User-managed concurrency groups

Posted Dec 31, 2021 22:47 UTC (Fri) by Cyberax (✭ supporter ✭, #52523)
In reply to: User-managed concurrency groups by foom
Parent article: User-managed concurrency groups

> This mechanism clearly works, but it really doesn't seem ideal. If the kernel could, instead, notify the go scheduler when a thread has blocked, all this guessing and heuristics could be eliminated.

I'm not sure if it would help. You still need a scheduler thread and checking for a stuck thread right now is pretty fast. I guess one thing that might be helpful is ability to force-preempt threads. Right now Go uses signals for that, and signals have their drawbacks.