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568e292a24
The current API used to notify the user-space scheduler when a task exits is really confusing (setting a negative value in queued_task_ctx.cpu), and it's also possible to detect task exiting events from user-space (or check in procfs, even if it's slower). In any case, a better API should be provided for this, so drop the current one for now. NOTE: this will cause additional memory usage for scx_rustland, but it can be fixed/addressed later in a separate commit (i.e., providing a periodic garbage collector for the unused task entries). Signed-off-by: Andrea Righi <andrea.righi@linux.dev> |
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scx_rlfifo
This is a single user-defined scheduler used within sched_ext, which is a Linux kernel feature which enables implementing kernel thread schedulers in BPF and dynamically loading them. Read more about sched_ext.
Overview
scx_rlfifo is a simple FIFO scheduler runs in user-space, based on the scx_rustland_core framework.
Typical Use Case
This scheduler is provided as a simple template that can be used as a baseline to test more complex scheduling policies.
Production Ready?
Definitely not. Using this scheduler in a production environment is not recommended, unless there are specific requirements that necessitate a basic FIFO scheduling approach. Even then, it's still recommended to use the kernel's SCHED_FIFO real-time class.