Module stats 

Stats server, #[derive(Stats)] metrics and monitor loop.

Metrics corresponds to the BPF-side struct mlfq_stats: the type is defined in src/bpf/intf.h and the volatile instance lives in src/bpf/main.bpf.c, plus a userspace uptime gauge. Field names match the BPF struct 1:1. The top stats op reports deltas over the poll interval.

Re-exports

use std::io::Write; 🔒

use std::sync::Arc; 🔒

use std::sync::atomic::AtomicBool; 🔒

use std::sync::atomic::Ordering; 🔒

use std::time::Duration; 🔒

use anyhow::Result; 🔒

use scx_stats_derive::Stats; 🔒

use scx_stats_derive::stat_doc; 🔒

use serde::Deserialize; 🔒

use serde::Deserialize; 🔒

use serde::Serialize; 🔒

use serde::Serialize; 🔒

use scx_stats::prelude::*; 🔒

Structs

Metrics

PerCpuMetrics

One entry of the web UI’s per-CPU card grid.

WebMetrics

Snapshot served by the web UI’s /api/stats endpoint.

Constants

OP_LAT_EDGES_US 🔒

Bucket edges of the op-latency histogram, matching enum mlfq_op_lat_consts in src/bpf/intf.h, in microseconds.

Functions

fmt_op_lat 🔒

Format one op’s eight bucket counts with their microsecond edges as “low-high=count” pairs. A histogram shorter than eight buckets (the untracked default) formats as “n/a”.

monitor

The monitor loop. It periodically polls the stats server and prints a one-line summary. It runs in its own thread (see main.rs) and exits on shutdown.

server_data

The stats server definition. A single top op reporting interval deltas.