diff --git a/bsp/nuclei/gd32vf103_rvstar/.config b/bsp/nuclei/gd32vf103_rvstar/.config
index 9b8584f97b..7d0e53f96a 100644
--- a/bsp/nuclei/gd32vf103_rvstar/.config
+++ b/bsp/nuclei/gd32vf103_rvstar/.config
@@ -19,7 +19,7 @@ CONFIG_RT_USING_OVERFLOW_CHECK=y
 CONFIG_RT_USING_HOOK=y
 CONFIG_RT_USING_IDLE_HOOK=y
 CONFIG_RT_IDLE_HOOK_LIST_SIZE=4
-CONFIG_IDLE_THREAD_STACK_SIZE=256
+CONFIG_IDLE_THREAD_STACK_SIZE=396
 CONFIG_RT_USING_TIMER_SOFT=y
 CONFIG_RT_TIMER_THREAD_PRIO=4
 CONFIG_RT_TIMER_THREAD_STACK_SIZE=512
diff --git a/bsp/nuclei/gd32vf103_rvstar/rtconfig.h b/bsp/nuclei/gd32vf103_rvstar/rtconfig.h
index b7b8898186..e260d97fb4 100644
--- a/bsp/nuclei/gd32vf103_rvstar/rtconfig.h
+++ b/bsp/nuclei/gd32vf103_rvstar/rtconfig.h
@@ -15,7 +15,7 @@
 #define RT_USING_HOOK
 #define RT_USING_IDLE_HOOK
 #define RT_IDLE_HOOK_LIST_SIZE 4
-#define IDLE_THREAD_STACK_SIZE 256
+#define IDLE_THREAD_STACK_SIZE 396
 #define RT_USING_TIMER_SOFT
 #define RT_TIMER_THREAD_PRIO 4
 #define RT_TIMER_THREAD_STACK_SIZE 512
diff --git a/bsp/nuclei/gd32vf103_rvstar/rtconfig.py b/bsp/nuclei/gd32vf103_rvstar/rtconfig.py
index ea6050a967..90eff87a06 100644
--- a/bsp/nuclei/gd32vf103_rvstar/rtconfig.py
+++ b/bsp/nuclei/gd32vf103_rvstar/rtconfig.py
@@ -47,7 +47,7 @@ if PLATFORM == 'gcc':
     LPATH   = ''
 
     if BUILD == 'debug':
-        CFLAGS += ' -O2 -ggdb'
+        CFLAGS += ' -O0 -ggdb'
         AFLAGS += ' -ggdb'
     else:
         CFLAGS += ' -O2 -Os'