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scx_layered: Update comments on layer preemption

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Update comments on layer preemption to be more descriptive.

Signed-off-by: Daniel Hodges <hodges.daniel.scott@gmail.com>
This commit is contained in:
Daniel Hodges 2024-09-24 08:24:04 -07:00
parent 6b966cda0c
commit e68fccd26c
1 changed files with 3 additions and 2 deletions
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scheds/rust/scx_layered/src/bpf/main.bpf.c
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@ -763,8 +763,9 @@ void try_preempt(s32 task_cpu, struct task_struct *p, struct task_ctx *tctx,
bpf_cpumask_copy(topo_cpus, cast_mask(cachec->cpumask));
bpf_cpumask_and(topo_cpus, cast_mask(topo_cpus), layer_cpumask);
/*
* First try preempting in the local LLC
* First try preempting in the local LLC of available cpus in the layer mask
*/
bpf_for(idx, 0, cachec->nr_cpus) {
s32 preempt_cpu = bpf_cpumask_any_distribute(cast_mask(topo_cpus));
@ -781,7 +782,7 @@ void try_preempt(s32 task_cpu, struct task_struct *p, struct task_ctx *tctx,
}
/*
* Next try node local LLC
* Next try node local LLCs in the layer cpumask
*/
if (!nodec->cpumask) {
bpf_cpumask_release(attempted);