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7aa67f42cb
This patch contains three fixes to max tick options handling in Options.py and Simulation.py: 1) Since the global simulator frequency isn't bound until m5.instantiate() is called, the maxtick resolution needs to happen after this call, since changes to the global frequency will cause m5.simulate() to misinterpret the maxtick value. Shuffling this also requires tweaking the checkpoint directory handling to signal the checkpoint restore tick back to run(). Fixing this completely and correctly will require storing the simulation frequency into checkpoints, which is beyond the scope of this patch. 2) The maxtick option in Options.py was defaulted to MaxTicks, so the old code would always skip over the maxtime part of the conditionals at the beginning of run(). Change the maxtick default to None, and set the maxtick local variable in run() appropriately. 3) To clarify whether max ticks settings are relative or absolute, split the maxtick option into separate options, for relative and absolute. Ensure that these two options and the maxtime option are handled appropriately to set the maxtick variable in Simulation.py. |
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src | ||
system | ||
tests | ||
util | ||
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README | ||
SConstruct |
This is the gem5 simulator. For detailed information about building the simulator and getting started please refer to: * The main website: http://www.gem5.org * Documentation wiki: http://www.gem5.org/Documentation * Doxygen generated: http://www.gem5.org/docs * Tutorials: http://www.gem5.org/Tutorials Specific pages of interest are: http://www.gem5.org/Introduction http://www.gem5.org/Build_System http://www.gem5.org/Dependencies http://www.gem5.org/Running_gem5 Short version: External tools and required versions To build gem5, you will need the following software: g++ version 4.3 or newer. Python, version 2.4 - 2.7 (we don't support Python 3.X). gem5 links in the Python interpreter, so you need the Python header files and shared library (e.g., /usr/lib/libpython2.4.so) in addition to the interpreter executable. These may or may not be installed by default. For example, on Debian/Ubuntu, you need the "python-dev" package in addition to the "python" package. If you need a newer or different Python installation but can't or don't want to upgrade the default Python on your system, see http://www.gem5.org/Using_a_non-default_Python_installation SCons, version 0.98.1 or newer. SCons is a powerful replacement for make. If you don't have administrator privileges on your machine, you can use the "scons-local" package to install scons in your m5 directory, or install SCons in your home directory using the '--prefix=' option. SWIG, version 1.3.34 or newer zlib, any recent version. For Debian/Ubuntu, you will need the "zlib-dev" or "zlib1g-dev" package to get the zlib.h header file as well as the library itself. m4, the macro processor. 4. In this directory, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ALPHA, ARM, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. If you have questions, please send mail to gem5-users@gem5.org WHAT'S INCLUDED (AND NOT) ------------------------- The basic source release includes these subdirectories: - gem5: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. Please see the gem5 download page for these items at http://www.gem5.org/Download