跳到主要内容

gmp

GMP 模型​

ToC​

源码地址​

https://github.com/golang/go/blob/master/src/runtime/proc.go

源码分析​

// The bootstrap sequence is:
//
//	call osinit
//	call schedinit
//	make & queue new G
//	call runtime·mstart
//
// The new G calls runtime·main.

G 代表 goroutine，M 代表 工作线程，P 代表处理器，一个 M 要绑定一个 P，每个 P 有一个自己的本地队列。

// G - goroutine.
// M - worker thread, or machine.
// P - processor, a resource that is required to execute Go code.
//     M must have an associated P to execute Go code, however it can be
//     blocked or in a syscall w/o an associated P.

状态：Gidle,Grunnable,Grunning,Gsyscall,Gwaiting,Gdead

struct P
{
    Lock;
    G *gfree; // freelist, moved from sched
    G *ghead; // runnable, moved from sched
    G *gtail;
    MCache *mcache; // moved from M
    FixAlloc *stackalloc; // moved from M
    uint64 ncgocall;
    GCStats gcstats;
    // etc
...
};

M:N 模型​

参考链接​

https://golang.org/s/go11sched

golang 源码学习之GMP (goroutine)

https://www.jianshu.com/p/665aca7af949