Struct mmtk::scheduler::worker::GCWorker

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pub struct GCWorker<VM: VMBinding> {
    pub tls: VMWorkerThread,
    pub ordinal: usize,
    scheduler: Arc<GCWorkScheduler<VM>>,
    copy: GCWorkerCopyContext<VM>,
    pub mmtk: &'static MMTK<VM>,
    pub shared: Arc<GCWorkerShared<VM>>,
    pub local_work_buffer: Worker<Box<dyn GCWork<VM>>>,
}
Expand description

A GC worker. This part is privately owned by a worker thread.

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§tls: VMWorkerThread

The VM-specific thread-local state of the GC thread.

§ordinal: usize

The ordinal of the worker, numbered from 0 to the number of workers minus one.

§scheduler: Arc<GCWorkScheduler<VM>>

The reference to the scheduler.

§copy: GCWorkerCopyContext<VM>

The copy context, used to implement copying GC.

§mmtk: &'static MMTK<VM>

The reference to the MMTk instance.

§shared: Arc<GCWorkerShared<VM>>

Reference to the shared part of the GC worker. It is used for synchronization.

§local_work_buffer: Worker<Box<dyn GCWork<VM>>>

Local work packet queue.

Implementations§

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impl<VM: VMBinding> GCWorker<VM>

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pub(crate) fn new( mmtk: &'static MMTK<VM>, ordinal: usize, scheduler: Arc<GCWorkScheduler<VM>>, shared: Arc<GCWorkerShared<VM>>, local_work_buffer: Worker<Box<dyn GCWork<VM>>> ) -> Self

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const LOCALLY_CACHED_WORK_PACKETS: usize = 16usize

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pub fn add_work_prioritized( &mut self, bucket: WorkBucketStage, work: impl GCWork<VM> )

Add a work packet to the work queue and mark it with a higher priority. If the bucket is activated, the packet will be pushed to the local queue, otherwise it will be pushed to the global bucket with a higher priority.

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pub fn add_work(&mut self, bucket: WorkBucketStage, work: impl GCWork<VM>)

Add a work packet to the work queue. If the bucket is activated, the packet will be pushed to the local queue, otherwise it will be pushed to the global bucket.

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pub fn scheduler(&self) -> &GCWorkScheduler<VM>

Get the scheduler. There is only one scheduler per MMTk instance.

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pub fn get_copy_context_mut(&mut self) -> &mut GCWorkerCopyContext<VM>

Get a mutable reference of the copy context for this worker.

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fn poll(&mut self) -> Result<Box<dyn GCWork<VM>>, WorkerShouldExit>

Poll a ready-to-execute work packet in the following order:

  1. Any packet that should be processed only by this worker.
  2. Poll from the local work queue.
  3. Poll from activated global work-buckets
  4. Steal from other workers
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pub fn run(self: Box<Self>, tls: VMWorkerThread, mmtk: &'static MMTK<VM>)

Entry point of the worker thread.

This function will resolve thread affinity, if it has been specified by the user.

Each worker will keep polling and executing work packets in a loop. It runs until the worker is requested to exit. Currently a worker may exit after crate::mmtk::MMTK::prepare_to_fork is called.

Arguments:

  • tls: The VM-specific thread-local storage for this GC worker thread.
  • mmtk: A reference to an MMTk instance.

Auto Trait Implementations§

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impl<VM> !RefUnwindSafe for GCWorker<VM>

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impl<VM> Send for GCWorker<VM>

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impl<VM> !Sync for GCWorker<VM>

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impl<VM> Unpin for GCWorker<VM>

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impl<VM> !UnwindSafe for GCWorker<VM>

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