cpu-o3: Gem5 idealkmhv3 Specification rollback

Change-Id: I78aa7d7003ee5c2b20391170c50bfe5b5b6d4512

Author: Ergou-ren

configs/example/idealkmhv3.py

@@ -34,7 +34,7 @@ def setKmhV3IdealParams(args, system):
         cpu.fetchQueueSize = 64
 
         # decode
-        cpu.fetchToDecodeDelay = 5
+        cpu.fetchToDecodeDelay = 6
         cpu.decodeWidth = 8
         cpu.enable_loadFusion = False
         cpu.enableConstantFolding = False
@@ -53,8 +53,8 @@ def setKmhV3IdealParams(args, system):
         cpu.scheduler = KMHV3Scheduler()
 
         # rob
-        cpu.commitWidth = 12
-        cpu.squashWidth = 12
+        cpu.commitWidth = 8
+        cpu.squashWidth = 8
         cpu.phyregReleaseWidth = 8
         cpu.RobCompressPolicy = 'kmhv3'
         cpu.numROBEntries = 160
@@ -72,16 +72,16 @@ def setKmhV3IdealParams(args, system):
         cpu.valuePred = IdealConstantLVP()
 
         # lsq
-        cpu.LQEntries = 128
+        cpu.LQEntries = 120
         cpu.SQEntries = 64
         cpu.RARQEntries = 96
         cpu.RAWQEntries = 56
         cpu.LoadCompletionWidth = 8
         cpu.StoreCompletionWidth = 4
         cpu.RARDequeuePerCycle = 4
         cpu.RAWDequeuePerCycle = 4
-        cpu.SbufferEntries = 24
-        cpu.SbufferEvictThreshold = 16
+        cpu.SbufferEntries = 16
+        cpu.SbufferEvictThreshold = 9
         cpu.store_prefetch_train = False
 
         # branch predictor
@@ -112,8 +112,9 @@ def setKmhV3IdealParams(args, system):
                 l2_wrapper.data_sram_banks = 2
                 l2_wrapper.dir_sram_banks = 2
                 l2_wrapper.pipe_dir_write_stage = 4
-                l2_wrapper.dir_read_bypass = True
+                l2_wrapper.dir_read_bypass = False
                 for j in range(args.l2_slices):
+                    l2_wrapper.slices[j].inner_cache.wpu = NULL
                     # Configure XSDRRIP replacement policy (DRRIP mode)
                     # Each slice: 2MB/4 = 512KB, 8-way, 64B line → 1024 sets
                     l2_wrapper.slices[j].inner_cache.replacement_policy = XSDRRIPRP(mode=2, num_sets=1024)
@@ -131,7 +132,8 @@ def setKmhV3IdealParams(args, system):
 
     # l3 cache
     if args.l3cache:
-        system.l3.mshrs = 128
+        system.l3.mshrs = 64
+        system.l3.num_slices = 4
 
 if __name__ == '__m5_main__':
     FutureClass = None