mem-garnet,mem-ruby: Properly reset garnet2.0 statistics.

Statistics for crossbar activity, and link related statistics were not getting reset when using m5_reset_stats.

Change-Id: Ib84c55200e4a86c6f9190de28498112bd43dde9d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29253
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Srikant Bharadwaj <srikant.bharadwaj@amd.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/mem/ruby/network/garnet2.0/GarnetNetwork.cc

@@ -414,6 +414,20 @@ GarnetNetwork::collateStats()
     }
 }
 
+void
+GarnetNetwork::resetStats()
+{
+    for (int i = 0; i < m_routers.size(); i++) {
+        m_routers[i]->resetStats();
+    }
+    for (int i = 0; i < m_networklinks.size(); i++) {
+        m_networklinks[i]->resetStats();
+    }
+    for (int i = 0; i < m_creditlinks.size(); i++) {
+        m_creditlinks[i]->resetStats();
+    }
+}
+
 void
 GarnetNetwork::print(ostream& out) const
 {

src/mem/ruby/network/garnet2.0/GarnetNetwork.hh

@@ -101,6 +101,7 @@ class GarnetNetwork : public Network
     // Stats
     void collateStats();
     void regStats();
+    void resetStats();
     void print(std::ostream& out) const;
 
     // increment counters

src/mem/ruby/system/RubySystem.cc

@@ -407,6 +407,7 @@ void
 RubySystem::resetStats()
 {
     m_start_cycle = curCycle();
+    m_network->resetStats();
 }
 
 bool