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Andrea Righi 6d2aac1591 scx_rustland_core: introduce dispatch flags 
Reserve some bits of the `cpu` attribute of a task to store special
dispatch flags.

Initially, let's introduce just RL_CPU_ANY to replace the special value
NO_CPU, indicating that the task can be dispatched on any CPU,
specifically the first CPU that becomes available.

This allows to keep the CPU value assigned by the builtin idle selection
logic, that can potentially be used later for further optimizations.

Moreover, having the possibility to specify dispatch flags gives more
flexibility and it allows to map new scheduling features to such flags.

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
2024-04-23 07:13:30 +02:00
..
c simple: Invoke __COMPAT_scx_bpf_switch_all(); 2024-04-16 11:09:44 -05:00
include rusty: Support restarting rusty on hotplug events 2024-04-04 14:52:48 -05:00
rust scx_rustland_core: introduce dispatch flags 2024-04-23 07:13:30 +02:00
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

README.md

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