Simulation.py revision 12395:322bb93e5f06
1# Copyright (c) 2012-2013 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 46from common import CpuConfig 47from common import MemConfig 48 49import m5 50from m5.defines import buildEnv 51from m5.objects import * 52from m5.util import * 53 54addToPath('../common') 55 56def getCPUClass(cpu_type): 57 """Returns the required cpu class and the mode of operation.""" 58 cls = CpuConfig.get(cpu_type) 59 return cls, cls.memory_mode() 60 61def setCPUClass(options): 62 """Returns two cpu classes and the initial mode of operation. 63 64 Restoring from a checkpoint or fast forwarding through a benchmark 65 can be done using one type of cpu, and then the actual 66 simulation can be carried out using another type. This function 67 returns these two types of cpus and the initial mode of operation 68 depending on the options provided. 69 """ 70 71 TmpClass, test_mem_mode = getCPUClass(options.cpu_type) 72 CPUClass = None 73 if TmpClass.require_caches() and \ 74 not options.caches and not options.ruby: 75 fatal("%s must be used with caches" % options.cpu_type) 76 77 if options.checkpoint_restore != None: 78 if options.restore_with_cpu != options.cpu_type: 79 CPUClass = TmpClass 80 TmpClass, test_mem_mode = getCPUClass(options.restore_with_cpu) 81 elif options.fast_forward: 82 CPUClass = TmpClass 83 TmpClass = AtomicSimpleCPU 84 test_mem_mode = 'atomic' 85 86 # Ruby only supports atomic accesses in noncaching mode 87 if test_mem_mode == 'atomic' and options.ruby: 88 warn("Memory mode will be changed to atomic_noncaching") 89 test_mem_mode = 'atomic_noncaching' 90 91 return (TmpClass, test_mem_mode, CPUClass) 92 93def setMemClass(options): 94 """Returns a memory controller class.""" 95 96 return MemConfig.get(options.mem_type) 97 98def setWorkCountOptions(system, options): 99 if options.work_item_id != None: 100 system.work_item_id = options.work_item_id 101 if options.num_work_ids != None: 102 system.num_work_ids = options.num_work_ids 103 if options.work_begin_cpu_id_exit != None: 104 system.work_begin_cpu_id_exit = options.work_begin_cpu_id_exit 105 if options.work_end_exit_count != None: 106 system.work_end_exit_count = options.work_end_exit_count 107 if options.work_end_checkpoint_count != None: 108 system.work_end_ckpt_count = options.work_end_checkpoint_count 109 if options.work_begin_exit_count != None: 110 system.work_begin_exit_count = options.work_begin_exit_count 111 if options.work_begin_checkpoint_count != None: 112 system.work_begin_ckpt_count = options.work_begin_checkpoint_count 113 if options.work_cpus_checkpoint_count != None: 114 system.work_cpus_ckpt_count = options.work_cpus_checkpoint_count 115 116def findCptDir(options, cptdir, testsys): 117 """Figures out the directory from which the checkpointed state is read. 118 119 There are two different ways in which the directories holding checkpoints 120 can be named -- 121 1. cpt.<benchmark name>.<instruction count when the checkpoint was taken> 122 2. cpt.<some number, usually the tick value when the checkpoint was taken> 123 124 This function parses through the options to figure out which one of the 125 above should be used for selecting the checkpoint, and then figures out 126 the appropriate directory. 127 """ 128 129 from os.path import isdir, exists 130 from os import listdir 131 import re 132 133 if not isdir(cptdir): 134 fatal("checkpoint dir %s does not exist!", cptdir) 135 136 cpt_starttick = 0 137 if options.at_instruction or options.simpoint: 138 inst = options.checkpoint_restore 139 if options.simpoint: 140 # assume workload 0 has the simpoint 141 if testsys.cpu[0].workload[0].simpoint == 0: 142 fatal('Unable to find simpoint') 143 inst += int(testsys.cpu[0].workload[0].simpoint) 144 145 checkpoint_dir = joinpath(cptdir, "cpt.%s.%s" % (options.bench, inst)) 146 if not exists(checkpoint_dir): 147 fatal("Unable to find checkpoint directory %s", checkpoint_dir) 148 149 elif options.restore_simpoint_checkpoint: 150 # Restore from SimPoint checkpoints 151 # Assumes that the checkpoint dir names are formatted as follows: 152 dirs = listdir(cptdir) 153 expr = re.compile('cpt\.simpoint_(\d+)_inst_(\d+)' + 154 '_weight_([\d\.e\-]+)_interval_(\d+)_warmup_(\d+)') 155 cpts = [] 156 for dir in dirs: 157 match = expr.match(dir) 158 if match: 159 cpts.append(dir) 160 cpts.sort() 161 162 cpt_num = options.checkpoint_restore 163 if cpt_num > len(cpts): 164 fatal('Checkpoint %d not found', cpt_num) 165 checkpoint_dir = joinpath(cptdir, cpts[cpt_num - 1]) 166 match = expr.match(cpts[cpt_num - 1]) 167 if match: 168 index = int(match.group(1)) 169 start_inst = int(match.group(2)) 170 weight_inst = float(match.group(3)) 171 interval_length = int(match.group(4)) 172 warmup_length = int(match.group(5)) 173 print "Resuming from", checkpoint_dir 174 simpoint_start_insts = [] 175 simpoint_start_insts.append(warmup_length) 176 simpoint_start_insts.append(warmup_length + interval_length) 177 testsys.cpu[0].simpoint_start_insts = simpoint_start_insts 178 if testsys.switch_cpus != None: 179 testsys.switch_cpus[0].simpoint_start_insts = simpoint_start_insts 180 181 print "Resuming from SimPoint", 182 print "#%d, start_inst:%d, weight:%f, interval:%d, warmup:%d" % \ 183 (index, start_inst, weight_inst, interval_length, warmup_length) 184 185 else: 186 dirs = listdir(cptdir) 187 expr = re.compile('cpt\.([0-9]+)') 188 cpts = [] 189 for dir in dirs: 190 match = expr.match(dir) 191 if match: 192 cpts.append(match.group(1)) 193 194 cpts.sort(lambda a,b: cmp(long(a), long(b))) 195 196 cpt_num = options.checkpoint_restore 197 if cpt_num > len(cpts): 198 fatal('Checkpoint %d not found', cpt_num) 199 200 cpt_starttick = int(cpts[cpt_num - 1]) 201 checkpoint_dir = joinpath(cptdir, "cpt.%s" % cpts[cpt_num - 1]) 202 203 return cpt_starttick, checkpoint_dir 204 205def scriptCheckpoints(options, maxtick, cptdir): 206 if options.at_instruction or options.simpoint: 207 checkpoint_inst = int(options.take_checkpoints) 208 209 # maintain correct offset if we restored from some instruction 210 if options.checkpoint_restore != None: 211 checkpoint_inst += options.checkpoint_restore 212 213 print "Creating checkpoint at inst:%d" % (checkpoint_inst) 214 exit_event = m5.simulate() 215 exit_cause = exit_event.getCause() 216 print "exit cause = %s" % exit_cause 217 218 # skip checkpoint instructions should they exist 219 while exit_cause == "checkpoint": 220 exit_event = m5.simulate() 221 exit_cause = exit_event.getCause() 222 223 if exit_cause == "a thread reached the max instruction count": 224 m5.checkpoint(joinpath(cptdir, "cpt.%s.%d" % \ 225 (options.bench, checkpoint_inst))) 226 print "Checkpoint written." 227 228 else: 229 when, period = options.take_checkpoints.split(",", 1) 230 when = int(when) 231 period = int(period) 232 num_checkpoints = 0 233 234 exit_event = m5.simulate(when - m5.curTick()) 235 exit_cause = exit_event.getCause() 236 while exit_cause == "checkpoint": 237 exit_event = m5.simulate(when - m5.curTick()) 238 exit_cause = exit_event.getCause() 239 240 if exit_cause == "simulate() limit reached": 241 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 242 num_checkpoints += 1 243 244 sim_ticks = when 245 max_checkpoints = options.max_checkpoints 246 247 while num_checkpoints < max_checkpoints and \ 248 exit_cause == "simulate() limit reached": 249 if (sim_ticks + period) > maxtick: 250 exit_event = m5.simulate(maxtick - sim_ticks) 251 exit_cause = exit_event.getCause() 252 break 253 else: 254 exit_event = m5.simulate(period) 255 exit_cause = exit_event.getCause() 256 sim_ticks += period 257 while exit_event.getCause() == "checkpoint": 258 exit_event = m5.simulate(sim_ticks - m5.curTick()) 259 if exit_event.getCause() == "simulate() limit reached": 260 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 261 num_checkpoints += 1 262 263 return exit_event 264 265def benchCheckpoints(options, maxtick, cptdir): 266 exit_event = m5.simulate(maxtick - m5.curTick()) 267 exit_cause = exit_event.getCause() 268 269 num_checkpoints = 0 270 max_checkpoints = options.max_checkpoints 271 272 while exit_cause == "checkpoint": 273 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 274 num_checkpoints += 1 275 if num_checkpoints == max_checkpoints: 276 exit_cause = "maximum %d checkpoints dropped" % max_checkpoints 277 break 278 279 exit_event = m5.simulate(maxtick - m5.curTick()) 280 exit_cause = exit_event.getCause() 281 282 return exit_event 283 284# Set up environment for taking SimPoint checkpoints 285# Expecting SimPoint files generated by SimPoint 3.2 286def parseSimpointAnalysisFile(options, testsys): 287 import re 288 289 simpoint_filename, weight_filename, interval_length, warmup_length = \ 290 options.take_simpoint_checkpoints.split(",", 3) 291 print "simpoint analysis file:", simpoint_filename 292 print "simpoint weight file:", weight_filename 293 print "interval length:", interval_length 294 print "warmup length:", warmup_length 295 296 interval_length = int(interval_length) 297 warmup_length = int(warmup_length) 298 299 # Simpoint analysis output starts interval counts with 0. 300 simpoints = [] 301 simpoint_start_insts = [] 302 303 # Read in SimPoint analysis files 304 simpoint_file = open(simpoint_filename) 305 weight_file = open(weight_filename) 306 while True: 307 line = simpoint_file.readline() 308 if not line: 309 break 310 m = re.match("(\d+)\s+(\d+)", line) 311 if m: 312 interval = int(m.group(1)) 313 else: 314 fatal('unrecognized line in simpoint file!') 315 316 line = weight_file.readline() 317 if not line: 318 fatal('not enough lines in simpoint weight file!') 319 m = re.match("([0-9\.e\-]+)\s+(\d+)", line) 320 if m: 321 weight = float(m.group(1)) 322 else: 323 fatal('unrecognized line in simpoint weight file!') 324 325 if (interval * interval_length - warmup_length > 0): 326 starting_inst_count = \ 327 interval * interval_length - warmup_length 328 actual_warmup_length = warmup_length 329 else: 330 # Not enough room for proper warmup 331 # Just starting from the beginning 332 starting_inst_count = 0 333 actual_warmup_length = interval * interval_length 334 335 simpoints.append((interval, weight, starting_inst_count, 336 actual_warmup_length)) 337 338 # Sort SimPoints by starting inst count 339 simpoints.sort(key=lambda obj: obj[2]) 340 for s in simpoints: 341 interval, weight, starting_inst_count, actual_warmup_length = s 342 print str(interval), str(weight), starting_inst_count, \ 343 actual_warmup_length 344 simpoint_start_insts.append(starting_inst_count) 345 346 print "Total # of simpoints:", len(simpoints) 347 testsys.cpu[0].simpoint_start_insts = simpoint_start_insts 348 349 return (simpoints, interval_length) 350 351def takeSimpointCheckpoints(simpoints, interval_length, cptdir): 352 num_checkpoints = 0 353 index = 0 354 last_chkpnt_inst_count = -1 355 for simpoint in simpoints: 356 interval, weight, starting_inst_count, actual_warmup_length = simpoint 357 if starting_inst_count == last_chkpnt_inst_count: 358 # checkpoint starting point same as last time 359 # (when warmup period longer than starting point) 360 exit_cause = "simpoint starting point found" 361 code = 0 362 else: 363 exit_event = m5.simulate() 364 365 # skip checkpoint instructions should they exist 366 while exit_event.getCause() == "checkpoint": 367 print "Found 'checkpoint' exit event...ignoring..." 368 exit_event = m5.simulate() 369 370 exit_cause = exit_event.getCause() 371 code = exit_event.getCode() 372 373 if exit_cause == "simpoint starting point found": 374 m5.checkpoint(joinpath(cptdir, 375 "cpt.simpoint_%02d_inst_%d_weight_%f_interval_%d_warmup_%d" 376 % (index, starting_inst_count, weight, interval_length, 377 actual_warmup_length))) 378 print "Checkpoint #%d written. start inst:%d weight:%f" % \ 379 (num_checkpoints, starting_inst_count, weight) 380 num_checkpoints += 1 381 last_chkpnt_inst_count = starting_inst_count 382 else: 383 break 384 index += 1 385 386 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_cause) 387 print "%d checkpoints taken" % num_checkpoints 388 sys.exit(code) 389 390def restoreSimpointCheckpoint(): 391 exit_event = m5.simulate() 392 exit_cause = exit_event.getCause() 393 394 if exit_cause == "simpoint starting point found": 395 print "Warmed up! Dumping and resetting stats!" 396 m5.stats.dump() 397 m5.stats.reset() 398 399 exit_event = m5.simulate() 400 exit_cause = exit_event.getCause() 401 402 if exit_cause == "simpoint starting point found": 403 print "Done running SimPoint!" 404 sys.exit(exit_event.getCode()) 405 406 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_cause) 407 sys.exit(exit_event.getCode()) 408 409def repeatSwitch(testsys, repeat_switch_cpu_list, maxtick, switch_freq): 410 print "starting switch loop" 411 while True: 412 exit_event = m5.simulate(switch_freq) 413 exit_cause = exit_event.getCause() 414 415 if exit_cause != "simulate() limit reached": 416 return exit_event 417 418 m5.switchCpus(testsys, repeat_switch_cpu_list) 419 420 tmp_cpu_list = [] 421 for old_cpu, new_cpu in repeat_switch_cpu_list: 422 tmp_cpu_list.append((new_cpu, old_cpu)) 423 repeat_switch_cpu_list = tmp_cpu_list 424 425 if (maxtick - m5.curTick()) <= switch_freq: 426 exit_event = m5.simulate(maxtick - m5.curTick()) 427 return exit_event 428 429def run(options, root, testsys, cpu_class): 430 if options.checkpoint_dir: 431 cptdir = options.checkpoint_dir 432 elif m5.options.outdir: 433 cptdir = m5.options.outdir 434 else: 435 cptdir = getcwd() 436 437 if options.fast_forward and options.checkpoint_restore != None: 438 fatal("Can't specify both --fast-forward and --checkpoint-restore") 439 440 if options.standard_switch and not options.caches: 441 fatal("Must specify --caches when using --standard-switch") 442 443 if options.standard_switch and options.repeat_switch: 444 fatal("Can't specify both --standard-switch and --repeat-switch") 445 446 if options.repeat_switch and options.take_checkpoints: 447 fatal("Can't specify both --repeat-switch and --take-checkpoints") 448 449 np = options.num_cpus 450 switch_cpus = None 451 452 if options.prog_interval: 453 for i in xrange(np): 454 testsys.cpu[i].progress_interval = options.prog_interval 455 456 if options.maxinsts: 457 for i in xrange(np): 458 testsys.cpu[i].max_insts_any_thread = options.maxinsts 459 460 if cpu_class: 461 switch_cpus = [cpu_class(switched_out=True, cpu_id=(i)) 462 for i in xrange(np)] 463 464 for i in xrange(np): 465 if options.fast_forward: 466 testsys.cpu[i].max_insts_any_thread = int(options.fast_forward) 467 switch_cpus[i].system = testsys 468 switch_cpus[i].workload = testsys.cpu[i].workload 469 switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain 470 switch_cpus[i].progress_interval = \ 471 testsys.cpu[i].progress_interval 472 switch_cpus[i].isa = testsys.cpu[i].isa 473 # simulation period 474 if options.maxinsts: 475 switch_cpus[i].max_insts_any_thread = options.maxinsts 476 # Add checker cpu if selected 477 if options.checker: 478 switch_cpus[i].addCheckerCpu() 479 480 # If elastic tracing is enabled attach the elastic trace probe 481 # to the switch CPUs 482 if options.elastic_trace_en: 483 CpuConfig.config_etrace(cpu_class, switch_cpus, options) 484 485 testsys.switch_cpus = switch_cpus 486 switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)] 487 488 if options.repeat_switch: 489 switch_class = getCPUClass(options.cpu_type)[0] 490 if switch_class.require_caches() and \ 491 not options.caches: 492 print "%s: Must be used with caches" % str(switch_class) 493 sys.exit(1) 494 if not switch_class.support_take_over(): 495 print "%s: CPU switching not supported" % str(switch_class) 496 sys.exit(1) 497 498 repeat_switch_cpus = [switch_class(switched_out=True, \ 499 cpu_id=(i)) for i in xrange(np)] 500 501 for i in xrange(np): 502 repeat_switch_cpus[i].system = testsys 503 repeat_switch_cpus[i].workload = testsys.cpu[i].workload 504 repeat_switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain 505 repeat_switch_cpus[i].isa = testsys.cpu[i].isa 506 507 if options.maxinsts: 508 repeat_switch_cpus[i].max_insts_any_thread = options.maxinsts 509 510 if options.checker: 511 repeat_switch_cpus[i].addCheckerCpu() 512 513 testsys.repeat_switch_cpus = repeat_switch_cpus 514 515 if cpu_class: 516 repeat_switch_cpu_list = [(switch_cpus[i], repeat_switch_cpus[i]) 517 for i in xrange(np)] 518 else: 519 repeat_switch_cpu_list = [(testsys.cpu[i], repeat_switch_cpus[i]) 520 for i in xrange(np)] 521 522 if options.standard_switch: 523 switch_cpus = [TimingSimpleCPU(switched_out=True, cpu_id=(i)) 524 for i in xrange(np)] 525 switch_cpus_1 = [DerivO3CPU(switched_out=True, cpu_id=(i)) 526 for i in xrange(np)] 527 528 for i in xrange(np): 529 switch_cpus[i].system = testsys 530 switch_cpus_1[i].system = testsys 531 switch_cpus[i].workload = testsys.cpu[i].workload 532 switch_cpus_1[i].workload = testsys.cpu[i].workload 533 switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain 534 switch_cpus_1[i].clk_domain = testsys.cpu[i].clk_domain 535 switch_cpus[i].isa = testsys.cpu[i].isa 536 switch_cpus_1[i].isa = testsys.cpu[i].isa 537 538 # if restoring, make atomic cpu simulate only a few instructions 539 if options.checkpoint_restore != None: 540 testsys.cpu[i].max_insts_any_thread = 1 541 # Fast forward to specified location if we are not restoring 542 elif options.fast_forward: 543 testsys.cpu[i].max_insts_any_thread = int(options.fast_forward) 544 # Fast forward to a simpoint (warning: time consuming) 545 elif options.simpoint: 546 if testsys.cpu[i].workload[0].simpoint == 0: 547 fatal('simpoint not found') 548 testsys.cpu[i].max_insts_any_thread = \ 549 testsys.cpu[i].workload[0].simpoint 550 # No distance specified, just switch 551 else: 552 testsys.cpu[i].max_insts_any_thread = 1 553 554 # warmup period 555 if options.warmup_insts: 556 switch_cpus[i].max_insts_any_thread = options.warmup_insts 557 558 # simulation period 559 if options.maxinsts: 560 switch_cpus_1[i].max_insts_any_thread = options.maxinsts 561 562 # attach the checker cpu if selected 563 if options.checker: 564 switch_cpus[i].addCheckerCpu() 565 switch_cpus_1[i].addCheckerCpu() 566 567 testsys.switch_cpus = switch_cpus 568 testsys.switch_cpus_1 = switch_cpus_1 569 switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)] 570 switch_cpu_list1 = [(switch_cpus[i], switch_cpus_1[i]) for i in xrange(np)] 571 572 # set the checkpoint in the cpu before m5.instantiate is called 573 if options.take_checkpoints != None and \ 574 (options.simpoint or options.at_instruction): 575 offset = int(options.take_checkpoints) 576 # Set an instruction break point 577 if options.simpoint: 578 for i in xrange(np): 579 if testsys.cpu[i].workload[0].simpoint == 0: 580 fatal('no simpoint for testsys.cpu[%d].workload[0]', i) 581 checkpoint_inst = int(testsys.cpu[i].workload[0].simpoint) + offset 582 testsys.cpu[i].max_insts_any_thread = checkpoint_inst 583 # used for output below 584 options.take_checkpoints = checkpoint_inst 585 else: 586 options.take_checkpoints = offset 587 # Set all test cpus with the right number of instructions 588 # for the upcoming simulation 589 for i in xrange(np): 590 testsys.cpu[i].max_insts_any_thread = offset 591 592 if options.take_simpoint_checkpoints != None: 593 simpoints, interval_length = parseSimpointAnalysisFile(options, testsys) 594 595 checkpoint_dir = None 596 if options.checkpoint_restore: 597 cpt_starttick, checkpoint_dir = findCptDir(options, cptdir, testsys) 598 m5.instantiate(checkpoint_dir) 599 600 # Initialization is complete. If we're not in control of simulation 601 # (that is, if we're a slave simulator acting as a component in another 602 # 'master' simulator) then we're done here. The other simulator will 603 # call simulate() directly. --initialize-only is used to indicate this. 604 if options.initialize_only: 605 return 606 607 # Handle the max tick settings now that tick frequency was resolved 608 # during system instantiation 609 # NOTE: the maxtick variable here is in absolute ticks, so it must 610 # include any simulated ticks before a checkpoint 611 explicit_maxticks = 0 612 maxtick_from_abs = m5.MaxTick 613 maxtick_from_rel = m5.MaxTick 614 maxtick_from_maxtime = m5.MaxTick 615 if options.abs_max_tick: 616 maxtick_from_abs = options.abs_max_tick 617 explicit_maxticks += 1 618 if options.rel_max_tick: 619 maxtick_from_rel = options.rel_max_tick 620 if options.checkpoint_restore: 621 # NOTE: this may need to be updated if checkpoints ever store 622 # the ticks per simulated second 623 maxtick_from_rel += cpt_starttick 624 if options.at_instruction or options.simpoint: 625 warn("Relative max tick specified with --at-instruction or" \ 626 " --simpoint\n These options don't specify the " \ 627 "checkpoint start tick, so assuming\n you mean " \ 628 "absolute max tick") 629 explicit_maxticks += 1 630 if options.maxtime: 631 maxtick_from_maxtime = m5.ticks.fromSeconds(options.maxtime) 632 explicit_maxticks += 1 633 if explicit_maxticks > 1: 634 warn("Specified multiple of --abs-max-tick, --rel-max-tick, --maxtime."\ 635 " Using least") 636 maxtick = min([maxtick_from_abs, maxtick_from_rel, maxtick_from_maxtime]) 637 638 if options.checkpoint_restore != None and maxtick < cpt_starttick: 639 fatal("Bad maxtick (%d) specified: " \ 640 "Checkpoint starts starts from tick: %d", maxtick, cpt_starttick) 641 642 if options.standard_switch or cpu_class: 643 if options.standard_switch: 644 print "Switch at instruction count:%s" % \ 645 str(testsys.cpu[0].max_insts_any_thread) 646 exit_event = m5.simulate() 647 elif cpu_class and options.fast_forward: 648 print "Switch at instruction count:%s" % \ 649 str(testsys.cpu[0].max_insts_any_thread) 650 exit_event = m5.simulate() 651 else: 652 print "Switch at curTick count:%s" % str(10000) 653 exit_event = m5.simulate(10000) 654 print "Switched CPUS @ tick %s" % (m5.curTick()) 655 656 m5.switchCpus(testsys, switch_cpu_list) 657 658 if options.standard_switch: 659 print "Switch at instruction count:%d" % \ 660 (testsys.switch_cpus[0].max_insts_any_thread) 661 662 #warmup instruction count may have already been set 663 if options.warmup_insts: 664 exit_event = m5.simulate() 665 else: 666 exit_event = m5.simulate(options.standard_switch) 667 print "Switching CPUS @ tick %s" % (m5.curTick()) 668 print "Simulation ends instruction count:%d" % \ 669 (testsys.switch_cpus_1[0].max_insts_any_thread) 670 m5.switchCpus(testsys, switch_cpu_list1) 671 672 # If we're taking and restoring checkpoints, use checkpoint_dir 673 # option only for finding the checkpoints to restore from. This 674 # lets us test checkpointing by restoring from one set of 675 # checkpoints, generating a second set, and then comparing them. 676 if (options.take_checkpoints or options.take_simpoint_checkpoints) \ 677 and options.checkpoint_restore: 678 679 if m5.options.outdir: 680 cptdir = m5.options.outdir 681 else: 682 cptdir = getcwd() 683 684 if options.take_checkpoints != None : 685 # Checkpoints being taken via the command line at <when> and at 686 # subsequent periods of <period>. Checkpoint instructions 687 # received from the benchmark running are ignored and skipped in 688 # favor of command line checkpoint instructions. 689 exit_event = scriptCheckpoints(options, maxtick, cptdir) 690 691 # Take SimPoint checkpoints 692 elif options.take_simpoint_checkpoints != None: 693 takeSimpointCheckpoints(simpoints, interval_length, cptdir) 694 695 # Restore from SimPoint checkpoints 696 elif options.restore_simpoint_checkpoint != None: 697 restoreSimpointCheckpoint() 698 699 else: 700 if options.fast_forward: 701 m5.stats.reset() 702 print "**** REAL SIMULATION ****" 703 704 # If checkpoints are being taken, then the checkpoint instruction 705 # will occur in the benchmark code it self. 706 if options.repeat_switch and maxtick > options.repeat_switch: 707 exit_event = repeatSwitch(testsys, repeat_switch_cpu_list, 708 maxtick, options.repeat_switch) 709 else: 710 exit_event = benchCheckpoints(options, maxtick, cptdir) 711 712 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause()) 713 if options.checkpoint_at_end: 714 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 715 716 if not m5.options.interactive: 717 sys.exit(exit_event.getCode()) 718