diff --git a/src/packet_io/packet_io.cpp b/src/packet_io/packet_io.cpp
index c9d9d94..5fa2472 100644
--- a/src/packet_io/packet_io.cpp
+++ b/src/packet_io/packet_io.cpp
@@ -88,11 +88,6 @@ void packet_io_free(struct packet_io *handle)
     }
 }
 
-struct packet_io_stat *packet_io_get_stat(struct packet_io *handle)
-{
-    return (struct packet_io_stat *)handle->on_stat(handle->handle);
-}
-
 void packet_io_print_stat(struct packet_io *handle)
 {
     struct packet_io_stat *stat = packet_io_get_stat(handle);
@@ -104,6 +99,11 @@ void packet_io_print_stat(struct packet_io *handle)
     PACKET_IO_LOG_DEBUG("keepalive_pkts : %lu, keepalive_bytes : %lu", stat->keepalive_pkts, stat->keepalive_bytes);
 }
 
+struct packet_io_stat *packet_io_get_stat(struct packet_io *handle)
+{
+    return (struct packet_io_stat *)handle->on_stat(handle->handle);
+}
+
 int packet_io_init(struct packet_io *handle, uint16_t thread_id)
 {
     return handle->on_init(handle->handle, thread_id);
diff --git a/src/packet_io/packet_io.h b/src/packet_io/packet_io.h
index 27685a5..46d28b1 100644
--- a/src/packet_io/packet_io.h
+++ b/src/packet_io/packet_io.h
@@ -55,8 +55,8 @@ struct packet_io_config
 struct packet_io;
 struct packet_io *packet_io_new(struct packet_io_config *config);
 void packet_io_free(struct packet_io *handle);
-struct packet_io_stat *packet_io_get_stat(struct packet_io *handle);
 void packet_io_print_stat(struct packet_io *handle);
+struct packet_io_stat *packet_io_get_stat(struct packet_io *handle);
 
 // return 0 if success, -1 if failed
 int packet_io_init(struct packet_io *handle, uint16_t thread_id);
diff --git a/src/session/session_manager.cpp b/src/session/session_manager.cpp
index 5a6637e..d82fb1b 100644
--- a/src/session/session_manager.cpp
+++ b/src/session/session_manager.cpp
@@ -1258,25 +1258,7 @@ uint64_t session_manager_get_expire_interval(struct session_manager *mgr)
      return session_timer_next_expire_interval(mgr->sess_timer);
 }
 
-void session_manager_get_session_counter(struct session_manager *mgr, struct session_counter *out)
-{
-     out->tcp_sess_num = mgr->tcp_sess_num;
-     out->tcp_opening_sess_num = mgr->tcp_opening_sess_num;
-     out->tcp_active_sess_num = mgr->tcp_active_sess_num;
-     out->tcp_closing_sess_num = mgr->tcp_closing_sess_num;
-
-     out->udp_sess_num = mgr->udp_sess_num;
-     out->udp_opening_sess_num = mgr->udp_opening_sess_num;
-     out->udp_active_sess_num = mgr->udp_active_sess_num;
-     out->udp_closing_sess_num = mgr->udp_closing_sess_num;
-
-     out->tcp_overload_evict_old_sess_num = mgr->tcp_overload_evict_old_sess_num;
-     out->tcp_overload_evict_new_sess_num = mgr->tcp_overload_evict_new_sess_num;
-     out->udp_overload_evict_old_sess_num = mgr->udp_overload_evict_old_sess_num;
-     out->udp_overload_evict_new_sess_num = mgr->udp_overload_evict_new_sess_num;
-}
-
-void session_manager_print_status(struct session_manager *mgr)
+void session_manager_print_stat(struct session_manager *mgr)
 {
      printf("session manager status:\n");
 
@@ -1303,4 +1285,22 @@ void session_manager_print_status(struct session_manager *mgr)
      printf("    hit tcp discard   : %lu  (drop)\n", mgr->npkts_hit_tcp_discard);
 
      printf("    hit udp evicted   : %lu  (bypass)\n", mgr->npkts_hit_udp_evicted);
-}
\ No newline at end of file
+}
+
+void session_manager_get_stat(struct session_manager *mgr, struct session_manager_stat *out)
+{
+     out->tcp_sess_num = mgr->tcp_sess_num;
+     out->tcp_opening_sess_num = mgr->tcp_opening_sess_num;
+     out->tcp_active_sess_num = mgr->tcp_active_sess_num;
+     out->tcp_closing_sess_num = mgr->tcp_closing_sess_num;
+
+     out->udp_sess_num = mgr->udp_sess_num;
+     out->udp_opening_sess_num = mgr->udp_opening_sess_num;
+     out->udp_active_sess_num = mgr->udp_active_sess_num;
+     out->udp_closing_sess_num = mgr->udp_closing_sess_num;
+
+     out->tcp_overload_evict_old_sess_num = mgr->tcp_overload_evict_old_sess_num;
+     out->tcp_overload_evict_new_sess_num = mgr->tcp_overload_evict_new_sess_num;
+     out->udp_overload_evict_old_sess_num = mgr->udp_overload_evict_old_sess_num;
+     out->udp_overload_evict_new_sess_num = mgr->udp_overload_evict_new_sess_num;
+}
diff --git a/src/session/session_manager.h b/src/session/session_manager.h
index b8c7ec3..74d2e68 100644
--- a/src/session/session_manager.h
+++ b/src/session/session_manager.h
@@ -68,7 +68,7 @@ struct session *session_manager_get_evicted_session(struct session_manager *mgr)
 // return >0: next expire interval
 uint64_t session_manager_get_expire_interval(struct session_manager *mgr);
 
-struct session_counter
+struct session_manager_stat
 {
     uint64_t tcp_sess_num;
     uint64_t tcp_opening_sess_num;
@@ -86,8 +86,8 @@ struct session_counter
     uint64_t udp_overload_evict_new_sess_num;
 };
 
-void session_manager_get_session_counter(struct session_manager *mgr, struct session_counter *out);
-void session_manager_print_status(struct session_manager *mgr);
+void session_manager_print_stat(struct session_manager *mgr);
+void session_manager_get_stat(struct session_manager *mgr, struct session_manager_stat *out);
 
 #ifdef __cpluscplus
 }
diff --git a/src/session/test/gtest_overload_evict_tcp_sess.cpp b/src/session/test/gtest_overload_evict_tcp_sess.cpp
index 9268d4e..3203a0f 100644
--- a/src/session/test/gtest_overload_evict_tcp_sess.cpp
+++ b/src/session/test/gtest_overload_evict_tcp_sess.cpp
@@ -35,7 +35,7 @@ TEST(OVERLOAD, EVICT_TCP_OLD_SESS)
         EXPECT_TRUE(sess);
 
         __session_dispatch(sess);
-        session_manager_print_status(mgr);
+        session_manager_print_stat(mgr);
 
         if (i == config.max_tcp_session_num - 1)
         {
@@ -67,14 +67,14 @@ TEST(OVERLOAD, EVICT_TCP_OLD_SESS)
     packet_get_innermost_tuple6(&pkt, &key);
     EXPECT_TRUE(tuple6_cmp(session_get0_key(sess), &key) == 0);
     __session_dispatch(sess);
-    session_manager_print_status(mgr);
+    session_manager_print_stat(mgr);
 
     printf("\n====================== expired session ======================\n\n");
     __session_manager_wait(mgr, CLOSING_BY_TIMEOUT);
     __session_manager_wait(mgr, CLOSING_BY_TIMEOUT);
 
     printf("\n====================== end status ======================\n\n");
-    session_manager_print_status(mgr);
+    session_manager_print_stat(mgr);
     __session_manager_check_counter(mgr,
                                     0, 0, 0, // tcp_opening_sess_num, tcp_active_sess_num, tcp_closing_sess_num,
                                     0, 0, 0, // udp_opening_sess_num, udp_active_sess_num, udp_closing_sess_num,
@@ -131,7 +131,7 @@ TEST(OVERLOAD, EVICT_TCP_NEW_SESS)
         }
 
         __session_dispatch(sess);
-        session_manager_print_status(mgr);
+        session_manager_print_stat(mgr);
     }
 
     printf("\n====================== expired session ======================\n\n");
@@ -139,7 +139,7 @@ TEST(OVERLOAD, EVICT_TCP_NEW_SESS)
     __session_manager_wait(mgr, CLOSING_BY_TIMEOUT);
 
     printf("\n====================== end status ======================\n\n");
-    session_manager_print_status(mgr);
+    session_manager_print_stat(mgr);
     __session_manager_check_counter(mgr,
                                     0, 0, 0, // tcp_opening_sess_num, tcp_active_sess_num, tcp_closing_sess_num,
                                     0, 0, 0, // udp_opening_sess_num, udp_active_sess_num, udp_closing_sess_num,
diff --git a/src/session/test/gtest_overload_evict_udp_sess.cpp b/src/session/test/gtest_overload_evict_udp_sess.cpp
index b4b32c5..bdd2b75 100644
--- a/src/session/test/gtest_overload_evict_udp_sess.cpp
+++ b/src/session/test/gtest_overload_evict_udp_sess.cpp
@@ -35,7 +35,7 @@ TEST(OVERLOAD, EVICT_UDP_OLD_SESS)
         EXPECT_TRUE(sess);
 
         __session_dispatch(sess);
-        session_manager_print_status(mgr);
+        session_manager_print_stat(mgr);
 
         if (i == config.max_udp_session_num - 1)
         {
@@ -67,14 +67,14 @@ TEST(OVERLOAD, EVICT_UDP_OLD_SESS)
     packet_get_innermost_tuple6(&pkt, &key);
     EXPECT_TRUE(tuple6_cmp(session_get0_key(sess), &key) == 0);
     __session_dispatch(sess);
-    session_manager_print_status(mgr);
+    session_manager_print_stat(mgr);
 
     printf("\n====================== expired session ======================\n\n");
     __session_manager_wait(mgr, CLOSING_BY_TIMEOUT);
     __session_manager_wait(mgr, CLOSING_BY_TIMEOUT);
 
     printf("\n====================== end status ======================\n\n");
-    session_manager_print_status(mgr);
+    session_manager_print_stat(mgr);
     __session_manager_check_counter(mgr,
                                     0, 0, 0, // tcp_opening_sess_num, tcp_active_sess_num, tcp_closing_sess_num,
                                     0, 0, 0, // udp_opening_sess_num, udp_active_sess_num, udp_closing_sess_num,
@@ -131,7 +131,7 @@ TEST(OVERLOAD, EVICT_UDP_NEW_SESS)
         }
 
         __session_dispatch(sess);
-        session_manager_print_status(mgr);
+        session_manager_print_stat(mgr);
     }
 
     printf("\n====================== expired session ======================\n\n");
@@ -139,7 +139,7 @@ TEST(OVERLOAD, EVICT_UDP_NEW_SESS)
     __session_manager_wait(mgr, CLOSING_BY_TIMEOUT);
 
     printf("\n====================== end status ======================\n\n");
-    session_manager_print_status(mgr);
+    session_manager_print_stat(mgr);
     __session_manager_check_counter(mgr,
                                     0, 0, 0, // tcp_opening_sess_num, tcp_active_sess_num, tcp_closing_sess_num,
                                     0, 0, 0, // udp_opening_sess_num, udp_active_sess_num, udp_closing_sess_num,
diff --git a/src/session/test/test_utils.h b/src/session/test/test_utils.h
index a19e716..d64e7af 100644
--- a/src/session/test/test_utils.h
+++ b/src/session/test/test_utils.h
@@ -93,8 +93,8 @@ __attribute__((unused)) static void __session_manager_check_counter(struct sessi
                                                                     uint64_t tcp_overload_evict_new_sess_num, uint64_t tcp_overload_evict_old_sess_num,
                                                                     uint64_t udp_overload_evict_new_sess_num, uint64_t udp_overload_evict_old_sess_num)
 {
-    struct session_counter counter;
-    session_manager_get_session_counter(mgr, &counter);
+    struct session_manager_stat counter;
+    session_manager_get_stat(mgr, &counter);
 
     EXPECT_TRUE(counter.tcp_sess_num == tcp_opening_sess_num + tcp_active_sess_num + tcp_closing_sess_num);
     EXPECT_TRUE(counter.tcp_opening_sess_num == tcp_opening_sess_num);