Subversion Repositories openrisc_2011-10-31

// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option) any later

// version.

// This library 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 this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software

// is hereby granted without fee, provided that the above copyright

// notice appears in all copies, and that both that copyright notice

// and this permission notice appear in supporting documentation. None

// of the above authors, nor IBM Haifa Research Laboratories, make any

// representation about the suitability of this software for any

// purpose. It is provided "as is" without express or implied

// warranty.

/**

 * @file join_test.hpp

 * Contains a join performance test.

 */

#ifndef PB_DS_JOIN_TEST_HPP

#define PB_DS_JOIN_TEST_HPP

#include <performance/time/timing_test_base.hpp>

#include <ext/pb_ds/detail/type_utils.hpp>

#include <performance/io/xml_formatter.hpp>

#include <common_type/priority_queue/string_form.hpp>

#include <iterator>

namespace __gnu_pbds

{

  namespace test

  {

    namespace detail

    {

      template<typename It, typename Cntnr>

      class double_push_functor

      {

        const It _M_begin;

        const It _M_end;

      public:

        double_push_functor(It b,  It e) : _M_begin(b), _M_end(e) { }

        void

        operator()(std::size_t resolution)

        {

          typedef typename Cntnr::const_reference const_reference;

          for (std::size_t n = 0; n < resolution; ++n)

            {

              Cntnr c0;

              Cntnr c1;

              for (It it = _M_begin; it != _M_end; ++it)

                {

                  c0.push(const_reference(it->first));

                  c1.push(const_reference(it->first));

                }

            }

        }

      };

      template<typename It, typename Cntnr>

      class double_push_join_functor

      {

        const It _M_begin;

        const It _M_end;

      public:

        double_push_join_functor(It b,  It e) : _M_begin(b), _M_end(e) { }

        void

        operator()(std::size_t resolution)

        {

          typedef typename Cntnr::const_reference const_reference;

          for (std::size_t n = 0; n < resolution; ++n)

            {

              Cntnr c0;

              Cntnr c1;

              for (It it = _M_begin; it != _M_end; ++it)

                {

                  c0.push(const_reference(it->first));

                  c1.push(const_reference(it->first));

                }

              c0.join(c1);

            }

        }

      };

    } // namespace detail

    template<typename It>

    class join_test : private __gnu_pbds::test::detail::timing_test_base

    {

    public:

      join_test(It ins_b, size_t ins_vn, size_t ins_vs, size_t ins_vm)

      : m_ins_b(ins_b), m_ins_vn(ins_vn), m_ins_vs(ins_vs), m_ins_vm(ins_vm)

      { }

      template<typename Cntnr>

      void

      operator()(Cntnr)

      {

        using __gnu_pbds::test::detail::double_push_functor;

        using __gnu_pbds::test::detail::double_push_join_functor;

        typedef __gnu_pbds::test::detail::timing_test_base base_type;

        typedef double_push_functor<It, Cntnr> psh_fnct;

        typedef double_push_join_functor<It, Cntnr> psh_jn_fnct;

        typedef xml_result_set_performance_formatter formatter_type;

        formatter_type res(string_form<Cntnr>::name(),

                           string_form<Cntnr>::desc());

        for (size_t n = 0; m_ins_vn + n*  m_ins_vs < m_ins_vm; ++n)

          {

            const size_t v = m_ins_vn + n *  m_ins_vs;

            It b = m_ins_b;

            It e = m_ins_b;

            std::advance(e, v);

            psh_fnct double_push_fn(b, e);

            const double dbl_psh_res = base_type::operator()(double_push_fn);

            psh_jn_fnct dbl_psh_jn_fn(b, e);

            const double dbl_psh_jn_res = base_type::operator()(dbl_psh_jn_fn);

            const double min_res = double(timing_test_base::min_time_res());

            const double effective_delta = std::max(dbl_psh_jn_res - dbl_psh_res, min_res);

            res.add_res(v, effective_delta / v);

          }

      }

    private:

      join_test(const join_test&);

      template<typename Cntnr>

      void

      join(Cntnr, It b, It e)

      {

        Cntnr cntnr;

        typedef typename Cntnr::const_reference const_reference;

        for (It it = b; it != e; ++it)

          cntnr.join(const_reference(*it));

      }

      const It          m_ins_b;

      const size_t      m_ins_vn;

      const size_t      m_ins_vs;

      const size_t      m_ins_vm;

    };

  } // namespace test

} // namespace __gnu_pbds

#endif