram()->SetMinimum(1e3);
    //epoll_g->GetHistogram()->SetMaximum(1e7);

    epoll_g->DrawClone("LP");

    //gStyle->SetLegendTextSize(0.01);

    auto leg = new TLegend(0.60,0.42,0.86,0.57);
    leg->SetHeader("Connection method", "c");
    leg->AddEntry("sel","Select","lp");
    leg->AddEntry("epoll","Epoll","lp");
    leg->Draw();

    //canvas->BuildLegend(0.65,0.2,0.86,0.32, "Connection Method");

    canvas->Print("Epoll_Select_1000_TIMEOUT_HARD.png");

    gROOT->SetBatch(kFALSE);
    gApplication->Terminate(0);
}