Our experience has revealed the two week notice prior to creating the staging was good at focusing the minds of developers, prompting prioritization of desired features for the release, and, overall, improving the churn of patchsets reviewed through our Gerrit code-review system.
However, two weeks is, in hindsight, too short a notice for many, and resulted in a large Gerrit backlog from those wishing their features to be incorporated into gem5 In future releases, we are going to give a full month notice prior to creating the staging branch.
Furthermore, we created the staging branch on a Friday, with the goal of merging the staging branch into the master and develop branches exactly two weeks later another Friday. We found this led to long weeks of hectic changes, fatigue, and bad moral. We have also came to realize that our policy of the staging branch existing for two weeks is needlessly restrictive. Given only testing, bug fixes, and critical last-minute changes are permitted to be incorporated into the branch, we see no reason as to why the staging branch should not exist until its stability and reliability is sufficiently proven.
In future releases, the gem5 staging branch shall exist for as long as it takes for tests to run, and bugs exposed by these tests to be fixed. As development can continue on the develop branch, this longer-lived staging branch shall not interfere with other gem5 activities. In additional to the main git repository, there is a mirror on GitHub we can't currently accept pull requests on GitHub and a Mercurial mirror. Keep in mind that the mirrors are read only.
New code can only be submitted to the main git repository. If you want to download gem5 without installing Mercurial, you can get a tarball. But it will be more difficult to merge in changes when you need to update to new version. So, upon the release of v The gem5 website git repository has two branches, stable and develop.
The develop branch contains the state of the website for the upcoming gem5 release. As the stable branch may be updated at any time as long as those updates relate to the current release , stable is merged periodically into develop. As with the gem5 resources, and the main gem5 repository, a staging branch is created from the develop branch at least two weeks prior to a gem5 release.
The staging branch needs updated so that the documentation is up-to-date with the upcoming release. Of particular note, references to gem5 resources, hosted on the Google Cloud bucket should be updated. Upon a new major gem5 release, the develop branch is merged into stable. The website repo is tagged with the preceding version prior to merging the staging branch into stable. This is identical to the gem5 resources repository.
For example, if the current release is v That is a more "server" style system where there is no frame-buffer. The description has been created using the latest known-working tag in the repositories linked below, however the tables in each section list previous tags that are known to work.
To built the kernels on an x86 host you'll need ARM cross compilers and the device tree compiler. If you're running a reasonably new version of Ubuntu or Debian you can get required software through apt:.
If you can't use these pre-made compilers the next easiest way to obtain the required compilers from Linaro. Feb 18, Feb 2, View code.
This is the gem5 simulator. This will build an optimized version of the gem5 binary 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.
If you have questions, please send mail to gem5-users gem5. About This is an read-only mirror of the gem5 simulator.
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