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54c77aa055ee41c8a4d2d500781752804cdfc339
gem5/configs/common/Options.py
David Hashe 54c77aa055 sim-se: add a faux-filesystem 
This change introduces the concept of a faux-filesystem.
The faux-filesystem creates a directory structure in m5out
(or whatever output dir the user specifies) where system calls
may be redirected.

This is useful to avoid non-determinism when reading files
with varying path names (e.g., variations from run-to-run if
the simulation is scheduled on a cluster where paths may change).

Also, this changeset allows circumventing host pseudofiles which
have information specific to the host processor (such as cache
hierarchy or processor information). Bypassing host pseudofiles
can be useful when executing runtimes in the absence of an
operating system kernel since runtimes may try to query standard
files (i.e. /proc or /sys) which are not relevant to an
application executing in syscall emulation mode.

Change-Id: I90821b3b403168b904a662fa98b85def1628621c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/12119
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2019-04-25 18:11:34 +00:00

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# Copyright (c) 2013 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
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Lisa Hsu
from __future__ import print_function
from __future__ import absolute_import
import m5
from m5.defines import buildEnv
from m5.objects import *
from .Benchmarks import *
from . import CpuConfig
from . import BPConfig
from . import HWPConfig
from . import MemConfig
from . import PlatformConfig
def _listCpuTypes(option, opt, value, parser):
CpuConfig.print_cpu_list()
sys.exit(0)
def _listBPTypes(option, opt, value, parser):
BPConfig.print_bp_list()
sys.exit(0)
def _listHWPTypes(option, opt, value, parser):
HWPConfig.print_hwp_list()
sys.exit(0)
def _listMemTypes(option, opt, value, parser):
MemConfig.print_mem_list()
sys.exit(0)
def _listPlatformTypes(option, opt, value, parser):
PlatformConfig.print_platform_list()
sys.exit(0)
# Add the very basic options that work also in the case of the no ISA
# being used, and consequently no CPUs, but rather various types of
# testers and traffic generators.
def addNoISAOptions(parser):
parser.add_option("-n", "--num-cpus", type="int", default=1)
parser.add_option("--sys-voltage", action="store", type="string",
default='1.0V',
help = """Top-level voltage for blocks running at system
power supply""")
parser.add_option("--sys-clock", action="store", type="string",
default='1GHz',
help = """Top-level clock for blocks running at system
speed""")
# Memory Options
parser.add_option("--list-mem-types",
action="callback", callback=_listMemTypes,
help="List available memory types")
parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8",
choices=MemConfig.mem_names(),
help = "type of memory to use")
parser.add_option("--mem-channels", type="int", default=1,
help = "number of memory channels")
parser.add_option("--mem-ranks", type="int", default=None,
help = "number of memory ranks per channel")
parser.add_option("--mem-size", action="store", type="string",
default="512MB",
help="Specify the physical memory size (single memory)")
parser.add_option("--memchecker", action="store_true")
# Cache Options
parser.add_option("--external-memory-system", type="string",
help="use external ports of this port_type for caches")
parser.add_option("--tlm-memory", type="string",
help="use external port for SystemC TLM cosimulation")
parser.add_option("--caches", action="store_true")
parser.add_option("--l2cache", action="store_true")
parser.add_option("--num-dirs", type="int", default=1)
parser.add_option("--num-l2caches", type="int", default=1)
parser.add_option("--num-l3caches", type="int", default=1)
parser.add_option("--l1d_size", type="string", default="64kB")
parser.add_option("--l1i_size", type="string", default="32kB")
parser.add_option("--l2_size", type="string", default="2MB")
parser.add_option("--l3_size", type="string", default="16MB")
parser.add_option("--l1d_assoc", type="int", default=2)
parser.add_option("--l1i_assoc", type="int", default=2)
parser.add_option("--l2_assoc", type="int", default=8)
parser.add_option("--l3_assoc", type="int", default=16)
parser.add_option("--cacheline_size", type="int", default=64)
# Enable Ruby
parser.add_option("--ruby", action="store_true")
# Run duration options
parser.add_option("-m", "--abs-max-tick", type="int", default=m5.MaxTick,
metavar="TICKS", help="Run to absolute simulated tick "
"specified including ticks from a restored checkpoint")
parser.add_option("--rel-max-tick", type="int", default=None,
metavar="TICKS", help="Simulate for specified number of"
" ticks relative to the simulation start tick (e.g. if "
"restoring a checkpoint)")
parser.add_option("--maxtime", type="float", default=None,
help="Run to the specified absolute simulated time in "
"seconds")
parser.add_option("-P", "--param", action="append", default=[],
help="Set a SimObject parameter relative to the root node. "
"An extended Python multi range slicing syntax can be used "
"for arrays. For example: "
"'system.cpu[0,1,3:8:2].max_insts_all_threads = 42' "
"sets max_insts_all_threads for cpus 0, 1, 3, 5 and 7 "
"Direct parameters of the root object are not accessible, "
"only parameters of its children.")
# Add common options that assume a non-NULL ISA.
def addCommonOptions(parser):
# start by adding the base options that do not assume an ISA
addNoISAOptions(parser)
# system options
parser.add_option("--list-cpu-types",
action="callback", callback=_listCpuTypes,
help="List available CPU types")
parser.add_option("--cpu-type", type="choice", default="AtomicSimpleCPU",
choices=CpuConfig.cpu_names(),
help = "type of cpu to run with")
parser.add_option("--list-bp-types",
action="callback", callback=_listBPTypes,
help="List available branch predictor types")
parser.add_option("--bp-type", type="choice", default=None,
choices=BPConfig.bp_names(),
help = """
type of branch predictor to run with
(if not set, use the default branch predictor of
the selected CPU)""")
parser.add_option("--list-hwp-types",
action="callback", callback=_listHWPTypes,
help="List available hardware prefetcher types")
parser.add_option("--l1i-hwp-type", type="choice", default=None,
choices=HWPConfig.hwp_names(),
help = """
type of hardware prefetcher to use with the L1
instruction cache.
(if not set, use the default prefetcher of
the selected cache)""")
parser.add_option("--l1d-hwp-type", type="choice", default=None,
choices=HWPConfig.hwp_names(),
help = """
type of hardware prefetcher to use with the L1
data cache.
(if not set, use the default prefetcher of
the selected cache)""")
parser.add_option("--l2-hwp-type", type="choice", default=None,
choices=HWPConfig.hwp_names(),
help = """
type of hardware prefetcher to use with the L2 cache.
(if not set, use the default prefetcher of
the selected cache)""")
parser.add_option("--checker", action="store_true");
parser.add_option("--cpu-clock", action="store", type="string",
default='2GHz',
help="Clock for blocks running at CPU speed")
parser.add_option("--smt", action="store_true", default=False,
help = """
Only used if multiple programs are specified. If true,
then the number of threads per cpu is same as the
number of programs.""")
parser.add_option("--elastic-trace-en", action="store_true",
help="""Enable capture of data dependency and instruction
fetch traces using elastic trace probe.""")
# Trace file paths input to trace probe in a capture simulation and input
# to Trace CPU in a replay simulation
parser.add_option("--inst-trace-file", action="store", type="string",
help="""Instruction fetch trace file input to
Elastic Trace probe in a capture simulation and
Trace CPU in a replay simulation""", default="")
parser.add_option("--data-trace-file", action="store", type="string",
help="""Data dependency trace file input to
Elastic Trace probe in a capture simulation and
Trace CPU in a replay simulation""", default="")
parser.add_option("-l", "--lpae", action="store_true")
parser.add_option("-V", "--virtualisation", action="store_true")
# dist-gem5 options
parser.add_option("--dist", action="store_true",
help="Parallel distributed gem5 simulation.")
parser.add_option("--dist-sync-on-pseudo-op", action="store_true",
help="Use a pseudo-op to start dist-gem5 synchronization.")
parser.add_option("--is-switch", action="store_true",
help="Select the network switch simulator process for a"\
"distributed gem5 run")
parser.add_option("--dist-rank", default=0, action="store", type="int",
help="Rank of this system within the dist gem5 run.")
parser.add_option("--dist-size", default=0, action="store", type="int",
help="Number of gem5 processes within the dist gem5 run.")
parser.add_option("--dist-server-name",
default="127.0.0.1",
action="store", type="string",
help="Name of the message server host\nDEFAULT: localhost")
parser.add_option("--dist-server-port",
default=2200,
action="store", type="int",
help="Message server listen port\nDEFAULT: 2200")
parser.add_option("--dist-sync-repeat",
default="0us",
action="store", type="string",
help="Repeat interval for synchronisation barriers among dist-gem5 processes\nDEFAULT: --ethernet-linkdelay")
parser.add_option("--dist-sync-start",
default="5200000000000t",
action="store", type="string",
help="Time to schedule the first dist synchronisation barrier\nDEFAULT:5200000000000t")
parser.add_option("--ethernet-linkspeed", default="10Gbps",
action="store", type="string",
help="Link speed in bps\nDEFAULT: 10Gbps")
parser.add_option("--ethernet-linkdelay", default="10us",
action="store", type="string",
help="Link delay in seconds\nDEFAULT: 10us")
# Run duration options
parser.add_option("-I", "--maxinsts", action="store", type="int",
default=None, help="""Total number of instructions to
simulate (default: run forever)""")
parser.add_option("--work-item-id", action="store", type="int",
help="the specific work id for exit & checkpointing")
parser.add_option("--num-work-ids", action="store", type="int",
help="Number of distinct work item types")
parser.add_option("--work-begin-cpu-id-exit", action="store", type="int",
help="exit when work starts on the specified cpu")
parser.add_option("--work-end-exit-count", action="store", type="int",
help="exit at specified work end count")
parser.add_option("--work-begin-exit-count", action="store", type="int",
help="exit at specified work begin count")
parser.add_option("--init-param", action="store", type="int", default=0,
help="""Parameter available in simulation with m5
initparam""")
parser.add_option("--initialize-only", action="store_true", default=False,
help="""Exit after initialization. Do not simulate time.
Useful when gem5 is run as a library.""")
# Simpoint options
parser.add_option("--simpoint-profile", action="store_true",
help="Enable basic block profiling for SimPoints")
parser.add_option("--simpoint-interval", type="int", default=10000000,
help="SimPoint interval in num of instructions")
parser.add_option("--take-simpoint-checkpoints", action="store", type="string",
help="<simpoint file,weight file,interval-length,warmup-length>")
parser.add_option("--restore-simpoint-checkpoint", action="store_true",
help="restore from a simpoint checkpoint taken with " +
"--take-simpoint-checkpoints")
# Checkpointing options
###Note that performing checkpointing via python script files will override
###checkpoint instructions built into binaries.
parser.add_option("--take-checkpoints", action="store", type="string",
help="<M,N> take checkpoints at tick M and every N ticks thereafter")
parser.add_option("--max-checkpoints", action="store", type="int",
help="the maximum number of checkpoints to drop", default=5)
parser.add_option("--checkpoint-dir", action="store", type="string",
help="Place all checkpoints in this absolute directory")
parser.add_option("-r", "--checkpoint-restore", action="store", type="int",
help="restore from checkpoint <N>")
parser.add_option("--checkpoint-at-end", action="store_true",
help="take a checkpoint at end of run")
parser.add_option("--work-begin-checkpoint-count", action="store", type="int",
help="checkpoint at specified work begin count")
parser.add_option("--work-end-checkpoint-count", action="store", type="int",
help="checkpoint at specified work end count")
parser.add_option("--work-cpus-checkpoint-count", action="store", type="int",
help="checkpoint and exit when active cpu count is reached")
parser.add_option("--restore-with-cpu", action="store", type="choice",
default="AtomicSimpleCPU", choices=CpuConfig.cpu_names(),
help = "cpu type for restoring from a checkpoint")
# CPU Switching - default switch model goes from a checkpoint
# to a timing simple CPU with caches to warm up, then to detailed CPU for
# data measurement
parser.add_option("--repeat-switch", action="store", type="int",
default=None,
help="switch back and forth between CPUs with period <N>")
parser.add_option("-s", "--standard-switch", action="store", type="int",
default=None,
help="switch from timing to Detailed CPU after warmup period of <N>")
parser.add_option("-p", "--prog-interval", type="str",
help="CPU Progress Interval")
# Fastforwarding and simpoint related materials
parser.add_option("-W", "--warmup-insts", action="store", type="int",
default=None,
help="Warmup period in total instructions (requires --standard-switch)")
parser.add_option("--bench", action="store", type="string", default=None,
help="base names for --take-checkpoint and --checkpoint-restore")
parser.add_option("-F", "--fast-forward", action="store", type="string",
default=None,
help="Number of instructions to fast forward before switching")
parser.add_option("-S", "--simpoint", action="store_true", default=False,
help="""Use workload simpoints as an instruction offset for
--checkpoint-restore or --take-checkpoint.""")
parser.add_option("--at-instruction", action="store_true", default=False,
help="""Treat value of --checkpoint-restore or --take-checkpoint as a
number of instructions.""")
parser.add_option("--spec-input", default="ref", type="choice",
choices=["ref", "test", "train", "smred", "mdred",
"lgred"],
help="Input set size for SPEC CPU2000 benchmarks.")
parser.add_option("--arm-iset", default="arm", type="choice",
choices=["arm", "thumb", "aarch64"],
help="ARM instruction set.")
def addSEOptions(parser):
# Benchmark options
parser.add_option("-c", "--cmd", default="",
help="The binary to run in syscall emulation mode.")
parser.add_option("-o", "--options", default="",
help="""The options to pass to the binary, use " "
around the entire string""")
parser.add_option("-e", "--env", default="",
help="Initialize workload environment from text file.")
parser.add_option("-i", "--input", default="",
help="Read stdin from a file.")
parser.add_option("--output", default="",
help="Redirect stdout to a file.")
parser.add_option("--errout", default="",
help="Redirect stderr to a file.")
parser.add_option("--chroot", action="store", type="string", default="/",
help="The chroot option allows a user to alter the " \
"search path for processes running in SE mode. " \
"Normally, the search path would begin at the " \
"root of the filesystem (i.e. /). With chroot, " \
"a user can force the process to begin looking at" \
"some other location (i.e. /home/user/rand_dir)." \
"The intended use is to trick sophisticated " \
"software which queries the __HOST__ filesystem " \
"for information or functionality. Instead of " \
"finding files on the __HOST__ filesystem, the " \
"process will find the user's replacment files.")
def addFSOptions(parser):
from .FSConfig import os_types
# Simulation options
parser.add_option("--timesync", action="store_true",
help="Prevent simulated time from getting ahead of real time")
# System options
parser.add_option("--kernel", action="store", type="string")
parser.add_option("--os-type", action="store", type="choice",
choices=os_types[str(buildEnv['TARGET_ISA'])],
default="linux",
help="Specifies type of OS to boot")
parser.add_option("--script", action="store", type="string")
parser.add_option("--frame-capture", action="store_true",
help="Stores changed frame buffers from the VNC server to compressed "\
"files in the gem5 output directory")
if buildEnv['TARGET_ISA'] == "arm":
parser.add_option("--bare-metal", action="store_true",
help="Provide the raw system without the linux specific bits")
parser.add_option("--list-machine-types",
action="callback", callback=_listPlatformTypes,
help="List available platform types")
parser.add_option("--machine-type", action="store", type="choice",
choices=PlatformConfig.platform_names(),
default="VExpress_EMM")
parser.add_option("--dtb-filename", action="store", type="string",
help="Specifies device tree blob file to use with device-tree-"\
"enabled kernels")
parser.add_option("--enable-security-extensions", action="store_true",
help="Turn on the ARM Security Extensions")
parser.add_option("--enable-context-switch-stats-dump", \
action="store_true", help="Enable stats dump at context "\
"switches and dump tasks file (required for Streamline)")
# Benchmark options
parser.add_option("--dual", action="store_true",
help="Simulate two systems attached with an ethernet link")
parser.add_option("-b", "--benchmark", action="store", type="string",
dest="benchmark",
help="Specify the benchmark to run. Available benchmarks: %s"\
% DefinedBenchmarks)
# Metafile options
parser.add_option("--etherdump", action="store", type="string", dest="etherdump",
help="Specify the filename to dump a pcap capture of the" \
"ethernet traffic")
# Disk Image Options
parser.add_option("--disk-image", action="store", type="string", default=None,
help="Path to the disk image to use.")
parser.add_option("--root-device", action="store", type="string", default=None,
help="OS device name for root partition")
# Command line options
parser.add_option("--command-line", action="store", type="string",
default=None,
help="Template for the kernel command line.")
parser.add_option("--command-line-file", action="store",
default=None, type="string",
help="File with a template for the kernel command line")
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