Struct ArenaLib 

pub struct ArenaLib {
    _watcher: Daemon,
    _urcu: Option<Daemon>,
}

Live BPF arena library state. Returned by setup() and must be kept alive for as long as the scheduler instance uses the arena: dropping it stops and joins the library’s background threads.

Fields

_watcher: Daemon

_urcu: Option<Daemon>

Implementations

impl ArenaLib

const MAX_CPU_ARRSZ: usize

Maximum CPU mask size, derived from MAX_CPU_SUPPORTED.

const STATIC_ALLOC_PAGES_GRANULARITY: c_ulong = 8

Amount of pages allocated at once form the BPF map. by the static stack allocator.

fn run_prog_by_name( obj: &Object, name: &str, input: ProgramInput<'_>, ) -> Result<i32>

fn setup_arena(obj: &Object, task_size: usize, task_align: usize) -> Result<()>

Set up basic library state.

fn setup_topology_node(obj: &Object, mask: &[u64], id: usize) -> Result<()>

fn setup_topology_max_children(obj: &Object, topo: &Topology) -> Result<()>

Set the per-level maximum number of children before registering topology nodes. Each topology node at level L is allocated with topo_max_children[L] child pointer slots, so these values must be set before any arena_topology_node_init() calls. The sizes are derived from the actual host topology to keep per-node allocation as small as possible.

NOTE: rust/scx_arena/selftests/src/main.rs::setup_topology() contains equivalent logic and must be kept in sync with this function.

fn setup_topology(obj: &Object) -> Result<()>

pub fn setup( obj: &Object, task_size: usize, task_align: usize, nr_cpus: usize, ) -> Result<ArenaLib>

Set up the BPF arena library state and, when the object carries the scx_urcu doorbell, spawn the reclaim daemon. The returned ArenaLib owns the library’s background threads. @task_align: task ctx element alignment, 0 for word alignment.

pub fn start(obj: &Object) -> Result<ArenaLib>

Start the userspace services for BPF arena state initialized by the caller. The returned ArenaLib must be kept alive for as long as the BPF object uses the arena.

Use this instead of setup() when a scheduler has its own BPF-side arena initialization and does not use the generic arena topology.

Trait Implementations

impl Debug for ArenaLib

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.