Augustin Cavalier a08764fd75 kernel/scheduler: Avoid packing IRQs if it's not going to change much.
If we've gotten to pack_irqs, it means the current CPU is idle,
so it's not totally overloaded. We then check whether the "small
task" core is less loaded than us, or whether it has a significant
load difference from us, and bail if it doesn't.

This avoids thousands of unnecessary IRQ reassignments when
using power saving mode.

Follows up #18588.
(cherry picked from commit 5ba228dfc6fbf87de734d3f08369c824bd4553a3)

Change-Id: Idc914023911f374ec70a87e13437ce388bcdbd8a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/11520
Reviewed-by: waddlesplash <[email protected]>
2026-08-11 21:15:55 +00:00
2026-08-07 01:27:36 +00:00
2018-01-04 00:04:02 -06:00
2026-06-05 10:52:04 +00:00

Haiku

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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.

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