DistributedCounter

Struct DistributedCounter 

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pub struct DistributedCounter<const BUCKETS: usize> { /* private fields */ }
Expand description

A counter that minimizes slowdowns from contenation at the cost of increased memory usage.

Modeled on the “adaptive multi-counter” described by Travis Downs. Use this counter type only if RelaxedCounter performs poorly. Then, benchmark the performance of your code with DistributedCounter with a bucket count of 1. Increase the number of buckets (up to your available parallelism) until performance is satisfactory.

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impl<const BUCKETS: usize> Counter for DistributedCounter<BUCKETS>

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const ZERO: Self

A fresh instance of this counter holding the value of 0.
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type Primitive = isize

The primitive type underlying this counter.
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fn add_assign(&self, n: isize)

Eventually increase the value of this counter by n.
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fn sub_assign(&self, n: isize)

Eventually decrease the value of this counter by n.
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fn fetch(&self) -> isize

Eventually retrieve the value of this counter.

Auto Trait Implementations§

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impl<const BUCKETS: usize> !Freeze for DistributedCounter<BUCKETS>

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impl<const BUCKETS: usize> RefUnwindSafe for DistributedCounter<BUCKETS>

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impl<const BUCKETS: usize> Send for DistributedCounter<BUCKETS>

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impl<const BUCKETS: usize> Sync for DistributedCounter<BUCKETS>

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impl<const BUCKETS: usize> Unpin for DistributedCounter<BUCKETS>

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impl<const BUCKETS: usize> UnwindSafe for DistributedCounter<BUCKETS>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.