7af4c8a6a9
This lock protects a linked-list. In all cases but one, the only operation done while holding the lock is to remove a single item from the list and decrement a counter. Acquiring a mutex itself involves multiple linked-list operations protected by spinlocks, so cut out the overhead and just use a spinlock directly. In the one case where we do more than just remove an item, we hold an additional write-lock, and so we don't run any risk of causing "spinlock could not be acquired for a long time" KDLs, as in that case the threads will be waiting on the rwlock instead. Reduces lock contention in the VFS. Compiling HaikuDepot and the mime_db with -j4 (in a VM), the sys time decreased a bit (~10.1s to ~9.9s), and real time went down by more (~31s to ~29s.) "git status" performance also improved a bit, but we seem to be contending for vnode locks now in that case. |
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|---|---|---|
| 3rdparty | ||
| build | ||
| data | ||
| docs | ||
| headers | ||
| src | ||
| .editorconfig | ||
| .gitignore | ||
| .gitreview | ||
| configure | ||
| Jamfile | ||
| Jamrules | ||
| License.md | ||
| ReadMe.Compiling.md | ||
| ReadMe.md | ||
Haiku
Homepage | Mailing Lists | IRC Channels | Issue Tracker | API docs
Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
Goals
- Sensible defaults with minimal configuration required.
- Clean, clear, concise code.
- Unified desktop environment.
Trying Haiku
Haiku provides pre-built nightly images and release images. Haiku is compatible with a large variety of hardware, but in case you don't want to "take the plunge" and install Haiku on bare metal, you can install it on a virtual machine (VM) instead. If you've never used a VM before, you can follow one of the "Emulating Haiku" guides.
Compiling Haiku
See ReadMe.Compiling.
Contributing
Haiku is a meritocratic open source project with a large variety of tasks. Even if you can't write code, you can still help! Haiku needs designers, (technical) writers, translators, testers... Get involved and help out!
Contributing code
If you're submitting a patch to us, please make sure you're following the patch submitting guidelines.
If you're having trouble finding something in the source tree, you can use one of our web-based source code browsers:
- https://xref.landonf.org/ (OpenGrok, provided by Landon Fuller)
- https://git.haiku-os.org/ (git, provided by Haiku, Inc.)
Contributing documentation
The main piece of documentation that still needs work are the API docs (found
in the tree at docs/user). Just find an undocumented class, write
documentation for it, and submit a patch.
Contributing translations
See wiki:i18n.
Contributing software ports
See HaikuPorts.
Contributing to our infrastructure
See Infrastructure.