Struct redbpf::PerCpuArray

pub struct PerCpuArray<'a, T: Clone> { /* fields omitted */ }

Per-cpu array map corresponding to BPF_MAP_TYPE_PERCPU_ARRAY

Example

use redbpf::{load::Loader, PerCpuArray, PerCpuValues};
let loaded = Loader::load(b"biolatpcts.elf").expect("error loading BPF program");
let biolat = PerCpuArray::<u64>::new(loaded.map("biolat").expect("arr not found")).expect("error creating Array in userspace");
let mut values = PerCpuValues::new(0);
values[0] = 1;
values[1] = 10;
biolat.set(0, &values);

This structure is used by userspace programs. For BPF program’s API, see redbpf_probes::maps::PerCpuArray

Implementations

impl<'base, T: Clone> PerCpuArray<'base, T>

pub fn new(base: &Map) -> Result<PerCpuArray<'_, T>>

pub fn set(&self, index: u32, values: &PerCpuValues<T>) -> Result<()>

Set per-cpu values to the BPF map

The number of elements in values should be equal to the number of possible CPUs. It is guranteed if values is created by PerCpuValues::new

This method can fail if index is out of bound of array map.

pub fn get(&self, index: u32) -> Option<PerCpuValues<T>>

Get per-cpu values from the BPF map

Get per-cpu values at index. This method returns PerCpuValues

This method can return None if index is out of bound.

pub fn len(&self) -> usize

Get length of array map