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timer/test/cpu_timer_test.cpp
Beman 8682840301 Revert "Create first merge point for Git" 
This reverts commit 01af50eb2a, reversing
changes made to b3cb84d8d0.

The reverted commit had the effect of backing out several previously committed fixes. Possibly operator error?
2013-12-28 09:11:49 -05:00

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7.8 KiB
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// boost timer_test.cpp --------------------------------------------------------------//
// Copyright Beman Dawes 2006, 2011
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
// See http://www.boost.org/libs/timer for documentation.
#include <boost/timer/timer.hpp>
#include <boost/detail/lightweight_main.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <cstdlib> // for atol()
#include <iostream>
#include <string>
#include <ctime>
using std::string;
using std::cout;
using std::endl;
using boost::timer::default_places;
using boost::timer::nanosecond_type;
using boost::timer::cpu_times;
using boost::timer::format;
using boost::timer::cpu_timer;
using boost::timer::auto_cpu_timer;
namespace
{
void unit_test()
{
cout << "unit test..." << endl;
string default_format(" %ws wall, %us user + %ss system = %ts CPU (%p%)\n");
// each constructor
auto_cpu_timer t1;
BOOST_TEST(!t1.is_stopped());
// the following, and similar below, are giving false failures on MinGW/gcc
// so comment them out for now
//BOOST_TEST(&t1.ostream() == &cout);
BOOST_TEST_EQ(t1.places(), default_places);
BOOST_TEST_EQ(t1.format_string(), default_format);
t1.stop();
BOOST_TEST(t1.is_stopped());
auto_cpu_timer t1a(t1);
BOOST_TEST(t1a.is_stopped());
BOOST_TEST_EQ(t1a.elapsed().wall, t1.elapsed().wall);
BOOST_TEST_EQ(t1a.elapsed().user, t1.elapsed().user);
BOOST_TEST_EQ(t1a.elapsed().system, t1.elapsed().system);
//BOOST_TEST(&t1a.ostream() == &cout);
BOOST_TEST_EQ(t1a.places(), default_places);
BOOST_TEST_EQ(t1a.format_string(), default_format);
auto_cpu_timer t1b;
BOOST_TEST(!t1b.is_stopped());
t1b = t1;
BOOST_TEST(t1b.is_stopped());
BOOST_TEST_EQ(t1b.elapsed().wall, t1.elapsed().wall);
BOOST_TEST_EQ(t1b.elapsed().user, t1.elapsed().user);
BOOST_TEST_EQ(t1b.elapsed().system, t1.elapsed().system);
//BOOST_TEST(&t1b.ostream() == &cout);
BOOST_TEST_EQ(t1b.places(), default_places);
BOOST_TEST_EQ(t1b.format_string(), default_format);
auto_cpu_timer t2(1);
BOOST_TEST(!t2.is_stopped());
//BOOST_TEST(&t2.ostream() == &cout);
BOOST_TEST_EQ(t2.places(), 1);
BOOST_TEST_EQ(t2.format_string(), default_format);
auto_cpu_timer t3("foo");
BOOST_TEST(!t3.is_stopped());
//BOOST_TEST(&t3.ostream() == &cout);
BOOST_TEST_EQ(t3.places(), default_places);
BOOST_TEST_EQ(t3.format_string(), string("foo"));
auto_cpu_timer t4(1, "foo");
BOOST_TEST(!t4.is_stopped());
//BOOST_TEST(&t4.ostream() == &cout);
BOOST_TEST_EQ(t4.places(), 1);
BOOST_TEST_EQ(t4.format_string(), string("foo"));
auto_cpu_timer t5(std::cerr);
BOOST_TEST(!t5.is_stopped());
BOOST_TEST(&t5.ostream() == &std::cerr);
BOOST_TEST_EQ(t5.places(), default_places);
BOOST_TEST_EQ(t5.format_string(), default_format);
auto_cpu_timer t6(std::cerr, 1);
BOOST_TEST(!t6.is_stopped());
BOOST_TEST(&t6.ostream() == &std::cerr);
BOOST_TEST_EQ(t6.places(), 1);
BOOST_TEST_EQ(t6.format_string(), default_format);
auto_cpu_timer t7(std::cerr, "foo");
BOOST_TEST(!t7.is_stopped());
BOOST_TEST(&t7.ostream() == &std::cerr);
BOOST_TEST_EQ(t7.places(), default_places);
BOOST_TEST_EQ(t7.format_string(), string("foo"));
auto_cpu_timer t8(std::cerr, 1, "foo");
BOOST_TEST(!t8.is_stopped());
BOOST_TEST(&t8.ostream() == &std::cerr);
BOOST_TEST_EQ(t8.places(), 1);
BOOST_TEST_EQ(t8.format_string(), string("foo"));
t1.stop();
t1a.stop();
t1b.stop();
t2.stop();
t3.stop();
t4.stop();
t5.stop();
t6.stop();
t7.stop();
t8.stop();
cout << " unit test complete" << endl;
}
void format_test()
{
cout << "format test..." << endl;
cpu_times times;
times.wall = 5123456789LL;
times.user = 2123456789LL;
times.system = 1234567890LL;
cout << " times.wall is " << times.wall << '\n';
cout << " times.user is " << times.user << '\n';
cout << " times.system is " << times.system << '\n';
cout << " user+system is " << times.user + times.system << '\n';
cout << " format(times, 9) output: " << format(times, 9);
BOOST_TEST_EQ(format(times, 9),
string(" 5.123456789s wall, 2.123456789s user + 1.234567890s system = 3.358024679s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 8),
string(" 5.12345679s wall, 2.12345679s user + 1.23456789s system = 3.35802468s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 7),
string(" 5.1234568s wall, 2.1234568s user + 1.2345679s system = 3.3580247s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 6),
string(" 5.123457s wall, 2.123457s user + 1.234568s system = 3.358025s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 5),
string(" 5.12346s wall, 2.12346s user + 1.23457s system = 3.35802s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 4),
string(" 5.1235s wall, 2.1235s user + 1.2346s system = 3.3580s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 3),
string(" 5.123s wall, 2.123s user + 1.235s system = 3.358s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 2),
string(" 5.12s wall, 2.12s user + 1.23s system = 3.36s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 1),
string(" 5.1s wall, 2.1s user + 1.2s system = 3.4s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 0),
string(" 5s wall, 2s user + 1s system = 3s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 10),
string(" 5.123456789s wall, 2.123456789s user + 1.234567890s system = 3.358024679s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, -1),
string(" 5.123457s wall, 2.123457s user + 1.234568s system = 3.358025s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times),
string(" 5.123457s wall, 2.123457s user + 1.234568s system = 3.358025s CPU (65.5%)\n"));
BOOST_TEST_EQ(format(times, 5, " %w, %u, %s, %t, %%p%"),
string(" 5.12346, 2.12346, 1.23457, 3.35802, %65.5%"));
BOOST_TEST_EQ(format(times, 5, "boo"), string("boo"));
cout << " format test complete" << endl;
}
void std_c_consistency_test()
{
cout << "C library consistency test..." << endl;
// This test is designed to account for C timer resolution and for the possibility
// that another active process may take up a lot of time.
cpu_timer t; // calls start(), so ensures any cpu_timer dll loaded
std::time(0); // ensure any system dll's loaded
std::time_t stop_time, start_time = std::time(0);
// wait until the time() clock ticks
while (std::time(0) == start_time) {}
// start both timers
start_time = std::time(0);
t.start();
// wait until the time() clock ticks again
while (std::time(0) == start_time) {}
// stop both timers
stop_time = std::time(0);
t.stop();
cout << " std::time() elapsed is " << (stop_time - start_time) * 1.0L << " seconds\n";
cout << " cpu_timer wall elapsed is " << t.elapsed().wall / 1000000000.0L << " seconds\n";
cout << " The two clocks whose elapsed time is compared by this test are started\n"
" and stopped one right after the other. If the operating system suspends\n"
" the process in the interim, the test may fail. Thus no single failure\n"
" of this test is meaningful.\n";
// These tests allow lots of fuzz to reduce false positives
BOOST_TEST(t.elapsed().wall / 1000000000.0L > (stop_time - start_time) * 0.75L);
BOOST_TEST(t.elapsed().wall / 1000000000.0L < (stop_time - start_time) * 1.25L);
cout << " C library consistency test complete" << endl;
}
} // unnamed namespace
//--------------------------------------------------------------------------------------//
int cpp_main(int, char *[])
{
cout << "---------- timer_test ----------\n";
unit_test();
format_test();
std_c_consistency_test();
return ::boost::report_errors();
}
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