// Benchmark the read speed of the underlying block device for a given file.
func main() {
pathname := "/"
if len(os.Args) == 2 {
pathname = os.Args[1]
}
bytesPerSecond, blocksPerSecond, err := fsbench.GetReadSpeed(pathname)
if err != nil {
fmt.Printf("Error! %s\n", err)
return
}
ctx := fsrateio.NewContext(bytesPerSecond, blocksPerSecond)
fmt.Println(ctx)
var file *os.File
file, err = os.Open(pathname)
if err != nil {
fmt.Printf("Error! %s\n", err)
return
}
rd := bufio.NewReader(fsrateio.NewReader(file, ctx))
buffer := make([]byte, 65536)
timeStart := time.Now()
tread := 0
for {
n := 0
n, err = rd.Read(buffer)
if n < 1 && err == io.EOF {
break
}
if err != nil {
fmt.Printf("Error! %s\n", err)
return
}
tread += n
}
bytesPerSecond = uint64(float64(tread) / time.Since(timeStart).Seconds())
fmt.Printf("%s/s\n", fsrateio.FormatBytes(bytesPerSecond))
}
func main() {
flag.Parse()
var err error
bytesPerSecond, blocksPerSecond, err := fsbench.GetReadSpeed(*rootDir)
if err != nil {
fmt.Printf("Error! %s\n", err)
return
}
ctx := fsrateio.NewContext(bytesPerSecond, blocksPerSecond)
if *scanSpeed != 0 {
ctx.SetSpeedPercent(*scanSpeed)
}
fmt.Println(ctx)
syscall.Setpriority(syscall.PRIO_PROCESS, 0, 10)
var prev_fs *scanner.FileSystem
sleepDuration, _ := time.ParseDuration(fmt.Sprintf("%ds", *interval))
for iter := 0; *numScans < 0 || iter < *numScans; iter++ {
timeStart := time.Now()
fs, err := scanner.ScanFileSystem(*rootDir, *objectCache, ctx)
timeStop := time.Now()
if iter > 0 {
fmt.Println()
}
if err != nil {
fmt.Printf("Error! %s\n", err)
return
}
fmt.Print(fs)
fmt.Printf("Total scanned: %s,\t",
fsrateio.FormatBytes(fs.TotalDataBytes))
bytesPerSecond := uint64(float64(fs.TotalDataBytes) /
timeStop.Sub(timeStart).Seconds())
fmt.Printf("%s/s\n", fsrateio.FormatBytes(bytesPerSecond))
if prev_fs != nil {
if !scanner.Compare(prev_fs, fs, os.Stdout) {
fmt.Println("Scan results different from last run")
}
}
runtime.GC() // Clean up before showing memory statistics.
memstats.WriteMemoryStats(os.Stdout)
if *debugFile != "" {
file, err := os.Create(*debugFile)
if err != nil {
fmt.Printf("Error! %s\n", err)
return
}
w := bufio.NewWriter(file)
fs.DebugWrite(w, "")
w.Flush()
file.Close()
}
if *rpcFile != "" {
file, err := os.Create(*rpcFile)
if err != nil {
fmt.Printf("Error creating: %s\t%s\n", *rpcFile, err)
os.Exit(1)
}
encoder := gob.NewEncoder(file)
encoder.Encode(fs)
file.Close()
}
prev_fs = fs
time.Sleep(sleepDuration)
}
}
func main() {
flag.Parse()
workingRootDir := path.Join(*subdDir, "root")
objectsDir := path.Join(*subdDir, "objects")
tmpDir := path.Join(*subdDir, "tmp")
if !createDirectory(workingRootDir) {
os.Exit(1)
}
if !sanityCheck() {
os.Exit(1)
}
if !createDirectory(objectsDir) {
os.Exit(1)
}
if !createDirectory(tmpDir) {
os.Exit(1)
}
if !mountTmpfs(tmpDir) {
os.Exit(1)
}
if !unshareAndBind(workingRootDir) {
os.Exit(1)
}
bytesPerSecond, blocksPerSecond, firstScan, ok := getCachedSpeed(
workingRootDir, tmpDir)
if !ok {
os.Exit(1)
}
ctx := fsrateio.NewContext(bytesPerSecond, blocksPerSecond)
defaultSpeed := ctx.SpeedPercent()
if firstScan {
ctx.SetSpeedPercent(100)
}
if *showStats {
fmt.Println(ctx)
}
var fsh scanner.FileSystemHistory
fsChannel := scanner.StartScannerDaemon(workingRootDir, objectsDir, ctx)
err := httpd.StartServer(*portNum, &fsh)
if err != nil {
fmt.Printf("Unable to create http server\t%s\n", err)
os.Exit(1)
}
fsh.Update(nil)
for iter := 0; true; iter++ {
if *showStats {
fmt.Printf("Starting cycle: %d\n", iter)
}
fsh.Update(<-fsChannel)
runtime.GC() // An opportune time to take out the garbage.
if *showStats {
fmt.Print(fsh)
fmt.Print(fsh.FileSystem())
memstats.WriteMemoryStats(os.Stdout)
fmt.Println()
}
if firstScan {
ctx.SetSpeedPercent(defaultSpeed)
firstScan = false
if *showStats {
fmt.Println(ctx)
}
}
}
}