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In the systemc spec, process handles can be invalidated if they have no children and are terminated. The implementation is not required to do so however, and for the sake of simplicity gem5 currently does not. To quote: "When the underlying process instance terminates, if the process instance has no surviving children, an implementation may choose to invalidate any associated process handles, but it is not obliged to do so." Two tests have reference output which is affected by this (legal) difference in behavior. In one case, the test creates new processes which reuse the names of processes that have been terminated. Since gem5 doesn't invalidate the old processes, a standard mechanism is activated which renames the processes to something which is unique. The other test has this same problem, and also prints the hierarchy of processes several times during the test. In that hierarchy, the terminated tests with no live children are still present, where in the old reference output they've been removed. This change updates the reference output to match gem5's behavior. Change-Id: I363448de10080bdce01a4df92f991c67b31a2401 Reviewed-on: https://gem5-review.googlesource.com/c/14919 Reviewed-by: Matthias Jung <jungma@eit.uni-kl.de> Maintainer: Gabe Black <gabeblack@google.com>
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/Introduction, and for more information about building the simulator and getting started please see http://www.gem5.org/Documentation and http://www.gem5.org/Tutorials. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/Dependencies for more details concerning the minimum versions of the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ALPHA, ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/Build_System for more details and options. With the simulator built, have a look at http://www.gem5.org/Running_gem5 for more information on how to use gem5. The basic source release includes these subdirectories: - 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 If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.