scx/scheds
Changwoo Min 95733f63ab scx_lavd: calculate time slice as a function of run queue length
The prior approach using the sum of weights gives too much penalty to
nice tasks with large nice values. With this commit, the time slice is
determined by the number of runnable tasks regardless of nice priority.
Note that the fairness will still be enforced based on tasks' nice
priorities (weights).

Signed-off-by: Changwoo Min <changwoo@igalia.com>
2024-07-12 22:45:22 +09:00
..
c Merge pull request #412 from vax-r/flatcg_delta_fetch 2024-07-05 07:39:22 -10:00
include scx/compat.bpf.h: Fix __COMPAT_scx_bpf_consume_task() and improve scx_qmap example 2024-06-17 10:11:06 -10:00
rust scx_lavd: calculate time slice as a function of run queue length 2024-07-12 22:45:22 +09:00
meson.build Restructure scheds folder names 2023-12-17 13:14:31 -08:00
README.md Restructure scheds folder names 2023-12-17 13:14:31 -08:00
sync-to-kernel.sh sync-to-kernel.sh: Sync scx_central and scx_flatcg 2024-02-23 14:21:03 -10:00

SCHED_EXT SCHEDULERS

Introduction

This directory contains the repo's schedulers.

Some of these schedulers are simply examples of different types of schedulers that can be built using sched_ext. They can be loaded and used to schedule on your system, but their primary purpose is to illustrate how various features of sched_ext can be used.

Other schedulers are actually performant, production-ready schedulers. That is, for the correct workload and with the correct tuning, they may be deployed in a production environment with acceptable or possibly even improved performance. Some of the examples could be improved to become production schedulers.

Please see the following README files for details on each of the various types of schedulers:

  • rust describes all of the schedulers with rust user space components. All of these schedulers are production ready.
  • c describes all of the schedulers with C user space components. All of these schedulers are production ready.

Note on syncing

Note that there is a sync-to-kernel.sh script in this directory. This is used to sync any changes to the specific schedulers with the Linux kernel tree. If you've made any changes to a scheduler in please use the script to synchronize with the sched_ext Linux kernel tree:

$ ./sync-to-kernel.sh /path/to/kernel/tree