Golang 语言如何获取线程ID(Thread ID)？ |
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Golang 性能测试，发现多核机器一直不能跑满，单核机器可以跑满，集合https://blog.csdn.net/liangzhiyang/article/details/52669851?utm_source=blogxgwz3 的调度理论，想看下某个goroutine 一秒内是否会被切走，如果被切走，就说明go在调度时会对每个核“负载均衡”。 linux 环境获取threadID的方法如下： package main import ( "fmt" "golang.org/x/sys/unix" "time" ) func see(s string) { //runtime.LockOSThread() a := time.Now() for i := 1; i < 20000; i++ { //runtime.Gosched() var sum int sum = 1 sum = sum * i fmt.Println("sum:", sum) fmt.Println("s:", s) getid("see " + s) //fmt.Println("cpus:", runtime.StackRecord{}) //fmt.Println("cpus:", runtime.LockOSThread) } fmt.Println(time.Since(a)) } func getid(s string) { pid := unix.Getpid() fmt.Println(s+" Getpid", pid) fmt.Println(s+" Getppid", unix.Getppid()) pgid, _ := unix.Getpgid(pid) fmt.Println(s+" Getpgid", pgid) fmt.Println(s+" Gettid", unix.Gettid()) sid, _ := unix.Getsid(pid) fmt.Println(s+" Getsid", sid) fmt.Println(s+" Getegid", unix.Getegid()) fmt.Println(s+" Geteuid", unix.Geteuid()) fmt.Println(s+" Getgid", unix.Getgid()) fmt.Println(s+" Getuid", unix.Getuid()) } func main() { go see("hello") go see("world") getid("main") time.Sleep(20 * time.Second) }运行结果： main Getpid 15413 main Getppid 15361 main Getpgid 15361 main Gettid 15413 main Getsid 15333 main Getegid 1000 main Geteuid 1000 main Getgid 1000 main Getuid 1000 sum: 1 s: hello see hello Getpid 15413 see hello Getppid 15361 see hello Getpgid 15361 see hello Gettid 15416 see hello Getsid 15333 see hello Getegid 1000 see hello Geteuid 1000 see hello Getgid 1000 see hello Getuid 1000 73.762µs sum: 1 s: world see world Getpid 15413 see world Getppid 15361 see world Getpgid 15361 see world Gettid 15415 see world Getsid 15333 see world Getegid 1000 see world Geteuid 1000 see world Getgid 1000 see world Getuid 1000 119.73µs说明：window平台获取线程ID方法： windows.GetCurrentThreadId()
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