ba54808150
The loops in topology aware mode were recently refactored to place the -per-LLC loops inside the per-layer loops. However, the layer specific checks were left in the inner loops, slowing this down unnecessarily. Pull the layer specific checks from the inner loop into the outer loop. Also changes these functions to `__weak` to ensure they don't get inlined - they're expected to be verified as global functions. Note to reviewers: this looks good to me, but I'd appreciate if you reviewed the De Morgan applications in detail. Test plan: - `cargo build --release && sudo target/release/scx_layered --run-example` on a machine with multiple LLCs. It's possible to stall it quite easily with stress-ng but I believe this is the case on main. |
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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