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Bounded Thread Pool Scheduler #8372

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Merged
merged 3 commits into from
Sep 15, 2023
Merged

Bounded Thread Pool Scheduler #8372

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4d84a1f
bounded thread pool scheduler
adamgfraser Sep 8, 2023
ade9e1c
optimize
adamgfraser Sep 8, 2023
57dc61c
cleanup
adamgfraser Sep 8, 2023
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5 changes: 4 additions & 1 deletion core/jvm/src/main/scala/zio/internal/DefaultExecutors.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,10 @@ import java.util.concurrent.{RejectedExecutionException, ThreadPoolExecutor}
private[zio] abstract class DefaultExecutors {

final def makeDefault(): zio.Executor =
new ZScheduler
makeDefault(true)

final def makeDefault(autoBlocking: Boolean): zio.Executor =
new ZScheduler(autoBlocking)

final def fromThreadPoolExecutor(
es: ThreadPoolExecutor
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12 changes: 7 additions & 5 deletions core/jvm/src/main/scala/zio/internal/ZScheduler.scala
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Expand Up @@ -28,7 +28,7 @@ import java.util.concurrent.locks.LockSupport
* applications. Inspired by "Making the Tokio Scheduler 10X Faster" by Carl
* Lerche. [[https://tokio.rs/blog/2019-10-scheduler]]
*/
private final class ZScheduler extends Executor {
private final class ZScheduler(autoBlocking: Boolean) extends Executor {
private[this] val poolSize = java.lang.Runtime.getRuntime.availableProcessors
private[this] val cache = MutableConcurrentQueue.unbounded[ZScheduler.Worker]
private[this] val globalQueue = MutableConcurrentQueue.unbounded[Runnable]
Expand All @@ -47,10 +47,12 @@ private final class ZScheduler extends Executor {
}
workers.foreach(_.start())

private[this] val supervisor = makeSupervisor()
supervisor.setName("ZScheduler-Supervisor")
supervisor.setDaemon(true)
supervisor.start()
if (autoBlocking) {
val supervisor = makeSupervisor()
supervisor.setName("ZScheduler-Supervisor")
supervisor.setDaemon(true)
supervisor.start()
}

def metrics(implicit unsafe: Unsafe): Option[ExecutionMetrics] = {
val metrics = new ExecutionMetrics {
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