diff --git a/components/soc/src/esp32/include/hal/cpu_ll.h b/components/soc/src/esp32/include/hal/cpu_ll.h
index 180b615c71..f063576fb0 100644
--- a/components/soc/src/esp32/include/hal/cpu_ll.h
+++ b/components/soc/src/esp32/include/hal/cpu_ll.h
@@ -15,6 +15,8 @@
 
 #include <stdint.h>
 
+#include "esp_attr.h"
+
 #include "soc/cpu_caps.h"
 
 #include "xt_instr_macros.h"
@@ -27,7 +29,7 @@
 extern "C" {
 #endif
 
-static inline int cpu_ll_get_core_id(void)
+static inline int IRAM_ATTR cpu_ll_get_core_id(void)
 {
     uint32_t id;
     asm volatile (
diff --git a/components/soc/src/esp32s2/include/hal/cpu_ll.h b/components/soc/src/esp32s2/include/hal/cpu_ll.h
index a0a002a3fb..cfcefc3dea 100644
--- a/components/soc/src/esp32s2/include/hal/cpu_ll.h
+++ b/components/soc/src/esp32s2/include/hal/cpu_ll.h
@@ -12,9 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 #pragma once
-
 #include <stdint.h>
 
+#include "esp_attr.h"
+
 #include "soc/cpu_caps.h"
 
 #include "xt_instr_macros.h"
@@ -27,7 +28,7 @@
 extern "C" {
 #endif
 
-static inline int cpu_ll_get_core_id(void)
+static inline int IRAM_ATTR cpu_ll_get_core_id(void)
 {
     return 0;
 }
diff --git a/tools/test_apps/system/startup/sdkconfig.ci.opt_o0 b/tools/test_apps/system/startup/sdkconfig.ci.opt_o0
new file mode 100644
index 0000000000..8c66af7708
--- /dev/null
+++ b/tools/test_apps/system/startup/sdkconfig.ci.opt_o0
@@ -0,0 +1 @@
+CONFIG_COMPILER_OPTIMIZATION_NONE=y