cpu-o3: set iewToFetchDelay = 2 as default

Change-Id: Id2fb11d63a7ba4cfcbb91a25b281bc8fcdbb1f4c

Author: jensen-yan

configs/example/idealkmhv3.py

@@ -29,7 +29,6 @@ def setKmhV3IdealParams(args, system):
         #cpu.mmu.itb.enable_l1_direct_compression = args.enable_l1_direct_compression
         #cpu.mmu.dtb.enable_l1_direct_compression = args.enable_l1_direct_compression
         cpu.fetchWidth = 32
-        cpu.iewToFetchDelay = 2 # for resolved update, should train branch after squash
         cpu.commitToFetchDelay = 2
         cpu.fetchQueueSize = 64
 

configs/example/kmhv3.py

@@ -28,7 +28,6 @@ def setKmhV3Params(args, system):
         cpu.mmu.itb.enable_l1_direct_compression = args.enable_l1_direct_compression
         cpu.mmu.dtb.enable_l1_direct_compression = args.enable_l1_direct_compression
         cpu.fetchWidth = 32
-        cpu.iewToFetchDelay = 2 # for resolved update, should train branch after squash
         cpu.commitToFetchDelay = 2
         cpu.fetchQueueSize = 64
 

src/cpu/o3/BaseO3CPU.py

@@ -120,8 +120,8 @@ def support_take_over(cls):
 
     decodeToFetchDelay = Param.Cycles(1, "Decode to fetch delay")
     renameToFetchDelay = Param.Cycles(1 ,"Rename to fetch delay")
-    iewToFetchDelay = Param.Cycles(1, "Issue/Execute/Writeback to fetch "
-                                   "delay")
+    iewToFetchDelay = Param.Cycles(2, "Issue/Execute/Writeback to fetch "
+                                   "delay") # for resolved update, should train branch after squash
     commitToFetchDelay = Param.Cycles(3, "Commit to fetch delay")
     fetchWidth = Param.Unsigned(16, "Fetch width")
     fetchBufferSize = Param.Unsigned(66, "Fetch buffer size in bytes")