Go from introduction to practice -- coordination mechanism (note)

Thead and Groutine Compare

Many to many diagram

Many to many , Multiple Goroutine Corresponding to the same system thread , The switching cost between them is low

Go Basic scheduling mechanism

• Processor It will be finished in a little time Goroutine Count the number , If it doesn't change for a long time , Will be implemented at present Goroutine At the end of the team ;
• When one Goroutine Interrupted by the system, such as reading and writing IO operation ,Processor Will move themselves to another System Thread Continue to complete other Goroutine. And record the current operation , After execution IO after , Continue back to the operation

Wrong way to use

What is commented out is correct , Because in go Function call in , All the parameters passed in are value passing , namely , Make another copy ; Code content without comments ,i It's a shared variable , Lock required to complete .