These notes cover the Go runtime scheduler and the operating-system scheduler article it builds on. The notation uses M for an OS thread, P for a thread, CPU, or logical processor in Go, and G for a coroutine or process, also called a goroutine.
Each P is assigned to an M when a Go program runs. An M relies on its P to context-switch Gs. Run queues come in two kinds. The global run queue is the GRQ. The local run queue is the LRQ, and there is one LRQ per P.
Golang Scheduler
Resources
Notation:
- OS thread: M.
- Thread/CPU/logical processor in Go: P.
- Coroutine/process (goroutine): G.
Each P is assigned to an M when a Go program runs. An M relies on its P to context-switch Gs.
Next come the run queues. There are two kinds:
- Global run queue (GRQ).
- Local run queue (LRQ), one per P.
See also: Race Conditions In Go · Scalable Golang Course Notes