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Moving PCEvents scheduling from the system to the Thread [1] requires us to forward PCEvents to the CheckerCPU thread. We will otherwise encounter a divergence with the checker when trying to emulate a SkipFunction in the host (e.g. udelay on Arm). While the original thread will correctly emulate it and jump to the next instruction in the binary), the Checker's thread, with no scheduled PCEvent, will jump straight into the function. This is fixing realview64-o3-checker.py regression JIRA: https://gem5.atlassian.net/browse/GEM5-364 [1]: https://gem5-review.googlesource.com/c/public/gem5/+/22106 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Change-Id: I8543535eac3adc366e976b1c0999aafaeca6b141 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/46625 Reviewed-by: Richard Cooper <richard.cooper@arm.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@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/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. 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/documentation/general_docs/building 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 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/documentation/general_docs/building for more details and options. 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. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.