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TreeFeats

scx_mlfq::mlfq_tree

Struct TreeFeats 

Source 
#[repr(C)]
pub struct TreeFeats {
    pub prev_burst_ns: u64,
    pub sleep_ns: u64,
    pub ema: u64,
    pub io_wait: u32,
    pub wake_cnt: u32,
    pub wake_lat_us: u32,
    pub queue_wait_us: u32,
    pub sq_ema: u64,
    pub sleep_var_ratio: u32,
    pub pad: u32,
    pub gpu_submit: u32,
    pub pad2: u32,
}
Expand description

Per-task feature vector, the mirror of struct mlfq_tree_feats.

Field order is part of the shared ABI with the BPF sample struct and the emitted mlfq_tree_sample layout. prev_burst_ns, sleep_ns, ema, io_wait, wake_cnt, then the measured service fields (wake_lat_us, queue_wait_us, sq_ema), the cadence feature (sleep_var_ratio) and the gpu feature (gpu_submit quant 0..4).

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§prev_burst_ns: u64

Last completed run segment, in nsecs.

§sleep_ns: u64

Sleep before the current wakeup, in nsecs.

§ema: u64

EMA interactivity gauge.

§io_wait: u32

1 if the wakeup is an I/O completion.

§wake_cnt: u32

Consecutive short-sleep wakeups.

§wake_lat_us: u32

Last wakeup-to-run latency of the task, in microseconds.

§queue_wait_us: u32

Last enqueue-to-run wait of the task, in microseconds.

§sq_ema: u64

Per-task service-quality EMA (nsecs), saturating.

§sleep_var_ratio: u32

Sleep variation ratio, FP_SHIFT fixed point (8).

§pad: u32

Pad to 64-byte alignment.

§gpu_submit: u32

GPU submissions quantised 0..4.

§pad2: u32

Pad to 64 bytes, keeps 8-byte tail alignment.

Trait Implementations§

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impl Clone for TreeFeats

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fn clone(&self) -> TreeFeats

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for TreeFeats

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impl Debug for TreeFeats

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

Formats the value using the given formatter. Read more
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impl Default for TreeFeats

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fn default() -> TreeFeats

Returns the “default value” for a type. Read more
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impl Eq for TreeFeats

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impl PartialEq for TreeFeats

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fn eq(&self, other: &TreeFeats) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for TreeFeats

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