This patch adds the network tester for simple and garnet networks.

The tester code is in testers/networktest.
The tester can be invoked by configs/example/ruby_network_test.py.
A dummy coherence protocol called Network_test is also addded for network-only simulations and testing. The protocol takes in messages from the tester and just pushes them into the network in the appropriate vnet, without storing any state.

6 files changed, 13 insertions, 23 deletions

diff --git a/src/mem/ruby/network/garnet/BaseGarnetNetwork.cc b/src/mem/ruby/network/garnet/BaseGarnetNetwork.cc
index 3e5e1cbe8..19b4c3d04 100644
--- a/src/mem/ruby/network/garnet/BaseGarnetNetwork.cc
+++ b/src/mem/ruby/network/garnet/BaseGarnetNetwork.cc
@@ -38,7 +38,6 @@ BaseGarnetNetwork::BaseGarnetNetwork(const Params *p)
     m_vcs_per_class = p->vcs_per_class;
     m_buffers_per_data_vc = p->buffers_per_data_vc;
     m_buffers_per_ctrl_vc = p->buffers_per_ctrl_vc;
-    m_using_network_testing = p->using_network_testing;
 }
 
 void
diff --git a/src/mem/ruby/network/garnet/BaseGarnetNetwork.hh b/src/mem/ruby/network/garnet/BaseGarnetNetwork.hh
index 4a1856e43..d01225232 100644
--- a/src/mem/ruby/network/garnet/BaseGarnetNetwork.hh
+++ b/src/mem/ruby/network/garnet/BaseGarnetNetwork.hh
@@ -36,6 +36,7 @@
 #ifndef __MEM_RUBY_NETWORK_GARNET_BASEGARNETNETWORK_HH__
 #define __MEM_RUBY_NETWORK_GARNET_BASEGARNETNETWORK_HH__
 
+#include "math.h"
 #include "mem/ruby/network/garnet/NetworkHeader.hh"
 #include "mem/ruby/network/Network.hh"
 #include "params/BaseGarnetNetwork.hh"
@@ -47,7 +48,6 @@ class BaseGarnetNetwork : public Network
     BaseGarnetNetwork(const Params *p);
 
     void init();
-    bool isNetworkTesting() {return m_using_network_testing; }
     int getFlitSize() {return m_flit_size; }
     int getNumPipeStages() {return m_number_of_pipe_stages; }
     int getVCsPerClass() {return m_vcs_per_class; }
@@ -60,7 +60,6 @@ class BaseGarnetNetwork : public Network
     int m_vcs_per_class;
     int m_buffers_per_data_vc;
     int m_buffers_per_ctrl_vc;
-    bool m_using_network_testing;
 };
 
 #endif // __MEM_RUBY_NETWORK_GARNET_BASEGARNETNETWORK_HH__
diff --git a/src/mem/ruby/network/garnet/BaseGarnetNetwork.py b/src/mem/ruby/network/garnet/BaseGarnetNetwork.py
index 44b6bd149..3594e93b6 100644
--- a/src/mem/ruby/network/garnet/BaseGarnetNetwork.py
+++ b/src/mem/ruby/network/garnet/BaseGarnetNetwork.py
@@ -39,4 +39,3 @@ class BaseGarnetNetwork(RubyNetwork):
     vcs_per_class = Param.Int(4, "virtual channels per message class");
     buffers_per_data_vc = Param.Int(4, "buffers per data virtual channel");
     buffers_per_ctrl_vc = Param.Int(1, "buffers per ctrl virtual channel");
-    using_network_testing = Param.Bool(False, "network testing enable");
diff --git a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
index dbfabc8f1..f0b8ccce7 100644
--- a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
+++ b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
@@ -307,15 +307,15 @@ GarnetNetwork_d::printStats(ostream& out) const
     }
     out << "-------------" << endl;
 
-    //      out << "Total flits injected = " << m_flits_injected << endl;
-    //      out << "Total flits received = " << m_flits_received << endl;
+    out << "Total flits injected = " << m_flits_injected << endl;
+    out << "Total flits received = " << m_flits_received << endl;
     out << "Average network latency = "
         << ((double) m_network_latency/ (double) m_flits_received)<< endl;
-    // out << "Average queueing latency = "
-    //    << ((double) m_queueing_latency/ (double) m_flits_received)<< endl;
-    // out << "Average latency = "
-    //    << ((double)  (m_queueing_latency + m_network_latency) /
-    //        (double) m_flits_received)<< endl;
+    out << "Average queueing (at source NI) latency = "
+        << ((double) m_queueing_latency/ (double) m_flits_received)<< endl;
+    out << "Average latency = "
+        << ((double)  (m_queueing_latency + m_network_latency) /
+            (double) m_flits_received)<< endl;
     out << "-------------" << endl;
 
     double m_total_link_power = 0.0;
diff --git a/src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc b/src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc
index 8299a294f..14105a38c 100644
--- a/src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc
+++ b/src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc
@@ -241,12 +241,9 @@ NetworkInterface_d::wakeup()
         bool free_signal = false;
         if (t_flit->get_type() == TAIL_ || t_flit->get_type() == HEAD_TAIL_) {
             free_signal = true;
-            // When we are doing network only testing, the messages do not
-            // have to be buffered into the protocol buffers
-            if (!m_net_ptr->isNetworkTesting()) {
-                outNode_ptr[t_flit->get_vnet()]->
-                    enqueue(t_flit->get_msg_ptr(), 1);
-            }
+
+            outNode_ptr[t_flit->get_vnet()]->enqueue(
+                t_flit->get_msg_ptr(), 1);
         }
         // Simply send a credit back since we are not buffering
         // this flit in the NI
diff --git a/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc b/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
index afc841a1b..60ec09e58 100644
--- a/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
+++ b/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
@@ -262,12 +262,8 @@ NetworkInterface::wakeup()
             DPRINTF(RubyNetwork, "m_id: %d, Message delivered at time: %lld\n",
                     m_id, g_eventQueue_ptr->getTime());
 
-            // When we are doing network only testing, the messages do not
-            // have to be buffered into the message buffers of the protocol
-            if (!m_net_ptr->isNetworkTesting()) {
-                outNode_ptr[t_flit->get_vnet()]->enqueue(
-                    t_flit->get_msg_ptr(), 1);
-            }
+            outNode_ptr[t_flit->get_vnet()]->enqueue(
+                t_flit->get_msg_ptr(), 1);
 
             // signal the upstream router that this vc can be freed now
             inNetLink->release_vc_link(t_flit->get_vc(),