Struct PerCore 

pub struct PerCore {
    pub run_queue: SpinLock<VecDeque<Box<Thread>>>,
    pub remain: AtomicIsize,
}

Per-core scheduler state.

The PerCore struct represents the per-core scheduling state in a multi-core system. Each CPU core maintains its own scheduling queue to manage runnable threads independently. This structure is used within the RoundRobin scheduler to ensure that each core schedules and executes threads in a fair and efficient manner.

Fields

run_queue: SpinLock<VecDeque<Box<Thread>>>

Queue of threads ready to run on this CPU core.

• Protected by a SpinLock to prevent concurrent access issues.
• Threads are stored in a [VecDeque] to allow efficient push/pop operations.

remain: AtomicIsize

Remaining time slice for the currently running thread.

• Uses AtomicIsize for safe atomic updates across multiple CPU cores.
• Typically decremented on each timer interrupt, triggering a context switch when it reaches zero.
• You can use [``] for load, store to this variable.