diff -r 2528c94043ac -r d3ead01d8747 src/mem/ruby/slicc_interface/AbstractController.hh
--- a/src/mem/ruby/slicc_interface/AbstractController.hh	Thu Mar 19 14:51:39 2015 -0500
+++ b/src/mem/ruby/slicc_interface/AbstractController.hh	Sat Mar 21 14:09:40 2015 -0500
@@ -205,6 +205,9 @@
     // memory controller.
     MessageBuffer *m_responseFromMemory_ptr;
 
+    // Needed so we know if we are warming up
+    RubySystem *m_rubySystem;
+
     // State that is stored in packets sent to the memory controller.
     struct SenderState : public Packet::SenderState
     {
diff -r 2528c94043ac -r d3ead01d8747 src/mem/ruby/slicc_interface/AbstractController.cc
--- a/src/mem/ruby/slicc_interface/AbstractController.cc	Thu Mar 19 14:51:39 2015 -0500
+++ b/src/mem/ruby/slicc_interface/AbstractController.cc	Sat Mar 21 14:09:40 2015 -0500
@@ -40,7 +40,8 @@
       m_transitions_per_cycle(p->transitions_per_cycle),
       m_buffer_size(p->buffer_size), m_recycle_latency(p->recycle_latency),
       memoryPort(csprintf("%s.memory", name()), this, ""),
-      m_responseFromMemory_ptr(new MessageBuffer())
+      m_responseFromMemory_ptr(new MessageBuffer()),
+      m_rubySystem(p->ruby_system)
 {
     // Set the sender pointer of the response message buffer from the
     // memory controller.
@@ -217,6 +218,13 @@
     SenderState *s = new SenderState(id);
     pkt->pushSenderState(s);
 
+    // Use functional rather than timing accesses during warmup
+    if (m_rubySystem->m_warmup_enabled) {
+        memoryPort.sendFunctional(pkt);
+        recvTimingResp(pkt);
+        return;
+    }
+
     memoryPort.schedTimingReq(pkt, clockEdge(latency));
 }
 
@@ -237,6 +245,13 @@
     SenderState *s = new SenderState(id);
     pkt->pushSenderState(s);
 
+    // Use functional rather than timing accesses during warmup
+    if (m_rubySystem->m_warmup_enabled) {
+        memoryPort.sendFunctional(pkt);
+        recvTimingResp(pkt);
+        return;
+    }
+
     // Create a block and copy data from the block.
     memoryPort.schedTimingReq(pkt, clockEdge(latency));
 }