ethercat-linux/vendor/ethercrab/benches/frame.rs
Tony Cao 21b2d3bf99 J1900 <-> TwinCAT 1 kHz verification over EL6695 bridge
Re-implementation of rustbootd's ecat_el6695_* examples as a single binary
with fixes found in review and on hardware:

- DC-follow PLL hardened against period-2 hunting: slew-limited anchor
  (+/-50us/cycle), bistable-trap snap re-anchor, re-prime on stale deadline
- drift-free absolute-grid ticker mode; probe mode for timestamp forensics
- bounded-memory online stats (histograms), graceful SIGINT/SIGTERM shutdown
  with full report, error-streak abort
- timestamp plausibility filter comparing against the previous raw sample
  (avoids the deadlock after a startup outlier)
- XFC scope waveform options: --el2202 (with --el2202-dual), --el2262,
  --el1252 latch timestamp readback with per-channel edge statistics
- register access unified in regs.rs: named bit constants everywhere,
  read-modify-write for enable/activation bytes
- vendored patched ethercrab 0.7.1 (sdo_write_complete, send_raw_coe)

Verified on J1900 (PREEMPT_RT 6.6.135): 600k cycles/600s exact 1 kHz,
tx/rx zero errors, phase_err p50=164us std=5us; EL2202<->EL1252 loopback
edge interval mean 2000.24us std=24.65us.
2026-07-22 08:55:41 +08:00

30 lines
971 B
Rust

use criterion::{Criterion, criterion_group, criterion_main};
use ethercrab::{Command, MainDevice, MainDeviceConfig, PduStorage, Timeouts};
use std::{future::poll_fn, pin::pin, task::Poll};
const DATA: [u8; 8] = [0x11u8, 0x22, 0x33, 0x44, 0xaa, 0xbb, 0xcc, 0xdd];
pub fn push_pdu(c: &mut Criterion) {
// 1 frame, up to 128 bytes payload
let storage = PduStorage::<1, { PduStorage::element_size(128) }>::new();
let (_tx, _rx, pdu_loop) = storage.try_split().unwrap();
let maindevice = MainDevice::new(pdu_loop, Timeouts::default(), MainDeviceConfig::default());
c.bench_function("frame push pdu", |b| {
b.iter(|| {
let mut f = pin!(Command::fpwr(0x5678, 0x1234).send_receive_slice(&maindevice, &DATA));
cassette::block_on(poll_fn(|ctx| {
let _ = f.as_mut().poll(ctx);
Poll::Ready(())
}));
})
});
}
criterion_group!(frame, push_pdu);
criterion_main!(frame);