diff --git a/smoke/tests/api_test.go b/smoke/tests/api_test.go
index 9321d205495..d705feb4bd7 100644
--- a/smoke/tests/api_test.go
+++ b/smoke/tests/api_test.go
@@ -6,7 +6,11 @@ package tests
 
 import (
 	"fmt"
+	"os"
+	"os/exec"
+	"path"
 	"path/filepath"
+	"strconv"
 	"testing"
 
 	"github.com/containerd/log"
@@ -21,181 +25,53 @@ import (
 
 type APIV1TestSuite struct{}
 
-// func (a *APIV1TestSuite) TestDaemonStatus(t *testing.T) {
-
-// 	ctx := tool.DefaultContext(t)
-
-// 	ctx.PrepareWorkDir(t)
-// 	defer ctx.Destroy(t)
-
-// 	rootFs := texture.MakeLowerLayer(t, filepath.Join(ctx.Env.WorkDir, "root-fs"))
-
-// 	rafs := a.rootFsToRafs(t, ctx, rootFs)
-
-// 	nydusd, err := tool.NewNydusd(tool.NydusdConfig{
-// 		NydusdPath:      ctx.Binary.Nydusd,
-// 		BootstrapPath:   rafs,
-// 		ConfigPath:      filepath.Join(ctx.Env.WorkDir, "nydusd-config.fusedev.json"),
-// 		MountPath:       ctx.Env.MountDir,
-// 		APISockPath:     filepath.Join(ctx.Env.WorkDir, "nydusd-api.sock"),
-// 		BackendType:     "localfs",
-// 		BackendConfig:   fmt.Sprintf(`{"dir": "%s"}`, ctx.Env.BlobDir),
-// 		EnablePrefetch:  ctx.Runtime.EnablePrefetch,
-// 		BlobCacheDir:    ctx.Env.CacheDir,
-// 		CacheType:       ctx.Runtime.CacheType,
-// 		CacheCompressed: ctx.Runtime.CacheCompressed,
-// 		RafsMode:        ctx.Runtime.RafsMode,
-// 		DigestValidate:  false,
-// 	})
-// 	require.NoError(t, err)
-
-// 	err = nydusd.Mount()
-// 	require.NoError(t, err)
-// 	defer func() {
-// 		if err := nydusd.Umount(); err != nil {
-// 			log.L.WithError(err).Errorf("umount")
-// 		}
-// 	}()
-
-// 	// The implementation of runNydusd() has checked stats, however,
-// 	// it's clear of semantic to check stats again.
-// 	newCtx, cancel := context.WithCancel(context.Background())
-// 	defer cancel()
-
-// 	select {
-// 	case <-tool.CheckReady(newCtx, nydusd.APISockPath):
-// 		return
-// 	case <-time.After(50 * time.Millisecond):
-// 		require.Fail(t, "nydusd status is not RUNNING")
-// 	}
-// }
-
-// func (a *APIV1TestSuite) TestMetrics(t *testing.T) {
-
-// 	ctx := tool.DefaultContext(t)
-
-// 	ctx.PrepareWorkDir(t)
-// 	defer ctx.Destroy(t)
-
-// 	rootFs := texture.MakeLowerLayer(t, filepath.Join(ctx.Env.WorkDir, "root-fs"))
-
-// 	rafs := a.rootFsToRafs(t, ctx, rootFs)
-
-// 	nydusd, err := tool.NewNydusd(tool.NydusdConfig{
-// 		NydusdPath:      ctx.Binary.Nydusd,
-// 		BootstrapPath:   rafs,
-// 		ConfigPath:      filepath.Join(ctx.Env.WorkDir, "nydusd-config.fusedev.json"),
-// 		MountPath:       ctx.Env.MountDir,
-// 		APISockPath:     filepath.Join(ctx.Env.WorkDir, "nydusd-api.sock"),
-// 		BackendType:     "localfs",
-// 		BackendConfig:   fmt.Sprintf(`{"dir": "%s"}`, ctx.Env.BlobDir),
-// 		EnablePrefetch:  ctx.Runtime.EnablePrefetch,
-// 		BlobCacheDir:    ctx.Env.CacheDir,
-// 		CacheType:       ctx.Runtime.CacheType,
-// 		CacheCompressed: ctx.Runtime.CacheCompressed,
-// 		RafsMode:        ctx.Runtime.RafsMode,
-// 		DigestValidate:  false,
-// 		IOStatsFiles:    true,
-// 		LatestReadFiles: true,
-// 		AccessPattern:   true,
-// 	})
-// 	require.NoError(t, err)
-
-// 	err = nydusd.Mount()
-// 	require.NoError(t, err)
-// 	defer func() {
-// 		if err := nydusd.Umount(); err != nil {
-// 			log.L.WithError(err).Errorf("umount")
-// 		}
-// 	}()
-
-// 	err = a.visit(filepath.Join(ctx.Env.MountDir, "file-1"))
-// 	require.NoError(t, err)
-
-// 	gm, err := nydusd.GetGlobalMetrics()
-// 	require.NoError(t, err)
-// 	require.True(t, gm.FilesAccountEnabled)
-// 	require.True(t, gm.MeasureLatency)
-// 	require.True(t, gm.AccessPattern)
-// 	require.Equal(t, uint64(len("file-1")), gm.DataRead)
-// 	require.Equal(t, uint64(1), gm.FOPS[4])
-
-// 	err = a.visit(filepath.Join(ctx.Env.MountDir, "dir-1/file-1"))
-// 	require.NoError(t, err)
-// 	gmNew, err := nydusd.GetGlobalMetrics()
-// 	require.NoError(t, err)
-// 	require.Equal(t, gm.DataRead+uint64(len("dir-1/file-1")), gmNew.DataRead)
-// 	require.Equal(t, gm.FOPS[4]+1, gmNew.FOPS[4])
-
-// 	_, err = nydusd.GetFilesMetrics("/")
-// 	require.NoError(t, err)
-
-// 	_, err = nydusd.GetBackendMetrics("/")
-// 	require.NoError(t, err)
-
-// 	_, err = nydusd.GetLatestFileMetrics()
-// 	require.NoError(t, err)
-
-// 	apms, err := nydusd.GetAccessPatternMetrics("/")
-// 	require.NoError(t, err)
-// 	require.NotEmpty(t, apms)
-
-// 	apms, err = nydusd.GetAccessPatternMetrics("")
-// 	require.NoError(t, err)
-// 	require.NotEmpty(t, apms)
-
-// 	apms, err = nydusd.GetAccessPatternMetrics("poison")
-// 	require.NoError(t, err)
-// 	require.Empty(t, apms)
-// }
-
-// func dropPageCache(t *testing.T) {
-// 	f, err := os.OpenFile("/proc/sys/vm/drop_caches", os.O_WRONLY, 0644)
-// 	require.NoError(t, err)
-// 	defer f.Close()
-// 	_, err = f.WriteString("3")
-// 	require.NoError(t, err)
-// }
-
-// func accessMount(t *testing.T, mountPath string) {
-// 	cmd := exec.Command("bash", "-c", fmt.Sprintf("find %s -type f -print0 | xargs -0 sha256sum 2>&1 > /dev/null", mountPath))
-// 	cmd.Stderr = os.Stderr
-// 	cmd.Stdout = os.Stdout
-// 	err := cmd.Run()
-// 	require.NoError(t, err)
-// }
-
-// func limitCPUMem(t *testing.T, pid int) {
-// 	err := os.MkdirAll("/sys/fs/cgroup/cpu/default/nydusd", 0755)
-// 	require.NoError(t, err)
-
-// 	err = os.MkdirAll("/sys/fs/cgroup/memory/default/nydusd", 0755)
-// 	require.NoError(t, err)
-
-// 	period := 100000
-// 	quota := 100000               // 1c
-// 	memLimit := 512 * 1024 * 1024 // 1g
-
-// 	// Set CPU limit
-// 	err = os.WriteFile(path.Join("/sys/fs/cgroup/cpu/default/nydusd", "cpu.cfs_quota_us"), []byte(strconv.Itoa(quota)), 0644)
-// 	require.NoError(t, err)
-// 	err = os.WriteFile(path.Join("/sys/fs/cgroup/cpu/default/nydusd", "cpu.cfs_period_us"), []byte(strconv.Itoa(period)), 0644)
-// 	require.NoError(t, err)
-
-// 	// Set memory limit
-// 	err = os.WriteFile(path.Join("/sys/fs/cgroup/memory/default/nydusd", "memory.limit_in_bytes"), []byte(strconv.Itoa(memLimit)), 0644)
-// 	require.NoError(t, err)
-
-// 	pidBytes := []byte(strconv.Itoa(pid))
-
-// 	fmt.Println("pidBytes", string(pidBytes))
-
-// 	err = os.WriteFile(path.Join("/sys/fs/cgroup/cpu/default/nydusd", "tasks"), pidBytes, 0644)
-// 	require.NoError(t, err)
-
-// 	err = os.WriteFile(path.Join("/sys/fs/cgroup/memory/default/nydusd", "tasks"), pidBytes, 0644)
-// 	require.NoError(t, err)
-// }
+func dropPageCache(t *testing.T) {
+	f, err := os.OpenFile("/proc/sys/vm/drop_caches", os.O_WRONLY, 0644)
+	require.NoError(t, err)
+	defer f.Close()
+	_, err = f.WriteString("3")
+	require.NoError(t, err)
+}
+
+func accessMount(t *testing.T, mountPath string) {
+	cmd := exec.Command("bash", "-c", fmt.Sprintf("find %s -type f -print0 | xargs -0 sha256sum 2>&1 > /dev/null", mountPath))
+	cmd.Stderr = os.Stderr
+	cmd.Stdout = os.Stdout
+	err := cmd.Run()
+	require.NoError(t, err)
+}
+
+func limitCPUMem(t *testing.T, pid int) {
+	err := os.MkdirAll("/sys/fs/cgroup/cpu/default/nydusd", 0755)
+	require.NoError(t, err)
+
+	err = os.MkdirAll("/sys/fs/cgroup/memory/default/nydusd", 0755)
+	require.NoError(t, err)
+
+	period := 100000
+	quota := 100000               // 1c
+	memLimit := 512 * 1024 * 1024 // 1g
+
+	// Set CPU limit
+	err = os.WriteFile(path.Join("/sys/fs/cgroup/cpu/default/nydusd", "cpu.cfs_quota_us"), []byte(strconv.Itoa(quota)), 0644)
+	require.NoError(t, err)
+	err = os.WriteFile(path.Join("/sys/fs/cgroup/cpu/default/nydusd", "cpu.cfs_period_us"), []byte(strconv.Itoa(period)), 0644)
+	require.NoError(t, err)
+
+	// Set memory limit
+	err = os.WriteFile(path.Join("/sys/fs/cgroup/memory/default/nydusd", "memory.limit_in_bytes"), []byte(strconv.Itoa(memLimit)), 0644)
+	require.NoError(t, err)
+
+	pidBytes := []byte(strconv.Itoa(pid))
+
+	fmt.Println("pidBytes", string(pidBytes))
+
+	err = os.WriteFile(path.Join("/sys/fs/cgroup/cpu/default/nydusd", "tasks"), pidBytes, 0644)
+	require.NoError(t, err)
+
+	err = os.WriteFile(path.Join("/sys/fs/cgroup/memory/default/nydusd", "tasks"), pidBytes, 0644)
+	require.NoError(t, err)
+}
 
 func (a *APIV1TestSuite) TestMultipleMounts1(t *testing.T) {
 	ctx := tool.DefaultContext(t)
@@ -325,59 +201,6 @@ func (a *APIV1TestSuite) TestMultipleMounts2(t *testing.T) {
 	}
 }
 
-// func (a *APIV1TestSuite) TestPrefetch(t *testing.T) {
-
-// 	ctx := tool.DefaultContext(t)
-
-// 	ctx.PrepareWorkDir(t)
-// 	defer ctx.Destroy(t)
-
-// 	rootFs := texture.MakeLowerLayer(
-// 		t,
-// 		filepath.Join(ctx.Env.WorkDir, "root-fs"),
-// 		texture.LargerFileMaker("large-blob.bin", 5))
-
-// 	rafs := a.rootFsToRafs(t, ctx, rootFs)
-
-// 	config := tool.NydusdConfig{
-// 		NydusdPath:  ctx.Binary.Nydusd,
-// 		MountPath:   ctx.Env.MountDir,
-// 		APISockPath: filepath.Join(ctx.Env.WorkDir, "nydusd-api.sock"),
-// 		ConfigPath:  filepath.Join(ctx.Env.WorkDir, "nydusd-config.fusedev.json"),
-// 	}
-// 	nydusd, err := tool.NewNydusd(config)
-// 	require.NoError(t, err)
-
-// 	err = nydusd.Mount()
-// 	require.NoError(t, err)
-// 	defer func() {
-// 		if err := nydusd.Umount(); err != nil {
-// 			log.L.WithError(err).Errorf("umount")
-// 		}
-// 	}()
-
-// 	config.BootstrapPath = rafs
-// 	config.MountPath = "/pseudo_fs_1"
-// 	config.BackendType = "localfs"
-// 	config.BackendConfig = fmt.Sprintf(`{"dir": "%s"}`, ctx.Env.BlobDir)
-// 	config.EnablePrefetch = true
-// 	config.PrefetchFiles = []string{"/"}
-// 	config.BlobCacheDir = ctx.Env.CacheDir
-// 	config.CacheType = ctx.Runtime.CacheType
-// 	config.CacheCompressed = ctx.Runtime.CacheCompressed
-// 	config.RafsMode = ctx.Runtime.RafsMode
-// 	nydusd.MountByAPI(t, config)
-// 	require.NoError(t, err)
-// 	time.Sleep(time.Millisecond * 15)
-
-// 	bcm, err := nydusd.GetBlobCacheMetrics("")
-// 	require.NoError(t, err)
-// 	require.Greater(t, bcm.PrefetchDataAmount, uint64(0))
-
-// 	_, err = nydusd.GetBlobCacheMetrics("/pseudo_fs_1")
-// 	require.NoError(t, err)
-// }
-
 func (a *APIV1TestSuite) rootFsToRafs(t *testing.T, ctx *tool.Context, rootFs *tool.Layer) string {
 	digest := rootFs.Pack(t,
 		converter.PackOption{
@@ -397,18 +220,6 @@ func (a *APIV1TestSuite) rootFsToRafs(t *testing.T, ctx *tool.Context, rootFs *t
 	return bootstrap
 }
 
-// func (a *APIV1TestSuite) visit(path string) error {
-// 	f, err := os.Open(path)
-// 	if err != nil {
-// 		return err
-// 	}
-// 	defer f.Close()
-
-// 	io.ReadAll(f)
-
-// 	return nil
-// }
-
 func TestAPI(t *testing.T) {
 	test.Run(t, &APIV1TestSuite{})
 }