Add a script to filter goroutines waiting for a given number of minutes (#17204)

docs/debugging/pprofgoparser/main.go

@@ -0,0 +1,140 @@
+// Copyright (c) 2015-2023 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"flag"
+	"fmt"
+	"log"
+	"math"
+	"os"
+	"path"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	re             *regexp.Regexp
+	goTime, margin time.Duration
+)
+
+func init() {
+	re = regexp.MustCompile(`^goroutine [0-9]+ \[[^,]+(, ([0-9]+) minutes)?\]:$`)
+
+	flag.DurationVar(&goTime, "time", 0, "goroutine block age")
+	flag.DurationVar(&margin, "margin", 0, "margin time")
+}
+
+func parseGoroutineType2(path string) (map[time.Duration][]string, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+
+	bf := bytes.Buffer{}
+
+	save := func(s string) {
+		bf.WriteString(s + "\n")
+	}
+	reset := func() {
+		bf.Reset()
+	}
+
+	ret := make(map[time.Duration][]string)
+
+	s := bufio.NewScanner(f)
+	s.Split(bufio.ScanLines)
+
+	var (
+		t            time.Duration
+		skip, record bool
+	)
+
+	for s.Scan() {
+		line := s.Text()
+		switch {
+		case skip && line != "":
+		case skip && line == "":
+			skip = false
+		case record && line == "":
+			record = false
+			ret[t] = append(ret[t], bf.String())
+			reset()
+		case record:
+			save(line)
+		default:
+			z := re.FindStringSubmatch(line)
+			if len(z) == 3 {
+				if z[2] != "" {
+					a, _ := strconv.Atoi(z[2])
+					t = time.Duration(a) * time.Minute
+					save(line)
+					record = true
+				} else {
+					skip = true
+				}
+			}
+		}
+	}
+
+	return ret, nil
+}
+
+const helpUsage = `
+
+At least one argument is required to run this tool.
+
+EXAMPLE:
+     ./pprofgoparser --time 50m --margin 1m /path/to/*-goroutines-before,debug=2.txt
+`
+
+func main() {
+	flag.Parse()
+
+	if len(flag.Args()) == 0 {
+		log.Fatal(helpUsage)
+	}
+
+	for _, arg := range flag.Args() {
+		if !strings.HasSuffix(arg, "-goroutines-before,debug=2.txt") {
+			continue
+		}
+		r, err := parseGoroutineType2(arg)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		profFName := path.Base(arg)
+		fmt.Println(strings.Repeat("=", len(profFName)))
+		fmt.Println(profFName)
+		fmt.Println(strings.Repeat("=", len(profFName)))
+		fmt.Println("")
+
+		for t, stacks := range r {
+			if goTime == 0 || math.Abs(float64(t)-float64(goTime)) <= float64(margin) {
+				for _, stack := range stacks {
+					fmt.Println(stack)
+				}
+			}
+		}
+	}
+}