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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libstdc++-v3/testsuite/util/performance/time
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Diffstat (limited to 'libstdc++-v3/testsuite/util/performance/time')
-rw-r--r--libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc68
-rw-r--r--libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp67
-rw-r--r--libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp117
3 files changed, 252 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc
new file mode 100644
index 000000000..6b46402fe
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc
@@ -0,0 +1,68 @@
+// -*- 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 elapsed_timer.cpp
+ * Contains utilities for tests.
+ */
+
+#include <util/performance/time/elapsed_timer.hpp>
+
+namespace __gnu_pbds
+{
+
+ namespace test
+ {
+
+ elapsed_timer::
+ elapsed_timer()
+ {
+ reset();
+ }
+
+ void
+ elapsed_timer::
+ reset()
+ {
+ m_start = ::clock();
+ }
+
+ elapsed_timer::
+ operator double() const
+ {
+ const clock_t now = ::clock();
+
+ return (((double)now - m_start) / CLOCKS_PER_SEC);
+ }
+
+ } // namespace test
+
+} // namespace __gnu_pbds
diff --git a/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp
new file mode 100644
index 000000000..5f7937b92
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp
@@ -0,0 +1,67 @@
+// -*- 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 elapsed_timer.hpp
+ * Contains time utilities for tests.
+ */
+
+#ifndef PB_DS_TEST_TIME_HPP
+#define PB_DS_TEST_TIME_HPP
+
+#include <time.h>
+#include <iosfwd>
+
+namespace __gnu_pbds
+{
+
+ namespace test
+ {
+
+ class elapsed_timer
+ {
+ public:
+ elapsed_timer();
+
+ void
+ reset();
+
+ operator double() const;
+
+ protected:
+ clock_t m_start;
+ };
+
+ } // namespace test
+
+} // namespace __gnu_pbds
+
+#endif // #ifndef PB_DS_TEST_TIME_HPP
diff --git a/libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp b/libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp
new file mode 100644
index 000000000..961583273
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp
@@ -0,0 +1,117 @@
+// -*- 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 timing_test_base.hpp
+ * Contains a base class for timing tests.
+ */
+
+#ifndef PB_DS_TIMING_TEST_BASE_HPP
+#define PB_DS_TIMING_TEST_BASE_HPP
+
+#include <performance/time/elapsed_timer.hpp>
+#include <statistic/result_recorder.hpp>
+
+namespace __gnu_pbds
+{
+ namespace test
+ {
+ namespace detail
+ {
+ class timing_test_base
+ {
+ protected:
+ template<typename Functor>
+ double
+ operator()(Functor& fn);
+
+ static double
+ min_time_res();
+
+ private:
+ template<typename Functor>
+ std::size_t
+ get_min_resolution(Functor&);
+
+ template<typename Functor>
+ double
+ run_at_resolution(Functor&, std::size_t);
+ };
+
+ template<typename Functor>
+ double
+ timing_test_base::operator()(Functor& fn)
+ {
+ const std::size_t resolution = get_min_resolution(fn);
+ __gnu_pbds::test::detail::result_recorder<double> rec;
+ double res;
+ do
+ res = run_at_resolution(fn, resolution);
+ while (rec.add_result(res) == false);
+ res = rec.get_sample_mean() / resolution;
+ return res;
+ }
+
+ double
+ timing_test_base::min_time_res()
+ { return 1e-7; }
+
+ template<typename Functor>
+ std::size_t
+ timing_test_base::get_min_resolution(Functor& fn)
+ {
+ std::size_t guess = 0;
+ const double epsilon_val = min_time_res();
+ double res;
+ do
+ {
+ guess = guess * 2 + 1;
+ res = run_at_resolution(fn, guess);
+ }
+ while (res < epsilon_val);
+ return guess;
+ }
+
+ template<typename Functor>
+ double
+ timing_test_base::run_at_resolution(Functor& fn, std::size_t resolution)
+ {
+ elapsed_timer res;
+ fn(resolution);
+ return res;
+ }
+
+ } // namespace detail
+ } // namespace test
+} // namespace __gnu_pbds
+
+#endif
+