Add code to profile zipfs.

example/zipfs/main.go

@@ -5,8 +5,14 @@ import (
 	"fmt"
 	"github.com/hanwen/go-fuse/fuse"
 	"github.com/hanwen/go-fuse/zipfs"
+	"io"
 	"log"
 	"os"
+	"os/exec"
+	"runtime"
+	"runtime/pprof"
+	"strings"
+	"time"
 )
 
 var _ = log.Printf
@@ -15,27 +21,64 @@ func main() {
 	// Scans the arg list and sets up flags
 	debug := flag.Bool("debug", false, "print debugging messages.")
 	latencies := flag.Bool("latencies", false, "record operation latencies.")
-
+	profile := flag.String("profile", "", "record cpu profile.")
+	mem_profile := flag.String("mem-profile", "", "record memory profile.")
+	command := flag.String("run", "", "run this command after mounting.")
+	ttl := flag.Float64("ttl", 1.0, "attribute/entry cache TTL.")
 	flag.Parse()
 	if flag.NArg() < 2 {
 		fmt.Fprintf(os.Stderr, "usage: %s MOUNTPOINT ZIP-FILE\n", os.Args[0])
 		os.Exit(2)
 	}
 
+	var profFile, memProfFile io.Writer
+	var err error
+	if *profile != "" {
+		profFile, err = os.Create(*profile)
+		if err != nil {
+			log.Fatalf("os.Create: %v", err)
+		}
+	}
+	if *mem_profile != "" {
+		memProfFile, err = os.Create(*mem_profile)
+		if err != nil {
+			log.Fatalf("os.Create: %v", err)
+		}
+	}
+	
 	var fs fuse.NodeFileSystem
-	fs, err := zipfs.NewArchiveFileSystem(flag.Arg(1))
+	fs, err = zipfs.NewArchiveFileSystem(flag.Arg(1))
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "NewArchiveFileSystem failed: %v\n", err)
 		os.Exit(1)
 	}
 
-	state, _, err := fuse.MountNodeFileSystem(flag.Arg(0), fs, nil)
+	opts := &fuse.FileSystemOptions{
+		AttrTimeout: time.Duration(*ttl * float64(time.Second)),
+		EntryTimeout: time.Duration(*ttl * float64(time.Second)),
+	}
+	state, _, err := fuse.MountNodeFileSystem(flag.Arg(0), fs, opts)
 	if err != nil {
 		fmt.Printf("Mount fail: %v\n", err)
 		os.Exit(1)
 	}
-
+ 	
 	state.SetRecordStatistics(*latencies)
 	state.Debug = *debug
+	runtime.GC()
+	if profFile != nil {
+		pprof.StartCPUProfile(profFile)
+		defer pprof.StopCPUProfile()
+	}
+
+	if *command != "" {
+		args := strings.Split(*command, " ")
+		cmd := exec.Command(args[0], args[1:]...)
+		cmd.Start()
+	}
+	
 	state.Loop()
+	if memProfFile != nil {
+		pprof.WriteHeapProfile(memProfFile)
+	}
 }