Struct BpfEvent

pub struct BpfEvent {
    pub record_id: Option<RecordId>,
    pub ty: Type,
    pub id: u32,
    pub tag: [u8; 8],
    pub flags: u16,
}

BPF event.

Examples

Running this example may require root privileges.

use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::mpsc::channel;
use std::thread;

use perf_event_open::config::{Cpu, Opts, Proc, WakeUpOn};
use perf_event_open::count::Counter;
use perf_event_open::event::sw::Software;

static WAIT: AtomicBool = AtomicBool::new(true);

let (tid_tx, tid_rx) = channel();
thread::spawn(move || {
    tid_tx.send(unsafe { libc::gettid() }).unwrap();

    while WAIT.load(Ordering::Relaxed) {
        std::hint::spin_loop();
    }

    // Load a BPF program to trigger a `BpfEvent` record.
    aya::Ebpf::load_file("HelloWorld.bpf.o").unwrap();
});

let event = Software::Dummy;
let target = (Proc(tid_rx.recv().unwrap() as _), Cpu::ALL);

let mut opts = Opts::default();
opts.wake_up.on = WakeUpOn::Bytes(1);
opts.extra_record.bpf_event = true;

let counter = Counter::new(event, target, opts).unwrap();
let sampler = counter.sampler(5).unwrap();

counter.enable().unwrap();
WAIT.store(false, Ordering::Relaxed);

let mut iter = sampler.iter().into_async().unwrap();
while let Some(it) = iter.next().await {
    println!("{:-?}", it);
}

Since linux-5.1: https://github.com/torvalds/linux/commit/6ee52e2a3fe4ea35520720736e6791df1fb67106

Fields

record_id: Option<RecordId>

Record IDs.

ty: Type

BPF event type.

id: u32

BPF program ID.

tag: [u8; 8]

BPF program tag.

flags: u16

Flags.

Trait Implementations

impl Clone for BpfEvent

fn clone(&self) -> BpfEvent

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BpfEvent

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

Formats the value using the given formatter.