Green thread

In computer programming, a green thread is a thread that is scheduled by a runtime library or virtual machine (VM) instead of natively by the underlying operating system (OS). Green threads emulate multithreaded environments without relying on any native OS abilities, and they are managed in user space instead of kernel space, enabling them to work in environments that do not have native thread support.^[1]

^ Sintes, Tony (April 13, 2001). "Four for the ages". JavaWorld. Archived from the original on 2020-07-15. Retrieved 2020-07-14. Green threads, the threads provided by the JVM, run at the user level, meaning that the JVM creates and schedules the threads itself. Therefore, the operating system kernel doesn't create or schedule them. Instead, the underlying OS sees the JVM only as one thread. Green threads prove inefficient for a number of reasons. Foremost, green threads cannot take advantage of a multiprocessor system(...) Thus, the JVM threads are bound to run within that single JVM thread that runs inside a single processor.{{cite web}}: CS1 maint: bot: original URL status unknown (link)

[javaworld-1] Sintes, Tony (April 13, 2001). "Four for the ages". JavaWorld. Archived from the original on 2020-07-15. Retrieved 2020-07-14. Green threads, the threads provided by the JVM, run at the user level, meaning that the JVM creates and schedules the threads itself. Therefore, the operating system kernel doesn't create or schedule them. Instead, the underlying OS sees the JVM only as one thread. Green threads prove inefficient for a number of reasons. Foremost, green threads cannot take advantage of a multiprocessor system(...) Thus, the JVM threads are bound to run within that single JVM thread that runs inside a single processor.{{cite web}}: CS1 maint: bot: original URL status unknown (link)

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