Struct PoolingAllocatorMetrics 

pub struct PoolingAllocatorMetrics { /* private fields */ }

Available on crate feature pooling-allocator only.

PoolingAllocatorMetrics provides access to runtime metrics of a pooling allocator configured with crate::InstanceAllocationStrategy::Pooling.

This is a cheap cloneable handle which can be obtained with Engine::pooling_allocator_metrics.

Implementations

impl PoolingAllocatorMetrics

pub fn core_instances(&self) -> u64

Available on crate feature runtime only.

Returns the number of core (module) instances currently allocated.

pub fn component_instances(&self) -> u64

Available on crate feature runtime only.

Returns the number of component instances currently allocated.

pub fn memories(&self) -> usize

Available on crate feature runtime only.

Returns the number of WebAssembly memories currently allocated.

pub fn tables(&self) -> usize

Available on crate feature runtime only.

Returns the number of WebAssembly tables currently allocated.

pub fn stacks(&self) -> usize

Available on crate features runtime and async only.

Returns the number of WebAssembly stacks currently allocated.

pub fn gc_heaps(&self) -> usize

Available on crate features runtime and gc only.

Returns the number of WebAssembly GC heaps currently allocated.

pub fn unused_warm_memories(&self) -> u32

Available on crate feature runtime only.

Returns the number of slots for linear memories in this allocator which are not currently in use but were previously used.

A “warm” slot means that there was a previous instantiation of a memory in that slot. Warm slots are favored in general for allocating new memories over using a slot that has never been used before.

pub fn unused_memory_bytes_resident(&self) -> usize

Available on crate feature runtime only.

Returns the number of bytes in this pooling allocator which are not part of any in-used linear memory slot but were previously used and are kept resident via the *_keep_resident configuration options.

pub fn unused_warm_tables(&self) -> u32

Available on crate feature runtime only.

Returns the number of slots for tables in this allocator which are not currently in use but were previously used.

A “warm” slot means that there was a previous instantiation of a table in that slot. Warm slots are favored in general for allocating new tables over using a slot that has never been used before.

pub fn unused_table_bytes_resident(&self) -> usize

Available on crate feature runtime only.

Returns the number of bytes in this pooling allocator which are not part of any in-used linear table slot but were previously used and are kept resident via the *_keep_resident configuration options.

pub fn unused_warm_stacks(&self) -> u32

Available on crate features runtime and async only.

Returns the number of slots for stacks in this allocator which are not currently in use but were previously used.

A “warm” slot means that there was a previous use of a stack in that slot. Warm slots are favored in general for allocating new stacks over using a slot that has never been used before.

pub fn unused_stack_bytes_resident(&self) -> Option<usize>

Available on crate features runtime and async only.

Returns the number of bytes in this pooling allocator which are not part of any in-used linear stack slot but were previously used and are kept resident via the *_keep_resident configuration options.

This returns None if the async_stack_zeroing option is disabled or if the platform doesn’t manage stacks (e.g. Windows returns None).

Trait Implementations

impl Clone for PoolingAllocatorMetrics

Available on crate feature runtime only.

fn clone(&self) -> PoolingAllocatorMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.