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LoopPoint is a multithreaded workload sampling method that targets PCs and PC execution counts. The main idea for LoopPoint is to base the beginning and end of the simjulation sample on the number of times a particular loop (PC) has been executed globally across all threads in a region that partitioned with a set length of instruction counts. This in some senses generalizes SimPoint which use the instruction count of a single thread. The link to the paper: https://ieeexplore.ieee.org/document/9773236 The LoopPointCheckpoint is designed to take in LoopPoint data file and generate the information needed to take checkpoints for LoopPoint regions(warmup regions+simulation region) The LoopPointRestore is designed to take in the LoopPOint data file and generate information needed to to restore a checkpoint taken by the LoopPOintCheckpoint. The LoopPoint is the parent class for LoopPointCheckpoint and LoopPointRestore. Change-Id: I595b0ff9d350c7c496639748a9c63ecc61fbaec9 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67195 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
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, 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 these tools. Once you have all dependencies resolved, type 'scons build/<CONFIG>/gem5.opt' where CONFIG is one of the options in build_opts like ARM, NULL, MIPS, POWER, SPARC, X86, Garnet_standalone, etc. This will build an optimized version of the gem5 binary (gem5.opt) with the the specified configuration. See http://www.gem5.org/documentation/general_docs/building for more details and options. The main source tree includes these subdirectories: - build_opts: pre-made default configurations for gem5 - build_tools: tools used internally by gem5's build process. - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - include: include files for use in other programs - site_scons: modular components of the build system - 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 may need compiled system firmware, kernel binaries and one or more disk images, depending on gem5's configuration and what type of workload you're trying to run. Many of those resources can be downloaded from http://resources.gem5.org, and/or from the git repository here: https://gem5.googlesource.com/public/gem5-resources/ If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.