Virtual Thread Pinning

Virtual Thread Pinning — A condition in which a virtual thread cannot unmount from its carrier thread during a blocking operation, reducing scalability under concurrency.

Version and Runtime Boundary

Pinning is a scalability concern only when a pinned virtual thread blocks long enough or often enough to occupy scarce carrier threads.

Related JVM Concepts

• Virtual Thread
• Context Switch
• Blocking I/O
• Safepoint

Source

• https://openjdk.org/jeps/491