diff --git a/config.ini b/config.ini
index 06708ed2d..4a96776c7 100644
--- a/config.ini
+++ b/config.ini
@@ -93,7 +93,7 @@ gateway=192.168.1.1
 # Multi virtual IPv4/IPv6 net addr, Optional parameters.
 #	`vip_ifname`: default `f-stack-x`
 #	`vip_addr`: Separated by semicolons, MAX number 64;
-				Only support netmask 255.255.255.255, broadcast x.x.x.255 now, hard code in `ff_veth_setvaddr`.
+#		    Only support netmask 255.255.255.255, broadcast x.x.x.255 now, hard code in `ff_veth_setvaddr`.
 #	`vip_addr6`: Separated by semicolons, MAX number 64.
 #	`vip_prefix_len`: All addr6 use the same prefix now, default 64.
 #vip_ifname=lo0
diff --git a/doc/F-Stack_Build_Guide.md b/doc/F-Stack_Build_Guide.md
index 9d70b97f7..41810febe 100644
--- a/doc/F-Stack_Build_Guide.md
+++ b/doc/F-Stack_Build_Guide.md
@@ -65,7 +65,7 @@ $ make
 
 ## Compile dpdk in virtual machine
 
-- f-stack/dpdk/lib/librte_eal/linuxapp/igb_uio/igb_uio.c line 279:
+- f-stack/dpdk/kernel/linux/igb_uio/igb_uio.c line 274:
 ```
 
 -   if (pci_intx_mask_supported(udev->pdev)) {
diff --git a/lib/ff_dpdk_if.c b/lib/ff_dpdk_if.c
index 241110c9b..5a104d8f9 100644
--- a/lib/ff_dpdk_if.c
+++ b/lib/ff_dpdk_if.c
@@ -77,6 +77,7 @@ static int numa_on;
 
 static unsigned idle_sleep;
 static unsigned pkt_tx_delay;
+static uint64_t usr_cb_tsc;
 
 static struct rte_timer freebsd_clock;
 
@@ -1281,12 +1282,14 @@ process_packets(uint16_t port_id, uint16_t queue_id, struct rte_mbuf **bufs,
         uint16_t len = rte_pktmbuf_data_len(rtem);
 
         if (!pkts_from_ring) {
-            ff_traffic.rx_packets++;
-            ff_traffic.rx_bytes += len;
+            ff_traffic.rx_packets += rtem->nb_segs;
+            ff_traffic.rx_bytes += rte_pktmbuf_pkt_len(rtem);
         }
 
         if (!pkts_from_ring && packet_dispatcher) {
+            uint64_t cur_tsc = rte_rdtsc();
             int ret = (*packet_dispatcher)(data, &len, queue_id, nb_queues);
+            usr_cb_tsc += rte_rdtsc() - cur_tsc;
             if (ret == FF_DISPATCH_RESPONSE) {
                 rte_pktmbuf_pkt_len(rtem) = rte_pktmbuf_data_len(rtem) = len;
 
@@ -1399,7 +1402,7 @@ process_dispatch_ring(uint16_t port_id, uint16_t queue_id,
         process_packets(port_id, queue_id, pkts_burst, nb_rb, ctx, 1);
     }
 
-    return 0;
+    return nb_rb;
 }
 
 static inline void
@@ -1844,6 +1847,7 @@ main_loop(void *arg)
         idle = 1;
         sys_tsc = 0;
         usr_tsc = 0;
+        usr_cb_tsc = 0;
 
         /*
          * TX burst queue drain
@@ -1880,7 +1884,7 @@ main_loop(void *arg)
             }
 #endif
 
-            process_dispatch_ring(port_id, queue_id, pkts_burst, ctx);
+            idle &= !process_dispatch_ring(port_id, queue_id, pkts_burst, ctx);
 
             nb_rx = rte_eth_rx_burst(port_id, queue_id, pkts_burst,
                 MAX_PKT_BURST);
@@ -1925,12 +1929,13 @@ main_loop(void *arg)
             end_tsc = idle_sleep_tsc;
         }
 
+        usr_tsc = usr_cb_tsc;
         if (usch_tsc == cur_tsc) {
-            usr_tsc = idle_sleep_tsc - div_tsc;
+            usr_tsc += idle_sleep_tsc - div_tsc;
         }
 
         if (!idle) {
-            sys_tsc = div_tsc - cur_tsc;
+            sys_tsc = div_tsc - cur_tsc - usr_cb_tsc;
             ff_top_status.sys_tsc += sys_tsc;
         }