diff --git a/kmpp/base/inc/kmpp_obj_helper.h b/kmpp/base/inc/kmpp_obj_helper.h
index f177f7a8..4ca3f50a 100644
--- a/kmpp/base/inc/kmpp_obj_helper.h
+++ b/kmpp/base/inc/kmpp_obj_helper.h
@@ -313,7 +313,7 @@ void CONCAT_US(KMPP_OBJ_NAME, unregister)(void)
     KMPP_OBJ_DBG_LOG("unregister leave\n");
 }
 
-MPP_SINGLETON(KMPP_OBJ_SGLN_ID, TO_STR(KMPP_OBJ_NAME), CONCAT_US(KMPP_OBJ_NAME, register), CONCAT_US(KMPP_OBJ_NAME, unregister));
+MPP_SINGLETON(KMPP_OBJ_SGLN_ID, KMPP_OBJ_NAME, CONCAT_US(KMPP_OBJ_NAME, register), CONCAT_US(KMPP_OBJ_NAME, unregister));
 
 rk_s32 CONCAT_US(KMPP_OBJ_NAME, size)(void)
 {
diff --git a/kmpp/base/inc/kmpp_obj_macro.h b/kmpp/base/inc/kmpp_obj_macro.h
index 7147c339..ed98f3ef 100644
--- a/kmpp/base/inc/kmpp_obj_macro.h
+++ b/kmpp/base/inc/kmpp_obj_macro.h
@@ -14,7 +14,8 @@
 
 #include "kmpp_obj.h"
 
-#define TO_STR(x)                   #x
+#define _TO_STR(x)                  #x
+#define TO_STR(x)                   _TO_STR(x)
 
 /* concat by underscore */
 #define CONCAT_US1(a)               a
diff --git a/osal/inc/mpp_singleton.h b/osal/inc/mpp_singleton.h
index 8342cb06..ede720d7 100644
--- a/osal/inc/mpp_singleton.h
+++ b/osal/inc/mpp_singleton.h
@@ -42,26 +42,31 @@ typedef struct MppSingletonInfo_t {
     void            (*deinit)(void);
 } MppSingletonInfo;
 
+#define SNGL_TO_STR(x)  #x
+#define SNGL_TO_FUNC(x) __mpp_singleton_add_##x
+/* warning: constructor priorities from 0 to 100 are reserved for the implementation */
+#define SNGL_BASE_ID    101
 #define MPP_SINGLETON(id, name, init, deinit) \
-    __attribute__((constructor)) \
-    static void __mpp_singleton_add(void) { \
+    /* increase id from base id to avoid compiler warning */ \
+    __attribute__((constructor(SNGL_BASE_ID + id))) \
+    static void SNGL_TO_FUNC(name)(void) { \
         MppSingletonInfo info = { \
             id, \
-            name, \
+            SNGL_TO_STR(name), \
             init, \
             deinit, \
         }; \
-        mpp_singleton_add(&info); \
+        mpp_singleton_add(&info, __FUNCTION__); \
     }
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-rk_s32 mpp_singleton_add(MppSingletonInfo *info);
+rk_s32 mpp_singleton_add(MppSingletonInfo *info, const char *caller);
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif /* __MPP_SINGLETON_H__ */
\ No newline at end of file
+#endif /* __MPP_SINGLETON_H__ */
diff --git a/osal/mpp_singleton.c b/osal/mpp_singleton.c
index 9272d2b4..ccba5347 100644
--- a/osal/mpp_singleton.c
+++ b/osal/mpp_singleton.c
@@ -21,29 +21,29 @@ static MppSingletonInfo sgln_info[MPP_SGLN_MAX_CNT] = {0};
 static rk_u64 sgln_mask = 0;
 static rk_u32 sgln_debug = 0;
 
-rk_s32 mpp_singleton_add(MppSingletonInfo *info)
+rk_s32 mpp_singleton_add(MppSingletonInfo *info, const char *caller)
 {
     mpp_env_get_u32("mpp_sgln_debug", &sgln_debug, 0);
 
     if (!info) {
-        sgln_dbg("can not add NULL info\n");
+        sgln_dbg("can not add NULL info at %s\n", caller);
         return rk_nok;
     }
 
     if (info->id >= MPP_SGLN_MAX_CNT) {
-        sgln_dbg("id %d larger than max %d\n", info->id, MPP_SGLN_MAX_CNT);
+        sgln_dbg("id %d larger than max %d at %s\n", info->id, MPP_SGLN_MAX_CNT, caller);
         return rk_nok;
     }
 
     if (sgln_mask & (1 << info->id)) {
-        sgln_dbg("info %d has been registered\n", info->id);
+        sgln_dbg("info %d has been registered at %s\n", info->id, caller);
         return rk_nok;
     }
 
     sgln_info[info->id] = *info;
     sgln_mask |= (1 << info->id);
 
-    sgln_dbg("info %d %s registered\n", info->id, info->name);
+    sgln_dbg("info %2d %-12s registered at %s\n", info->id, info->name, caller);
 
     return rk_ok;
 }
@@ -60,9 +60,9 @@ static void mpp_singleton_deinit(void)
             MppSingletonInfo *info = &sgln_info[i];
 
             if (info->deinit) {
-                sgln_dbg("info %d %s deinit start\n", info->id, info->name);
+                sgln_dbg("info %2d %-12s deinit start\n", info->id, info->name);
                 info->deinit();
-                sgln_dbg("info %d %s deinit finish\n", info->id, info->name);
+                sgln_dbg("info %2d %-12s deinit finish\n", info->id, info->name);
             }
         }
     }
@@ -84,9 +84,9 @@ __attribute__((constructor(65535))) static void mpp_singleton_init(void)
             MppSingletonInfo *info = &sgln_info[i];
 
             if (info->init) {
-                sgln_dbg("info %d %s init start\n", info->id, info->name);
+                sgln_dbg("info %2d %-12s init start\n", info->id, info->name);
                 info->init();
-                sgln_dbg("info %d %s init finish\n", info->id, info->name);
+                sgln_dbg("info %2d %-12s init finish\n", info->id, info->name);
             }
         }
     }