[Boost-commit] svn:boost r59385 - in sandbox/chrono/libs/chrono: example test

Subject: [Boost-commit] svn:boost r59385 - in sandbox/chrono/libs/chrono: example test
From: vicente.botet_at_[hidden]
Date: 2010-01-31 17:12:47

Author: viboes
Date: 2010-01-31 17:12:47 EST (Sun, 31 Jan 2010)
New Revision: 59385
URL: http://svn.boost.org/trac/boost/changeset/59385

Log:
Boost.Chrono: Version 0.4.0, 
* Fix bug on timeval_demo. 
    time_point t(duration(xtime(0)));  // this was taken as a function declaration
    gettimeofday((timeval*)&t, 0);
    return t;
by
    timeval tv;
    gettimeofday(&tv, 0);
    xtime xt( tv.tv_sec, tv.tv_usec);
    return time_point(duration(xt));

* Fix bug on run_timer_test (add a global variable to avoid optimization that removes completely the code to be  measured

Text files modified: 
   sandbox/chrono/libs/chrono/example/timeval_demo.cpp |    16 +++++++++-------                        
   sandbox/chrono/libs/chrono/test/run_timer_test.cpp  |    12 +++++++-----                            
   2 files changed, 16 insertions(+), 12 deletions(-)

Modified: sandbox/chrono/libs/chrono/example/timeval_demo.cpp
==============================================================================
--- sandbox/chrono/libs/chrono/example/timeval_demo.cpp	(original)
+++ sandbox/chrono/libs/chrono/example/timeval_demo.cpp	2010-01-31 17:12:47 EST (Sun, 31 Jan 2010)
@@ -169,15 +169,17 @@
 xtime_clock::now()
 {
 #if defined(BOOST_CHRONO_WINDOWS_API)
-    time_point t(duration(xtime(0)));
-    gettimeofday((timeval*)&t, 0);
-    return t;
+    timeval tv;
+    gettimeofday(&tv, 0);
+    xtime xt( tv.tv_sec, tv.tv_usec);
+    return time_point(duration(xt));
 
 #elif defined(BOOST_CHRONO_MAC_API)
 
-    time_point t(duration(xtime(0)));
-    gettimeofday((timeval*)&t, 0);
-    return t;
+    timeval tv;
+    gettimeofday(&tv, 0);
+    xtime xt( tv.tv_sec, tv.tv_usec);
+    return time_point(duration(xt));
 
 #elif defined(BOOST_CHRONO_POSIX_API)
     //time_point t(0,0);
@@ -187,7 +189,6 @@
 
     xtime xt( ts.tv_sec, ts.tv_nsec/1000);
     return time_point(duration(xt));
-
 #endif  // POSIX
 
 }
@@ -201,6 +202,7 @@
     std::cout << "sizeof xtime_clock::rep = " << sizeof(xtime_clock::rep) << '\n';
     xtime_clock::duration delay(milliseconds(5));
     xtime_clock::time_point start = xtime_clock::now();
+
     while (xtime_clock::now() - start <= delay)
     {
     }

Modified: sandbox/chrono/libs/chrono/test/run_timer_test.cpp
==============================================================================
--- sandbox/chrono/libs/chrono/test/run_timer_test.cpp	(original)
+++ sandbox/chrono/libs/chrono/test/run_timer_test.cpp	2010-01-31 17:12:47 EST (Sun, 31 Jan 2010)
@@ -183,10 +183,10 @@
     std::cout << "process_timer_test..." << std::flush;
 
     boost::chrono::process_timer t;
-
+    double res; // avoids optimization 
     for (long i = 0; i < 10000000L; ++i)
     {
-      std::sqrt( static_cast<double>(i) );
+      res+=std::sqrt( static_cast<double>(i) ); // avoids optimization 
     }
 
     boost::chrono::process_times times;
@@ -200,12 +200,14 @@
     std::cout << "\n";
 
     std::cout << times.real.count() << " times.real\n";
+    std::cout << times.user.count() << " times.user\n";
+    std::cout << times.system.count() << " times.system\n";
+    std::cout << (times.user+times.system).count() << " times.user+system\n";
     BOOST_CHECK( times.real > ns(1) );
 
-    std::cout << times.user.count() << " times.user\n";
-    BOOST_CHECK( times.user > ns(1) );
+    BOOST_CHECK( times.user+times.system  > ns(1) );
 
-    std::cout << "complete" << std::endl;
+    std::cout << "complete " << res << std::endl;
   }
 }