1 files changed, 0 insertions, 232 deletions
diff --git a/performance-tests/Misc/test_mutex.cpp b/performance-tests/Misc/test_mutex.cpp
deleted file mode 100644
index e854af98755..00000000000
--- a/performance-tests/Misc/test_mutex.cpp
+++ /dev/null
@@ -1,232 +0,0 @@
-// $Id$
-
-// This test program illustrates the performance difference between
-// three versions of wrappers for thread mutexes.  These three
-// versions exercise various combinations of the following classes:
-// 
-// Thread_Mutex --
-//    This version is just like ACE_Thread_Mutex, which doesn't use
-//    inheritance and dynamic binding.
-// 
-// Mutex_Base --
-//    This is an abstract base class that defines the
-//    acquire()/release() interface.
-// 
-// Thread_Mutex_Derived --
-//    This derived from Mutex_Base and uses inheritance and
-//    dynamic binding.
-// 
-// The following are the results I got when running this on our
-// SPARCstation 20 model 712:
-//
-// ./test_mutex 1000000
-// iterations = 1000000
-// Thread_Mutex
-// real time = 1.727843 secs, user time = 1.729262 secs, system time = 0.000325 secs
-// time per call = 1.747843 usecs
-// Thread_Mutex_Derived
-// real time = 1.730225 secs, user time = 1.724744 secs, system time = 0.000096 secs
-// time per call = 1.730225 usecs
-// Mutex_Base
-// real time = 2.112831 secs, user time = 2.104245 secs, system time = 0.000095 secs
-// time per call = 2.112831 usecs
-//
-// My conclusions are as follows:
-// 
-// 1. If your C++ compiler optimizes calls to virtual functions that
-//    are made through instances of derived classes, then the
-//    performance of the Thread_Mutex and Thread_Mutex_Derived are
-//    essentially identical.
-// 
-// 2. The overhead from using virtual functions is approximately
-//    20%.  Naturally, as the amount of contention goes up, the
-//    relative overhead of the virtual function calls will decrease.
-//
-// Keep in mind, however, that using virtual functions to implement
-// the Thread_Mutex will make it infeasible to put instances of
-// Thread_Mutex into shared memory since the vptrs won't point to the
-// correct vtables...
-
-#include "ace/Log_Msg.h"
-#include "ace/Profile_Timer.h"
-#include "ace/OS.h"
-
-ACE_RCSID(Misc, test_mutex, "$Id$")
-
-#if defined (ACE_HAS_THREADS)
-
-static const int DEFAULT_ITERATIONS = 100000000;
-
-// A thread mutex that doesn't use virtual functions.
-class Thread_Mutex
-{
-public:
-  Thread_Mutex (void);
-  ~Thread_Mutex (void);
-  int acquire (void);
-  int release (void);
-
-private:
-  ACE_mutex_t mutex_;
-};
-
-Thread_Mutex::Thread_Mutex (void)
-{
-  ACE_OS::mutex_init (&this->mutex_);
-}
-
-Thread_Mutex::~Thread_Mutex (void)
-{
-  ACE_OS::mutex_destroy (&this->mutex_);
-}
-
-inline int
-Thread_Mutex::acquire (void)
-{
-  return ACE_OS::mutex_lock (&this->mutex_);
-}
-
-inline int
-Thread_Mutex::release (void)
-{
-  return ACE_OS::mutex_unlock (&this->mutex_);
-}
-
-// Base class for mutex, declares pure virtual functions.
-class Mutex_Base
-{
-public:
-  virtual int acquire (void) = 0;
-  virtual int release (void) = 0;
-};
-
-// Subclass for threaded mutex, defines virtual functions.
-class Thread_Mutex_Derived : public Mutex_Base
-{
-public:
-  Thread_Mutex_Derived (void);
-  virtual ~Thread_Mutex_Derived (void);
-  virtual int acquire (void);
-  virtual int release (void);
-
-private:
-  ACE_mutex_t mutex_;
-};
-
-Thread_Mutex_Derived::Thread_Mutex_Derived (void)
-{
-  ACE_OS::mutex_init (&this->mutex_);
-}
-
-Thread_Mutex_Derived::~Thread_Mutex_Derived (void)
-{
-  ACE_OS::mutex_destroy (&this->mutex_);
-}
-
-inline int
-Thread_Mutex_Derived::acquire (void)
-{
-  return ACE_OS::mutex_lock (&this->mutex_);
-}
-
-inline int
-Thread_Mutex_Derived::release (void)
-{
-  return ACE_OS::mutex_unlock (&this->mutex_);
-}
-
-static Thread_Mutex thread_mutex;
-static Thread_Mutex_Derived thread_mutex_derived;
-static Mutex_Base *mutex_base = &thread_mutex_derived;
-
-int 
-main (int argc, char *argv[])
-{
-  ACE_Profile_Timer timer;
-  int iterations = argc > 1 ? ACE_OS::atoi (argv[1]) : DEFAULT_ITERATIONS;
-  int i;
-
-  ACE_DEBUG ((LM_DEBUG, "iterations = %d\n", iterations));
-
-  timer.start ();
-
-  // Test the thread mutex (which doesn't use inheritance or dynamic
-  // binding).
-
-  for (i = 0; i < iterations; i++)
-    {
-      thread_mutex.acquire ();
-      thread_mutex.release ();
-    }
-
-  timer.stop ();
-
-  ACE_Profile_Timer::ACE_Elapsed_Time et;
-
-  timer.elapsed_time (et);
-
-  ACE_DEBUG ((LM_DEBUG, "Thread_Mutex\n"));
-  ACE_DEBUG ((LM_DEBUG, "real time = %f secs, user time = %f secs, system time = %f secs\n",
-	      et.real_time, et.user_time, et.system_time));
-
-  ACE_DEBUG ((LM_DEBUG, "time per call = %f usecs\n", 
-	      (et.real_time / double (iterations)) * 1000000));
-
-  // Test the thread mutex derived (which does use inheritance or
-  // dynamic binding).  Note that we call this via an instance of the
-  // derived class, so good C++ compilers should optimize the virtual
-  // function calls in this case.
-
-  timer.start ();
-
-  for (i = 0; i < iterations; i++)
-    {
-      thread_mutex_derived.acquire ();
-      thread_mutex_derived.release ();
-    }
-
-  timer.stop ();
-
-  timer.elapsed_time (et);
-
-  ACE_DEBUG ((LM_DEBUG, "Thread_Mutex_Derived\n"));
-  ACE_DEBUG ((LM_DEBUG, "real time = %f secs, user time = %f secs, system time = %f secs\n",
-	      et.real_time, et.user_time, et.system_time));
-
-  ACE_DEBUG ((LM_DEBUG, "time per call = %f usecs\n", 
-	      (et.real_time / double (iterations)) * 1000000));
-
-  // Test the thread mutex derived (which does use inheritance or
-  // dynamic binding).  Note that we call this via a pointer to the
-  // base class, which points to an instance of the derived class.
-  // Thus, C++ compilers won't be able to optimize the virtual
-  // function calls in this case.
-
-  timer.start ();
-
-  for (i = 0; i < iterations; i++)
-    {
-      mutex_base->acquire ();
-      mutex_base->release ();
-    }
-
-  timer.stop ();
-
-  timer.elapsed_time (et);
-
-  ACE_DEBUG ((LM_DEBUG, "Mutex_Base\n"));
-  ACE_DEBUG ((LM_DEBUG, "real time = %f secs, user time = %f secs, system time = %f secs\n",
-	      et.real_time, et.user_time, et.system_time));
-
-  ACE_DEBUG ((LM_DEBUG, "time per call = %f usecs\n", 
-	      (et.real_time / double (iterations)) * 1000000));
-  return 0;
-}
-#else
-int 
-main (int, char *[])
-{
-  ACE_ERROR ((LM_ERROR, "threads not supported on this platform\n"));
-  return 0;
-}
-#endif /* ACE_HAS_THREADS */