diff --git a/README.md b/README.md
index 661bfc8f..ff32013f 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ Additionally, the repository of AlloyStack is integrated with GitHub Actions. Th
 ## Evaluation
 ### Cold start latency
 
-The cold start of AlloyStack can be categorized into two scenarios: enabling and disabling on-demand loading. The approximate cold start latency is measured using the execution time of `hello_world` and `load_all`, respectively. The following script can be used to automate the testing process. 
+The cold start of AlloyStack can be categorized into two scenarios: enabling and disabling on-demand loading. The approximate cold start latency is measured using the execution time of `hello_world` and `load_all`, respectively. You have to set the `SUDO_PASSWD` environment variable before running this test using the command `export SUDO_PASSWD=<your_password>`, since some parts of the test require it. The following script can be used to automate the testing process.
 
 ```bash
 AlloyStack$ just cold_start_latency
diff --git a/justfile b/justfile
index 4d624397..c1af6a44 100644
--- a/justfile
+++ b/justfile
@@ -143,11 +143,18 @@ init:
     rustup override set 'nightly-2023-12-01'
     rustup target add x86_64-unknown-linux-musl
     [ -f fs_images/fatfs.img ] || unzip fs_images/fatfs.zip -d fs_images
+    [ -d image_content ] || mkdir image_content
 
 asvisor:
     cargo build {{ release_flag }}
 
 cold_start_latency: asvisor all_libos
+    #!/bin/bash
+    if [ -z "$SUDO_PASSWD" ]; then
+        echo "Error: SUDO_PASSWD environment variable is not set"
+        echo "Please set it with: export SUDO_PASSWD=<your_password>" && exit 1
+    fi
+
     just rust_func hello_world
     just rust_func load_all
     @-./scripts/del_tap.sh 2>/dev/null
@@ -197,7 +204,7 @@ py_end_to_end_latency: asvisor all_libos all_py_wasm
     -sudo mount fs_images/fatfs.img image_content 2>/dev/null
     sudo -E ./scripts/gen_data.py 1 '1 * 1024 * 1024' 1 '1 * 1024 * 1024'
 
-    sleep 3
+    sleep 5
     @echo 'Python word count cost: '
     target/{{profile}}/asvisor --files isol_config/wasmtime_cpython_wordcount_c1.json --metrics total-dur 2>&1 | grep 'total_dur'