diff --git a/impl/camb/CMakeLists.txt b/impl/camb/CMakeLists.txt
index 8cbe3a7d8..591d911fd 100644
--- a/impl/camb/CMakeLists.txt
+++ b/impl/camb/CMakeLists.txt
@@ -32,7 +32,7 @@ endif()
 file(GLOB_RECURSE IMPL_SRC RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} functions/*.cpp common/*.cpp)
 file(GLOB_RECURSE IMPL_SRC_MMCV RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} functions_mmcv/*.cpp functions/*.mlu )
 file(GLOB_RECURSE IMPL_SRC_MMCV_MLU RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} functions_mmcv/*.mlu)
-list(APPEND IMPL_SRC mlu_ops_helper.cpp cnnl_helper.cpp diopi_helper.cpp init.cpp)
+list(APPEND IMPL_SRC mlu_ops_helper.cpp cnnl_helper.cpp diopi_helper.cpp env_vars.cpp)
 list(APPEND IMPL_SRC ${IMPL_SRC_MMCV})
 list(APPEND IMPL_SRC ${IMPL_SRC_MMCV_MLU})
 
diff --git a/impl/camb/cnnl_helper.hpp b/impl/camb/cnnl_helper.hpp
index d640f65aa..bece5beec 100644
--- a/impl/camb/cnnl_helper.hpp
+++ b/impl/camb/cnnl_helper.hpp
@@ -19,16 +19,14 @@
 
 #include "diopi_helper.hpp"
 
-extern bool isRecordOn;
-
 #define DIOPI_CALLCNNL(Expr)                                                                                                                    \
     do {                                                                                                                                        \
         void* record = nullptr;                                                                                                                 \
-        if (isRecordOn) {                                                                                                                       \
+        if (isRecordOn()) {                                                                                                                     \
             DIOPI_RECORD_START(Expr);                                                                                                           \
         }                                                                                                                                       \
         ::cnnlStatus_t ret = Expr;                                                                                                              \
-        if (isRecordOn) {                                                                                                                       \
+        if (isRecordOn()) {                                                                                                                     \
             DIOPI_RECORD_END;                                                                                                                   \
         }                                                                                                                                       \
         if (ret != ::CNNL_STATUS_SUCCESS) {                                                                                                     \
diff --git a/impl/camb/diopi_helper.hpp b/impl/camb/diopi_helper.hpp
index b0e00b8b4..647226047 100644
--- a/impl/camb/diopi_helper.hpp
+++ b/impl/camb/diopi_helper.hpp
@@ -19,6 +19,7 @@
 #include <utility>
 #include <vector>
 
+#include "env_vars.hpp"
 #include "error.hpp"
 #include "impl_functions.hpp"
 
@@ -66,16 +67,14 @@ void getFuncName(const char* expr, char* name);
 // cant' use this macro DIOPI_RECORD_END alone, but use it in pairs with DIOPI_RECORD_START
 #define DIOPI_RECORD_END diopiRecordEnd(&record);
 
-extern bool isRecordOn;
-
 #define DIOPI_CALL(Expr)                                                                                                            \
     do {                                                                                                                            \
         void* record = nullptr;                                                                                                     \
-        if (isRecordOn) {                                                                                                           \
+        if (isRecordOn()) {                                                                                                         \
             DIOPI_RECORD_START(Expr);                                                                                               \
         }                                                                                                                           \
         diopiError_t ret = Expr;                                                                                                    \
-        if (isRecordOn) {                                                                                                           \
+        if (isRecordOn()) {                                                                                                         \
             DIOPI_RECORD_END;                                                                                                       \
         }                                                                                                                           \
         if (diopiSuccess != ret) {                                                                                                  \
diff --git a/impl/camb/init.cpp b/impl/camb/env_vars.cpp
similarity index 59%
rename from impl/camb/init.cpp
rename to impl/camb/env_vars.cpp
index 908d3f59c..b8b948290 100644
--- a/impl/camb/init.cpp
+++ b/impl/camb/env_vars.cpp
@@ -3,6 +3,8 @@
  * @author DeepLink
  * @copyright  (c) 2023, DeepLink.
  */
+#include "env_vars.hpp"
+
 #include <cstdlib>
 #include <cstring>
 
@@ -15,15 +17,7 @@ bool isEnvStateOn(const char* envName) {
     return true;
 }
 
-bool isRecordOnFunc() { return isEnvStateOn("DIOPI_RECORD_ENV"); }
-
-// global vars are listed bellow
-bool isRecordOn = false;
-
-static int initFunc() {
-    // init func is called  here;
-    isRecordOn = isRecordOnFunc();
-    return 0;
+bool isRecordOn() {
+    static bool isRecord = isEnvStateOn("DIOPI_RECORD_ENV");
+    return isRecord;
 }
-
-static int initGlobalVal = initFunc();
diff --git a/impl/camb/env_vars.hpp b/impl/camb/env_vars.hpp
new file mode 100644
index 000000000..c22e864a4
--- /dev/null
+++ b/impl/camb/env_vars.hpp
@@ -0,0 +1,12 @@
+/**
+ * @file
+ * @author DeepLink
+ * @copyright  (c) 2023, DeepLink.
+ */
+
+#ifndef IMPL_CAMB_ENV_VARS_HPP_
+#define IMPL_CAMB_ENV_VARS_HPP_
+
+bool isRecordOn();
+
+#endif  // IMPL_CAMB_ENV_VARS_HPP_