fs_bigLITTLE.py revision 12153
1# Copyright (c) 2016-2017 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# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35# 36# Authors: Gabor Dozsa 37# Andreas Sandberg 38 39# This is an example configuration script for full system simulation of 40# a generic ARM bigLITTLE system. 41 42 43import argparse 44import os 45import sys 46import m5 47import m5.util 48from m5.objects import * 49 50m5.util.addToPath("../../") 51 52from common import SysPaths 53from common import CpuConfig 54from common.cores.arm import ex5_big, ex5_LITTLE 55 56import devices 57from devices import AtomicCluster, KvmCluster 58 59 60default_dtb = 'armv8_gem5_v1_big_little_2_2.dtb' 61default_kernel = 'vmlinux4.3.aarch64' 62default_disk = 'aarch64-ubuntu-trusty-headless.img' 63default_rcs = 'bootscript.rcS' 64 65default_mem_size= "2GB" 66 67def _to_ticks(value): 68 """Helper function to convert a latency from string format to Ticks""" 69 70 return m5.ticks.fromSeconds(m5.util.convert.anyToLatency(value)) 71 72def _using_pdes(root): 73 """Determine if the simulator is using multiple parallel event queues""" 74 75 for obj in root.descendants(): 76 if not m5.proxy.isproxy(obj.eventq_index) and \ 77 obj.eventq_index != root.eventq_index: 78 return True 79 80 return False 81 82 83class BigCluster(devices.CpuCluster): 84 def __init__(self, system, num_cpus, cpu_clock, 85 cpu_voltage="1.0V"): 86 cpu_config = [ CpuConfig.get("O3_ARM_v7a_3"), devices.L1I, devices.L1D, 87 devices.WalkCache, devices.L2 ] 88 super(BigCluster, self).__init__(system, num_cpus, cpu_clock, 89 cpu_voltage, *cpu_config) 90 91class LittleCluster(devices.CpuCluster): 92 def __init__(self, system, num_cpus, cpu_clock, 93 cpu_voltage="1.0V"): 94 cpu_config = [ CpuConfig.get("MinorCPU"), devices.L1I, devices.L1D, 95 devices.WalkCache, devices.L2 ] 96 super(LittleCluster, self).__init__(system, num_cpus, cpu_clock, 97 cpu_voltage, *cpu_config) 98 99class Ex5BigCluster(devices.CpuCluster): 100 def __init__(self, system, num_cpus, cpu_clock, 101 cpu_voltage="1.0V"): 102 cpu_config = [ CpuConfig.get("ex5_big"), ex5_big.L1I, ex5_big.L1D, 103 ex5_big.WalkCache, ex5_big.L2 ] 104 super(Ex5BigCluster, self).__init__(system, num_cpus, cpu_clock, 105 cpu_voltage, *cpu_config) 106 107class Ex5LittleCluster(devices.CpuCluster): 108 def __init__(self, system, num_cpus, cpu_clock, 109 cpu_voltage="1.0V"): 110 cpu_config = [ CpuConfig.get("ex5_LITTLE"), ex5_LITTLE.L1I, 111 ex5_LITTLE.L1D, ex5_LITTLE.WalkCache, ex5_LITTLE.L2 ] 112 super(Ex5LittleCluster, self).__init__(system, num_cpus, cpu_clock, 113 cpu_voltage, *cpu_config) 114 115def createSystem(caches, kernel, bootscript, disks=[]): 116 sys = devices.SimpleSystem(caches, default_mem_size, 117 kernel=SysPaths.binary(kernel), 118 readfile=bootscript) 119 120 sys.mem_ctrls = SimpleMemory(range=sys._mem_range) 121 sys.mem_ctrls.port = sys.membus.master 122 123 sys.connect() 124 125 # Attach disk images 126 if disks: 127 def cow_disk(image_file): 128 image = CowDiskImage() 129 image.child.image_file = SysPaths.disk(image_file) 130 return image 131 132 sys.disk_images = [ cow_disk(f) for f in disks ] 133 sys.pci_vio_block = [ PciVirtIO(vio=VirtIOBlock(image=img)) 134 for img in sys.disk_images ] 135 for dev in sys.pci_vio_block: 136 sys.attach_pci(dev) 137 138 sys.realview.setupBootLoader(sys.membus, sys, SysPaths.binary) 139 140 return sys 141 142cpu_types = { 143 "atomic" : (AtomicCluster, AtomicCluster), 144 "timing" : (BigCluster, LittleCluster), 145 "exynos" : (Ex5BigCluster, Ex5LittleCluster), 146} 147 148# Only add the KVM CPU if it has been compiled into gem5 149if devices.have_kvm: 150 cpu_types["kvm"] = (KvmCluster, KvmCluster) 151 152 153def addOptions(parser): 154 parser.add_argument("--restore-from", type=str, default=None, 155 help="Restore from checkpoint") 156 parser.add_argument("--dtb", type=str, default=default_dtb, 157 help="DTB file to load") 158 parser.add_argument("--kernel", type=str, default=default_kernel, 159 help="Linux kernel") 160 parser.add_argument("--disk", action="append", type=str, default=[], 161 help="Disks to instantiate") 162 parser.add_argument("--bootscript", type=str, default=default_rcs, 163 help="Linux bootscript") 164 parser.add_argument("--cpu-type", type=str, choices=cpu_types.keys(), 165 default="timing", 166 help="CPU simulation mode. Default: %(default)s") 167 parser.add_argument("--kernel-init", type=str, default="/sbin/init", 168 help="Override init") 169 parser.add_argument("--big-cpus", type=int, default=1, 170 help="Number of big CPUs to instantiate") 171 parser.add_argument("--little-cpus", type=int, default=1, 172 help="Number of little CPUs to instantiate") 173 parser.add_argument("--caches", action="store_true", default=False, 174 help="Instantiate caches") 175 parser.add_argument("--last-cache-level", type=int, default=2, 176 help="Last level of caches (e.g. 3 for L3)") 177 parser.add_argument("--big-cpu-clock", type=str, default="2GHz", 178 help="Big CPU clock frequency") 179 parser.add_argument("--little-cpu-clock", type=str, default="1GHz", 180 help="Little CPU clock frequency") 181 parser.add_argument("--sim-quantum", type=str, default="1ms", 182 help="Simulation quantum for parallel simulation. " \ 183 "Default: %(default)s") 184 return parser 185 186def build(options): 187 m5.ticks.fixGlobalFrequency() 188 189 kernel_cmd = [ 190 "earlyprintk=pl011,0x1c090000", 191 "console=ttyAMA0", 192 "lpj=19988480", 193 "norandmaps", 194 "loglevel=8", 195 "mem=%s" % default_mem_size, 196 "root=/dev/vda1", 197 "rw", 198 "init=%s" % options.kernel_init, 199 "vmalloc=768MB", 200 ] 201 202 root = Root(full_system=True) 203 204 disks = [default_disk] if len(options.disk) == 0 else options.disk 205 system = createSystem(options.caches, 206 options.kernel, 207 options.bootscript, 208 disks=disks) 209 210 root.system = system 211 system.boot_osflags = " ".join(kernel_cmd) 212 213 if options.big_cpus + options.little_cpus == 0: 214 m5.util.panic("Empty CPU clusters") 215 216 big_model, little_model = cpu_types[options.cpu_type] 217 218 all_cpus = [] 219 # big cluster 220 if options.big_cpus > 0: 221 system.bigCluster = big_model(system, options.big_cpus, 222 options.big_cpu_clock) 223 system.mem_mode = system.bigCluster.memoryMode() 224 all_cpus += system.bigCluster.cpus 225 226 # little cluster 227 if options.little_cpus > 0: 228 system.littleCluster = little_model(system, options.little_cpus, 229 options.little_cpu_clock) 230 system.mem_mode = system.littleCluster.memoryMode() 231 all_cpus += system.littleCluster.cpus 232 233 # Figure out the memory mode 234 if options.big_cpus > 0 and options.little_cpus > 0 and \ 235 system.littleCluster.memoryMode() != system.littleCluster.memoryMode(): 236 m5.util.panic("Memory mode missmatch among CPU clusters") 237 238 239 # create caches 240 system.addCaches(options.caches, options.last_cache_level) 241 if not options.caches: 242 if options.big_cpus > 0 and system.bigCluster.requireCaches(): 243 m5.util.panic("Big CPU model requires caches") 244 if options.little_cpus > 0 and system.littleCluster.requireCaches(): 245 m5.util.panic("Little CPU model requires caches") 246 247 # Create a KVM VM and do KVM-specific configuration 248 if issubclass(big_model, KvmCluster): 249 _build_kvm(system, all_cpus) 250 251 # Linux device tree 252 system.dtb_filename = SysPaths.binary(options.dtb) 253 254 return root 255 256def _build_kvm(system, cpus): 257 system.kvm_vm = KvmVM() 258 259 # Assign KVM CPUs to their own event queues / threads. This 260 # has to be done after creating caches and other child objects 261 # since these mustn't inherit the CPU event queue. 262 if len(cpus) > 1: 263 device_eq = 0 264 first_cpu_eq = 1 265 for idx, cpu in enumerate(cpus): 266 # Child objects usually inherit the parent's event 267 # queue. Override that and use the same event queue for 268 # all devices. 269 for obj in cpu.descendants(): 270 obj.eventq_index = device_eq 271 cpu.eventq_index = first_cpu_eq + idx 272 273 274 275def instantiate(options, checkpoint_dir=None): 276 # Setup the simulation quantum if we are running in PDES-mode 277 # (e.g., when using KVM) 278 root = Root.getInstance() 279 if root and _using_pdes(root): 280 m5.util.inform("Running in PDES mode with a %s simulation quantum.", 281 options.sim_quantum) 282 root.sim_quantum = _to_ticks(options.sim_quantum) 283 284 # Get and load from the chkpt or simpoint checkpoint 285 if options.restore_from: 286 if checkpoint_dir and not os.path.isabs(options.restore_from): 287 cpt = os.path.join(checkpoint_dir, options.restore_from) 288 else: 289 cpt = options.restore_from 290 291 m5.util.inform("Restoring from checkpoint %s", cpt) 292 m5.instantiate(cpt) 293 else: 294 m5.instantiate() 295 296 297def run(checkpoint_dir=m5.options.outdir): 298 # start simulation (and drop checkpoints when requested) 299 while True: 300 event = m5.simulate() 301 exit_msg = event.getCause() 302 if exit_msg == "checkpoint": 303 print "Dropping checkpoint at tick %d" % m5.curTick() 304 cpt_dir = os.path.join(checkpoint_dir, "cpt.%d" % m5.curTick()) 305 m5.checkpoint(cpt_dir) 306 print "Checkpoint done." 307 else: 308 print exit_msg, " @ ", m5.curTick() 309 break 310 311 sys.exit(event.getCode()) 312 313 314def main(): 315 parser = argparse.ArgumentParser( 316 description="Generic ARM big.LITTLE configuration") 317 addOptions(parser) 318 options = parser.parse_args() 319 root = build(options) 320 instantiate(options) 321 run() 322 323 324if __name__ == "__m5_main__": 325 main() 326