234fa4cf7e
When switching from an atomic CPU to any of the timing CPUs, a drain is unnecessary since no events are scheduled in atomic mode. However, when trying to switch CPUs starting with a timing CPU, there may be events scheduled. This change ensures that all events are drained from the system by calling m5.drain before switching CPUs.
508 lines
20 KiB
Python
508 lines
20 KiB
Python
# Copyright (c) 2006-2008 The Regents of The University of Michigan
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# Copyright (c) 2010 Advanced Micro Devices, Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Lisa Hsu
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from os import getcwd
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from os.path import join as joinpath
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import m5
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from m5.defines import buildEnv
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from m5.objects import *
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from m5.util import *
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from O3_ARM_v7a import *
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addToPath('../common')
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def getCPUClass(cpu_type):
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"""Returns the required cpu class and the mode of operation.
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"""
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if cpu_type == "timing":
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return TimingSimpleCPU, 'timing'
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elif cpu_type == "detailed":
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return DerivO3CPU, 'timing'
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elif cpu_type == "arm_detailed":
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return O3_ARM_v7a_3, 'timing'
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elif cpu_type == "inorder":
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return InOrderCPU, 'timing'
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else:
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return AtomicSimpleCPU, 'atomic'
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def setCPUClass(options):
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"""Returns two cpu classes and the initial mode of operation.
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Restoring from a checkpoint or fast forwarding through a benchmark
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can be done using one type of cpu, and then the actual
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simulation can be carried out using another type. This function
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returns these two types of cpus and the initial mode of operation
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depending on the options provided.
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"""
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if options.cpu_type == "detailed" or \
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options.cpu_type == "arm_detailed" or \
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options.cpu_type == "inorder" :
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if not options.caches and not options.ruby:
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fatal("O3/Inorder CPU must be used with caches")
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TmpClass, test_mem_mode = getCPUClass(options.cpu_type)
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CPUClass = None
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if options.checkpoint_restore != None:
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if options.restore_with_cpu != options.cpu_type:
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CPUClass = TmpClass
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TmpClass, test_mem_mode = getCPUClass(options.restore_with_cpu)
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elif options.fast_forward:
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CPUClass = TmpClass
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TmpClass = AtomicSimpleCPU
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test_mem_mode = 'atomic'
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return (TmpClass, test_mem_mode, CPUClass)
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def setWorkCountOptions(system, options):
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if options.work_item_id != None:
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system.work_item_id = options.work_item_id
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if options.work_begin_cpu_id_exit != None:
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system.work_begin_cpu_id_exit = options.work_begin_cpu_id_exit
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if options.work_end_exit_count != None:
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system.work_end_exit_count = options.work_end_exit_count
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if options.work_end_checkpoint_count != None:
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system.work_end_ckpt_count = options.work_end_checkpoint_count
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if options.work_begin_exit_count != None:
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system.work_begin_exit_count = options.work_begin_exit_count
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if options.work_begin_checkpoint_count != None:
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system.work_begin_ckpt_count = options.work_begin_checkpoint_count
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if options.work_cpus_checkpoint_count != None:
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system.work_cpus_ckpt_count = options.work_cpus_checkpoint_count
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def findCptDir(options, maxtick, cptdir, testsys):
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"""Figures out the directory from which the checkpointed state is read.
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There are two different ways in which the directories holding checkpoints
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can be named --
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1. cpt.<benchmark name>.<instruction count when the checkpoint was taken>
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2. cpt.<some number, usually the tick value when the checkpoint was taken>
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This function parses through the options to figure out which one of the
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above should be used for selecting the checkpoint, and then figures out
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the appropriate directory.
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It also sets the value of the maximum tick value till which the simulation
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will run.
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"""
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from os.path import isdir, exists
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from os import listdir
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import re
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if not isdir(cptdir):
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fatal("checkpoint dir %s does not exist!", cptdir)
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if options.at_instruction or options.simpoint:
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inst = options.checkpoint_restore
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if options.simpoint:
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# assume workload 0 has the simpoint
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if testsys.cpu[0].workload[0].simpoint == 0:
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fatal('Unable to find simpoint')
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inst += int(testsys.cpu[0].workload[0].simpoint)
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checkpoint_dir = joinpath(cptdir, "cpt.%s.%s" % (options.bench, inst))
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if not exists(checkpoint_dir):
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fatal("Unable to find checkpoint directory %s", checkpoint_dir)
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else:
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dirs = listdir(cptdir)
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expr = re.compile('cpt\.([0-9]*)')
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cpts = []
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for dir in dirs:
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match = expr.match(dir)
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if match:
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cpts.append(match.group(1))
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cpts.sort(lambda a,b: cmp(long(a), long(b)))
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cpt_num = options.checkpoint_restore
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if cpt_num > len(cpts):
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fatal('Checkpoint %d not found', cpt_num)
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maxtick = maxtick - int(cpts[cpt_num - 1])
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checkpoint_dir = joinpath(cptdir, "cpt.%s" % cpts[cpt_num - 1])
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return maxtick, checkpoint_dir
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def scriptCheckpoints(options, maxtick, cptdir):
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if options.at_instruction or options.simpoint:
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checkpoint_inst = int(options.take_checkpoints)
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# maintain correct offset if we restored from some instruction
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if options.checkpoint_restore != None:
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checkpoint_inst += options.checkpoint_restore
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print "Creating checkpoint at inst:%d" % (checkpoint_inst)
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exit_event = m5.simulate()
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exit_cause = exit_event.getCause()
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print "exit cause = %s" % exit_cause
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# skip checkpoint instructions should they exist
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while exit_cause == "checkpoint":
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exit_event = m5.simulate()
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exit_cause = exit_event.getCause()
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if exit_cause == "a thread reached the max instruction count":
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m5.checkpoint(joinpath(cptdir, "cpt.%s.%d" % \
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(options.bench, checkpoint_inst)))
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print "Checkpoint written."
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else:
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when, period = options.take_checkpoints.split(",", 1)
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when = int(when)
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period = int(period)
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num_checkpoints = 0
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exit_event = m5.simulate(when)
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exit_cause = exit_event.getCause()
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while exit_cause == "checkpoint":
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exit_event = m5.simulate(when - m5.curTick())
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exit_cause = exit_event.getCause()
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if exit_cause == "simulate() limit reached":
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m5.checkpoint(joinpath(cptdir, "cpt.%d"))
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num_checkpoints += 1
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sim_ticks = when
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max_checkpoints = options.max_checkpoints
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while num_checkpoints < max_checkpoints and \
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exit_cause == "simulate() limit reached":
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if (sim_ticks + period) > maxtick:
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exit_event = m5.simulate(maxtick - sim_ticks)
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exit_cause = exit_event.getCause()
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break
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else:
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exit_event = m5.simulate(period)
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exit_cause = exit_event.getCause()
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sim_ticks += period
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while exit_event.getCause() == "checkpoint":
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exit_event = m5.simulate(sim_ticks - m5.curTick())
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if exit_event.getCause() == "simulate() limit reached":
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m5.checkpoint(joinpath(cptdir, "cpt.%d"))
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num_checkpoints += 1
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return exit_cause
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def benchCheckpoints(options, maxtick, cptdir):
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exit_event = m5.simulate(maxtick)
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exit_cause = exit_event.getCause()
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num_checkpoints = 0
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max_checkpoints = options.max_checkpoints
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while exit_cause == "checkpoint":
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m5.checkpoint(joinpath(cptdir, "cpt.%d"))
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num_checkpoints += 1
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if num_checkpoints == max_checkpoints:
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exit_cause = "maximum %d checkpoints dropped" % max_checkpoints
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break
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exit_event = m5.simulate(maxtick - m5.curTick())
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exit_cause = exit_event.getCause()
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return exit_cause
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def repeatSwitch(testsys, repeat_switch_cpu_list, maxtick, switch_freq):
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print "starting switch loop"
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while True:
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exit_event = m5.simulate(switch_freq)
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exit_cause = exit_event.getCause()
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if exit_cause != "simulate() limit reached":
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return exit_cause
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print "draining the system"
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m5.doDrain(testsys)
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m5.switchCpus(repeat_switch_cpu_list)
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m5.resume(testsys)
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tmp_cpu_list = []
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for old_cpu, new_cpu in repeat_switch_cpu_list:
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tmp_cpu_list.append((new_cpu, old_cpu))
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repeat_switch_cpu_list = tmp_cpu_list
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if (maxtick - m5.curTick()) <= switch_freq:
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exit_event = m5.simulate(maxtick - m5.curTick())
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return exit_event.getCause()
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def run(options, root, testsys, cpu_class):
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if options.maxtick:
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maxtick = options.maxtick
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elif options.maxtime:
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simtime = m5.ticks.seconds(simtime)
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print "simulating for: ", simtime
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maxtick = simtime
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else:
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maxtick = m5.MaxTick
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if options.checkpoint_dir:
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cptdir = options.checkpoint_dir
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elif m5.options.outdir:
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cptdir = m5.options.outdir
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else:
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cptdir = getcwd()
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if options.fast_forward and options.checkpoint_restore != None:
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fatal("Can't specify both --fast-forward and --checkpoint-restore")
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if options.standard_switch and not options.caches:
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fatal("Must specify --caches when using --standard-switch")
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if options.standard_switch and options.repeat_switch:
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fatal("Can't specify both --standard-switch and --repeat-switch")
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if options.repeat_switch and options.take_checkpoints:
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fatal("Can't specify both --repeat-switch and --take-checkpoints")
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np = options.num_cpus
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switch_cpus = None
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if options.prog_interval:
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for i in xrange(np):
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testsys.cpu[i].progress_interval = options.prog_interval
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if options.maxinsts:
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for i in xrange(np):
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testsys.cpu[i].max_insts_any_thread = options.maxinsts
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if cpu_class:
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switch_cpus = [cpu_class(defer_registration=True, cpu_id=(i))
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for i in xrange(np)]
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for i in xrange(np):
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if options.fast_forward:
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testsys.cpu[i].max_insts_any_thread = int(options.fast_forward)
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switch_cpus[i].system = testsys
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switch_cpus[i].workload = testsys.cpu[i].workload
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switch_cpus[i].clock = testsys.cpu[i].clock
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# simulation period
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if options.maxinsts:
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switch_cpus[i].max_insts_any_thread = options.maxinsts
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# Add checker cpu if selected
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if options.checker:
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switch_cpus[i].addCheckerCpu()
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testsys.switch_cpus = switch_cpus
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switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
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if options.repeat_switch:
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if options.cpu_type == "arm_detailed":
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if not options.caches:
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print "O3 CPU must be used with caches"
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sys.exit(1)
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repeat_switch_cpus = [O3_ARM_v7a_3(defer_registration=True, \
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cpu_id=(i)) for i in xrange(np)]
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elif options.cpu_type == "detailed":
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if not options.caches:
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print "O3 CPU must be used with caches"
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sys.exit(1)
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repeat_switch_cpus = [DerivO3CPU(defer_registration=True, \
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cpu_id=(i)) for i in xrange(np)]
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elif options.cpu_type == "inorder":
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print "inorder CPU switching not supported"
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sys.exit(1)
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elif options.cpu_type == "timing":
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repeat_switch_cpus = [TimingSimpleCPU(defer_registration=True, \
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cpu_id=(i)) for i in xrange(np)]
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else:
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repeat_switch_cpus = [AtomicSimpleCPU(defer_registration=True, \
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cpu_id=(i)) for i in xrange(np)]
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for i in xrange(np):
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repeat_switch_cpus[i].system = testsys
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repeat_switch_cpus[i].workload = testsys.cpu[i].workload
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repeat_switch_cpus[i].clock = testsys.cpu[i].clock
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if options.maxinsts:
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repeat_switch_cpus[i].max_insts_any_thread = options.maxinsts
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if options.checker:
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repeat_switch_cpus[i].addCheckerCpu()
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testsys.repeat_switch_cpus = repeat_switch_cpus
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if cpu_class:
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repeat_switch_cpu_list = [(switch_cpus[i], repeat_switch_cpus[i])
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for i in xrange(np)]
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else:
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repeat_switch_cpu_list = [(testsys.cpu[i], repeat_switch_cpus[i])
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for i in xrange(np)]
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if options.standard_switch:
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switch_cpus = [TimingSimpleCPU(defer_registration=True, cpu_id=(i))
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for i in xrange(np)]
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switch_cpus_1 = [DerivO3CPU(defer_registration=True, cpu_id=(i))
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for i in xrange(np)]
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for i in xrange(np):
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switch_cpus[i].system = testsys
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switch_cpus_1[i].system = testsys
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switch_cpus[i].workload = testsys.cpu[i].workload
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switch_cpus_1[i].workload = testsys.cpu[i].workload
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switch_cpus[i].clock = testsys.cpu[i].clock
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switch_cpus_1[i].clock = testsys.cpu[i].clock
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# if restoring, make atomic cpu simulate only a few instructions
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if options.checkpoint_restore != None:
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testsys.cpu[i].max_insts_any_thread = 1
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# Fast forward to specified location if we are not restoring
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elif options.fast_forward:
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testsys.cpu[i].max_insts_any_thread = int(options.fast_forward)
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# Fast forward to a simpoint (warning: time consuming)
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elif options.simpoint:
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if testsys.cpu[i].workload[0].simpoint == 0:
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fatal('simpoint not found')
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testsys.cpu[i].max_insts_any_thread = \
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testsys.cpu[i].workload[0].simpoint
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# No distance specified, just switch
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else:
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testsys.cpu[i].max_insts_any_thread = 1
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# warmup period
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if options.warmup_insts:
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switch_cpus[i].max_insts_any_thread = options.warmup_insts
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# simulation period
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if options.maxinsts:
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switch_cpus_1[i].max_insts_any_thread = options.maxinsts
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# attach the checker cpu if selected
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if options.checker:
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switch_cpus[i].addCheckerCpu()
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switch_cpus_1[i].addCheckerCpu()
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testsys.switch_cpus = switch_cpus
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testsys.switch_cpus_1 = switch_cpus_1
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switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
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switch_cpu_list1 = [(switch_cpus[i], switch_cpus_1[i]) for i in xrange(np)]
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# set the checkpoint in the cpu before m5.instantiate is called
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if options.take_checkpoints != None and \
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(options.simpoint or options.at_instruction):
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offset = int(options.take_checkpoints)
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# Set an instruction break point
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if options.simpoint:
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for i in xrange(np):
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if testsys.cpu[i].workload[0].simpoint == 0:
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fatal('no simpoint for testsys.cpu[%d].workload[0]', i)
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checkpoint_inst = int(testsys.cpu[i].workload[0].simpoint) + offset
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testsys.cpu[i].max_insts_any_thread = checkpoint_inst
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# used for output below
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options.take_checkpoints = checkpoint_inst
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else:
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options.take_checkpoints = offset
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# Set all test cpus with the right number of instructions
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# for the upcoming simulation
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for i in xrange(np):
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testsys.cpu[i].max_insts_any_thread = offset
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checkpoint_dir = None
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if options.checkpoint_restore != None:
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maxtick, checkpoint_dir = findCptDir(options, maxtick, cptdir, testsys)
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m5.instantiate(checkpoint_dir)
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if options.standard_switch or cpu_class:
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if options.standard_switch:
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print "Switch at instruction count:%s" % \
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str(testsys.cpu[0].max_insts_any_thread)
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exit_event = m5.simulate()
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elif cpu_class and options.fast_forward:
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print "Switch at instruction count:%s" % \
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str(testsys.cpu[0].max_insts_any_thread)
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exit_event = m5.simulate()
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else:
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print "Switch at curTick count:%s" % str(10000)
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exit_event = m5.simulate(10000)
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print "Switched CPUS @ tick %s" % (m5.curTick())
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# when you change to Timing (or Atomic), you halt the system
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# given as argument. When you are finished with the system
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# changes (including switchCpus), you must resume the system
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# manually. You DON'T need to resume after just switching
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# CPUs if you haven't changed anything on the system level.
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m5.doDrain(testsys)
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m5.changeToTiming(testsys)
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m5.switchCpus(switch_cpu_list)
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m5.resume(testsys)
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if options.standard_switch:
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print "Switch at instruction count:%d" % \
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(testsys.switch_cpus[0].max_insts_any_thread)
|
|
|
|
#warmup instruction count may have already been set
|
|
if options.warmup_insts:
|
|
exit_event = m5.simulate()
|
|
else:
|
|
exit_event = m5.simulate(options.standard_switch)
|
|
print "Switching CPUS @ tick %s" % (m5.curTick())
|
|
print "Simulation ends instruction count:%d" % \
|
|
(testsys.switch_cpus_1[0].max_insts_any_thread)
|
|
m5.doDrain(testsys)
|
|
m5.switchCpus(switch_cpu_list1)
|
|
m5.resume(testsys)
|
|
|
|
# If we're taking and restoring checkpoints, use checkpoint_dir
|
|
# option only for finding the checkpoints to restore from. This
|
|
# lets us test checkpointing by restoring from one set of
|
|
# checkpoints, generating a second set, and then comparing them.
|
|
if options.take_checkpoints and options.checkpoint_restore:
|
|
if m5.options.outdir:
|
|
cptdir = m5.options.outdir
|
|
else:
|
|
cptdir = getcwd()
|
|
|
|
if options.take_checkpoints != None :
|
|
# Checkpoints being taken via the command line at <when> and at
|
|
# subsequent periods of <period>. Checkpoint instructions
|
|
# received from the benchmark running are ignored and skipped in
|
|
# favor of command line checkpoint instructions.
|
|
exit_cause = scriptCheckpoints(options, maxtick, cptdir)
|
|
else:
|
|
if options.fast_forward:
|
|
m5.stats.reset()
|
|
print "**** REAL SIMULATION ****"
|
|
|
|
# If checkpoints are being taken, then the checkpoint instruction
|
|
# will occur in the benchmark code it self.
|
|
if options.repeat_switch and maxtick > options.repeat_switch:
|
|
exit_cause = repeatSwitch(testsys, repeat_switch_cpu_list,
|
|
maxtick, options.repeat_switch)
|
|
else:
|
|
exit_cause = benchCheckpoints(options, maxtick, cptdir)
|
|
|
|
print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_cause)
|
|
if options.checkpoint_at_end:
|
|
m5.checkpoint(joinpath(cptdir, "cpt.%d"))
|