ruby: change router pipeline stages to 2

This patch changes the router pipeline stages from 4 to 2. The
canonical 4-stage router is conservative while a lower-latency router
with look ahead routing and speculative allocation is well acknowledged.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mem/ruby/network/garnet/fixed-pipeline/VCallocator_d.cc b/src/mem/ruby/network/garnet/fixed-pipeline/VCallocator_d.cc
index 395b1a9c5..a7430b06e 100644
--- a/src/mem/ruby/network/garnet/fixed-pipeline/VCallocator_d.cc
+++ b/src/mem/ruby/network/garnet/fixed-pipeline/VCallocator_d.cc
@@ -117,6 +117,7 @@ VCallocator_d::wakeup()
 
     clear_request_vector();
     check_for_wakeup();
+    m_router->call_sw_alloc();
 }
 
 bool
@@ -236,7 +237,6 @@ VCallocator_d::arbitrate_outvcs()
                         m_router->curCycle());
                     m_output_unit[outport_iter]->update_vc(
                         outvc_iter, inport, invc);
-                    m_router->swarb_req();
                     break;
                 }
             }
@@ -261,7 +261,7 @@ VCallocator_d::check_for_wakeup()
     for (int i = 0; i < m_num_inports; i++) {
         for (int j = 0; j < m_num_vcs; j++) {
             if (m_input_unit[i]->need_stage(j, VC_AB_, VA_, nextCycle)) {
-                scheduleEvent(Cycles(1));
+                m_router->vcarb_req();
                 return;
             }
         }