package main
import (
"log"
"os"
"runtime/trace"
)
func main() {
file, err := os.Create("trace.out")
if err != nil {
log.Fatal(err)
}
defer file.Close()
err = trace.Start(file)
if err != nil {
log.Fatal(err)
}
defer trace.Stop()
ch := make(chan string)
go func() {
ch <- "Go"
}()
<-ch
}
go run main.go
go tool trace trace.out
输出
2023/11/13 15:10:36 Parsing trace...
2023/11/13 15:10:36 Splitting trace...
2023/11/13 15:10:36 Opening browser. Trace viewer is listening on http://127.0.0.1:54898
View trace：查看跟踪
Goroutine analysis：Goroutine 分析
Network blocking profile：网络阻塞概况
Synchronization blocking profile：同步阻塞概况
Syscall blocking profile：系统调用阻塞概况
Scheduler latency profile：调度延迟概况
User defined tasks：用户自定义任务
User defined regions：用户自定义区域
Minimum mutator utilization：最低 Mutator 利用率