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We have seen cases where the primary CPU was not able to bootstrap the secondary CPUs in multicore tests (dual). The Linux booting process "quietly" gives up (no panic) and it completes the booting without bringing up the seondary CPU(s). This makes the dual test useless as it is supposed to test SMP setups. By adding a MatchFileRegex verifier, we make sure we are able to catch these cases, correctly raising an error if not all CPUs are available. We do this by inspecting the kernel log for the following print: "CPU1: Booted secondary processor" There are probably more resilient alternatives to a regex based check, but those require a less minimal rootfs (the current m5_exit.squashfs.arm64 FS has a single /sbin/init binary executing a simple m5 exit operation) Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Change-Id: I37e0882967443449d5fedfe3963bd25528a030f8 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/44446 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.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.