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EqPerfDomain

scx_utils::energy_model

Struct EqPerfDomain 

Source 
pub struct EqPerfDomain {
    pub id: usize,
    pub perf_doms: Vec<Arc<PerfDomain>>,
    pub span: Cpumask,
    pub perf_table: BTreeMap<usize, Arc<PerfState>>,
}
Expand description

A set of performance domains sharing an identical performance table.

How many CPUs a performance domain covers is processor-specific: it can be a cluster, a core, or a single CPU. Intel hybrid processors, for instance, have one performance domain per CPU, so all the P-cores (or all the E-cores) are represented by separate performance domains even though they are identical. Such domains are interchangeable, so a search for the cheapest set of CPUs can consider how many CPUs to take from an equivalence performance domain rather than which performance domains to activate, reducing the search space from 2^nr_perf_doms to prod(weight_i + 1).

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§id: usize

Monotonically increasing unique id.

§perf_doms: Vec<Arc<PerfDomain>>

Member performance domains in ascending domain id order.

§span: Cpumask

Cpumask of all CPUs in this equivalence performance domain.

§perf_table: BTreeMap<usize, Arc<PerfState>>

Table of performance states indexed by performance, shared by all member performance domains.

Trait Implementations§

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impl Clone for EqPerfDomain

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fn clone(&self) -> EqPerfDomain

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 Debug for EqPerfDomain

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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 Display for EqPerfDomain

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

Formats the value using the given formatter. Read more

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