1# Copyright (c) 2005 The Regents of The University of Michigan 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer; 8# redistributions in binary form must reproduce the above copyright --- 16 unchanged lines hidden (view full) --- 25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26# 27# Authors: Nathan Binkert 28# Steve Reinhardt 29 30import atexit, os, sys 31 32# import the SWIG-wrapped main C++ functions |
33import internal |
34# import a few SWIG-wrapped items (those that are likely to be used 35# directly by user scripts) completely into this module for 36# convenience |
37from internal.main import simulate, SimLoopExitEvent |
38 39# import the m5 compile options 40import defines 41 42# define a MaxTick parameter 43MaxTick = 2**63 - 1 44 45# define this here so we can use it right away if necessary --- 34 unchanged lines hidden (view full) --- 80def instantiate(root): 81 params.ticks_per_sec = float(root.clock.frequency) 82 root.unproxy_all() 83 # ugly temporary hack to get output to config.ini 84 sys.stdout = file(os.path.join(options.outdir, 'config.ini'), 'w') 85 root.print_ini() 86 sys.stdout.close() # close config.ini 87 sys.stdout = sys.__stdout__ # restore to original |
88 internal.main.loadIniFile(resolveSimObject) # load config.ini into C++ |
89 root.createCCObject() 90 root.connectPorts() |
91 internal.main.finalInit() |
92 noDot = True # temporary until we fix dot 93 if not noDot: 94 dot = pydot.Dot() 95 instance.outputDot(dot) 96 dot.orientation = "portrait" 97 dot.size = "8.5,11" 98 dot.ranksep="equally" 99 dot.rank="samerank" 100 dot.write("config.dot") 101 dot.write_ps("config.ps") 102 103# Export curTick to user script. 104def curTick(): |
105 return internal.main.cvar.curTick |
106 107# register our C++ exit callback function with Python |
108atexit.register(internal.main.doExitCleanup) |
109 110# This loops until all objects have been fully drained. 111def doDrain(root): 112 all_drained = drain(root) 113 while (not all_drained): 114 all_drained = drain(root) 115 116# Tries to drain all objects. Draining might not be completed unless 117# all objects return that they are drained on the first call. This is 118# because as objects drain they may cause other objects to no longer 119# be drained. 120def drain(root): 121 all_drained = False |
122 drain_event = internal.main.createCountedDrain() |
123 unready_objects = root.startDrain(drain_event, True) 124 # If we've got some objects that can't drain immediately, then simulate 125 if unready_objects > 0: 126 drain_event.setCount(unready_objects) 127 simulate() 128 else: 129 all_drained = True |
130 internal.main.cleanupCountedDrain(drain_event) |
131 return all_drained 132 133def resume(root): 134 root.resume() 135 136def checkpoint(root, dir): 137 if not isinstance(root, objects.Root): 138 raise TypeError, "Object is not a root object. Checkpoint must be called on a root object." 139 doDrain(root) 140 print "Writing checkpoint" |
141 internal.main.serializeAll(dir) |
142 resume(root) 143 144def restoreCheckpoint(root, dir): 145 print "Restoring from checkpoint" |
146 internal.main.unserializeAll(dir) |
147 resume(root) 148 149def changeToAtomic(system): 150 if not isinstance(system, objects.Root) and not isinstance(system, objects.System): 151 raise TypeError, "Object is not a root or system object. Checkpoint must be " 152 "called on a root object." 153 doDrain(system) 154 print "Changing memory mode to atomic" |
155 system.changeTiming(internal.main.SimObject.Atomic) |
156 157def changeToTiming(system): 158 if not isinstance(system, objects.Root) and not isinstance(system, objects.System): 159 raise TypeError, "Object is not a root or system object. Checkpoint must be " 160 "called on a root object." 161 doDrain(system) 162 print "Changing memory mode to timing" |
163 system.changeTiming(internal.main.SimObject.Timing) |
164 165def switchCpus(cpuList): 166 print "switching cpus" 167 if not isinstance(cpuList, list): 168 raise RuntimeError, "Must pass a list to this function" 169 for i in cpuList: 170 if not isinstance(i, tuple): 171 raise RuntimeError, "List must have tuples of (oldCPU,newCPU)" 172 173 [old_cpus, new_cpus] = zip(*cpuList) 174 175 for cpu in old_cpus: 176 if not isinstance(cpu, objects.BaseCPU): 177 raise TypeError, "%s is not of type BaseCPU" % cpu 178 for cpu in new_cpus: 179 if not isinstance(cpu, objects.BaseCPU): 180 raise TypeError, "%s is not of type BaseCPU" % cpu 181 182 # Drain all of the individual CPUs |
183 drain_event = internal.main.createCountedDrain() |
184 unready_cpus = 0 185 for old_cpu in old_cpus: 186 unready_cpus += old_cpu.startDrain(drain_event, False) 187 # If we've got some objects that can't drain immediately, then simulate 188 if unready_cpus > 0: 189 drain_event.setCount(unready_cpus) 190 simulate() |
191 internal.main.cleanupCountedDrain(drain_event) |
192 # Now all of the CPUs are ready to be switched out 193 for old_cpu in old_cpus: 194 old_cpu._ccObject.switchOut() 195 index = 0 196 for new_cpu in new_cpus: 197 new_cpu.takeOverFrom(old_cpus[index]) 198 new_cpu._ccObject.resume() 199 index += 1 --- 14 unchanged lines hidden --- |