gettid.go

package main

import (
    "fmt"
    "time"
    "syscall"
)

func main() {
    ticker := time.NewTicker(time.Second)
    go func() {
        for t := range ticker.C {
            fmt.Print(syscall.Gettid(), " ")
        }
    }()		
    time.Sleep(time.Second * 10)
    ticker.Stop()
}
// выводит: 
// 70 70 70 70 70 70 70 69 69