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In the Go language, there are several ways to influence the behavior of the system scheduler, which manages goroutines:

  • runtime.GOMAXPROCS(n int) — sets the maximum number of OS threads that can execute goroutines simultaneously. Changing this value affects parallelism.

  • runtime.Gosched() — allows the current goroutine to yield the processor to other goroutines by calling the scheduler.

  • time.Sleep() — can be used to temporarily suspend a goroutine, allowing others to run.

  • Synchronization primitives (mutex, channel) — influence goroutine synchronization and blocking, indirectly affecting scheduling.

Example of using GOMAXPROCS:

package main

import (
    "fmt"
    "runtime"
)

func main() {
    fmt.Println("Default GOMAXPROCS:", runtime.GOMAXPROCS(0))
    runtime.GOMAXPROCS(2) // set to 2 threads
    fmt.Println("Updated GOMAXPROCS:", runtime.GOMAXPROCS(0))
}

This way, using the standard runtime package, you can manage the behavior of the scheduler in Go.