Major changes to how SimObjects are created and initialized. Almost all
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
This commit is contained in:
Nathan Binkert
@@ -27,19 +27,10 @@
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# Authors: Nathan Binkert
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# Steve Reinhardt
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import atexit
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import os
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import sys
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# import the SWIG-wrapped main C++ functions
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import internal
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# import a few SWIG-wrapped items (those that are likely to be used
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# directly by user scripts) completely into this module for
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# convenience
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import event
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# import the m5 compile options
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import defines
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import smartdict
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# define a MaxTick parameter
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MaxTick = 2**63 - 1
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@@ -69,178 +60,12 @@ def AddToPath(path):
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sys.path.insert(1, path)
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# make a SmartDict out of the build options for our local use
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import smartdict
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build_env = smartdict.SmartDict()
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build_env.update(defines.m5_build_env)
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# make a SmartDict out of the OS environment too
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env = smartdict.SmartDict()
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env.update(os.environ)
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# The final hook to generate .ini files. Called from the user script
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# once the config is built.
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def instantiate(root):
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# we need to fix the global frequency
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ticks.fixGlobalFrequency()
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root.unproxy_all()
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# ugly temporary hack to get output to config.ini
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sys.stdout = file(os.path.join(options.outdir, 'config.ini'), 'w')
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root.print_ini()
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sys.stdout.close() # close config.ini
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sys.stdout = sys.__stdout__ # restore to original
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# load config.ini into C++
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internal.core.loadIniFile(resolveSimObject)
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# Initialize the global statistics
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internal.stats.initSimStats()
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# Create the C++ sim objects and connect ports
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root.createCCObject()
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root.connectPorts()
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# Do a second pass to finish initializing the sim objects
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internal.sim_object.initAll()
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# Do a third pass to initialize statistics
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internal.sim_object.regAllStats()
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# Check to make sure that the stats package is properly initialized
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internal.stats.check()
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# Reset to put the stats in a consistent state.
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internal.stats.reset()
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def doDot(root):
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dot = pydot.Dot()
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instance.outputDot(dot)
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dot.orientation = "portrait"
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dot.size = "8.5,11"
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dot.ranksep="equally"
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dot.rank="samerank"
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dot.write("config.dot")
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dot.write_ps("config.ps")
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need_resume = []
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need_startup = True
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def simulate(*args, **kwargs):
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global need_resume, need_startup
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if need_startup:
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internal.core.SimStartup()
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need_startup = False
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for root in need_resume:
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resume(root)
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need_resume = []
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return internal.event.simulate(*args, **kwargs)
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# Export curTick to user script.
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def curTick():
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return internal.core.cvar.curTick
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# Python exit handlers happen in reverse order. We want to dump stats last.
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atexit.register(internal.stats.dump)
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# register our C++ exit callback function with Python
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atexit.register(internal.core.doExitCleanup)
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# This loops until all objects have been fully drained.
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def doDrain(root):
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all_drained = drain(root)
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while (not all_drained):
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all_drained = drain(root)
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# Tries to drain all objects. Draining might not be completed unless
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# all objects return that they are drained on the first call. This is
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# because as objects drain they may cause other objects to no longer
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# be drained.
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def drain(root):
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all_drained = False
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drain_event = internal.event.createCountedDrain()
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unready_objects = root.startDrain(drain_event, True)
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# If we've got some objects that can't drain immediately, then simulate
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if unready_objects > 0:
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drain_event.setCount(unready_objects)
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simulate()
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else:
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all_drained = True
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internal.event.cleanupCountedDrain(drain_event)
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return all_drained
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def resume(root):
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root.resume()
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def checkpoint(root, dir):
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if not isinstance(root, objects.Root):
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raise TypeError, "Checkpoint must be called on a root object."
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doDrain(root)
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print "Writing checkpoint"
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internal.sim_object.serializeAll(dir)
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resume(root)
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def restoreCheckpoint(root, dir):
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print "Restoring from checkpoint"
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internal.sim_object.unserializeAll(dir)
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need_resume.append(root)
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def changeToAtomic(system):
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if not isinstance(system, (objects.Root, objects.System)):
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raise TypeError, "Parameter of type '%s'. Must be type %s or %s." % \
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(type(system), objects.Root, objects.System)
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if system.getMemoryMode() != internal.sim_object.SimObject.Atomic:
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doDrain(system)
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print "Changing memory mode to atomic"
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system.changeTiming(internal.sim_object.SimObject.Atomic)
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def changeToTiming(system):
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if not isinstance(system, (objects.Root, objects.System)):
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raise TypeError, "Parameter of type '%s'. Must be type %s or %s." % \
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(type(system), objects.Root, objects.System)
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if system.getMemoryMode() != internal.sim_object.SimObject.Timing:
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doDrain(system)
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print "Changing memory mode to timing"
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system.changeTiming(internal.sim_object.SimObject.Timing)
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def switchCpus(cpuList):
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print "switching cpus"
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if not isinstance(cpuList, list):
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raise RuntimeError, "Must pass a list to this function"
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for i in cpuList:
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if not isinstance(i, tuple):
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raise RuntimeError, "List must have tuples of (oldCPU,newCPU)"
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[old_cpus, new_cpus] = zip(*cpuList)
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for cpu in old_cpus:
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if not isinstance(cpu, objects.BaseCPU):
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raise TypeError, "%s is not of type BaseCPU" % cpu
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for cpu in new_cpus:
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if not isinstance(cpu, objects.BaseCPU):
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raise TypeError, "%s is not of type BaseCPU" % cpu
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# Drain all of the individual CPUs
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drain_event = internal.event.createCountedDrain()
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unready_cpus = 0
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for old_cpu in old_cpus:
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unready_cpus += old_cpu.startDrain(drain_event, False)
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# If we've got some objects that can't drain immediately, then simulate
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if unready_cpus > 0:
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drain_event.setCount(unready_cpus)
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simulate()
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internal.event.cleanupCountedDrain(drain_event)
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# Now all of the CPUs are ready to be switched out
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for old_cpu in old_cpus:
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old_cpu._ccObject.switchOut()
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index = 0
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for new_cpu in new_cpus:
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new_cpu.takeOverFrom(old_cpus[index])
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new_cpu._ccObject.resume()
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index += 1
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# Since we have so many mutual imports in this package, we should:
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# 1. Put all intra-package imports at the *bottom* of the file, unless
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# they're absolutely needed before that (for top-level statements
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@@ -250,7 +75,24 @@ def switchCpus(cpuList):
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# you can get the wrong result if foo is only partially imported
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# at the point you do that (i.e., because foo is in the middle of
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# importing *you*).
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from main import options
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import objects
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try:
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import internal
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running_m5 = True
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except ImportError:
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running_m5 = False
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if running_m5:
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from event import *
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from simulate import *
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from main import options
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if running_m5:
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import defines
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build_env.update(defines.m5_build_env)
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else:
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import __scons
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build_env.update(__scons.m5_build_env)
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import SimObject
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import params
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from SimObject import resolveSimObject
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import objects
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