Simulation.py revision 11688:725fef71f376
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 return (TmpClass, test_mem_mode, CPUClass) 87 88def setMemClass(options): 89 """Returns a memory controller class.""" 90 91 return MemConfig.get(options.mem_type) 92 93def setWorkCountOptions(system, options): 94 if options.work_item_id != None: 95 system.work_item_id = options.work_item_id 96 if options.num_work_ids != None: 97 system.num_work_ids = options.num_work_ids 98 if options.work_begin_cpu_id_exit != None: 99 system.work_begin_cpu_id_exit = options.work_begin_cpu_id_exit 100 if options.work_end_exit_count != None: 101 system.work_end_exit_count = options.work_end_exit_count 102 if options.work_end_checkpoint_count != None: 103 system.work_end_ckpt_count = options.work_end_checkpoint_count 104 if options.work_begin_exit_count != None: 105 system.work_begin_exit_count = options.work_begin_exit_count 106 if options.work_begin_checkpoint_count != None: 107 system.work_begin_ckpt_count = options.work_begin_checkpoint_count 108 if options.work_cpus_checkpoint_count != None: 109 system.work_cpus_ckpt_count = options.work_cpus_checkpoint_count 110 111def findCptDir(options, cptdir, testsys): 112 """Figures out the directory from which the checkpointed state is read. 113 114 There are two different ways in which the directories holding checkpoints 115 can be named -- 116 1. cpt.<benchmark name>.<instruction count when the checkpoint was taken> 117 2. cpt.<some number, usually the tick value when the checkpoint was taken> 118 119 This function parses through the options to figure out which one of the 120 above should be used for selecting the checkpoint, and then figures out 121 the appropriate directory. 122 """ 123 124 from os.path import isdir, exists 125 from os import listdir 126 import re 127 128 if not isdir(cptdir): 129 fatal("checkpoint dir %s does not exist!", cptdir) 130 131 cpt_starttick = 0 132 if options.at_instruction or options.simpoint: 133 inst = options.checkpoint_restore 134 if options.simpoint: 135 # assume workload 0 has the simpoint 136 if testsys.cpu[0].workload[0].simpoint == 0: 137 fatal('Unable to find simpoint') 138 inst += int(testsys.cpu[0].workload[0].simpoint) 139 140 checkpoint_dir = joinpath(cptdir, "cpt.%s.%s" % (options.bench, inst)) 141 if not exists(checkpoint_dir): 142 fatal("Unable to find checkpoint directory %s", checkpoint_dir) 143 144 elif options.restore_simpoint_checkpoint: 145 # Restore from SimPoint checkpoints 146 # Assumes that the checkpoint dir names are formatted as follows: 147 dirs = listdir(cptdir) 148 expr = re.compile('cpt\.simpoint_(\d+)_inst_(\d+)' + 149 '_weight_([\d\.e\-]+)_interval_(\d+)_warmup_(\d+)') 150 cpts = [] 151 for dir in dirs: 152 match = expr.match(dir) 153 if match: 154 cpts.append(dir) 155 cpts.sort() 156 157 cpt_num = options.checkpoint_restore 158 if cpt_num > len(cpts): 159 fatal('Checkpoint %d not found', cpt_num) 160 checkpoint_dir = joinpath(cptdir, cpts[cpt_num - 1]) 161 match = expr.match(cpts[cpt_num - 1]) 162 if match: 163 index = int(match.group(1)) 164 start_inst = int(match.group(2)) 165 weight_inst = float(match.group(3)) 166 interval_length = int(match.group(4)) 167 warmup_length = int(match.group(5)) 168 print "Resuming from", checkpoint_dir 169 simpoint_start_insts = [] 170 simpoint_start_insts.append(warmup_length) 171 simpoint_start_insts.append(warmup_length + interval_length) 172 testsys.cpu[0].simpoint_start_insts = simpoint_start_insts 173 if testsys.switch_cpus != None: 174 testsys.switch_cpus[0].simpoint_start_insts = simpoint_start_insts 175 176 print "Resuming from SimPoint", 177 print "#%d, start_inst:%d, weight:%f, interval:%d, warmup:%d" % \ 178 (index, start_inst, weight_inst, interval_length, warmup_length) 179 180 else: 181 dirs = listdir(cptdir) 182 expr = re.compile('cpt\.([0-9]+)') 183 cpts = [] 184 for dir in dirs: 185 match = expr.match(dir) 186 if match: 187 cpts.append(match.group(1)) 188 189 cpts.sort(lambda a,b: cmp(long(a), long(b))) 190 191 cpt_num = options.checkpoint_restore 192 if cpt_num > len(cpts): 193 fatal('Checkpoint %d not found', cpt_num) 194 195 cpt_starttick = int(cpts[cpt_num - 1]) 196 checkpoint_dir = joinpath(cptdir, "cpt.%s" % cpts[cpt_num - 1]) 197 198 return cpt_starttick, checkpoint_dir 199 200def scriptCheckpoints(options, maxtick, cptdir): 201 if options.at_instruction or options.simpoint: 202 checkpoint_inst = int(options.take_checkpoints) 203 204 # maintain correct offset if we restored from some instruction 205 if options.checkpoint_restore != None: 206 checkpoint_inst += options.checkpoint_restore 207 208 print "Creating checkpoint at inst:%d" % (checkpoint_inst) 209 exit_event = m5.simulate() 210 exit_cause = exit_event.getCause() 211 print "exit cause = %s" % exit_cause 212 213 # skip checkpoint instructions should they exist 214 while exit_cause == "checkpoint": 215 exit_event = m5.simulate() 216 exit_cause = exit_event.getCause() 217 218 if exit_cause == "a thread reached the max instruction count": 219 m5.checkpoint(joinpath(cptdir, "cpt.%s.%d" % \ 220 (options.bench, checkpoint_inst))) 221 print "Checkpoint written." 222 223 else: 224 when, period = options.take_checkpoints.split(",", 1) 225 when = int(when) 226 period = int(period) 227 num_checkpoints = 0 228 229 exit_event = m5.simulate(when - m5.curTick()) 230 exit_cause = exit_event.getCause() 231 while exit_cause == "checkpoint": 232 exit_event = m5.simulate(when - m5.curTick()) 233 exit_cause = exit_event.getCause() 234 235 if exit_cause == "simulate() limit reached": 236 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 237 num_checkpoints += 1 238 239 sim_ticks = when 240 max_checkpoints = options.max_checkpoints 241 242 while num_checkpoints < max_checkpoints and \ 243 exit_cause == "simulate() limit reached": 244 if (sim_ticks + period) > maxtick: 245 exit_event = m5.simulate(maxtick - sim_ticks) 246 exit_cause = exit_event.getCause() 247 break 248 else: 249 exit_event = m5.simulate(period) 250 exit_cause = exit_event.getCause() 251 sim_ticks += period 252 while exit_event.getCause() == "checkpoint": 253 exit_event = m5.simulate(sim_ticks - m5.curTick()) 254 if exit_event.getCause() == "simulate() limit reached": 255 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 256 num_checkpoints += 1 257 258 return exit_event 259 260def benchCheckpoints(options, maxtick, cptdir): 261 exit_event = m5.simulate(maxtick - m5.curTick()) 262 exit_cause = exit_event.getCause() 263 264 num_checkpoints = 0 265 max_checkpoints = options.max_checkpoints 266 267 while exit_cause == "checkpoint": 268 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 269 num_checkpoints += 1 270 if num_checkpoints == max_checkpoints: 271 exit_cause = "maximum %d checkpoints dropped" % max_checkpoints 272 break 273 274 exit_event = m5.simulate(maxtick - m5.curTick()) 275 exit_cause = exit_event.getCause() 276 277 return exit_event 278 279# Set up environment for taking SimPoint checkpoints 280# Expecting SimPoint files generated by SimPoint 3.2 281def parseSimpointAnalysisFile(options, testsys): 282 import re 283 284 simpoint_filename, weight_filename, interval_length, warmup_length = \ 285 options.take_simpoint_checkpoints.split(",", 3) 286 print "simpoint analysis file:", simpoint_filename 287 print "simpoint weight file:", weight_filename 288 print "interval length:", interval_length 289 print "warmup length:", warmup_length 290 291 interval_length = int(interval_length) 292 warmup_length = int(warmup_length) 293 294 # Simpoint analysis output starts interval counts with 0. 295 simpoints = [] 296 simpoint_start_insts = [] 297 298 # Read in SimPoint analysis files 299 simpoint_file = open(simpoint_filename) 300 weight_file = open(weight_filename) 301 while True: 302 line = simpoint_file.readline() 303 if not line: 304 break 305 m = re.match("(\d+)\s+(\d+)", line) 306 if m: 307 interval = int(m.group(1)) 308 else: 309 fatal('unrecognized line in simpoint file!') 310 311 line = weight_file.readline() 312 if not line: 313 fatal('not enough lines in simpoint weight file!') 314 m = re.match("([0-9\.e\-]+)\s+(\d+)", line) 315 if m: 316 weight = float(m.group(1)) 317 else: 318 fatal('unrecognized line in simpoint weight file!') 319 320 if (interval * interval_length - warmup_length > 0): 321 starting_inst_count = \ 322 interval * interval_length - warmup_length 323 actual_warmup_length = warmup_length 324 else: 325 # Not enough room for proper warmup 326 # Just starting from the beginning 327 starting_inst_count = 0 328 actual_warmup_length = interval * interval_length 329 330 simpoints.append((interval, weight, starting_inst_count, 331 actual_warmup_length)) 332 333 # Sort SimPoints by starting inst count 334 simpoints.sort(key=lambda obj: obj[2]) 335 for s in simpoints: 336 interval, weight, starting_inst_count, actual_warmup_length = s 337 print str(interval), str(weight), starting_inst_count, \ 338 actual_warmup_length 339 simpoint_start_insts.append(starting_inst_count) 340 341 print "Total # of simpoints:", len(simpoints) 342 testsys.cpu[0].simpoint_start_insts = simpoint_start_insts 343 344 return (simpoints, interval_length) 345 346def takeSimpointCheckpoints(simpoints, interval_length, cptdir): 347 num_checkpoints = 0 348 index = 0 349 last_chkpnt_inst_count = -1 350 for simpoint in simpoints: 351 interval, weight, starting_inst_count, actual_warmup_length = simpoint 352 if starting_inst_count == last_chkpnt_inst_count: 353 # checkpoint starting point same as last time 354 # (when warmup period longer than starting point) 355 exit_cause = "simpoint starting point found" 356 code = 0 357 else: 358 exit_event = m5.simulate() 359 360 # skip checkpoint instructions should they exist 361 while exit_event.getCause() == "checkpoint": 362 print "Found 'checkpoint' exit event...ignoring..." 363 exit_event = m5.simulate() 364 365 exit_cause = exit_event.getCause() 366 code = exit_event.getCode() 367 368 if exit_cause == "simpoint starting point found": 369 m5.checkpoint(joinpath(cptdir, 370 "cpt.simpoint_%02d_inst_%d_weight_%f_interval_%d_warmup_%d" 371 % (index, starting_inst_count, weight, interval_length, 372 actual_warmup_length))) 373 print "Checkpoint #%d written. start inst:%d weight:%f" % \ 374 (num_checkpoints, starting_inst_count, weight) 375 num_checkpoints += 1 376 last_chkpnt_inst_count = starting_inst_count 377 else: 378 break 379 index += 1 380 381 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_cause) 382 print "%d checkpoints taken" % num_checkpoints 383 sys.exit(code) 384 385def restoreSimpointCheckpoint(): 386 exit_event = m5.simulate() 387 exit_cause = exit_event.getCause() 388 389 if exit_cause == "simpoint starting point found": 390 print "Warmed up! Dumping and resetting stats!" 391 m5.stats.dump() 392 m5.stats.reset() 393 394 exit_event = m5.simulate() 395 exit_cause = exit_event.getCause() 396 397 if exit_cause == "simpoint starting point found": 398 print "Done running SimPoint!" 399 sys.exit(exit_event.getCode()) 400 401 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_cause) 402 sys.exit(exit_event.getCode()) 403 404def repeatSwitch(testsys, repeat_switch_cpu_list, maxtick, switch_freq): 405 print "starting switch loop" 406 while True: 407 exit_event = m5.simulate(switch_freq) 408 exit_cause = exit_event.getCause() 409 410 if exit_cause != "simulate() limit reached": 411 return exit_event 412 413 m5.switchCpus(testsys, repeat_switch_cpu_list) 414 415 tmp_cpu_list = [] 416 for old_cpu, new_cpu in repeat_switch_cpu_list: 417 tmp_cpu_list.append((new_cpu, old_cpu)) 418 repeat_switch_cpu_list = tmp_cpu_list 419 420 if (maxtick - m5.curTick()) <= switch_freq: 421 exit_event = m5.simulate(maxtick - m5.curTick()) 422 return exit_event 423 424def run(options, root, testsys, cpu_class): 425 if options.checkpoint_dir: 426 cptdir = options.checkpoint_dir 427 elif m5.options.outdir: 428 cptdir = m5.options.outdir 429 else: 430 cptdir = getcwd() 431 432 if options.fast_forward and options.checkpoint_restore != None: 433 fatal("Can't specify both --fast-forward and --checkpoint-restore") 434 435 if options.standard_switch and not options.caches: 436 fatal("Must specify --caches when using --standard-switch") 437 438 if options.standard_switch and options.repeat_switch: 439 fatal("Can't specify both --standard-switch and --repeat-switch") 440 441 if options.repeat_switch and options.take_checkpoints: 442 fatal("Can't specify both --repeat-switch and --take-checkpoints") 443 444 np = options.num_cpus 445 switch_cpus = None 446 447 if options.prog_interval: 448 for i in xrange(np): 449 testsys.cpu[i].progress_interval = options.prog_interval 450 451 if options.maxinsts: 452 for i in xrange(np): 453 testsys.cpu[i].max_insts_any_thread = options.maxinsts 454 455 if cpu_class: 456 switch_cpus = [cpu_class(switched_out=True, cpu_id=(i)) 457 for i in xrange(np)] 458 459 for i in xrange(np): 460 if options.fast_forward: 461 testsys.cpu[i].max_insts_any_thread = int(options.fast_forward) 462 switch_cpus[i].system = testsys 463 switch_cpus[i].workload = testsys.cpu[i].workload 464 switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain 465 switch_cpus[i].progress_interval = \ 466 testsys.cpu[i].progress_interval 467 # simulation period 468 if options.maxinsts: 469 switch_cpus[i].max_insts_any_thread = options.maxinsts 470 # Add checker cpu if selected 471 if options.checker: 472 switch_cpus[i].addCheckerCpu() 473 474 # If elastic tracing is enabled attach the elastic trace probe 475 # to the switch CPUs 476 if options.elastic_trace_en: 477 CpuConfig.config_etrace(cpu_class, switch_cpus, options) 478 479 testsys.switch_cpus = switch_cpus 480 switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)] 481 482 if options.repeat_switch: 483 switch_class = getCPUClass(options.cpu_type)[0] 484 if switch_class.require_caches() and \ 485 not options.caches: 486 print "%s: Must be used with caches" % str(switch_class) 487 sys.exit(1) 488 if not switch_class.support_take_over(): 489 print "%s: CPU switching not supported" % str(switch_class) 490 sys.exit(1) 491 492 repeat_switch_cpus = [switch_class(switched_out=True, \ 493 cpu_id=(i)) for i in xrange(np)] 494 495 for i in xrange(np): 496 repeat_switch_cpus[i].system = testsys 497 repeat_switch_cpus[i].workload = testsys.cpu[i].workload 498 repeat_switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain 499 500 if options.maxinsts: 501 repeat_switch_cpus[i].max_insts_any_thread = options.maxinsts 502 503 if options.checker: 504 repeat_switch_cpus[i].addCheckerCpu() 505 506 testsys.repeat_switch_cpus = repeat_switch_cpus 507 508 if cpu_class: 509 repeat_switch_cpu_list = [(switch_cpus[i], repeat_switch_cpus[i]) 510 for i in xrange(np)] 511 else: 512 repeat_switch_cpu_list = [(testsys.cpu[i], repeat_switch_cpus[i]) 513 for i in xrange(np)] 514 515 if options.standard_switch: 516 switch_cpus = [TimingSimpleCPU(switched_out=True, cpu_id=(i)) 517 for i in xrange(np)] 518 switch_cpus_1 = [DerivO3CPU(switched_out=True, cpu_id=(i)) 519 for i in xrange(np)] 520 521 for i in xrange(np): 522 switch_cpus[i].system = testsys 523 switch_cpus_1[i].system = testsys 524 switch_cpus[i].workload = testsys.cpu[i].workload 525 switch_cpus_1[i].workload = testsys.cpu[i].workload 526 switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain 527 switch_cpus_1[i].clk_domain = testsys.cpu[i].clk_domain 528 529 # if restoring, make atomic cpu simulate only a few instructions 530 if options.checkpoint_restore != None: 531 testsys.cpu[i].max_insts_any_thread = 1 532 # Fast forward to specified location if we are not restoring 533 elif options.fast_forward: 534 testsys.cpu[i].max_insts_any_thread = int(options.fast_forward) 535 # Fast forward to a simpoint (warning: time consuming) 536 elif options.simpoint: 537 if testsys.cpu[i].workload[0].simpoint == 0: 538 fatal('simpoint not found') 539 testsys.cpu[i].max_insts_any_thread = \ 540 testsys.cpu[i].workload[0].simpoint 541 # No distance specified, just switch 542 else: 543 testsys.cpu[i].max_insts_any_thread = 1 544 545 # warmup period 546 if options.warmup_insts: 547 switch_cpus[i].max_insts_any_thread = options.warmup_insts 548 549 # simulation period 550 if options.maxinsts: 551 switch_cpus_1[i].max_insts_any_thread = options.maxinsts 552 553 # attach the checker cpu if selected 554 if options.checker: 555 switch_cpus[i].addCheckerCpu() 556 switch_cpus_1[i].addCheckerCpu() 557 558 testsys.switch_cpus = switch_cpus 559 testsys.switch_cpus_1 = switch_cpus_1 560 switch_cpu_list = [(testsys.cpu[i], switch_cpus[i]) for i in xrange(np)] 561 switch_cpu_list1 = [(switch_cpus[i], switch_cpus_1[i]) for i in xrange(np)] 562 563 # set the checkpoint in the cpu before m5.instantiate is called 564 if options.take_checkpoints != None and \ 565 (options.simpoint or options.at_instruction): 566 offset = int(options.take_checkpoints) 567 # Set an instruction break point 568 if options.simpoint: 569 for i in xrange(np): 570 if testsys.cpu[i].workload[0].simpoint == 0: 571 fatal('no simpoint for testsys.cpu[%d].workload[0]', i) 572 checkpoint_inst = int(testsys.cpu[i].workload[0].simpoint) + offset 573 testsys.cpu[i].max_insts_any_thread = checkpoint_inst 574 # used for output below 575 options.take_checkpoints = checkpoint_inst 576 else: 577 options.take_checkpoints = offset 578 # Set all test cpus with the right number of instructions 579 # for the upcoming simulation 580 for i in xrange(np): 581 testsys.cpu[i].max_insts_any_thread = offset 582 583 if options.take_simpoint_checkpoints != None: 584 simpoints, interval_length = parseSimpointAnalysisFile(options, testsys) 585 586 checkpoint_dir = None 587 if options.checkpoint_restore: 588 cpt_starttick, checkpoint_dir = findCptDir(options, cptdir, testsys) 589 m5.instantiate(checkpoint_dir) 590 591 # Initialization is complete. If we're not in control of simulation 592 # (that is, if we're a slave simulator acting as a component in another 593 # 'master' simulator) then we're done here. The other simulator will 594 # call simulate() directly. --initialize-only is used to indicate this. 595 if options.initialize_only: 596 return 597 598 # Handle the max tick settings now that tick frequency was resolved 599 # during system instantiation 600 # NOTE: the maxtick variable here is in absolute ticks, so it must 601 # include any simulated ticks before a checkpoint 602 explicit_maxticks = 0 603 maxtick_from_abs = m5.MaxTick 604 maxtick_from_rel = m5.MaxTick 605 maxtick_from_maxtime = m5.MaxTick 606 if options.abs_max_tick: 607 maxtick_from_abs = options.abs_max_tick 608 explicit_maxticks += 1 609 if options.rel_max_tick: 610 maxtick_from_rel = options.rel_max_tick 611 if options.checkpoint_restore: 612 # NOTE: this may need to be updated if checkpoints ever store 613 # the ticks per simulated second 614 maxtick_from_rel += cpt_starttick 615 if options.at_instruction or options.simpoint: 616 warn("Relative max tick specified with --at-instruction or" \ 617 " --simpoint\n These options don't specify the " \ 618 "checkpoint start tick, so assuming\n you mean " \ 619 "absolute max tick") 620 explicit_maxticks += 1 621 if options.maxtime: 622 maxtick_from_maxtime = m5.ticks.fromSeconds(options.maxtime) 623 explicit_maxticks += 1 624 if explicit_maxticks > 1: 625 warn("Specified multiple of --abs-max-tick, --rel-max-tick, --maxtime."\ 626 " Using least") 627 maxtick = min([maxtick_from_abs, maxtick_from_rel, maxtick_from_maxtime]) 628 629 if options.checkpoint_restore != None and maxtick < cpt_starttick: 630 fatal("Bad maxtick (%d) specified: " \ 631 "Checkpoint starts starts from tick: %d", maxtick, cpt_starttick) 632 633 if options.standard_switch or cpu_class: 634 if options.standard_switch: 635 print "Switch at instruction count:%s" % \ 636 str(testsys.cpu[0].max_insts_any_thread) 637 exit_event = m5.simulate() 638 elif cpu_class and options.fast_forward: 639 print "Switch at instruction count:%s" % \ 640 str(testsys.cpu[0].max_insts_any_thread) 641 exit_event = m5.simulate() 642 else: 643 print "Switch at curTick count:%s" % str(10000) 644 exit_event = m5.simulate(10000) 645 print "Switched CPUS @ tick %s" % (m5.curTick()) 646 647 m5.switchCpus(testsys, switch_cpu_list) 648 649 if options.standard_switch: 650 print "Switch at instruction count:%d" % \ 651 (testsys.switch_cpus[0].max_insts_any_thread) 652 653 #warmup instruction count may have already been set 654 if options.warmup_insts: 655 exit_event = m5.simulate() 656 else: 657 exit_event = m5.simulate(options.standard_switch) 658 print "Switching CPUS @ tick %s" % (m5.curTick()) 659 print "Simulation ends instruction count:%d" % \ 660 (testsys.switch_cpus_1[0].max_insts_any_thread) 661 m5.switchCpus(testsys, switch_cpu_list1) 662 663 # If we're taking and restoring checkpoints, use checkpoint_dir 664 # option only for finding the checkpoints to restore from. This 665 # lets us test checkpointing by restoring from one set of 666 # checkpoints, generating a second set, and then comparing them. 667 if (options.take_checkpoints or options.take_simpoint_checkpoints) \ 668 and options.checkpoint_restore: 669 670 if m5.options.outdir: 671 cptdir = m5.options.outdir 672 else: 673 cptdir = getcwd() 674 675 if options.take_checkpoints != None : 676 # Checkpoints being taken via the command line at <when> and at 677 # subsequent periods of <period>. Checkpoint instructions 678 # received from the benchmark running are ignored and skipped in 679 # favor of command line checkpoint instructions. 680 exit_event = scriptCheckpoints(options, maxtick, cptdir) 681 682 # Take SimPoint checkpoints 683 elif options.take_simpoint_checkpoints != None: 684 takeSimpointCheckpoints(simpoints, interval_length, cptdir) 685 686 # Restore from SimPoint checkpoints 687 elif options.restore_simpoint_checkpoint != None: 688 restoreSimpointCheckpoint() 689 690 else: 691 if options.fast_forward: 692 m5.stats.reset() 693 print "**** REAL SIMULATION ****" 694 695 # If checkpoints are being taken, then the checkpoint instruction 696 # will occur in the benchmark code it self. 697 if options.repeat_switch and maxtick > options.repeat_switch: 698 exit_event = repeatSwitch(testsys, repeat_switch_cpu_list, 699 maxtick, options.repeat_switch) 700 else: 701 exit_event = benchCheckpoints(options, maxtick, cptdir) 702 703 print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause()) 704 if options.checkpoint_at_end: 705 m5.checkpoint(joinpath(cptdir, "cpt.%d")) 706 707 if not m5.options.interactive: 708 sys.exit(exit_event.getCode()) 709