From c347afc761d4de170536f6795396141ce4367227 Mon Sep 17 00:00:00 2001 From: Matheus Date: Sat, 19 Sep 2026 12:50:00 -0300 Subject: [PATCH] sched: if last cpu is idle, run on it --- kernel-src/sys/topology.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/kernel-src/sys/topology.c b/kernel-src/sys/topology.c index 8ac7a8d3..ccc8135f 100644 --- a/kernel-src/sys/topology.c +++ b/kernel-src/sys/topology.c @@ -90,6 +90,12 @@ cpu_t *topology_find_next_cpu_to_run(topology_node_t *last_cpu, thread_t *thread if (sleep_time <= SCHED_SLEEP_TIME_LIMIT_CPU_US && sched_thread_can_run_in_cpu(thread, last_cpu->cpu->last_queue, last_cpu->cpu->last_interactivity)) return last_cpu->cpu; + spinlock_acquire(&sched_idle_cpu_bitmap_lock); + bool last_cpu_idle = bitmap_get(&sched_idle_cpu_bitmap, last_cpu->cpu->internal_id); + spinlock_release(&sched_idle_cpu_bitmap_lock); + if (last_cpu_idle) + return last_cpu->cpu; + cpu_t *cpu = search_internal_recursive_up(last_cpu->parent, last_cpu, thread, sleep_time, 2); return cpu;