func sanityCheck() bool {
r_devnum, err := fsbench.GetDevnumForFile(*rootDir)
if err != nil {
fmt.Printf("Unable to get device number for: %s\t%s\n", *rootDir, err)
return false
}
s_devnum, err := fsbench.GetDevnumForFile(*subdDir)
if err != nil {
fmt.Printf("Unable to get device number for: %s\t%s\n", *subdDir, err)
return false
}
if r_devnum != s_devnum {
fmt.Printf("rootDir and subdDir must be on the same file-system\n")
return false
}
return true
}
func sanityCheck() bool {
r_devnum, err := fsbench.GetDevnumForFile(*rootDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to get device number for: %s\t%s\n",
*rootDir, err)
return false
}
subdDirPathname := path.Join(*rootDir, *subdDir)
s_devnum, err := fsbench.GetDevnumForFile(subdDirPathname)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to get device number for: %s\t%s\n",
subdDirPathname, err)
return false
}
if r_devnum != s_devnum {
fmt.Fprintf(os.Stderr,
"rootDir and subdDir must be on the same file-system\n")
return false
}
return true
}
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
}