import stack_dump module, receive signal USR1, dump golang all goroutine stack content to file.
use stack_dump module
package main
import (
"time"
"github.com/rfyiamcool/dump_stack"
)
func main() {
dumpStack.SetupStackTrap()
// dumpStack.SetupStackTrap("stack.log")
time.Sleep(100 * time.Second)
}
dump golang goroutine stack
kill -USR1 pid
tail stack.log
analyse top func
awk -F '[' '/goroutine \d*/{print "[" $2}' stack.log | sort | uniq -c | sort -k1nr | head -20
5030 [select]:
1910 [semacquire]:
952 [IO wait]:
198 [chan send]:
11 [sleep]:
3 [runnable]:
2 [chan receive, 6 minutes]:
2 [select, 6 minutes]:
1 [chan receive]:
1 [IO wait, 1 minutes]:
1 [running]:
1 [select, 6 minutes, locked to thread]:
1 [syscall]: