/usr/share/gocode/src/github.com/hanwen/go-fuse/benchmark/bulkstat/main.go is in golang-github-hanwen-go-fuse-dev 0.0~git20171124.0.14c3015-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 | // Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bufio"
"flag"
"log"
"os"
"path/filepath"
"sync"
)
func BulkStat(parallelism int, files []string) {
todo := make(chan string, len(files))
var wg sync.WaitGroup
wg.Add(parallelism)
for i := 0; i < parallelism; i++ {
go func() {
for {
fn := <-todo
if fn == "" {
break
}
_, err := os.Lstat(fn)
if err != nil {
log.Fatal("All stats should succeed:", err)
}
}
wg.Done()
}()
}
for _, v := range files {
todo <- v
}
close(todo)
wg.Wait()
}
func ReadLines(name string) []string {
f, err := os.Open(name)
if err != nil {
log.Fatal("ReadLines: ", err)
}
defer f.Close()
r := bufio.NewReader(f)
l := []string{}
for {
line, _, err := r.ReadLine()
if line == nil || err != nil {
break
}
fn := string(line)
l = append(l, fn)
}
if len(l) == 0 {
log.Fatal("no files added")
}
return l
}
func main() {
N := flag.Int("N", 1000, "how many files to stat")
cpu := flag.Int("cpu", 1, "how many threads to use")
prefix := flag.String("prefix", "", "mount point")
quiet := flag.Bool("quiet", false, "be quiet")
flag.Parse()
f := flag.Arg(0)
files := ReadLines(f)
for i, f := range files {
files[i] = filepath.Join(*prefix, f)
}
if !*quiet {
log.Printf("statting %d with %d threads; first file %s (%d names)", *N, *cpu, files[0], len(files))
}
todo := *N
for todo > 0 {
if len(files) > todo {
files = files[:todo]
}
BulkStat(*cpu, files)
todo -= len(files)
}
}
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