Mis juhtub, kui planeerija operatsioon teisutab goroutine globaalest järjekorrast kohalikku?

In the Go (runtime scheduler), goroutines are distributed among multiple worker threads (P — processor). The global queue contains goroutines waiting to be executed, and each worker thread has its own local queue.

When the scheduler moves a goroutine from the global queue to the local queue, the following happens:

• The goroutine is removed from the shared global queue, accessible to all threads.
• It is placed into the local queue of a specific worker thread (P), which will execute it.
• This reduces contention for access to the global queue, as the local queue is serviced by a single thread.
• This mechanism improves performance through data locality and reduced locking.

Therefore, moving a goroutine from the global queue to the local queue is an optimization of the scheduler for efficient task distribution among threads and reducing synchronization costs.