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scx_rustland_core: consume from the shared DSQ before local DSQ

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The shared DSQ is typically used to prioritize tasks and dispatch them
on the first CPU available, so consume from the shared DSQ before the
local CPU DSQ.

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
This commit is contained in:
Andrea Righi 2024-05-21 16:54:51 +02:00
parent 6901ddb150
commit 778ee1406f
1 changed files with 6 additions and 6 deletions
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12
rust/scx_rustland_core/assets/bpf/main.bpf.c
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@ -662,17 +662,17 @@ void BPF_STRUCT_OPS(rustland_dispatch, s32 cpu, struct task_struct *prev)
*/ */
bpf_user_ringbuf_drain(&dispatched, handle_dispatched_task, NULL, 0); bpf_user_ringbuf_drain(&dispatched, handle_dispatched_task, NULL, 0);
/* Consume all tasks enqueued in the current CPU's DSQ first */
bpf_repeat(MAX_ENQUEUED_TASKS) {
if (!scx_bpf_consume(cpu_to_dsq(cpu)))
break;
}
/* Consume all tasks enqueued in the shared DSQ */ /* Consume all tasks enqueued in the shared DSQ */
bpf_repeat(MAX_ENQUEUED_TASKS) { bpf_repeat(MAX_ENQUEUED_TASKS) {
if (!scx_bpf_consume(SHARED_DSQ)) if (!scx_bpf_consume(SHARED_DSQ))
break; break;
} }
/* Consume all tasks enqueued in the current CPU's DSQ first */
bpf_repeat(MAX_ENQUEUED_TASKS) {
if (!scx_bpf_consume(cpu_to_dsq(cpu)))
break;
}
} }
/* /*