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diff --git a/src/mem/ruby/tester/RaceyDriver.cc b/src/mem/ruby/tester/RaceyDriver.cc
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+++ b/src/mem/ruby/tester/RaceyDriver.cc
@@ -0,0 +1,139 @@
+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * $Id$
+ *
+ */
+
+#include "Global.hh"
+#include "System.hh"
+#include "RaceyDriver.hh"
+#include "EventQueue.hh"
+#include "RaceyPseudoThread.hh"
+#include "SubBlock.hh"
+
+RaceyDriver::RaceyDriver()
+{
+  if (g_SIMICS) {
+    ERROR_MSG("g_SIMICS should not be defined.");
+  }
+
+  // debug transition?
+  if(false) {
+    assert(g_debug_ptr);
+    g_debug_ptr->setDebugTime(1);
+  }
+
+  m_finish_time = 0;
+  m_done_counter = 0;
+  m_wakeup_thread0 = false;
+
+  // racey at least need two processors
+  assert(RubyConfig::numberOfProcessors() >= 2);
+
+  // init all racey pseudo threads
+  m_racey_pseudo_threads.setSize(RubyConfig::numberOfProcessors());
+  for (int i=0; i<m_racey_pseudo_threads.size(); i++) {
+    m_racey_pseudo_threads[i] = new RaceyPseudoThread(i, *this);
+  }
+
+  // add this driver to the global event queue, for deadlock detection
+  g_eventQueue_ptr->scheduleEvent(this, g_DEADLOCK_THRESHOLD);
+}
+
+RaceyDriver::~RaceyDriver()
+{
+  for (int i=0; i<m_racey_pseudo_threads.size(); i++) {
+    delete m_racey_pseudo_threads[i];
+  }
+}
+
+void RaceyDriver::hitCallback(NodeID proc, SubBlock& data, CacheRequestType type, int thread)
+{
+  DEBUG_EXPR(TESTER_COMP, MedPrio, data);
+  m_racey_pseudo_threads[proc]->performCallback(proc, data);
+}
+
+integer_t RaceyDriver::getInstructionCount(int procID) const
+{
+  return m_racey_pseudo_threads[procID]->getInstructionCounter();
+}
+
+int RaceyDriver::runningThreads()
+{
+  return RubyConfig::numberOfProcessors() - m_done_counter;
+}
+
+// used to wake up thread 0 whenever other thread finishes
+void RaceyDriver::registerThread0Wakeup()
+{
+  m_wakeup_thread0 = true;
+}
+
+void RaceyDriver::joinThread()
+{
+  m_done_counter++;
+  if (m_done_counter == RubyConfig::numberOfProcessors()) {
+    m_finish_time = g_eventQueue_ptr->getTime();
+  }
+
+  if(m_wakeup_thread0) {
+    g_eventQueue_ptr->scheduleEvent(m_racey_pseudo_threads[0], 1);
+    m_wakeup_thread0 = false;
+  }
+}
+
+void RaceyDriver::wakeup()
+{
+  // check for deadlock
+  for(int i = 0 ; i < m_racey_pseudo_threads.size(); i++) {
+    m_racey_pseudo_threads[i]->checkForDeadlock();
+  }
+
+  // schedule next wakeup
+  if (m_done_counter < RubyConfig::numberOfProcessors()) {
+    g_eventQueue_ptr->scheduleEvent(this, g_DEADLOCK_THRESHOLD);
+  }
+}
+
+void RaceyDriver::printStats(ostream& out) const
+{
+  assert(m_done_counter == RubyConfig::numberOfProcessors());
+  out << endl;
+  out << "RaceyDriver Stats" << endl;
+  out << "---------------------" << endl;
+
+  out << "execution signature: " << m_racey_pseudo_threads[0]->getSignature() << endl;
+  out << "finish_time: " << m_finish_time << endl;
+}
+
+void RaceyDriver::print(ostream& out) const
+{
+}