[dpdk-dev] [PATCH] app/testpmd: add profiling for Rx/Tx burst routines

Viacheslav Ovsiienko viacheslavo at mellanox.com
Wed Jun 26 14:48:37 CEST 2019


There is the testpmd configuration option called
RTE_TEST_PMD_RECORD_CORE_CYCLES, if this one is turned on
the testpmd application measures the CPU clocks spent
within forwarding loop. This time is the sum of execution
times of rte_eth_rx_burst(), rte_eth_tx_burst(), rte_delay_us(),
 rte_pktmbuf_free() and so on, depending on fwd mode set.

While debugging and performance optimization of datapath
burst routines tt would be useful to see the pure execution
times of these ones. It is proposed to add separated profiling
options:

CONFIG_RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
    enables gathering profiling data for transmit datapath,
    ticks spent within rte_eth_tx_burst() routine

CONFIG_RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
    enables gathering profiling data for receive datapath,
    ticks spent within rte_eth_rx_burst() routine

Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
---
 RFC: http://patches.dpdk.org/patch/53704/
---
 app/test-pmd/csumonly.c                 | 25 ++++++++++-----------
 app/test-pmd/flowgen.c                  | 25 +++++++++++----------
 app/test-pmd/icmpecho.c                 | 26 ++++++++++-----------
 app/test-pmd/iofwd.c                    | 24 ++++++++++----------
 app/test-pmd/macfwd.c                   | 24 +++++++++++---------
 app/test-pmd/macswap.c                  | 26 +++++++++++----------
 app/test-pmd/rxonly.c                   | 17 +++++---------
 app/test-pmd/softnicfwd.c               | 24 ++++++++++----------
 app/test-pmd/testpmd.c                  | 32 ++++++++++++++++++++++++++
 app/test-pmd/testpmd.h                  | 40 +++++++++++++++++++++++++++++++++
 app/test-pmd/txonly.c                   | 23 +++++++++----------
 config/common_base                      |  2 ++
 doc/guides/testpmd_app_ug/build_app.rst | 17 ++++++++++++++
 13 files changed, 197 insertions(+), 108 deletions(-)

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index e1cb7fb..e449ae2 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -717,19 +717,19 @@ struct simple_gre_hdr {
 	uint16_t nb_segments = 0;
 	int ret;
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
 #endif
-
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/* receive a burst of packet */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 				 nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	if (unlikely(nb_rx == 0))
 		return;
 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
@@ -989,8 +989,10 @@ struct simple_gre_hdr {
 		printf("Preparing packet burst to transmit failed: %s\n",
 				rte_strerror(rte_errno));
 
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
 			nb_prep);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 
 	/*
 	 * Retry if necessary
@@ -999,8 +1001,10 @@ struct simple_gre_hdr {
 		retry = 0;
 		while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&tx_pkts_burst[nb_tx], nb_rx - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 	fs->tx_packets += nb_tx;
@@ -1017,12 +1021,7 @@ struct simple_gre_hdr {
 			rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_rx);
 	}
-
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine csum_fwd_engine = {
diff --git a/app/test-pmd/flowgen.c b/app/test-pmd/flowgen.c
index ade6fe5..2b98637 100644
--- a/app/test-pmd/flowgen.c
+++ b/app/test-pmd/flowgen.c
@@ -130,20 +130,21 @@
 	uint16_t i;
 	uint32_t retry;
 	uint64_t tx_offloads;
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
-#endif
 	static int next_flow = 0;
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
+#endif
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/* Receive a burst of packets and discard them. */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 				 nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	fs->rx_packets += nb_rx;
 
 	for (i = 0; i < nb_rx; i++)
@@ -212,7 +213,9 @@
 		next_flow = (next_flow + 1) % cfg_n_flows;
 	}
 
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 	/*
 	 * Retry if necessary
 	 */
@@ -220,8 +223,10 @@
 		retry = 0;
 		while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&pkts_burst[nb_tx], nb_rx - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 	fs->tx_packets += nb_tx;
@@ -239,11 +244,7 @@
 			rte_pktmbuf_free(pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_pkt);
 	}
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine flow_gen_engine = {
diff --git a/app/test-pmd/icmpecho.c b/app/test-pmd/icmpecho.c
index 2d359c9..f2a6195 100644
--- a/app/test-pmd/icmpecho.c
+++ b/app/test-pmd/icmpecho.c
@@ -293,21 +293,22 @@
 	uint32_t cksum;
 	uint8_t  i;
 	int l2_len;
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
-#endif
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
+#endif
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/*
 	 * First, receive a burst of packets.
 	 */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 				 nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	if (unlikely(nb_rx == 0))
 		return;
 
@@ -492,8 +493,10 @@
 
 	/* Send back ICMP echo replies, if any. */
 	if (nb_replies > 0) {
+		TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 		nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst,
 					 nb_replies);
+		TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		/*
 		 * Retry if necessary
 		 */
@@ -502,10 +505,12 @@
 			while (nb_tx < nb_replies &&
 					retry++ < burst_tx_retry_num) {
 				rte_delay_us(burst_tx_delay_time);
+				TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 				nb_tx += rte_eth_tx_burst(fs->tx_port,
 						fs->tx_queue,
 						&pkts_burst[nb_tx],
 						nb_replies - nb_tx);
+				TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 			}
 		}
 		fs->tx_packets += nb_tx;
@@ -519,12 +524,7 @@
 			} while (++nb_tx < nb_replies);
 		}
 	}
-
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine icmp_echo_engine = {
diff --git a/app/test-pmd/iofwd.c b/app/test-pmd/iofwd.c
index 9dce76e..dc66a88 100644
--- a/app/test-pmd/iofwd.c
+++ b/app/test-pmd/iofwd.c
@@ -51,21 +51,21 @@
 	uint16_t nb_tx;
 	uint32_t retry;
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
 #endif
-
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/*
 	 * Receive a burst of packets and forward them.
 	 */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue,
 			pkts_burst, nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	if (unlikely(nb_rx == 0))
 		return;
 	fs->rx_packets += nb_rx;
@@ -73,8 +73,10 @@
 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 	fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
 #endif
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 			pkts_burst, nb_rx);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 	/*
 	 * Retry if necessary
 	 */
@@ -82,8 +84,10 @@
 		retry = 0;
 		while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&pkts_burst[nb_tx], nb_rx - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 	fs->tx_packets += nb_tx;
@@ -96,11 +100,7 @@
 			rte_pktmbuf_free(pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_rx);
 	}
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine io_fwd_engine = {
diff --git a/app/test-pmd/macfwd.c b/app/test-pmd/macfwd.c
index d2ebb11..58168b6 100644
--- a/app/test-pmd/macfwd.c
+++ b/app/test-pmd/macfwd.c
@@ -56,21 +56,23 @@
 	uint16_t i;
 	uint64_t ol_flags = 0;
 	uint64_t tx_offloads;
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
+
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
 #endif
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
 #endif
 
 	/*
 	 * Receive a burst of packets and forward them.
 	 */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 				 nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	if (unlikely(nb_rx == 0))
 		return;
 
@@ -103,7 +105,9 @@
 		mb->vlan_tci = txp->tx_vlan_id;
 		mb->vlan_tci_outer = txp->tx_vlan_id_outer;
 	}
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 	/*
 	 * Retry if necessary
 	 */
@@ -111,8 +115,10 @@
 		retry = 0;
 		while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&pkts_burst[nb_tx], nb_rx - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 
@@ -126,11 +132,7 @@
 			rte_pktmbuf_free(pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_rx);
 	}
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine mac_fwd_engine = {
diff --git a/app/test-pmd/macswap.c b/app/test-pmd/macswap.c
index 71af916..b22acdb 100644
--- a/app/test-pmd/macswap.c
+++ b/app/test-pmd/macswap.c
@@ -86,21 +86,22 @@
 	uint16_t nb_rx;
 	uint16_t nb_tx;
 	uint32_t retry;
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
-#endif
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
+#endif
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/*
 	 * Receive a burst of packets and forward them.
 	 */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 				 nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	if (unlikely(nb_rx == 0))
 		return;
 
@@ -112,7 +113,10 @@
 
 	do_macswap(pkts_burst, nb_rx, txp);
 
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
+
 	/*
 	 * Retry if necessary
 	 */
@@ -120,8 +124,10 @@
 		retry = 0;
 		while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&pkts_burst[nb_tx], nb_rx - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 	fs->tx_packets += nb_tx;
@@ -134,11 +140,7 @@
 			rte_pktmbuf_free(pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_rx);
 	}
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine mac_swap_engine = {
diff --git a/app/test-pmd/rxonly.c b/app/test-pmd/rxonly.c
index 5c65fc4..d1da357 100644
--- a/app/test-pmd/rxonly.c
+++ b/app/test-pmd/rxonly.c
@@ -50,19 +50,18 @@
 	uint16_t nb_rx;
 	uint16_t i;
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
-
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/*
 	 * Receive a burst of packets.
 	 */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 				 nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	if (unlikely(nb_rx == 0))
 		return;
 
@@ -73,11 +72,7 @@
 	for (i = 0; i < nb_rx; i++)
 		rte_pktmbuf_free(pkts_burst[i]);
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 struct fwd_engine rx_only_engine = {
diff --git a/app/test-pmd/softnicfwd.c b/app/test-pmd/softnicfwd.c
index 94e6669..9b2b0e6 100644
--- a/app/test-pmd/softnicfwd.c
+++ b/app/test-pmd/softnicfwd.c
@@ -87,35 +87,39 @@ struct tm_hierarchy {
 	uint16_t nb_tx;
 	uint32_t retry;
 
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
 #endif
-
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 	/*  Packets Receive */
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue,
 			pkts_burst, nb_pkt_per_burst);
+	TEST_PMD_CORE_CYC_RX_ADD(fs, start_rx_tsc);
 	fs->rx_packets += nb_rx;
 
 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 	fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
 #endif
 
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 			pkts_burst, nb_rx);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 
 	/* Retry if necessary */
 	if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
 		retry = 0;
 		while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&pkts_burst[nb_tx], nb_rx - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 	fs->tx_packets += nb_tx;
@@ -130,11 +134,7 @@ struct tm_hierarchy {
 			rte_pktmbuf_free(pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_rx);
 	}
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 static void
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 0dd47b3..b9cdc2e 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1506,6 +1506,12 @@ struct extmem_param {
 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 	uint64_t fwd_cycles = 0;
 #endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
+	uint64_t rx_cycles = 0;
+#endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
+	uint64_t tx_cycles = 0;
+#endif
 	uint64_t total_recv = 0;
 	uint64_t total_xmit = 0;
 	struct rte_port *port;
@@ -1536,6 +1542,12 @@ struct extmem_param {
 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 		fwd_cycles += fs->core_cycles;
 #endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
+		rx_cycles += fs->core_rx_cycles;
+#endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
+		tx_cycles += fs->core_tx_cycles;
+#endif
 	}
 	for (i = 0; i < cur_fwd_config.nb_fwd_ports; i++) {
 		uint8_t j;
@@ -1671,6 +1683,20 @@ struct extmem_param {
 		       (unsigned int)(fwd_cycles / total_recv),
 		       fwd_cycles, total_recv);
 #endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
+	if (total_recv > 0)
+		printf("\n  rx CPU cycles/packet=%u (total cycles="
+		       "%"PRIu64" / total RX packets=%"PRIu64")\n",
+		       (unsigned int)(rx_cycles / total_recv),
+		       rx_cycles, total_recv);
+#endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
+	if (total_xmit > 0)
+		printf("\n  tx CPU cycles/packet=%u (total cycles="
+		       "%"PRIu64" / total TX packets=%"PRIu64")\n",
+		       (unsigned int)(tx_cycles / total_xmit),
+		       tx_cycles, total_xmit);
+#endif
 }
 
 void
@@ -1701,6 +1727,12 @@ struct extmem_param {
 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 		fs->core_cycles = 0;
 #endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
+		fs->core_rx_cycles = 0;
+#endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
+		fs->core_tx_cycles = 0;
+#endif
 	}
 }
 
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index e3a6f7c..d4890d4 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -130,12 +130,52 @@ struct fwd_stream {
 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
 	uint64_t     core_cycles; /**< used for RX and TX processing */
 #endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
+	uint64_t     core_tx_cycles; /**< used for tx_burst processing */
+#endif
+#ifdef RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
+	uint64_t     core_rx_cycles; /**< used for rx_burst processing */
+#endif
 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 	struct pkt_burst_stats rx_burst_stats;
 	struct pkt_burst_stats tx_burst_stats;
 #endif
 };
 
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+#define TEST_PMD_CORE_CYC_TX_START(a) {a = rte_rdtsc(); }
+#else
+#define TEST_PMD_CORE_CYC_TX_START(a)
+#endif
+
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES) || \
+	defined(RTE_TEST_PMD_RECORD_CORE_RX_CYCLES)
+#define TEST_PMD_CORE_CYC_RX_START(a) {a = rte_rdtsc(); }
+#else
+#define TEST_PMD_CORE_CYC_RX_START(a)
+#endif
+
+#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
+#define TEST_PMD_CORE_CYC_FWD_ADD(fs, s) \
+{uint64_t end_tsc = rte_rdtsc(); fs->core_cycles += end_tsc - (s); }
+#else
+#define TEST_PMD_CORE_CYC_FWD_ADD(fs, s)
+#endif
+
+#ifdef RTE_TEST_PMD_RECORD_CORE_TX_CYCLES
+#define TEST_PMD_CORE_CYC_TX_ADD(fs, s) \
+{uint64_t end_tsc = rte_rdtsc(); fs->core_tx_cycles += end_tsc - (s); }
+#else
+#define TEST_PMD_CORE_CYC_TX_ADD(fs, s)
+#endif
+
+#ifdef RTE_TEST_PMD_RECORD_CORE_RX_CYCLES
+#define TEST_PMD_CORE_CYC_RX_ADD(fs, s) \
+{uint64_t end_tsc = rte_rdtsc(); fs->core_rx_cycles += end_tsc - (s); }
+#else
+#define TEST_PMD_CORE_CYC_RX_ADD(fs, s)
+#endif
+
 /** Descriptor for a single flow. */
 struct port_flow {
 	struct port_flow *next; /**< Next flow in list. */
diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c
index 10d641a..f08dffe 100644
--- a/app/test-pmd/txonly.c
+++ b/app/test-pmd/txonly.c
@@ -241,16 +241,16 @@
 	uint32_t retry;
 	uint64_t ol_flags = 0;
 	uint64_t tx_offloads;
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	uint64_t start_tsc;
-	uint64_t end_tsc;
-	uint64_t core_cycles;
+#if defined(RTE_TEST_PMD_RECORD_CORE_TX_CYCLES)
+	uint64_t start_tx_tsc;
+#endif
+#if defined(RTE_TEST_PMD_RECORD_CORE_CYCLES)
+	uint64_t start_rx_tsc;
 #endif
 
 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	start_tsc = rte_rdtsc();
+	TEST_PMD_CORE_CYC_RX_START(start_rx_tsc);
 #endif
-
 	mbp = current_fwd_lcore()->mbp;
 	txp = &ports[fs->tx_port];
 	tx_offloads = txp->dev_conf.txmode.offloads;
@@ -302,7 +302,9 @@
 	if (nb_pkt == 0)
 		return;
 
+	TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 	nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
+	TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 	/*
 	 * Retry if necessary
 	 */
@@ -310,8 +312,10 @@
 		retry = 0;
 		while (nb_tx < nb_pkt && retry++ < burst_tx_retry_num) {
 			rte_delay_us(burst_tx_delay_time);
+			TEST_PMD_CORE_CYC_TX_START(start_tx_tsc);
 			nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
 					&pkts_burst[nb_tx], nb_pkt - nb_tx);
+			TEST_PMD_CORE_CYC_TX_ADD(fs, start_tx_tsc);
 		}
 	}
 	fs->tx_packets += nb_tx;
@@ -334,12 +338,7 @@
 			rte_pktmbuf_free(pkts_burst[nb_tx]);
 		} while (++nb_tx < nb_pkt);
 	}
-
-#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
-	end_tsc = rte_rdtsc();
-	core_cycles = (end_tsc - start_tsc);
-	fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
-#endif
+	TEST_PMD_CORE_CYC_FWD_ADD(fs, start_rx_tsc);
 }
 
 static void
diff --git a/config/common_base b/config/common_base
index 5cb73a7..5ab189d 100644
--- a/config/common_base
+++ b/config/common_base
@@ -1003,6 +1003,8 @@ CONFIG_RTE_PROC_INFO=n
 #
 CONFIG_RTE_TEST_PMD=y
 CONFIG_RTE_TEST_PMD_RECORD_CORE_CYCLES=n
+CONFIG_RTE_TEST_PMD_RECORD_CORE_RX_CYCLES=n
+CONFIG_RTE_TEST_PMD_RECORD_CORE_TX_CYCLES=n
 CONFIG_RTE_TEST_PMD_RECORD_BURST_STATS=n
 
 #
diff --git a/doc/guides/testpmd_app_ug/build_app.rst b/doc/guides/testpmd_app_ug/build_app.rst
index d1ca9f3..661f0c6 100644
--- a/doc/guides/testpmd_app_ug/build_app.rst
+++ b/doc/guides/testpmd_app_ug/build_app.rst
@@ -21,6 +21,23 @@ The basic compilation steps are:
 
         export RTE_TARGET=x86_64-native-linux-gcc
 
+#.  Edit the desired conditional options in $RTE_SDK/config/common_base (optional):
+
+    *  ``CONFIG_RTE_TEST_PMD_RECORD_CORE_TX_CYCLES``
+
+       Enables gathering profiling data for transmit datapath,
+       counts the ticks spent within rte_eth_tx_burst() routine.
+
+    *  ``CONFIG_RTE_TEST_PMD_RECORD_CORE_RX_CYCLES``
+
+       Enables gathering profiling data for receive datapath,
+       counts ticks spent within rte_eth_rx_burst() routine.
+
+    *  ``CONFIG_RTE_TEST_PMD_RECORD_CORE_CYCLES``
+
+       Enables gathering profiling data for forwarding routine
+       in general.
+
 #.  Build the application:
 
     .. code-block:: console
-- 
1.8.3.1



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