Stats.cpp

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/*
        This file is part of cpp-ethereum.

        cpp-ethereum is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        cpp-ethereum is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <test/libtesteth/Stats.h>
#include <test/libtesteth/Options.h>
#include <iterator>
#include <numeric>
#include <fstream>

namespace dev
{
namespace test
{

Stats& Stats::get()
{
        static Stats instance;
        return instance;
}

void Stats::suiteStarted(std::string const& _name)
{
        m_currentSuite = _name;
}

void Stats::testStarted(std::string const& _name)
{
        m_currentTest = _name;
        m_tp = clock::now();
}

void Stats::testFinished(int64_t _gasUsed)
{
        m_stats.push_back({clock::now() - m_tp, _gasUsed, m_currentSuite + "/" + m_currentTest});
}

std::ostream& operator<<(std::ostream& out, Stats::clock::duration const& d)
{
        return out << std::setw(10) << std::right << std::chrono::duration_cast<std::chrono::microseconds>(d).count() << " us";
}

Stats::~Stats()
{
        if (m_stats.empty())
                return;

        std::sort(m_stats.begin(), m_stats.end(), [](Stats::Item const& a, Stats::Item const& b){
                return a.duration < b.duration;
        });

        auto& out = std::cout;
        auto itr = m_stats.begin();
        auto min = *itr;
        auto max = *m_stats.rbegin();
        std::advance(itr, m_stats.size() / 2);
        auto med = *itr;
        auto tot = std::accumulate(m_stats.begin(), m_stats.end(), clock::duration{}, [](clock::duration const& a, Stats::Item const& v)
        {
                return a + v.duration;
        });

        out << "\nSTATS:\n\n" << std::setfill(' ');

        if (Options::get().statsOutFile == "out")
        {
                for (auto&& s: m_stats)
                {
                        auto usecs = std::chrono::duration_cast<std::chrono::microseconds>(s.duration).count();
                        out << "  " << std::setw(40) << std::left << s.name.substr(0, 40) << s.duration;
                        if (s.gasUsed >= 0)
                        {
                                auto gasRate = uint64_t(double(s.gasUsed) * 1000 / usecs);
                                out << "\t" << std::setw(10) << std::right  << gasRate << " gas/ms\n";
                        }
                        else
                                out << "\tOOG\n";
                }
                out << "\n";
        }
        else if (!Options::get().statsOutFile.empty())
        {
                // Output stats to file
                std::ofstream file{Options::get().statsOutFile};
                for (auto&& s: m_stats)
                {
                        auto usecs = std::chrono::duration_cast<std::chrono::microseconds>(s.duration).count();
                        file << s.name << "\t" << usecs;
                        if (s.gasUsed >= 0)
                        {
                                auto gasRate = s.gasUsed / usecs;
                                file << "\t" << gasRate << " gas/us\n";
                        }
                        else
                                file << "\tOOG\n";
                }
        }

        out     << "  tot: " << tot << "\n"
                << "  avg: " << (tot / m_stats.size()) << "\n\n"
                << "  min: " << min.duration << " (" << min.name << ")\n"
                << "  med: " << med.duration << " (" << med.name << ")\n"
                << "  max: " << max.duration << " (" << max.name << ")\n";
}

}
}