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PerCpu

strat9_kernel::arch::x86_64::percpu

Struct PerCpu 

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#[repr(C)]
pub struct PerCpu {
    pub arch: PerCpuArch,
    present: AtomicBool,
    online: AtomicBool,
    apic_id: AtomicU32,
    kernel_stack_top: AtomicU64,
    tlb_ready: AtomicBool,
    pub preempt_count: AtomicU32,
    pub signal_pending: AtomicU32,
}
Expand description

Per-CPU state.

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§arch: PerCpuArch§present: AtomicBool§online: AtomicBool§apic_id: AtomicU32§kernel_stack_top: AtomicU64§tlb_ready: AtomicBool§preempt_count: AtomicU32

Preemption-disable depth counter. When > 0, maybe_preempt() and yield_task() are no-ops on this CPU.

§signal_pending: AtomicU32

Fast signal-pending hint for the current CPU.

Set by send_signal when a signal targets the task currently running on this CPU. Checked by the syscall dispatcher to avoid the expensive current_task_clone() + scheduler lock when no signal is pending.

AtomicU32 (not AtomicBool) for better cache-line performance.

NOTE TODO : the extra bits are reserved for future fast-pending flags.

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impl PerCpu

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pub const fn new() -> Self

Creates a new instance.

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pub fn apic_id(&self) -> u32

Performs the apic id operation.

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pub fn online(&self) -> bool

Performs the online operation.

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