+# Copyright (c) 2012 ARM Limited
+# All rights reserved
+#
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder. You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
# Copyright (c) 2006-2008 The Regents of The University of Michigan
# Copyright (c) 2010 Advanced Micro Devices, Inc.
# All rights reserved.
#
# Authors: Lisa Hsu
+import sys
from os import getcwd
from os.path import join as joinpath
+import CpuConfig
+
import m5
from m5.defines import buildEnv
from m5.objects import *
addToPath('../common')
+def getCPUClass(cpu_type):
+ """Returns the required cpu class and the mode of operation."""
+ cls = CpuConfig.get(cpu_type)
+ return cls, cls.memory_mode()
+
def setCPUClass(options):
+ """Returns two cpu classes and the initial mode of operation.
- atomic = False
- if options.cpu_type == "timing":
- class TmpClass(TimingSimpleCPU): pass
- elif options.cpu_type == "detailed":
- if not options.caches:
- print "O3 CPU must be used with caches"
- sys.exit(1)
- class TmpClass(DerivO3CPU): pass
- elif options.cpu_type == "inorder":
- if not options.caches:
- print "InOrder CPU must be used with caches"
- sys.exit(1)
- class TmpClass(InOrderCPU): pass
- else:
- class TmpClass(AtomicSimpleCPU): pass
- atomic = True
+ Restoring from a checkpoint or fast forwarding through a benchmark
+ can be done using one type of cpu, and then the actual
+ simulation can be carried out using another type. This function
+ returns these two types of cpus and the initial mode of operation
+ depending on the options provided.
+ """
+ TmpClass, test_mem_mode = getCPUClass(options.cpu_type)
CPUClass = None
- test_mem_mode = 'atomic'
+ if TmpClass.require_caches() and \
+ not options.caches and not options.ruby:
+ fatal("%s must be used with caches" % options.cpu_type)
+
+ if options.checkpoint_restore != None:
+ if options.restore_with_cpu != options.cpu_type:
+ CPUClass = TmpClass
+ TmpClass, test_mem_mode = getCPUClass(options.restore_with_cpu)
+ elif options.fast_forward:
+ CPUClass = TmpClass
+ TmpClass = AtomicSimpleCPU
+ test_mem_mode = 'atomic'
+
+ return (TmpClass, test_mem_mode, CPUClass)
+
+def setWorkCountOptions(system, options):
+ if options.work_item_id != None:
+ system.work_item_id = options.work_item_id
+ if options.work_begin_cpu_id_exit != None:
+ system.work_begin_cpu_id_exit = options.work_begin_cpu_id_exit
+ if options.work_end_exit_count != None:
+ system.work_end_exit_count = options.work_end_exit_count
+ if options.work_end_checkpoint_count != None:
+ system.work_end_ckpt_count = options.work_end_checkpoint_count
+ if options.work_begin_exit_count != None:
+ system.work_begin_exit_count = options.work_begin_exit_count
+ if options.work_begin_checkpoint_count != None:
+ system.work_begin_ckpt_count = options.work_begin_checkpoint_count
+ if options.work_cpus_checkpoint_count != None:
+ system.work_cpus_ckpt_count = options.work_cpus_checkpoint_count
+
+def findCptDir(options, maxtick, cptdir, testsys):
+ """Figures out the directory from which the checkpointed state is read.
+
+ There are two different ways in which the directories holding checkpoints
+ can be named --
+ 1. cpt.<benchmark name>.<instruction count when the checkpoint was taken>
+ 2. cpt.<some number, usually the tick value when the checkpoint was taken>
+
+ This function parses through the options to figure out which one of the
+ above should be used for selecting the checkpoint, and then figures out
+ the appropriate directory.
+
+ It also sets the value of the maximum tick value till which the simulation
+ will run.
+ """
+
+ from os.path import isdir, exists
+ from os import listdir
+ import re
+
+ if not isdir(cptdir):
+ fatal("checkpoint dir %s does not exist!", cptdir)
+
+ if options.at_instruction or options.simpoint:
+ inst = options.checkpoint_restore
+ if options.simpoint:
+ # assume workload 0 has the simpoint
+ if testsys.cpu[0].workload[0].simpoint == 0:
+ fatal('Unable to find simpoint')
+ inst += int(testsys.cpu[0].workload[0].simpoint)
+
+ checkpoint_dir = joinpath(cptdir, "cpt.%s.%s" % (options.bench, inst))
+ if not exists(checkpoint_dir):
+ fatal("Unable to find checkpoint directory %s", checkpoint_dir)
+ else:
+ dirs = listdir(cptdir)
+ expr = re.compile('cpt\.([0-9]*)')
+ cpts = []
+ for dir in dirs:
+ match = expr.match(dir)
+ if match:
+ cpts.append(match.group(1))
+
+ cpts.sort(lambda a,b: cmp(long(a), long(b)))
+
+ cpt_num = options.checkpoint_restore
+ if cpt_num > len(cpts):
+ fatal('Checkpoint %d not found', cpt_num)
+
+ maxtick = maxtick - int(cpts[cpt_num - 1])
+ checkpoint_dir = joinpath(cptdir, "cpt.%s" % cpts[cpt_num - 1])
- if not atomic:
+ return maxtick, checkpoint_dir
+
+def scriptCheckpoints(options, maxtick, cptdir):
+ if options.at_instruction or options.simpoint:
+ checkpoint_inst = int(options.take_checkpoints)
+
+ # maintain correct offset if we restored from some instruction
if options.checkpoint_restore != None:
- if options.restore_with_cpu != options.cpu_type:
- CPUClass = TmpClass
- class TmpClass(AtomicSimpleCPU): pass
+ checkpoint_inst += options.checkpoint_restore
+
+ print "Creating checkpoint at inst:%d" % (checkpoint_inst)
+ exit_event = m5.simulate()
+ exit_cause = exit_event.getCause()
+ print "exit cause = %s" % exit_cause
+
+ # skip checkpoint instructions should they exist
+ while exit_cause == "checkpoint":
+ exit_event = m5.simulate()
+ exit_cause = exit_event.getCause()
+
+ if exit_cause == "a thread reached the max instruction count":
+ m5.checkpoint(joinpath(cptdir, "cpt.%s.%d" % \
+ (options.bench, checkpoint_inst)))
+ print "Checkpoint written."
+
+ else:
+ when, period = options.take_checkpoints.split(",", 1)
+ when = int(when)
+ period = int(period)
+ num_checkpoints = 0
+
+ exit_event = m5.simulate(when - m5.curTick())
+ exit_cause = exit_event.getCause()
+ while exit_cause == "checkpoint":
+ exit_event = m5.simulate(when - m5.curTick())
+ exit_cause = exit_event.getCause()
+
+ if exit_cause == "simulate() limit reached":
+ m5.checkpoint(joinpath(cptdir, "cpt.%d"))
+ num_checkpoints += 1
+
+ sim_ticks = when
+ max_checkpoints = options.max_checkpoints
+
+ while num_checkpoints < max_checkpoints and \
+ exit_cause == "simulate() limit reached":
+ if (sim_ticks + period) > maxtick:
+ exit_event = m5.simulate(maxtick - sim_ticks)
+ exit_cause = exit_event.getCause()
+ break
else:
- if options.restore_with_cpu != "atomic":
- test_mem_mode = 'timing'
+ exit_event = m5.simulate(period)
+ exit_cause = exit_event.getCause()
+ sim_ticks += period
+ while exit_event.getCause() == "checkpoint":
+ exit_event = m5.simulate(sim_ticks - m5.curTick())
+ if exit_event.getCause() == "simulate() limit reached":
+ m5.checkpoint(joinpath(cptdir, "cpt.%d"))
+ num_checkpoints += 1
- elif options.fast_forward:
- CPUClass = TmpClass
- class TmpClass(AtomicSimpleCPU): pass
- else:
- test_mem_mode = 'timing'
+ return exit_event
- return (TmpClass, test_mem_mode, CPUClass)
+def benchCheckpoints(options, maxtick, cptdir):
+ exit_event = m5.simulate(maxtick - m5.curTick())
+ exit_cause = exit_event.getCause()
+
+ num_checkpoints = 0
+ max_checkpoints = options.max_checkpoints
+
+ while exit_cause == "checkpoint":
+ m5.checkpoint(joinpath(cptdir, "cpt.%d"))
+ num_checkpoints += 1
+ if num_checkpoints == max_checkpoints:
+ exit_cause = "maximum %d checkpoints dropped" % max_checkpoints
+ break
+
+ exit_event = m5.simulate(maxtick - m5.curTick())
+ exit_cause = exit_event.getCause()
+
+ return exit_event
+
+def repeatSwitch(testsys, repeat_switch_cpu_list, maxtick, switch_freq):
+ print "starting switch loop"
+ while True:
+ exit_event = m5.simulate(switch_freq)
+ exit_cause = exit_event.getCause()
+
+ if exit_cause != "simulate() limit reached":
+ return exit_event
+ m5.switchCpus(testsys, repeat_switch_cpu_list)
+
+ tmp_cpu_list = []
+ for old_cpu, new_cpu in repeat_switch_cpu_list:
+ tmp_cpu_list.append((new_cpu, old_cpu))
+ repeat_switch_cpu_list = tmp_cpu_list
+
+ if (maxtick - m5.curTick()) <= switch_freq:
+ exit_event = m5.simulate(maxtick - m5.curTick())
+ return exit_event
def run(options, root, testsys, cpu_class):
if options.maxtick:
if options.standard_switch and not options.caches:
fatal("Must specify --caches when using --standard-switch")
+ if options.standard_switch and options.repeat_switch:
+ fatal("Can't specify both --standard-switch and --repeat-switch")
+
+ if options.repeat_switch and options.take_checkpoints:
+ fatal("Can't specify both --repeat-switch and --take-checkpoints")
+
np = options.num_cpus
- max_checkpoints = options.max_checkpoints
switch_cpus = None
if options.prog_interval:
testsys.cpu[i].max_insts_any_thread = options.maxinsts
if cpu_class:
- switch_cpus = [cpu_class(defer_registration=True, cpu_id=(np+i))
+ switch_cpus = [cpu_class(switched_out=True, cpu_id=(i))
for i in xrange(np)]
for i in xrange(np):
if options.fast_forward:
testsys.cpu[i].max_insts_any_thread = int(options.fast_forward)
switch_cpus[i].system = testsys
- if not buildEnv['FULL_SYSTEM']:
- switch_cpus[i].workload = testsys.cpu[i].workload
- switch_cpus[i].clock = testsys.cpu[0].clock
+ switch_cpus[i].workload = testsys.cpu[i].workload
+ switch_cpus[i].clock = testsys.cpu[i].clock
# simulation period
if options.maxinsts:
switch_cpus[i].max_insts_any_thread = options.maxinsts
+ # Add checker cpu if selected
+ if options.checker:
+ switch_cpus[i].addCheckerCpu()
testsys.switch_cpus = switch_cpus
switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
- if options.standard_switch:
- if not options.caches:
- # O3 CPU must have a cache to work.
- print "O3 CPU must be used with caches"
+ if options.repeat_switch:
+ switch_class = getCPUClass(options.cpu_type)[0]
+ if switch_class.require_caches() and \
+ not options.caches:
+ print "%s: Must be used with caches" % str(switch_class)
sys.exit(1)
+ if not switch_class.support_take_over():
+ print "%s: CPU switching not supported" % str(switch_class)
+ sys.exit(1)
+
+ repeat_switch_cpus = [switch_class(switched_out=True, \
+ cpu_id=(i)) for i in xrange(np)]
+
+ for i in xrange(np):
+ repeat_switch_cpus[i].system = testsys
+ repeat_switch_cpus[i].workload = testsys.cpu[i].workload
+ repeat_switch_cpus[i].clock = testsys.cpu[i].clock
+
+ if options.maxinsts:
+ repeat_switch_cpus[i].max_insts_any_thread = options.maxinsts
- switch_cpus = [TimingSimpleCPU(defer_registration=True, cpu_id=(np+i))
+ if options.checker:
+ repeat_switch_cpus[i].addCheckerCpu()
+
+ testsys.repeat_switch_cpus = repeat_switch_cpus
+
+ if cpu_class:
+ repeat_switch_cpu_list = [(switch_cpus[i], repeat_switch_cpus[i])
+ for i in xrange(np)]
+ else:
+ repeat_switch_cpu_list = [(testsys.cpu[i], repeat_switch_cpus[i])
+ for i in xrange(np)]
+
+ if options.standard_switch:
+ switch_cpus = [TimingSimpleCPU(switched_out=True, cpu_id=(i))
for i in xrange(np)]
- switch_cpus_1 = [DerivO3CPU(defer_registration=True, cpu_id=(2*np+i))
+ switch_cpus_1 = [DerivO3CPU(switched_out=True, cpu_id=(i))
for i in xrange(np)]
for i in xrange(np):
switch_cpus[i].system = testsys
switch_cpus_1[i].system = testsys
- if not buildEnv['FULL_SYSTEM']:
- switch_cpus[i].workload = testsys.cpu[i].workload
- switch_cpus_1[i].workload = testsys.cpu[i].workload
- switch_cpus[i].clock = testsys.cpu[0].clock
- switch_cpus_1[i].clock = testsys.cpu[0].clock
+ switch_cpus[i].workload = testsys.cpu[i].workload
+ switch_cpus_1[i].workload = testsys.cpu[i].workload
+ switch_cpus[i].clock = testsys.cpu[i].clock
+ switch_cpus_1[i].clock = testsys.cpu[i].clock
# if restoring, make atomic cpu simulate only a few instructions
if options.checkpoint_restore != None:
if options.maxinsts:
switch_cpus_1[i].max_insts_any_thread = options.maxinsts
+ # attach the checker cpu if selected
+ if options.checker:
+ switch_cpus[i].addCheckerCpu()
+ switch_cpus_1[i].addCheckerCpu()
+
testsys.switch_cpus = switch_cpus
testsys.switch_cpus_1 = switch_cpus_1
switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)]
checkpoint_dir = None
if options.checkpoint_restore != None:
- from os.path import isdir, exists
- from os import listdir
- import re
-
- if not isdir(cptdir):
- fatal("checkpoint dir %s does not exist!", cptdir)
-
- if options.at_instruction or options.simpoint:
- inst = options.checkpoint_restore
- if options.simpoint:
- # assume workload 0 has the simpoint
- if testsys.cpu[0].workload[0].simpoint == 0:
- fatal('Unable to find simpoint')
- inst += int(testsys.cpu[0].workload[0].simpoint)
-
- checkpoint_dir = joinpath(cptdir,
- "cpt.%s.%s" % (options.bench, inst))
- if not exists(checkpoint_dir):
- fatal("Unable to find checkpoint directory %s", checkpoint_dir)
- else:
- dirs = listdir(cptdir)
- expr = re.compile('cpt\.([0-9]*)')
- cpts = []
- for dir in dirs:
- match = expr.match(dir)
- if match:
- cpts.append(match.group(1))
-
- cpts.sort(lambda a,b: cmp(long(a), long(b)))
-
- cpt_num = options.checkpoint_restore
-
- if cpt_num > len(cpts):
- fatal('Checkpoint %d not found', cpt_num)
-
- ## Adjust max tick based on our starting tick
- maxtick = maxtick - int(cpts[cpt_num - 1])
- checkpoint_dir = joinpath(cptdir, "cpt.%s" % cpts[cpt_num - 1])
-
+ maxtick, checkpoint_dir = findCptDir(options, maxtick, cptdir, testsys)
m5.instantiate(checkpoint_dir)
if options.standard_switch or cpu_class:
exit_event = m5.simulate(10000)
print "Switched CPUS @ tick %s" % (m5.curTick())
- # when you change to Timing (or Atomic), you halt the system
- # given as argument. When you are finished with the system
- # changes (including switchCpus), you must resume the system
- # manually. You DON'T need to resume after just switching
- # CPUs if you haven't changed anything on the system level.
-
- m5.changeToTiming(testsys)
- m5.switchCpus(switch_cpu_list)
- m5.resume(testsys)
+ m5.switchCpus(testsys, switch_cpu_list)
if options.standard_switch:
print "Switch at instruction count:%d" % \
if options.warmup_insts:
exit_event = m5.simulate()
else:
- exit_event = m5.simulate(options.warmup)
+ 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.drain(testsys)
- m5.switchCpus(switch_cpu_list1)
- m5.resume(testsys)
-
- num_checkpoints = 0
- exit_cause = ''
+ m5.switchCpus(testsys, switch_cpu_list1)
# If we're taking and restoring checkpoints, use checkpoint_dir
# option only for finding the checkpoints to restore from. This
else:
cptdir = getcwd()
- # 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.
if options.take_checkpoints != None :
- if options.at_instruction or options.simpoint:
- checkpoint_inst = int(options.take_checkpoints)
-
- # maintain correct offset if we restored from some instruction
- if options.checkpoint_restore != None:
- checkpoint_inst += options.checkpoint_restore
-
- print "Creating checkpoint at inst:%d" % (checkpoint_inst)
- exit_event = m5.simulate()
- print "exit cause = %s" % (exit_event.getCause())
-
- # skip checkpoint instructions should they exist
- while exit_event.getCause() == "checkpoint":
- exit_event = m5.simulate()
-
- if exit_event.getCause() == \
- "a thread reached the max instruction count":
- m5.checkpoint(joinpath(cptdir, "cpt.%s.%d" % \
- (options.bench, checkpoint_inst)))
- print "Checkpoint written."
- num_checkpoints += 1
-
- if exit_event.getCause() == "user interrupt received":
- exit_cause = exit_event.getCause();
- else:
- when, period = options.take_checkpoints.split(",", 1)
- when = int(when)
- period = int(period)
-
- exit_event = m5.simulate(when)
- while exit_event.getCause() == "checkpoint":
- exit_event = m5.simulate(when - m5.curTick())
-
- if exit_event.getCause() == "simulate() limit reached":
- m5.checkpoint(joinpath(cptdir, "cpt.%d"))
- num_checkpoints += 1
-
- sim_ticks = when
- exit_cause = "maximum %d checkpoints dropped" % max_checkpoints
- while num_checkpoints < max_checkpoints and \
- exit_event.getCause() == "simulate() limit reached":
- if (sim_ticks + period) > maxtick:
- exit_event = m5.simulate(maxtick - sim_ticks)
- exit_cause = exit_event.getCause()
- break
- else:
- exit_event = m5.simulate(period)
- sim_ticks += period
- while exit_event.getCause() == "checkpoint":
- exit_event = m5.simulate(sim_ticks - m5.curTick())
- if exit_event.getCause() == "simulate() limit reached":
- m5.checkpoint(joinpath(cptdir, "cpt.%d"))
- num_checkpoints += 1
-
- if exit_event.getCause() != "simulate() limit reached":
- exit_cause = exit_event.getCause();
-
- else: # no checkpoints being taken via this script
+ # 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_event = scriptCheckpoints(options, maxtick, cptdir)
+ else:
if options.fast_forward:
m5.stats.reset()
print "**** REAL SIMULATION ****"
- exit_event = m5.simulate(maxtick)
-
- while exit_event.getCause() == "checkpoint":
- m5.checkpoint(joinpath(cptdir, "cpt.%d"))
- num_checkpoints += 1
- if num_checkpoints == max_checkpoints:
- exit_cause = "maximum %d checkpoints dropped" % max_checkpoints
- break
-
- exit_event = m5.simulate(maxtick - m5.curTick())
- exit_cause = exit_event.getCause()
- if exit_cause == '':
- exit_cause = exit_event.getCause()
- print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_cause)
+ # 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_event = repeatSwitch(testsys, repeat_switch_cpu_list,
+ maxtick, options.repeat_switch)
+ else:
+ exit_event = benchCheckpoints(options, maxtick, cptdir)
+ print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause())
if options.checkpoint_at_end:
m5.checkpoint(joinpath(cptdir, "cpt.%d"))
+ if not m5.options.interactive:
+ sys.exit(exit_event.getCode())
projects / gem5.git / blobdiff