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问题描述
我很好奇Go语言如何安排goroutine。它只在通道请求和I / O期间切换，还是有周期性的协同切换循环？
I am curious as to how the Go language schedules goroutines. Does it switch only during channel requests and I/O or does it have a periodic coroutine switching loop?
推荐答案
一个抢先调度器，但一个是。所以不，Go将不会在仅限CPU的计算期间切换上下文，仅在I / O期间（从内存读取也被视为I / O，如果它不在寄存器中）。您可以在中阅读一些讨论。
Go does not have a preemptive scheduler yet, but one is planned for 1.2. So no, Go will not switch context during CPU-only calculations, only during I/O (reading from memory is also considered I/O if it isn't in a register already). You can read some discussion about it in Issue 543 - preemptive scheduling.
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