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Michael Lotz 299385f719 VMUserAddressSpace: Speed up area insertion with a hint.
The possible insertion range for B_*_ANY_ADDRESS always encompasses the
entire address space. Even though the initial starting point is now
looked up using a binary search tree, actually finding a free spot was
then still done using a linear search from there.

Store a simple insertion hint, the address directly following the
previous insertion of the same type, and use that as the next starting
point. In the common case this reduces the needed iterations to zero or
near zero.

No hint is used for B_*_BASE_ADDRESS specs as it is assumed that the
given base address already serves as such a hint.

Fixes the area creation performance part of #15995.

Change-Id: Ia8ce76eadc341b71de4cf8c34744c2459473bd06
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2842
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
2020-05-30 02:29:41 +00:00
3rdparty docker/bootstrap: ensure work volume exec, fix dependencies 2020-05-21 14:03:24 +00:00
build Documentation: add userguide in fur, id, ro and tr 2020-05-23 17:52:52 +00:00
data first_boot: Remove unused 'Locale settings'. 2020-05-25 22:26:25 +00:00
docs ufs2: Reading inodes of ufs2. 2020-05-18 12:16:32 +00:00
headers kernel/vm: Introduce and use VMAddressSpace::AreaRangeIterator. 2020-05-30 02:29:41 +00:00
src VMUserAddressSpace: Speed up area insertion with a hint. 2020-05-30 02:29:41 +00:00
.editorconfig editorconfig: Add new config file around our unique style 2017-09-26 14:22:32 -05:00
.gitignore .gitignore: Ignore .DS_Store (Mac OS X directory attribute files). 2016-06-18 18:25:40 -04:00
.gitreview gerrit: Add .gitreview config 2018-01-04 00:04:02 -06:00
configure configure & build: Add basic support for building with MSYS. 2020-05-03 13:24:26 -04:00
Jamfile Add gmp and mpfr to the regular image package set. 2020-04-19 20:21:31 -04:00
Jamrules Revert "Jamrules: Include the UserBuildConfig before processing repositories." 2019-09-15 17:33:36 +02:00
lgtm.yml Initial version of lgtm.com configuration file. 2019-09-19 04:03:09 +00:00
License.md LICENSE: Rename to License.md, and remove all licenses but the MIT. 2016-07-29 17:36:17 -04:00
ReadMe.Compiling.md Update readme.compiling 2020-02-03 13:39:46 +01:00
ReadMe.md ReadMe: Update links. 2020-02-17 14:43:59 -05:00

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:

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.