Move activity tracking code into its own class. Now the CPU no longer has to keep track of the activity tracking internals; it just calls advance() on the class and uses it to tell if it should deschedule itself.

SConscript:
    Split off activity/idling code into its own class to do the processing separately.
cpu/o3/alpha_cpu_builder.cc:
cpu/o3/alpha_params.hh:
    Activity stuff.  This is mostly for debugging and may be removed later on (or changed to enable/disable activity idling).
cpu/o3/cpu.cc:
    Move activity idling stuff mostly into its own class, so it no longer clutters this file.
cpu/o3/cpu.hh:
    Move activity idling stuff into its own class.
python/m5/objects/AlphaFullCPU.py:
    Add parameter for initial activity value.

--HG--
extra : convert_revision : f32f7cc03895dc07ab57ddba78c5402a1a8b0f1a

python/m5/objects/AlphaFullCPU.py

@@ -3,7 +3,7 @@ from BaseCPU import BaseCPU
 
 class DerivAlphaFullCPU(BaseCPU):
     type = 'DerivAlphaFullCPU'
-
+    activity = Param.Unsigned("Initial count")
     numThreads = Param.Unsigned("number of HW thread contexts")
 
     if not build_env['FULL_SYSTEM']: