Learn Goroutine

Definitions

An OS thread, which is the thread of execution managed by the OS and works pretty much like your standard POSIX thread. In the runtime code, it's called M for machine.

A goroutine, which includes the stack, the instruction pointer and other information important for scheduling goroutines, like any channel it might be blocked on. In the runtime code, it's called a G.

A context for scheduling, which you can look at as a localized version of the scheduler which runs Go code on a single thread. It's the important part that lets us go from a N:1 scheduler to a M:N scheduler. In the runtime code, it's called P for processor.

Codes

package main

import (
	"fmt"
	"math/rand"
	"net/http"
	"os"
	"sync"
	"time"

	logger "github.com/sirupsen/logrus"
	"github.com/x-cray/logrus-prefixed-formatter"
)

func init() {
	logger.SetFormatter(&prefixed.TextFormatter{
		TimestampFormat: "2006-01-02 15:04:05",
		FullTimestamp:   true,
		ForceFormatting: true,
		DisableColors:   true,
	})
	logger.SetOutput(os.Stdout)
	logger.SetLevel(logger.DebugLevel)
}

func calculate() {
	x := rand.Int()
	for i := 0; i < 1000000; i++ {
		x ^= rand.Int()
		x |= rand.Int()
		x &= rand.Int()
	}
}

func cpuIntenseTask() {
	logger.Infof("[cpuIntenseTask] started")

	wg := sync.WaitGroup{}
	for i := 0; i < 16; i++ {
		go func() {
			wg.Add(1)
			calculate()
			wg.Done()
		}()
	}
	wg.Wait()

	logger.Infof("[cpuIntenseTask] finished")
}

func sleepTask() {
	logger.Infof("[sleepTask] started")

	wg := sync.WaitGroup{}
	for i := 0; i < 64; i++ {
		go func() {
			wg.Add(1)
			time.Sleep(1500 * time.Millisecond)
			wg.Done()
		}()
	}
	wg.Wait()

	logger.Infof("[sleepTask] finished")
}

func httpGet() {
	resp, err := http.Get("https://google.com")
	if err != nil {
		fmt.Printf("httpGet error: %v\n", err)
		return
	}
	logger.Infof("httpGet status: %v", resp.StatusCode)
}

func netTask() {
	logger.Infof("[netTask] started")

	wg := sync.WaitGroup{}
	for i := 0; i < 31200; i++ {
		go func() {
			wg.Add(1)
			httpGet()
			wg.Done()
		}()
	}
	wg.Wait()

	logger.Infof("[netTask] finished")
}

func main() {
	cpuIntenseTask()
	sleepTask()
	netTask()
}

$ go build
$ GODEBUG=schedtrace=1000 ./go-learn 1>learn.out 2>&1
$ cat learn.out | grep -v "error"
SCHED 0ms: gomaxprocs=4 idleprocs=2 threads=4 spinningthreads=1 idlethreads=0 runqueue=0 [1 0 0 0]
[2020-04-17 15:40:53]  INFO cpuIntenseTask: started
[2020-04-17 15:40:53]  INFO cpuIntenseTask: finished
[2020-04-17 15:40:53]  INFO sleepTask: started
[2020-04-17 15:40:53]  INFO sleepTask: finished
[2020-04-17 15:40:53]  INFO netTask: started
SCHED 100ms: gomaxprocs=4 idleprocs=0 threads=10 spinningthreads=0 idlethreads=1 runqueue=19587 [128 25 0 0]
SCHED 204ms: gomaxprocs=4 idleprocs=0 threads=10 spinningthreads=0 idlethreads=1 runqueue=23291 [30 74 33 1]
SCHED 313ms: gomaxprocs=4 idleprocs=0 threads=10 spinningthreads=0 idlethreads=1 runqueue=14978 [77 41 108 125]
SCHED 421ms: gomaxprocs=4 idleprocs=0 threads=11 spinningthreads=0 idlethreads=0 runqueue=6388 [97 74 34 109]
SCHED 529ms: gomaxprocs=4 idleprocs=0 threads=12 spinningthreads=0 idlethreads=1 runqueue=0 [3 6 2 1]
SCHED 638ms: gomaxprocs=4 idleprocs=0 threads=12 spinningthreads=0 idlethreads=1 runqueue=4 [3 0 1 9]
SCHED 743ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=3 runqueue=0 [1 0 1 4]
SCHED 853ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=0 [2 7 1 2]
SCHED 960ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=160 [0 1 39 11]
SCHED 1070ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=129 [0 1 3 6]
SCHED 1179ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=93 [20 3 24 14]
SCHED 1286ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=1549 [0 1 74 114]
SCHED 1396ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=1597 [0 0 26 88]
SCHED 1503ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=426 [96 1 44 69]
 112 4]
SCHED 1716ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=41 [9 2 69 6]
SCHED 1821ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=62 [12 0 5 1]
SCHED 1929ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=51 [9 0 6 1]
SCHED 2036ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=45 [15 0 9 1]
SCHED 2139ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=88 [1 10 7 6]
SCHED 2243ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=135 [1 1 13 11]
SCHED 2349ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=51 [1 10 4 5]
SCHED 2456ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=44 [1 7 11 0]
SCHED 2563ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=63 [1 6 10 0]
SCHED 2670ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=3 runqueue=95 [1 6 10 0]
SCHED 2770ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=83 [1 7 9 0]
SCHED 2877ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=1 [1 12 155 1]
SCHED 2981ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=105 [11 11 13 1]
SCHED 3087ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=140 [7 11 1 1]
SCHED 3195ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=73 [1 0 8 0]
SCHED 3303ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=138 [46 0 4 1]
SCHED 3413ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=147 [22 0 0 1]
SCHED 3514ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=3 runqueue=157 [5 19 51 1]
1957 [5 86 124 1]
SCHED 3728ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=133 [3 38 38 0]
SCHED 3834ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=141 [40 31 14 0]
SCHED 3937ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=37 [1 2 8 2]
SCHED 4041ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=74 [0 1 9 0]
SCHED 4147ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=60 [0 1 14 9]
SCHED 4251ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=71 [0 0 9 41]
SCHED 4357ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=5 [0 1 0 0]
SCHED 4460ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=4 [0 2 0 1]
SCHED 4567ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=202 [21 1 0 11]
SCHED 4677ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=6 runqueue=79 [7 1 8 5]
4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=46 [4 1 1 2]
SCHED 4887ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=8 [0 0 0 0]
SCHED 4996ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=18 [0 0 1 3]
SCHED 5102ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=76 [15 0 1 11]
SCHED 5209ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=109 [70 1 1 1]
SCHED 5314ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=87 [12 1 1 4]
SCHED 5419ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=14 [0 0 1 1]
SCHED 5522ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=8 [0 0 1 1]
SCHED 5622ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=3 runqueue=90 [140 1 22 0]
SCHED 5725ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=85 [91 1 9 21]
SCHED 5830ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=71 [1 1 21 2]
SCHED 5936ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=8 [1 1 0 0]
SCHED 6038ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=99 [11 2 1 0]
SCHED 6143ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=14 [97 1 4 2]
SCHED 6249ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=55 [1 62 123 33]
SCHED 6355ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=78 [1 6 4 17]
SCHED 6458ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=485 [1 100 101 111]
SCHED 6563ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=101 [1 15 5 13]
SCHED 6667ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=40 [1 2 74 0]
SCHED 6775ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=85 [1 6 8 98]
SCHED 6879ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=71 [1 14 1 1]
 8 108 0]
SCHED 7088ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=613 [14 102 43 100]
SCHED 7196ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=155 [1 101 7 13]
SCHED 7297ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=95 [1 18 7 100]
SCHED 7402ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=27 [1 2 2 4]
SCHED 7507ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=12 [119 0 0 1]
SCHED 7612ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=44 [2 8 14 1]
SCHED 7720ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=14 [4 1 2 2]
SCHED 7825ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=0 [164 0 1 0]
SCHED 7931ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=3 runqueue=36 [4 0 0 1]
SCHED 8041ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=42 [5 2 2 1]
SCHED 8143ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=62 [0 2 7 1]
SCHED 8243ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=2 runqueue=132 [1 239 26 23]
SCHED 8346ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=68 [2 4 3 4]
SCHED 8451ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=39 [6 1 1 0]
SCHED 8560ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=151 [146 0 1 9]
SCHED 8665ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=100 [1 8 0 25]
SCHED 8771ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=38 [2 1 1 1]
SCHED 8878ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=0 [1 0 0 115]
SCHED 8987ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=89 [6 17 5 3]
SCHED 9088ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=5 runqueue=901 [99 195 80 116]
SCHED 9193ms: gomaxprocs=4 idleprocs=0 threads=15 spinningthreads=0 idlethreads=4 runqueue=0 [0 0 0 0]
SCHED 9301ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 9404ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 9508ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 9615ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 9717ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 9817ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 9926ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10027ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10139ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10241ms: gomaxprocs=4 idleprocs=3 threads=15 spinningthreads=0 idlethreads=8 runqueue=0 [0 0 0 0]
SCHED 10341ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10443ms: gomaxprocs=4 idleprocs=3 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10547ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10653ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 10753ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 10865ms: gomaxprocs=4 idleprocs=3 threads=15 spinningthreads=0 idlethreads=8 runqueue=0 [0 0 0 0]
SCHED 10975ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=8 runqueue=0 [0 0 0 0]
SCHED 11087ms: gomaxprocs=4 idleprocs=3 threads=15 spinningthreads=0 idlethreads=8 runqueue=0 [0 0 0 0]
SCHED 11189ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 11291ms: gomaxprocs=4 idleprocs=2 threads=15 spinningthreads=1 idlethreads=7 runqueue=0 [0 0 0 0]
SCHED 11391ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 11501ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 11604ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 11713ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 11821ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 11930ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12041ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12141ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12247ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12354ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12456ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12558ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12666ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12769ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12878ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 12983ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13083ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13186ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13290ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13395ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13504ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13605ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13706ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
SCHED 13808ms: gomaxprocs=4 idleprocs=4 threads=15 spinningthreads=0 idlethreads=9 runqueue=0 [0 0 0 0]
[2020-04-17 15:41:07]  INFO netTask: finished

package main

import (
	"fmt"
	"os"

	logger "github.com/sirupsen/logrus"
	"github.com/x-cray/logrus-prefixed-formatter"
)

func init() {
	logger.SetFormatter(&prefixed.TextFormatter{
		TimestampFormat: "2006-01-02 15:04:05",
		FullTimestamp:   true,
		ForceFormatting: true,
		DisableColors:   true,
	})
	logger.SetOutput(os.Stdout)
	logger.SetLevel(logger.DebugLevel)
}

func main() {
	ch := make(chan string)

	go func() {
		var s string
		fmt.Scanln(&s)
		ch <- s
	}()

	s := <-ch
	logger.Infof("input is: %v", s)
}

$ GODEBUG=schedtrace=500,scheddetail=1 ./go-learn 1>learn.out 2>&1
$ cat learn.out
SCHED 0ms: gomaxprocs=4 idleprocs=2 threads=3 spinningthreads=1 idlethreads=0 runqueue=0 gcwaiting=0 nmidlelocked=0 stopwait=0 sysmonwait=0
  P0: status=1 schedtick=0 syscalltick=0 m=0 runqsize=0 gfreecnt=0
  P1: status=1 schedtick=0 syscalltick=0 m=2 runqsize=0 gfreecnt=0
  P2: status=0 schedtick=0 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  P3: status=0 schedtick=0 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  M2: p=1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=1 dying=0 spinning=false blocked=false lockedg=-1
  M1: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=1 dying=0 spinning=false blocked=false lockedg=-1
  M0: p=0 curg=-1 mallocing=0 throwing=0 preemptoff= locks=1 dying=0 spinning=false blocked=false lockedg=1
  G1: status=1() m=-1 lockedm=0
  G2: status=1() m=-1 lockedm=-1
SCHED 500ms: gomaxprocs=4 idleprocs=4 threads=5 spinningthreads=0 idlethreads=3 runqueue=0 gcwaiting=0 nmidlelocked=0 stopwait=0 sysmonwait=0
  P0: status=0 schedtick=2 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  P1: status=0 schedtick=3 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  P2: status=0 schedtick=2 syscalltick=6 m=-1 runqsize=0 gfreecnt=0
  P3: status=0 schedtick=0 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  M4: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=true lockedg=-1
  M3: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=true lockedg=-1
  M2: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=true lockedg=-1
  M1: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=1 dying=0 spinning=false blocked=false lockedg=-1
  M0: p=-1 curg=34 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=false lockedg=-1
  G1: status=4(chan receive) m=-1 lockedm=-1
  G2: status=4(force gc (idle)) m=-1 lockedm=-1
  G17: status=4(GC sweep wait) m=-1 lockedm=-1
  G18: status=4(GC scavenge wait) m=-1 lockedm=-1
  G33: status=4(finalizer wait) m=-1 lockedm=-1
  G34: status=3() m=0 lockedm=-1
SCHED 1010ms: gomaxprocs=4 idleprocs=4 threads=5 spinningthreads=0 idlethreads=3 runqueue=0 gcwaiting=0 nmidlelocked=0 stopwait=0 sysmonwait=0
  P0: status=0 schedtick=2 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  P1: status=0 schedtick=3 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  P2: status=0 schedtick=2 syscalltick=6 m=-1 runqsize=0 gfreecnt=0
  P3: status=0 schedtick=0 syscalltick=0 m=-1 runqsize=0 gfreecnt=0
  M4: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=true lockedg=-1
  M3: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=true lockedg=-1
  M2: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=true lockedg=-1
  M1: p=-1 curg=-1 mallocing=0 throwing=0 preemptoff= locks=1 dying=0 spinning=false blocked=false lockedg=-1
  M0: p=-1 curg=34 mallocing=0 throwing=0 preemptoff= locks=0 dying=0 spinning=false blocked=false lockedg=-1
  G1: status=4(chan receive) m=-1 lockedm=-1
  G2: status=4(force gc (idle)) m=-1 lockedm=-1
  G17: status=4(GC sweep wait) m=-1 lockedm=-1
  G18: status=4(GC scavenge wait) m=-1 lockedm=-1
  G33: status=4(finalizer wait) m=-1 lockedm=-1
  G34: status=3() m=0 lockedm=-1
[2020-04-17 15:55:36]  INFO input is: hello

posted @ 2020-04-17 15:48 ToRapture 阅读(90) 评论(0) 编辑收藏举报

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