diff --git a/script/CMakeLists.txt b/script/CMakeLists.txt
index 16f3cfd..35cd5b8 100644
--- a/script/CMakeLists.txt
+++ b/script/CMakeLists.txt
@@ -1 +1,2 @@
-install(FILES stellar_stat.sh DESTINATION ./ COMPONENT Program)
\ No newline at end of file
+install(FILES python_stat.sh DESTINATION ./ COMPONENT Program)
+install(FILES shell_stat.sh DESTINATION ./ COMPONENT Program)
\ No newline at end of file
diff --git a/script/stellar_stat.sh b/script/python_stat.sh
similarity index 65%
rename from script/stellar_stat.sh
rename to script/python_stat.sh
index e4c5134..2cfb69b 100644
--- a/script/stellar_stat.sh
+++ b/script/python_stat.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
 
-/opt/MESA/bin/fieldstat_exporter.py local -j /opt/tsg/stellar/log/stellar.fs4 -l --clear-screen -e
+/opt/MESA/bin/fieldstat_exporter.py local -j /opt/tsg/stellar/log/stellar_fs4.json -l --clear-screen -e
diff --git a/script/shell_stat.sh b/script/shell_stat.sh
new file mode 100644
index 0000000..9590850
--- /dev/null
+++ b/script/shell_stat.sh
@@ -0,0 +1,99 @@
+#!/bin/bash +x
+
+#cat stellar_fs4.json |jq
+#[
+#  {
+#    "name": "stellar",
+#    "tags": {},
+#    "fields": {
+#      "dev_rx_pkts": 90099,
+#      "dev_rx_bytes": 63205423,
+#      "dev_tx_pkts": 90082,
+#      "dev_tx_bytes": 63194807,
+#      "keep_alive_pkts": 0,
+#      "keep_alive_bytes": 0,
+#      "raw_rx_pkts": 90099,
+#      "raw_rx_bytes": 63205423,
+#      "raw_tx_pkts": 90082,
+#      "raw_tx_bytes": 63194807,
+#      "ctrl_rx_pkts": 0,
+#      "ctrl_rx_bytes": 0,
+#      "ctrl_tx_pkts": 0,
+#      "ctrl_tx_bytes": 0,
+#      "tcp_sess_used": 480,
+#      "tcp_sess_opening": 0,
+#      "tcp_sess_active": 141,
+#      "tcp_sess_closing": 339,
+#      "tcp_sess_discard": 0,
+#      "tcp_sess_closed": 0,
+#      "udp_sess_used": 0,
+#      "udp_sess_opening": 0,
+#      "udp_sess_active": 0,
+#      "udp_sess_closing": 0,
+#      "udp_sess_discard": 0,
+#      "udp_sess_closed": 0,
+#      "tcp_sess_evicted": 0,
+#      "udp_sess_evicted": 0,
+#      "udp_pkts_nospace_bypass": 0,
+#      "tcp_pkts_nospace_bypass": 0,
+#      "tcp_pkts_nosess_bypass": 4769,
+#      "tcp_pkts_duped_bypass": 1796,
+#      "udp_pkts_duped_bypass": 382,
+#      "udp_pkts_evctd_bypass": 0,
+#      "tcp_seg_received": 49833,
+#      "tcp_seg_expired": 0,
+#      "tcp_seg_overlap": 3012,
+#      "tcp_seg_no_space": 36452,
+#      "tcp_seg_inorder": 6189,
+#      "tcp_seg_reorded": 218,
+#      "tcp_seg_buffered": 5967,
+#      "tcp_seg_released": 218
+#    },
+#    "timestamp_ms": 1713053113549
+#  }
+#]
+
+calculate() {
+    local curr_data=$1
+    local prev_data=$2
+
+    local fields=($(echo "$curr_data" | jq -r '.[].fields | to_entries | .[] | .key' | grep -v timestamp_ms))
+    local curr_ts=$(echo "$curr_data" | jq -r '.[].timestamp_ms')
+    local prev_ts=$(echo "$prev_data" | jq -r '.[].timestamp_ms')
+    local diff_ts=$((($curr_ts - $prev_ts) / 1000))
+    local seconds=$((curr_ts / 1000))
+    local buffer=()
+
+    local curr_fileds=$(echo "$curr_data" | jq -r '.[].fields' | grep -v timestamp_ms)
+    local prev_fileds=$(echo "$prev_data" | jq -r '.[].fields' | grep -v timestamp_ms)
+
+    buffer+=("====================================$(date -d "@$seconds" +"%Y-%m-%d %H:%M:%S")====================================\n")
+    buffer+=("$(printf "%-30s" Field)$(printf "%-20s" Sum)$(printf "%-20s" Speed)\n")
+    local result=()
+    for field in "${fields[@]}"; do
+        local curr_val=$(echo "$curr_fileds" | grep $field | awk '{print $2}' | sed 's/,//g')
+        local prev_val=$(echo "$prev_fileds" | grep $field | awk '{print $2}' | sed 's/,//g')
+        local diff_val=$((curr_val - prev_val))
+        local speed=0
+        if [ $diff_ts -eq 0 ]; then
+            speed=0
+        else
+            speed=$((diff_val / diff_ts))
+        fi
+        buffer+=("$(printf "%-30s" $field)$(printf "%-20s" $curr_val)$(printf "%-20s" $speed)\n")
+    done
+    buffer+=("===========================================================================================\n")
+    clear
+    echo -e "${buffer[@]}"
+}
+
+prev_data=""
+
+while true; do
+    curr_data=$(cat /opt/tsg/stellar/log/stellar_fs4.json)
+    if [ ! -z "$prev_data" ]; then
+        calculate "$curr_data" "$prev_data"
+    fi
+    prev_data="$curr_data"
+    sleep 1
+done
diff --git a/src/plugin/plugin_manager.cpp b/src/plugin/plugin_manager.cpp
index 3ec3105..83c3d5b 100644
--- a/src/plugin/plugin_manager.cpp
+++ b/src/plugin/plugin_manager.cpp
@@ -42,7 +42,7 @@ void plugin_manager_dispatch_session(struct plugin_manager *mgr, struct session
     struct tcp_segment *seg;
     enum session_state state = session_get_state(sess);
     enum session_type type = session_get_type(sess);
-    // PLUGIN_MANAGER_LOG_DEBUG("=> plugin dispatch session: %u %s %s %s", session_get_id(sess), session_get_tuple_str(sess), session_type_to_str(type), session_state_to_str(state));
+    PLUGIN_MANAGER_LOG_DEBUG("=> plugin dispatch session: %u %s %s %s", session_get_id(sess), session_get_tuple_str(sess), session_type_to_str(type), session_state_to_str(state));
     // session_print(sess);
 
     if (packet_is_ctrl(pkt))
diff --git a/src/session/session_manager.cpp b/src/session/session_manager.cpp
index 63ada99..1094bb6 100644
--- a/src/session/session_manager.cpp
+++ b/src/session/session_manager.cpp
@@ -1,3 +1,4 @@
+#include <time.h>
 #include <stdlib.h>
 #include <assert.h>
 
@@ -234,24 +235,47 @@ static inline bool before(uint32_t seq1, uint32_t seq2)
      return (int32_t)(seq1 - seq2) < 0;
 }
 
-static void tcp_clean(struct session *sess)
+static void tcp_clean(struct session_manager *mgr, struct session *sess)
 {
-     tcp_reassembly_free(sess->tcp_halfs[SESSION_DIRECTION_C2S].assembler);
-     tcp_reassembly_free(sess->tcp_halfs[SESSION_DIRECTION_S2C].assembler);
+     struct tcp_reassembly *c2s_ssembler = sess->tcp_halfs[SESSION_DIRECTION_C2S].assembler;
+     struct tcp_reassembly *s2c_ssembler = sess->tcp_halfs[SESSION_DIRECTION_S2C].assembler;
+     struct tcp_segment *seg;
+     if (c2s_ssembler)
+     {
+          while ((seg = tcp_reassembly_expire(c2s_ssembler, UINT64_MAX)))
+          {
+               session_inc_stat(sess, SESSION_DIRECTION_C2S, STAT_TCP_SEGS_RELEASED, 1);
+               session_inc_stat(sess, SESSION_DIRECTION_C2S, STAT_TCP_PLDS_RELEASED, seg->len);
+               mgr->stat.nr_tcp_seg_released++;
+               tcp_segment_free(seg);
+          }
+          tcp_reassembly_free(c2s_ssembler);
+     }
+     if (s2c_ssembler)
+     {
+          while ((seg = tcp_reassembly_expire(s2c_ssembler, UINT64_MAX)))
+          {
+               session_inc_stat(sess, SESSION_DIRECTION_S2C, STAT_TCP_SEGS_RELEASED, 1);
+               session_inc_stat(sess, SESSION_DIRECTION_S2C, STAT_TCP_PLDS_RELEASED, seg->len);
+               mgr->stat.nr_tcp_seg_released++;
+               tcp_segment_free(seg);
+          }
+          tcp_reassembly_free(s2c_ssembler);
+     }
 }
 
-static int tcp_init(struct session *sess, uint8_t tcp_reassembly_enable, uint64_t tcp_reassembly_max_timeout, uint64_t tcp_reassembly_max_segments)
+static int tcp_init(struct session_manager *mgr, struct session *sess)
 {
-     if (!tcp_reassembly_enable)
+     if (!mgr->opts.tcp_reassembly_enable)
      {
           return 0;
      }
 
-     sess->tcp_halfs[SESSION_DIRECTION_C2S].assembler = tcp_reassembly_new(tcp_reassembly_max_timeout, tcp_reassembly_max_segments);
-     sess->tcp_halfs[SESSION_DIRECTION_S2C].assembler = tcp_reassembly_new(tcp_reassembly_max_timeout, tcp_reassembly_max_segments);
+     sess->tcp_halfs[SESSION_DIRECTION_C2S].assembler = tcp_reassembly_new(mgr->opts.tcp_reassembly_max_timeout, mgr->opts.tcp_reassembly_max_segments);
+     sess->tcp_halfs[SESSION_DIRECTION_S2C].assembler = tcp_reassembly_new(mgr->opts.tcp_reassembly_max_timeout, mgr->opts.tcp_reassembly_max_segments);
      if (sess->tcp_halfs[SESSION_DIRECTION_C2S].assembler == NULL || sess->tcp_halfs[SESSION_DIRECTION_S2C].assembler == NULL)
      {
-          tcp_clean(sess);
+          tcp_clean(mgr, sess);
           return -1;
      }
 
@@ -479,15 +503,18 @@ static int duplicated_packet_bypass(struct session_manager *mgr, struct session
  * Session Manager
  ******************************************************************************/
 
-static void session_update(struct session *sess, enum session_state next_state, const struct packet *pkt, const struct tuple6 *key, enum session_direction dir, uint64_t now)
+static void session_update(struct session *sess, enum session_state next_state, const struct packet *pkt, const struct tuple6 *key, enum session_direction dir)
 {
+     struct timespec real;
+     clock_gettime(CLOCK_REALTIME, &real); // must be realtime
+
      if (session_get_state(sess) == SESSION_STATE_INIT)
      {
           session_set_id(sess, id_generator_alloc());
           session_set_tuple(sess, key);
           session_set_tuple_direction(sess, dir);
           tuple6_to_str(key, sess->tuple_str, sizeof(sess->tuple_str));
-          session_set_timestamp(sess, SESSION_TIMESTAMP_START, now);
+          session_set_timestamp(sess, SESSION_TIMESTAMP_START, real.tv_sec);
           switch (key->ip_proto)
           {
           case IPPROTO_TCP:
@@ -512,7 +539,7 @@ static void session_update(struct session *sess, enum session_state next_state,
 
      session_set_current_packet(sess, pkt);
      session_set_current_direction(sess, dir);
-     session_set_timestamp(sess, SESSION_TIMESTAMP_LAST, now);
+     session_set_timestamp(sess, SESSION_TIMESTAMP_LAST, real.tv_sec);
      session_set_state(sess, next_state);
 }
 
@@ -588,10 +615,10 @@ static struct session *session_manager_new_tcp_session(struct session_manager *m
      sess->mgr_stat = &mgr->stat;
 
      enum session_state next_state = session_transition_run(SESSION_STATE_INIT, TCP_SYN);
-     session_update(sess, next_state, pkt, key, dir, now);
+     session_update(sess, next_state, pkt, key, dir);
      session_transition_log(sess, SESSION_STATE_INIT, next_state, TCP_SYN);
 
-     if (tcp_init(sess, mgr->opts.tcp_reassembly_enable, mgr->opts.tcp_reassembly_max_timeout, mgr->opts.tcp_reassembly_max_segments) == -1)
+     if (tcp_init(mgr, sess) == -1)
      {
           assert(0);
           session_pool_push(mgr->sess_pool, sess);
@@ -634,7 +661,7 @@ static struct session *session_manager_new_udp_session(struct session_manager *m
 
      enum session_direction dir = identify_direction_by_port(ntohs(key->src_port), ntohs(key->dst_port));
      enum session_state next_state = session_transition_run(SESSION_STATE_INIT, UDP_DATA);
-     session_update(sess, next_state, pkt, key, dir, now);
+     session_update(sess, next_state, pkt, key, dir);
      session_transition_log(sess, SESSION_STATE_INIT, next_state, UDP_DATA);
 
      session_timer_update(mgr->sess_timer, sess, now + mgr->opts.udp_data_timeout);
@@ -663,7 +690,7 @@ static int session_manager_update_tcp_session(struct session_manager *mgr, struc
      enum session_state next_state = session_transition_run(curr_state, inputs);
 
      // update session
-     session_update(sess, next_state, pkt, key, dir, now);
+     session_update(sess, next_state, pkt, key, dir);
      session_transition_log(sess, curr_state, next_state, inputs);
 
      // update tcp
@@ -741,7 +768,7 @@ static int session_manager_update_udp_session(struct session_manager *mgr, struc
      enum session_direction dir = identify_direction_by_history(sess, key);
      enum session_state curr_state = session_get_state(sess);
      enum session_state next_state = session_transition_run(curr_state, UDP_DATA);
-     session_update(sess, next_state, pkt, key, dir, now);
+     session_update(sess, next_state, pkt, key, dir);
      session_transition_log(sess, curr_state, next_state, UDP_DATA);
 
      if (session_get_state(sess) == SESSION_STATE_DISCARD)
@@ -894,7 +921,7 @@ void session_manager_free_session(struct session_manager *mgr, struct session *s
           switch (session_get_type(sess))
           {
           case SESSION_TYPE_TCP:
-               tcp_clean(sess);
+               tcp_clean(mgr, sess);
                session_table_del(mgr->tcp_sess_table, session_get_tuple(sess));
                SESS_MGR_STAT_DEC(&mgr->stat, session_get_state(sess), tcp);
                mgr->stat.nr_tcp_sess_used--;
diff --git a/src/session/test/gtest_state_tcp_active_to_closing.cpp b/src/session/test/gtest_state_tcp_active_to_closing.cpp
index c35fa14..722c84e 100644
--- a/src/session/test/gtest_state_tcp_active_to_closing.cpp
+++ b/src/session/test/gtest_state_tcp_active_to_closing.cpp
@@ -126,8 +126,8 @@ TEST(TCP_ACTIVE_TO_CLOSING, BY_FIN_FIN)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -214,8 +214,8 @@ TEST(TCP_ACTIVE_TO_CLOSING, BY_C2S_RST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -302,8 +302,8 @@ TEST(TCP_ACTIVE_TO_CLOSING, BY_S2C_RST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -432,8 +432,8 @@ TEST(TCP_ACTIVE_TO_CLOSING, BY_C2S_HALF_CLOSED_TIMEOUT)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -513,8 +513,8 @@ TEST(TCP_ACTIVE_TO_CLOSING, BY_S2C_HALF_CLOSED_TIMEOUT)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
diff --git a/src/session/test/gtest_state_tcp_init_to_opening.cpp b/src/session/test/gtest_state_tcp_init_to_opening.cpp
index e1a2727..f7224d0 100644
--- a/src/session/test/gtest_state_tcp_init_to_opening.cpp
+++ b/src/session/test/gtest_state_tcp_init_to_opening.cpp
@@ -85,8 +85,8 @@ TEST(TCP_INIT_TO_OPENING, BY_SYN)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 1);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -164,8 +164,8 @@ TEST(TCP_INIT_TO_OPENING, BY_SYNACK)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 1);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) == NULL);
@@ -254,8 +254,8 @@ TEST(TCP_INIT_TO_OPENING, BY_SYN_SYNACK)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -355,8 +355,8 @@ TEST(TCP_INIT_TO_OPENING, BY_SYN_SYNACK_ACK)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -452,8 +452,8 @@ TEST(TCP_INIT_TO_OPENING, BY_SYN_RETRANSMISSION)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -550,8 +550,8 @@ TEST(TCP_INIT_TO_OPENING, BY_SYNACK_RETRANSMISSION)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) == NULL);
@@ -640,8 +640,8 @@ TEST(TCP_INIT_TO_OPENING, BY_C2S_ASMMETRIC)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -730,8 +730,8 @@ TEST(TCP_INIT_TO_OPENING, BY_S2C_ASMMETRIC)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) == NULL);
diff --git a/src/session/test/gtest_state_tcp_init_to_opening_to_active_to_closing_to_closed.cpp b/src/session/test/gtest_state_tcp_init_to_opening_to_active_to_closing_to_closed.cpp
index 980093b..e565011 100644
--- a/src/session/test/gtest_state_tcp_init_to_opening_to_active_to_closing_to_closed.cpp
+++ b/src/session/test/gtest_state_tcp_init_to_opening_to_active_to_closing_to_closed.cpp
@@ -81,8 +81,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 1);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -112,8 +112,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -143,8 +143,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -174,8 +174,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 4);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -205,8 +205,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 5);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -236,8 +236,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66 + 1354);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 6);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -267,8 +267,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66 + 1354 + 385);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 7);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -298,8 +298,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66 + 1354 + 385);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 8);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -329,8 +329,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66 + 1354 + 385);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 9);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -360,8 +360,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66 + 1354 + 385 + 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 10);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -391,8 +391,8 @@ TEST(TCP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING_TO_CLOSED, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 66 + 1354 + 385 + 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1 + 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1 + 1 + 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 11);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
diff --git a/src/session/test/gtest_state_tcp_opening_to_active.cpp b/src/session/test/gtest_state_tcp_opening_to_active.cpp
index 0229ef3..54cbcc0 100644
--- a/src/session/test/gtest_state_tcp_opening_to_active.cpp
+++ b/src/session/test/gtest_state_tcp_opening_to_active.cpp
@@ -95,8 +95,8 @@ TEST(TCP_OPENING_TO_ACTIVE, BY_SYN_C2S_DATA)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -185,8 +185,8 @@ TEST(TCP_OPENING_TO_ACTIVE, BY_SYNACK_S2C_DATA)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74 + 1354);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1 + 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) == NULL);
diff --git a/src/session/test/gtest_state_tcp_opening_to_closing.cpp b/src/session/test/gtest_state_tcp_opening_to_closing.cpp
index 2290fee..2cb9e24 100644
--- a/src/session/test/gtest_state_tcp_opening_to_closing.cpp
+++ b/src/session/test/gtest_state_tcp_opening_to_closing.cpp
@@ -107,8 +107,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_FIN_FIN)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -203,8 +203,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_C2S_RST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -299,8 +299,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_S2C_RST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -446,8 +446,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_HANDSHAKE_TIMEOUT)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -547,8 +547,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_DATA_TIMEOUT)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 74);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 3);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -637,8 +637,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_C2S_HALF_FIN)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1 + 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -726,8 +726,8 @@ TEST(TCP_OPENING_TO_CLOSING, BY_S2C_HALF_FIN)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 66);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
diff --git a/src/session/test/gtest_state_udp_init_to_opening_to_active_to_closing.cpp b/src/session/test/gtest_state_udp_init_to_opening_to_active_to_closing.cpp
index be890c3..7903552 100644
--- a/src/session/test/gtest_state_udp_init_to_opening_to_active_to_closing.cpp
+++ b/src/session/test/gtest_state_udp_init_to_opening_to_active_to_closing.cpp
@@ -80,8 +80,8 @@ TEST(UDP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 1);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -110,8 +110,8 @@ TEST(UDP_INIT_TO_OPENING_TO_ACTIVE_TO_CLOSING, TEST)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 550);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 2);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
diff --git a/src/session/test/gtest_state_udp_init_to_opening_to_closing.cpp b/src/session/test/gtest_state_udp_init_to_opening_to_closing.cpp
index 87a09cb..aaa85e1 100644
--- a/src/session/test/gtest_state_udp_init_to_opening_to_closing.cpp
+++ b/src/session/test/gtest_state_udp_init_to_opening_to_closing.cpp
@@ -85,8 +85,8 @@ TEST(UDP_INIT_TO_OPENING_TO_CLOSING, BY_C2S)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 1);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 0);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 1);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_C2S);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) != NULL);
@@ -165,8 +165,8 @@ TEST(UDP_INIT_TO_OPENING_TO_CLOSING, BY_S2C)
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_BYTES_RX) == 550);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_C2S, STAT_RAW_PKTS_RX) == 0);
     EXPECT_TRUE(session_get_stat(sess, SESSION_DIRECTION_S2C, STAT_RAW_PKTS_RX) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START) == 1);
-    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST) == 1);
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
+    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
     EXPECT_TRUE(session_get_current_packet(sess) == &pkt);
     EXPECT_TRUE(session_get_current_direction(sess) == SESSION_DIRECTION_S2C);
     EXPECT_TRUE(session_get_1st_packet(sess, SESSION_DIRECTION_C2S) == NULL);
diff --git a/src/stellar/stat.cpp b/src/stellar/stat.cpp
index df77946..de1264c 100644
--- a/src/stellar/stat.cpp
+++ b/src/stellar/stat.cpp
@@ -94,7 +94,7 @@ struct stellar_stat
 
 // python3 -m pip install prettytable
 // python3 -m pip install jinja2
-// /opt/MESA/bin/fieldstat_exporter.py local -j log/stellar.fs4 -e -l --clear-screen
+// /opt/MESA/bin/fieldstat_exporter.py local -j log/stellar_fs4.json -e -l --clear-screen
 struct stellar_stat *stellar_stat_new(uint16_t nr_thread)
 {
     struct stellar_stat *stat = (struct stellar_stat *)calloc(1, sizeof(struct stellar_stat));
@@ -135,19 +135,19 @@ struct stellar_stat *stellar_stat_new(uint16_t nr_thread)
     stat->ids.ctrl_tx_pkts = fieldstat_easy_register_counter(stat->fs, "ctrl_tx_pkts");
     stat->ids.ctrl_tx_bytes = fieldstat_easy_register_counter(stat->fs, "ctrl_tx_bytes");
     // TCP session
-    stat->ids.nr_tcp_sess_used = fieldstat_easy_register_counter(stat->fs, "tcp_sess_used");
-    stat->ids.nr_tcp_sess_opening = fieldstat_easy_register_counter(stat->fs, "tcp_sess_opening");
-    stat->ids.nr_tcp_sess_active = fieldstat_easy_register_counter(stat->fs, "tcp_sess_active");
-    stat->ids.nr_tcp_sess_closing = fieldstat_easy_register_counter(stat->fs, "tcp_sess_closing");
-    stat->ids.nr_tcp_sess_discard = fieldstat_easy_register_counter(stat->fs, "tcp_sess_discard");
-    stat->ids.nr_tcp_sess_closed = fieldstat_easy_register_counter(stat->fs, "tcp_sess_closed");
+    stat->ids.nr_tcp_sess_used = fieldstat_easy_register_counter(stat->fs, "curr_tcp_sess_used");
+    stat->ids.nr_tcp_sess_opening = fieldstat_easy_register_counter(stat->fs, "curr_tcp_sess_opening");
+    stat->ids.nr_tcp_sess_active = fieldstat_easy_register_counter(stat->fs, "curr_tcp_sess_active");
+    stat->ids.nr_tcp_sess_closing = fieldstat_easy_register_counter(stat->fs, "curr_tcp_sess_closing");
+    stat->ids.nr_tcp_sess_discard = fieldstat_easy_register_counter(stat->fs, "curr_tcp_sess_discard");
+    stat->ids.nr_tcp_sess_closed = fieldstat_easy_register_counter(stat->fs, "curr_tcp_sess_closed");
     // UDP session
-    stat->ids.nr_udp_sess_used = fieldstat_easy_register_counter(stat->fs, "udp_sess_used");
-    stat->ids.nr_udp_sess_opening = fieldstat_easy_register_counter(stat->fs, "udp_sess_opening");
-    stat->ids.nr_udp_sess_active = fieldstat_easy_register_counter(stat->fs, "udp_sess_active");
-    stat->ids.nr_udp_sess_closing = fieldstat_easy_register_counter(stat->fs, "udp_sess_closing");
-    stat->ids.nr_udp_sess_discard = fieldstat_easy_register_counter(stat->fs, "udp_sess_discard");
-    stat->ids.nr_udp_sess_closed = fieldstat_easy_register_counter(stat->fs, "udp_sess_closed");
+    stat->ids.nr_udp_sess_used = fieldstat_easy_register_counter(stat->fs, "curr_udp_sess_used");
+    stat->ids.nr_udp_sess_opening = fieldstat_easy_register_counter(stat->fs, "curr_udp_sess_opening");
+    stat->ids.nr_udp_sess_active = fieldstat_easy_register_counter(stat->fs, "curr_udp_sess_active");
+    stat->ids.nr_udp_sess_closing = fieldstat_easy_register_counter(stat->fs, "curr_udp_sess_closing");
+    stat->ids.nr_udp_sess_discard = fieldstat_easy_register_counter(stat->fs, "curr_udp_sess_discard");
+    stat->ids.nr_udp_sess_closed = fieldstat_easy_register_counter(stat->fs, "curr_udp_sess_closed");
     // Evicted session
     stat->ids.nr_tcp_sess_evicted = fieldstat_easy_register_counter(stat->fs, "tcp_sess_evicted");
     stat->ids.nr_udp_sess_evicted = fieldstat_easy_register_counter(stat->fs, "udp_sess_evicted");
@@ -320,10 +320,10 @@ void stellar_stat_output(struct stellar_stat *stat)
     fieldstat_easy_output(stat->fs, &buff, &len);
     if (buff)
     {
-        FILE *fp = fopen("/opt/tsg/stellar/log/stellar.fs4", "w+");
+        FILE *fp = fopen("/opt/tsg/stellar/log/stellar_fs4.json", "w+");
         if (fp == NULL)
         {
-            STAT_LOG_ERROR("failed to open file: %s, %s", "/opt/tsg/stellar/log/stellar.fs4", strerror(errno));
+            STAT_LOG_ERROR("failed to open file: %s, %s", "/opt/tsg/stellar/log/stellar_fs4.json", strerror(errno));
         }
         else
         {
diff --git a/src/timestamp/test/gtest_timestamp.cpp b/src/timestamp/test/gtest_timestamp.cpp
index 32f608f..758444d 100644
--- a/src/timestamp/test/gtest_timestamp.cpp
+++ b/src/timestamp/test/gtest_timestamp.cpp
@@ -21,7 +21,7 @@ TEST(TIMESTAMP, GET)
     printf("last_sec: %lu, last_msec: %lu\n", last_sec, last_msec);
     printf("curr_sec: %lu, curr_msec: %lu\n", curr_sec, curr_msec);
     EXPECT_TRUE(curr_sec == last_sec);
-    EXPECT_TRUE(curr_msec - last_msec >= 1 && curr_msec - last_msec <= 2);
+    EXPECT_TRUE(curr_msec - last_msec >= 1);
 
     usleep(1000 * 1000); // 1s
     timestamp_update();
@@ -33,7 +33,7 @@ TEST(TIMESTAMP, GET)
     printf("last_sec: %lu, last_msec: %lu\n", last_sec, last_msec);
     printf("curr_sec: %lu, curr_msec: %lu\n", curr_sec, curr_msec);
     EXPECT_TRUE(curr_sec - last_sec == 1);
-    EXPECT_TRUE(curr_msec - last_msec >= 1000 && curr_msec - last_msec <= 1001);
+    EXPECT_TRUE(curr_msec - last_msec >= 1000);
 }
 
 int main(int argc, char **argv)
diff --git a/src/timestamp/timestamp.cpp b/src/timestamp/timestamp.cpp
index 4cac82a..72bd37c 100644
--- a/src/timestamp/timestamp.cpp
+++ b/src/timestamp/timestamp.cpp
@@ -6,6 +6,16 @@
 // 1 ms = 1000 us
 // 1 us = 1000 ns
 
+/*
+ * The maximum number of seconds that can be stored in the time_t value is 2147483647 –- a little over 68 years.
+ *
+ * struct timespec
+ * {
+ *     time_t tv_sec; // seconds
+ *     long tv_nsec;  // nanoseconds
+ * };
+ */
+
 struct timestamp
 {
     struct timespec ts;
@@ -18,6 +28,17 @@ struct timestamp
 
 void timestamp_update()
 {
+    /*
+     * CLOCK_MONOTONIC
+     *
+     * On Linux, that point corresponds to the number of sec‐
+     * onds that the system has been running since it was booted.
+     *
+     * The CLOCK_MONOTONIC clock is not affected by discontinuous
+     * jumps in the system time (e.g., if the system administrator
+     * manually changes the clock), but is affected by the incremen‐
+     * tal adjustments performed by adjtime(3) and NTP.
+     */
     clock_gettime(CLOCK_MONOTONIC, &g_timestamp.ts);
 
     uint64_t current_timestamp_ms = g_timestamp.ts.tv_sec * 1000 + g_timestamp.ts.tv_nsec / 1000000;
@@ -32,7 +53,6 @@ uint64_t timestamp_get_sec()
     return ATOMIC_READ(&g_timestamp.ts_in_sec);
 }
 
-// TODO uint64_t 溢出
 uint64_t timestamp_get_msec()
 {
     return ATOMIC_READ(&g_timestamp.ts_in_msec);