scx_layered::stats

Struct LayerStats

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pub struct LayerStats {
Show 48 fields
    pub index: usize,
    pub util: f64,
    pub util_protected_frac: f64,
    pub util_protected_preempt_frac: f64,
    pub util_open_frac: f64,
    pub util_frac: f64,
    pub tasks: u32,
    pub total: u64,
    pub sel_local: f64,
    pub enq_local: f64,
    pub enq_wakeup: f64,
    pub enq_expire: f64,
    pub enq_reenq: f64,
    pub min_exec: f64,
    pub min_exec_us: u64,
    pub open_idle: f64,
    pub preempt: f64,
    pub preempt_xllc: f64,
    pub preempt_xnuma: f64,
    pub preempt_first: f64,
    pub preempt_idle: f64,
    pub preempt_fail: f64,
    pub affn_viol: f64,
    pub keep: f64,
    pub keep_fail_max_exec: f64,
    pub keep_fail_busy: f64,
    pub is_excl: u32,
    pub excl_collision: f64,
    pub excl_preempt: f64,
    pub yielded: f64,
    pub yield_ignore: u64,
    pub migration: f64,
    pub xnuma_migration: f64,
    pub xllc_migration: f64,
    pub xllc_migration_skip: f64,
    pub xlayer_wake: f64,
    pub xlayer_rewake: f64,
    pub llc_drain_try: f64,
    pub llc_drain: f64,
    pub skip_remote_node: f64,
    pub cpus: Vec<u64>,
    pub cur_nr_cpus: u32,
    pub min_nr_cpus: u32,
    pub max_nr_cpus: u32,
    pub nr_llc_cpus: Vec<u32>,
    pub slice_us: u64,
    pub llc_fracs: Vec<f64>,
    pub llc_lats: Vec<f64>,

}

Fields§

§index: usize

index

§util: f64

Total CPU utilization (100% means one full CPU)

§util_protected_frac: f64

Protected CPU utilization %

§util_protected_preempt_frac: f64

Preempt-protected CPU utilization %

§util_open_frac: f64

Open CPU utilization %

§util_frac: f64

fraction of total CPU utilization

§tasks: u32

number of tasks

§total: u64

count of sched events during the period

§sel_local: f64

% dispatched into idle CPU from select_cpu

§enq_local: f64

% dispatched into idle CPU from enqueue

§enq_wakeup: f64

% enqueued after wakeup

§enq_expire: f64

% enqueued after slice expiration

§enq_reenq: f64

% re-enqueued due to RT preemption

§min_exec: f64

count of times exec duration < min_exec_us

§min_exec_us: u64

total exec durations extended due to min_exec_us

§open_idle: f64

% dispatched into idle CPUs occupied by other layers

§preempt: f64

% preempted other tasks

§preempt_xllc: f64

% preempted XLLC tasks

§preempt_xnuma: f64

% preempted XNUMA tasks

§preempt_first: f64

% first-preempted other tasks

§preempt_idle: f64

% idle-preempted other tasks

§preempt_fail: f64

% attempted to preempt other tasks but failed

§affn_viol: f64

% violated config due to CPU affinity

§keep: f64

% continued executing after slice expiration

§keep_fail_max_exec: f64

% disallowed to continue executing due to max_exec

§keep_fail_busy: f64

% disallowed to continue executing due to other tasks

§is_excl: u32

whether is exclusive

§excl_collision: f64

count of times an excl task skipped a CPU as the sibling was also excl

§excl_preempt: f64

% a sibling CPU was preempted for an exclusive task

§yielded: f64

% yielded

§yield_ignore: u64

count of times yield was ignored

§migration: f64

% migrated across CPUs

§xnuma_migration: f64

% migrated across NUMA nodes

§xllc_migration: f64

% migrated across LLCs

§xllc_migration_skip: f64

% migration skipped across LLCs due to xllc_mig_min_us

§xlayer_wake: f64

% wakers across layers

§xlayer_rewake: f64

% rewakers across layers where waker has waken the task previously

§llc_drain_try: f64

% LLC draining tried

§llc_drain: f64

% LLC draining succeeded

§skip_remote_node: f64

% skip LLC dispatch on remote node

§cpus: Vec<u64>

mask of allocated CPUs

§cur_nr_cpus: u32

count of CPUs assigned

§min_nr_cpus: u32

minimum # of CPUs assigned

§max_nr_cpus: u32

maximum # of CPUs assigned

§nr_llc_cpus: Vec<u32>

count of CPUs assigned per LLC

§slice_us: u64

slice duration config

§llc_fracs: Vec<f64>

Per-LLC scheduling event fractions

§llc_lats: Vec<f64>

Per-LLC average latency

Implementations§

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impl LayerStats

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pub fn new( lidx: usize, layer: &Layer, stats: &Stats, bstats: &BpfStats, nr_cpus_range: (usize, usize), ) -> Self

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pub fn format<W: Write>( &self, w: &mut W, name: &str, header_width: usize, ) -> Result<()>

Trait Implementations§

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impl Clone for LayerStats

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fn clone(&self) -> LayerStats

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for LayerStats

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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 LayerStats

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fn default() -> LayerStats

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for LayerStats

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Meta for LayerStats

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fn meta() -> StatsMeta

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impl Serialize for LayerStats

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

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