// 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.Fprintf(os.Stderr, "Error! %s\n", err)
return
}
fmt.Printf("speed=%d MiB/s ", bytesPerSecond>>20)
if blocksPerSecond > 0 {
fmt.Printf("%d blocks/s\n", blocksPerSecond)
} else {
fmt.Println("I/O accounting not available")
}
}
func getCachedFsSpeed(workingRootDir string, cacheDirname string) (bytesPerSecond,
blocksPerSecond uint64, computed, ok bool) {
bytesPerSecond = 0
blocksPerSecond = 0
devnum, err := fsbench.GetDevnumForFile(workingRootDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to get device number for: %s\t%s\n",
workingRootDir, err)
return 0, 0, false, false
}
fsbenchDir := path.Join(cacheDirname, "fsbench")
if !createDirectory(fsbenchDir) {
return 0, 0, false, false
}
cacheFilename := path.Join(fsbenchDir, strconv.FormatUint(devnum, 16))
file, err := os.Open(cacheFilename)
if err == nil {
n, err := fmt.Fscanf(file, "%d %d", &bytesPerSecond, &blocksPerSecond)
file.Close()
if n == 2 || err == nil {
return bytesPerSecond, blocksPerSecond, false, true
}
}
bytesPerSecond, blocksPerSecond, err = fsbench.GetReadSpeed(workingRootDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to measure read speed\t%s\n", err)
return 0, 0, true, false
}
file, err = os.Create(cacheFilename)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to open: %s for write\t%s\n",
cacheFilename, err)
return 0, 0, true, false
}
fmt.Fprintf(file, "%d %d\n", bytesPerSecond, blocksPerSecond)
file.Close()
return bytesPerSecond, blocksPerSecond, true, true
}
// 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.NewReaderContext(bytesPerSecond, blocksPerSecond, 0)
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(ctx.NewReader(file))
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", format.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
}
var configuration scanner.Configuration
configuration.ScanFilter, err = filter.NewFilter(nil)
if err != nil {
fmt.Printf("Unable to create empty filter\t%s\n", err)
os.Exit(1)
}
configuration.FsScanContext = fsrateio.NewReaderContext(bytesPerSecond,
blocksPerSecond, 0)
if *scanSpeed != 0 {
configuration.FsScanContext.GetContext().SetSpeedPercent(*scanSpeed)
}
fmt.Println(configuration.FsScanContext)
syscall.Setpriority(syscall.PRIO_PROCESS, 0, 10)
var prev_fs *scanner.FileSystem
for iter := 0; *numScans < 0 || iter < *numScans; iter++ {
timeStart := time.Now()
fs, err := scanner.ScanFileSystem(*rootDir, *objectCache,
&configuration)
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",
format.FormatBytes(fs.TotalDataBytes))
bytesPerSecond := uint64(float64(fs.TotalDataBytes) /
timeStop.Sub(timeStart).Seconds())
fmt.Printf("%s/s\n", format.FormatBytes(bytesPerSecond))
if prev_fs != nil {
if !scanner.CompareFileSystems(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 *gobFile != "" {
file, err := os.Create(*gobFile)
if err != nil {
fmt.Printf("Error creating: %s\t%s\n", *gobFile, err)
os.Exit(1)
}
encoder := gob.NewEncoder(file)
encoderStartTime := time.Now()
encoder.Encode(fs)
fmt.Printf("Encoder time: %s\n", time.Since(encoderStartTime))
file.Close()
}
prev_fs = fs
time.Sleep(time.Duration(*interval) * time.Second)
}
}
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)
}
}