Simulation.py revision 9521:1cd02decbfd3
1# Copyright (c) 2012 ARM Limited 2# All rights reserved 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Copyright (c) 2006-2008 The Regents of The University of Michigan 14# Copyright (c) 2010 Advanced Micro Devices, Inc. 15# All rights reserved. 16# 17# Redistribution and use in source and binary forms, with or without 18# modification, are permitted provided that the following conditions are 19# met: redistributions of source code must retain the above copyright 20# notice, this list of conditions and the following disclaimer; 21# redistributions in binary form must reproduce the above copyright 22# notice, this list of conditions and the following disclaimer in the 23# documentation and/or other materials provided with the distribution; 24# neither the name of the copyright holders nor the names of its 25# contributors may be used to endorse or promote products derived from 26# this software without specific prior written permission. 27# 28# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39# 40# Authors: Lisa Hsu 41 42import sys 43from os import getcwd 44from os.path import join as joinpath 45 46import CpuConfig 47 48import m5 49from m5.defines import buildEnv 50from m5.objects import * 51from m5.util import * 52 53addToPath('../common') 54 55def getCPUClass(cpu_type): 56 """Returns the required cpu class and the mode of operation.""" 57 cls = CpuConfig.get(cpu_type) 58 return cls, cls.memory_mode() 59 60def setCPUClass(options): 61 """Returns two cpu classes and the initial mode of operation. 62 63 Restoring from a checkpoint or fast forwarding through a benchmark 64 can be done using one type of cpu, and then the actual 65 simulation can be carried out using another type. This function 66 returns these two types of cpus and the initial mode of operation 67 depending on the options provided. 68 """ 69 70 TmpClass, test_mem_mode = getCPUClass(options.cpu_type) 71 CPUClass = None 72 if TmpClass.require_caches() and \ 73 not options.caches and not options.ruby: 74 fatal("%s must be used with caches" % options.cpu_type) 75 76 if options.checkpoint_restore != None: 77 if options.restore_with_cpu != options.cpu_type: 78 CPUClass = TmpClass 79 TmpClass, test_mem_mode = getCPUClass(options.restore_with_cpu) 80 elif options.fast_forward: 81 CPUClass = TmpClass 82 TmpClass = AtomicSimpleCPU 83 test_mem_mode = 'atomic' 84 85 return (TmpClass, test_mem_mode, CPUClass) 86 87def setWorkCountOptions(system, options): 88 if options.work_item_id != None: 89 system.work_item_id = options.work_item_id 90 if options.work_begin_cpu_id_exit != None: 91 system.work_begin_cpu_id_exit = options.work_begin_cpu_id_exit 92 if options.work_end_exit_count != None: 93 system.work_end_exit_count = options.work_end_exit_count 94 if options.work_end_checkpoint_count != None: 95 system.work_end_ckpt_count = options.work_end_checkpoint_count 96 if options.work_begin_exit_count != None: 97 system.work_begin_exit_count = options.work_begin_exit_count 98 if options.work_begin_checkpoint_count != None: 99 system.work_begin_ckpt_count = options.work_begin_checkpoint_count 100 if options.work_cpus_checkpoint_count != None: 101 system.work_cpus_ckpt_count = options.work_cpus_checkpoint_count 102 103def findCptDir(options, maxtick, cptdir, testsys): 104 """Figures out the directory from which the checkpointed state is read. 105 106 There are two different ways in which the directories holding checkpoints 107 can be named -- 108 1. cpt.<benchmark name>.<instruction count when the checkpoint was taken> 109 2. cpt.<some number, usually the tick value when the checkpoint was taken> 110 111 This function parses through the options to figure out which one of the 112 above should be used for selecting the checkpoint, and then figures out 113 the appropriate directory. 114 115 It also sets the value of the maximum tick value till which the simulation 116 will run. 117 """ 118 119 from os.path import isdir, exists 120 from os import listdir 121 import re 122 123 if not isdir(cptdir): 124 fatal("checkpoint dir %s does not exist!", cptdir) 125 126 if options.at_instruction or options.simpoint: 127 inst = options.checkpoint_restore 128 if options.simpoint: 129 # assume workload 0 has the simpoint 130 if testsys.cpu[0].workload[0].simpoint == 0: 131 fatal('Unable to find simpoint') 132 inst += int(testsys.cpu[0].workload[0].simpoint) 133 134 checkpoint_dir = joinpath(cptdir, "cpt.%s.%s" % (options.bench, inst)) 135 if not exists(checkpoint_dir): 136 fatal("Unable to find checkpoint directory %s", checkpoint_dir) 137 else: 138 dirs = listdir(cptdir) 139 expr = re.compile('cpt\.([0-9]*)') 140 cpts = [] 141 for dir in dirs: 142 match = expr.match(dir) 143 if match: 144 cpts.append(match.group(1)) 145 146 cpts.sort(lambda a,b: cmp(long(a), long(b))) 147 148 cpt_num = options.checkpoint_restore 149 if cpt_num > len(cpts): 150 fatal('Checkpoint %d not found', cpt_num) 151 152 maxtick = maxtick - int(cpts[cpt_num - 1]) 153 checkpoint_dir = joinpath(cptdir, "cpt.%s" % cpts[cpt_num - 1]) 154 155 return maxtick, checkpoint_dir 156 157def scriptCheckpoints(options, maxtick, cptdir): 158 if options.at_instruction or options.simpoint: 159 checkpoint_inst = int(options.take_checkpoints) 160 161 # maintain correct offset if we restored from some instruction 162 if options.checkpoint_restore != None: 163 checkpoint_inst += options.checkpoint_restore 164 165 print "Creating checkpoint at inst:%d" % (checkpoint_inst) 166 exit_event = m5.simulate() 167 exit_cause = exit_event.getCause() 168 print "exit cause = %s" % exit_cause 169 170 # skip checkpoint instructions should they exist 171 while exit_cause == "checkpoint": 172 exit_event = m5.simulate() 173 exit_cause = exit_event.getCause() 174 175 if exit_cause == "a thread reached the max instruction count": 176 m5.checkpoint(joinpath(cptdir, "cpt.%s.%d" % \ 177 (options.bench, checkpoint_inst))) 178 print "Checkpoint written." 179 180 else: 181 when, period = options.take_checkpoints.split(",", 1) 182 when = int(when) 183 period = int(period) 184 num_checkpoints = 0 185 186 exit_event = m5.simulate(when) 187 exit_cause = exit_event.getCause() 188 while exit_cause == "checkpoint": 189 exit_event = m5.simulate(when - m5.curTick()) 190 exit_cause = exit_event.getCause() 191 192 if exit_cause == "simulate() limit reached": 193 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 194 num_checkpoints += 1 195 196 sim_ticks = when 197 max_checkpoints = options.max_checkpoints 198 199 while num_checkpoints < max_checkpoints and \ 200 exit_cause == "simulate() limit reached": 201 if (sim_ticks + period) > maxtick: 202 exit_event = m5.simulate(maxtick - sim_ticks) 203 exit_cause = exit_event.getCause() 204 break 205 else: 206 exit_event = m5.simulate(period) 207 exit_cause = exit_event.getCause() 208 sim_ticks += period 209 while exit_event.getCause() == "checkpoint": 210 exit_event = m5.simulate(sim_ticks - m5.curTick()) 211 if exit_event.getCause() == "simulate() limit reached": 212 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 213 num_checkpoints += 1 214 215 return exit_cause 216 217def benchCheckpoints(options, maxtick, cptdir): 218 exit_event = m5.simulate(maxtick) 219 exit_cause = exit_event.getCause() 220 221 num_checkpoints = 0 222 max_checkpoints = options.max_checkpoints 223 224 while exit_cause == "checkpoint": 225 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 226 num_checkpoints += 1 227 if num_checkpoints == max_checkpoints: 228 exit_cause = "maximum %d checkpoints dropped" % max_checkpoints 229 break 230 231 exit_event = m5.simulate(maxtick - m5.curTick()) 232 exit_cause = exit_event.getCause() 233 234 return exit_event 235 236def repeatSwitch(testsys, repeat_switch_cpu_list, maxtick, switch_freq): 237 print "starting switch loop" 238 while True: 239 exit_event = m5.simulate(switch_freq) 240 exit_cause = exit_event.getCause() 241 242 if exit_cause != "simulate() limit reached": 243 return exit_event 244 245 m5.switchCpus(testsys, repeat_switch_cpu_list) 246 247 tmp_cpu_list = [] 248 for old_cpu, new_cpu in repeat_switch_cpu_list: 249 tmp_cpu_list.append((new_cpu, old_cpu)) 250 repeat_switch_cpu_list = tmp_cpu_list 251 252 if (maxtick - m5.curTick()) <= switch_freq: 253 exit_event = m5.simulate(maxtick - m5.curTick()) 254 return exit_event 255 256def run(options, root, testsys, cpu_class): 257 if options.maxtick: 258 maxtick = options.maxtick 259 elif options.maxtime: 260 simtime = m5.ticks.seconds(simtime) 261 print "simulating for: ", simtime 262 maxtick = simtime 263 else: 264 maxtick = m5.MaxTick 265 266 if options.checkpoint_dir: 267 cptdir = options.checkpoint_dir 268 elif m5.options.outdir: 269 cptdir = m5.options.outdir 270 else: 271 cptdir = getcwd() 272 273 if options.fast_forward and options.checkpoint_restore != None: 274 fatal("Can't specify both --fast-forward and --checkpoint-restore") 275 276 if options.standard_switch and not options.caches: 277 fatal("Must specify --caches when using --standard-switch") 278 279 if options.standard_switch and options.repeat_switch: 280 fatal("Can't specify both --standard-switch and --repeat-switch") 281 282 if options.repeat_switch and options.take_checkpoints: 283 fatal("Can't specify both --repeat-switch and --take-checkpoints") 284 285 np = options.num_cpus 286 switch_cpus = None 287 288 if options.prog_interval: 289 for i in xrange(np): 290 testsys.cpu[i].progress_interval = options.prog_interval 291 292 if options.maxinsts: 293 for i in xrange(np): 294 testsys.cpu[i].max_insts_any_thread = options.maxinsts 295 296 if cpu_class: 297 switch_cpus = [cpu_class(switched_out=True, cpu_id=(i)) 298 for i in xrange(np)] 299 300 for i in xrange(np): 301 if options.fast_forward: 302 testsys.cpu[i].max_insts_any_thread = int(options.fast_forward) 303 switch_cpus[i].system = testsys 304 switch_cpus[i].workload = testsys.cpu[i].workload 305 switch_cpus[i].clock = testsys.cpu[i].clock 306 # simulation period 307 if options.maxinsts: 308 switch_cpus[i].max_insts_any_thread = options.maxinsts 309 # Add checker cpu if selected 310 if options.checker: 311 switch_cpus[i].addCheckerCpu() 312 313 testsys.switch_cpus = switch_cpus 314 switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)] 315 316 if options.repeat_switch: 317 switch_class = getCPUClass(options.cpu_type)[0] 318 if switch_class.require_caches() and \ 319 not options.caches: 320 print "%s: Must be used with caches" % str(switch_class) 321 sys.exit(1) 322 if not switch_class.support_take_over(): 323 print "%s: CPU switching not supported" % str(switch_class) 324 sys.exit(1) 325 326 repeat_switch_cpus = [switch_class(switched_out=True, \ 327 cpu_id=(i)) for i in xrange(np)] 328 329 for i in xrange(np): 330 repeat_switch_cpus[i].system = testsys 331 repeat_switch_cpus[i].workload = testsys.cpu[i].workload 332 repeat_switch_cpus[i].clock = testsys.cpu[i].clock 333 334 if options.maxinsts: 335 repeat_switch_cpus[i].max_insts_any_thread = options.maxinsts 336 337 if options.checker: 338 repeat_switch_cpus[i].addCheckerCpu() 339 340 testsys.repeat_switch_cpus = repeat_switch_cpus 341 342 if cpu_class: 343 repeat_switch_cpu_list = [(switch_cpus[i], repeat_switch_cpus[i]) 344 for i in xrange(np)] 345 else: 346 repeat_switch_cpu_list = [(testsys.cpu[i], repeat_switch_cpus[i]) 347 for i in xrange(np)] 348 349 if options.standard_switch: 350 switch_cpus = [TimingSimpleCPU(switched_out=True, cpu_id=(i)) 351 for i in xrange(np)] 352 switch_cpus_1 = [DerivO3CPU(switched_out=True, cpu_id=(i)) 353 for i in xrange(np)] 354 355 for i in xrange(np): 356 switch_cpus[i].system = testsys 357 switch_cpus_1[i].system = testsys 358 switch_cpus[i].workload = testsys.cpu[i].workload 359 switch_cpus_1[i].workload = testsys.cpu[i].workload 360 switch_cpus[i].clock = testsys.cpu[i].clock 361 switch_cpus_1[i].clock = testsys.cpu[i].clock 362 363 # if restoring, make atomic cpu simulate only a few instructions 364 if options.checkpoint_restore != None: 365 testsys.cpu[i].max_insts_any_thread = 1 366 # Fast forward to specified location if we are not restoring 367 elif options.fast_forward: 368 testsys.cpu[i].max_insts_any_thread = int(options.fast_forward) 369 # Fast forward to a simpoint (warning: time consuming) 370 elif options.simpoint: 371 if testsys.cpu[i].workload[0].simpoint == 0: 372 fatal('simpoint not found') 373 testsys.cpu[i].max_insts_any_thread = \ 374 testsys.cpu[i].workload[0].simpoint 375 # No distance specified, just switch 376 else: 377 testsys.cpu[i].max_insts_any_thread = 1 378 379 # warmup period 380 if options.warmup_insts: 381 switch_cpus[i].max_insts_any_thread = options.warmup_insts 382 383 # simulation period 384 if options.maxinsts: 385 switch_cpus_1[i].max_insts_any_thread = options.maxinsts 386 387 # attach the checker cpu if selected 388 if options.checker: 389 switch_cpus[i].addCheckerCpu() 390 switch_cpus_1[i].addCheckerCpu() 391 392 testsys.switch_cpus = switch_cpus 393 testsys.switch_cpus_1 = switch_cpus_1 394 switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)] 395 switch_cpu_list1 = [(switch_cpus[i], switch_cpus_1[i]) for i in xrange(np)] 396 397 # set the checkpoint in the cpu before m5.instantiate is called 398 if options.take_checkpoints != None and \ 399 (options.simpoint or options.at_instruction): 400 offset = int(options.take_checkpoints) 401 # Set an instruction break point 402 if options.simpoint: 403 for i in xrange(np): 404 if testsys.cpu[i].workload[0].simpoint == 0: 405 fatal('no simpoint for testsys.cpu[%d].workload[0]', i) 406 checkpoint_inst = int(testsys.cpu[i].workload[0].simpoint) + offset 407 testsys.cpu[i].max_insts_any_thread = checkpoint_inst 408 # used for output below 409 options.take_checkpoints = checkpoint_inst 410 else: 411 options.take_checkpoints = offset 412 # Set all test cpus with the right number of instructions 413 # for the upcoming simulation 414 for i in xrange(np): 415 testsys.cpu[i].max_insts_any_thread = offset 416 417 checkpoint_dir = None 418 if options.checkpoint_restore != None: 419 maxtick, checkpoint_dir = findCptDir(options, maxtick, cptdir, testsys) 420 m5.instantiate(checkpoint_dir) 421 422 if options.standard_switch or cpu_class: 423 if options.standard_switch: 424 print "Switch at instruction count:%s" % \ 425 str(testsys.cpu[0].max_insts_any_thread) 426 exit_event = m5.simulate() 427 elif cpu_class and options.fast_forward: 428 print "Switch at instruction count:%s" % \ 429 str(testsys.cpu[0].max_insts_any_thread) 430 exit_event = m5.simulate() 431 else: 432 print "Switch at curTick count:%s" % str(10000) 433 exit_event = m5.simulate(10000) 434 print "Switched CPUS @ tick %s" % (m5.curTick()) 435 436 m5.switchCpus(testsys, switch_cpu_list) 437 438 if options.standard_switch: 439 print "Switch at instruction count:%d" % \ 440 (testsys.switch_cpus[0].max_insts_any_thread) 441 442 #warmup instruction count may have already been set 443 if options.warmup_insts: 444 exit_event = m5.simulate() 445 else: 446 exit_event = m5.simulate(options.standard_switch) 447 print "Switching CPUS @ tick %s" % (m5.curTick()) 448 print "Simulation ends instruction count:%d" % \ 449 (testsys.switch_cpus_1[0].max_insts_any_thread) 450 m5.switchCpus(testsys, switch_cpu_list1) 451 452 # If we're taking and restoring checkpoints, use checkpoint_dir 453 # option only for finding the checkpoints to restore from. This 454 # lets us test checkpointing by restoring from one set of 455 # checkpoints, generating a second set, and then comparing them. 456 if options.take_checkpoints and options.checkpoint_restore: 457 if m5.options.outdir: 458 cptdir = m5.options.outdir 459 else: 460 cptdir = getcwd() 461 462 if options.take_checkpoints != None : 463 # Checkpoints being taken via the command line at <when> and at 464 # subsequent periods of <period>. Checkpoint instructions 465 # received from the benchmark running are ignored and skipped in 466 # favor of command line checkpoint instructions. 467 exit_cause = scriptCheckpoints(options, maxtick, cptdir) 468 else: 469 if options.fast_forward: 470 m5.stats.reset() 471 print "**** REAL SIMULATION ****" 472 473 # If checkpoints are being taken, then the checkpoint instruction 474 # will occur in the benchmark code it self. 475 if options.repeat_switch and maxtick > options.repeat_switch: 476 exit_event = repeatSwitch(testsys, repeat_switch_cpu_list, 477 maxtick, options.repeat_switch) 478 else: 479 exit_event = benchCheckpoints(options, maxtick, cptdir) 480 481 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause()) 482 if options.checkpoint_at_end: 483 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 484 485 if not m5.options.interactive: 486 sys.exit(exit_event.getCode()) 487