ruby: replace g_ruby_start with per-RubySystem m_start_cycle

This patch begins the process of removing global variables from the Ruby
source with the goal of eventually allowing users to create multiple Ruby
instances in a single simulation.  Currently, users cannot do so because
several global variables and static members are referenced by the RubySystem
object in a way that assumes that there will only ever be a single RubySystem.
These need to be replaced with per-RubySystem equivalents.

This specific patch replaces the global var g_ruby_start, which is used
to calculate throughput statistics for Throttles in simple networks and
links in Garnet networks, with a RubySystem instance var m_start_cycle.

1 files changed, 5 insertions, 3 deletions

diff --git a/src/mem/ruby/network/simple/Throttle.hh b/src/mem/ruby/network/simple/Throttle.hh
index 797511702..19b0fcd35 100644
--- a/src/mem/ruby/network/simple/Throttle.hh
+++ b/src/mem/ruby/network/simple/Throttle.hh
@@ -52,11 +52,12 @@ class MessageBuffer;
 class Throttle : public Consumer
 {
   public:
-    Throttle(int sID, NodeID node, Cycles link_latency,
+    Throttle(int sID, RubySystem *rs, NodeID node, Cycles link_latency,
+             int link_bandwidth_multiplier, int endpoint_bandwidth,
+             ClockedObject *em);
+    Throttle(RubySystem *rs, NodeID node, Cycles link_latency,
              int link_bandwidth_multiplier, int endpoint_bandwidth,
              ClockedObject *em);
-    Throttle(NodeID node, Cycles link_latency, int link_bandwidth_multiplier,
-             int endpoint_bandwidth, ClockedObject *em);
     ~Throttle() {}
 
     std::string name()
@@ -103,6 +104,7 @@ class Throttle : public Consumer
     Cycles m_link_latency;
     int m_wakeups_wo_switch;
     int m_endpoint_bandwidth;
+    RubySystem *m_ruby_system;
 
     // Statistical variables
     Stats::Scalar m_link_utilization;