From: Daniel Mrzyglod Date: Thu, 27 Nov 2014 16:33:41 +0000 (+0000) Subject: bond: unit tests for mode 5 X-Git-Tag: spdx-start~10015 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0c8396e6d786768cccc0078ae96231997141a4e5;p=dpdk.git bond: unit tests for mode 5 This Patch add unit tests for mode 5 - tlb - to the oders link bonding unit tests. Signed-off-by: Daniel Mrzyglod Acked-by: Declan Doherty --- diff --git a/app/test/test_link_bonding.c b/app/test/test_link_bonding.c index 93449aff2f..f62c4901df 100644 --- a/app/test/test_link_bonding.c +++ b/app/test/test_link_bonding.c @@ -41,7 +41,7 @@ #include #include #include - +#include #include #include #include @@ -3856,6 +3856,498 @@ testsuite_teardown(void) return remove_slaves_and_stop_bonded_device(); } +static int +test_tlb_tx_burst(void) +{ + int i, burst_size, nb_tx; + uint64_t nb_tx2 = 0; + struct rte_mbuf *pkt_burst[MAX_PKT_BURST]; + struct rte_eth_stats port_stats[32]; + uint64_t sum_ports_opackets = 0, all_bond_opackets = 0, all_bond_obytes = 0; + uint16_t pktlen; + uint64_t floor_obytes = 0, ceiling_obytes = 0; + + TEST_ASSERT_SUCCESS(initialize_bonded_device_with_slaves + (BONDING_MODE_ADAPTIVE_TRANSMIT_LOAD_BALANCING, 1, 3, 1), + "Failed to initialise bonded device"); + + burst_size = 20 * test_params->bonded_slave_count; + + TEST_ASSERT(burst_size < MAX_PKT_BURST, + "Burst size specified is greater than supported.\n"); + + + /* Generate 400000 test bursts in 2s of packets to transmit */ + for (i = 0; i < 400000; i++) { + /*test two types of mac src own(bonding) and others */ + if (i % 2 == 0) { + initialize_eth_header(test_params->pkt_eth_hdr, + (struct ether_addr *)src_mac, + (struct ether_addr *)dst_mac_0, 0, 0); + } else { + initialize_eth_header(test_params->pkt_eth_hdr, + (struct ether_addr *)test_params->default_slave_mac, + (struct ether_addr *)dst_mac_0, 0, 0); + } + pktlen = initialize_udp_header(test_params->pkt_udp_hdr, src_port, + dst_port_0, 16); + pktlen = initialize_ipv4_header(test_params->pkt_ipv4_hdr, src_addr, + dst_addr_0, pktlen); + generate_packet_burst(test_params->mbuf_pool, pkt_burst, + test_params->pkt_eth_hdr, 0, test_params->pkt_ipv4_hdr, + 1, test_params->pkt_udp_hdr, burst_size, 60, 1); + /* Send burst on bonded port */ + nb_tx = rte_eth_tx_burst(test_params->bonded_port_id, 0, pkt_burst, + burst_size); + nb_tx2 += nb_tx; + + TEST_ASSERT_EQUAL(nb_tx, burst_size, + "number of packet not equal burst size"); + + rte_delay_us(5); + } + + + /* Verify bonded port tx stats */ + rte_eth_stats_get(test_params->bonded_port_id, &port_stats[0]); + + all_bond_opackets = port_stats[0].opackets; + all_bond_obytes = port_stats[0].obytes; + + TEST_ASSERT_EQUAL(port_stats[0].opackets, (uint64_t)nb_tx2, + "Bonded Port (%d) opackets value (%u) not as expected (%d)\n", + test_params->bonded_port_id, (unsigned int)port_stats[0].opackets, + burst_size); + + + /* Verify slave ports tx stats */ + for (i = 0; i < test_params->bonded_slave_count; i++) { + rte_eth_stats_get(test_params->slave_port_ids[i], &port_stats[i]); + sum_ports_opackets += port_stats[i].opackets; + } + + TEST_ASSERT_EQUAL(sum_ports_opackets, (uint64_t)all_bond_opackets, + "Total packets sent by slaves is not equal to packets sent by bond interface"); + /* distribution of packets on each slave within +/- 10% of the expected value. */ + for (i = 0; i < test_params->bonded_slave_count; i++) { + + floor_obytes = (all_bond_obytes*90)/(test_params->bonded_slave_count*100); + ceiling_obytes = (all_bond_obytes*110)/(test_params->bonded_slave_count*100); + TEST_ASSERT(port_stats[i].obytes >= floor_obytes && + port_stats[i].obytes <= ceiling_obytes, + "Distribution is not even"); + } + /* Put all slaves down and try and transmit */ + for (i = 0; i < test_params->bonded_slave_count; i++) { + virtual_ethdev_simulate_link_status_interrupt( + test_params->slave_port_ids[i], 0); + } + + /* Send burst on bonded port */ + nb_tx = rte_eth_tx_burst(test_params->bonded_port_id, 0, pkt_burst, + burst_size); + TEST_ASSERT_EQUAL(nb_tx, 0, " bad number of packet in burst"); + + /* Clean ugit checkout masterp and remove slaves from bonded device */ + return remove_slaves_and_stop_bonded_device(); +} + +#define TEST_ADAPTIVE_TRANSMIT_LOAD_BALANCING_RX_BURST_SLAVE_COUNT (4) + +static int +test_tlb_rx_burst(void) +{ + struct rte_mbuf *gen_pkt_burst[MAX_PKT_BURST] = { NULL }; + struct rte_mbuf *rx_pkt_burst[MAX_PKT_BURST] = { NULL }; + + struct rte_eth_stats port_stats; + + int primary_port; + + uint16_t i, j, nb_rx, burst_size = 17; + + /* Initialize bonded device with 4 slaves in transmit load balancing mode */ + TEST_ASSERT_SUCCESS(initialize_bonded_device_with_slaves( + BONDING_MODE_ADAPTIVE_TRANSMIT_LOAD_BALANCING, + TEST_ADAPTIVE_TRANSMIT_LOAD_BALANCING_RX_BURST_SLAVE_COUNT, 1, 1), + "Failed to initialize bonded device"); + + + primary_port = rte_eth_bond_primary_get(test_params->bonded_port_id); + TEST_ASSERT(primary_port >= 0, + "failed to get primary slave for bonded port (%d)", + test_params->bonded_port_id); + + for (i = 0; i < test_params->bonded_slave_count; i++) { + /* Generate test bursts of packets to transmit */ + TEST_ASSERT_EQUAL(generate_test_burst( + &gen_pkt_burst[0], burst_size, 0, 1, 0, 0, 0), burst_size, + "burst generation failed"); + + /* Add rx data to slave */ + virtual_ethdev_add_mbufs_to_rx_queue(test_params->slave_port_ids[i], + &gen_pkt_burst[0], burst_size); + + /* Call rx burst on bonded device */ + nb_rx = rte_eth_rx_burst(test_params->bonded_port_id, 0, + &rx_pkt_burst[0], MAX_PKT_BURST); + + TEST_ASSERT_EQUAL(nb_rx, burst_size, "rte_eth_rx_burst failed\n"); + + if (test_params->slave_port_ids[i] == primary_port) { + /* Verify bonded device rx count */ + rte_eth_stats_get(test_params->bonded_port_id, &port_stats); + TEST_ASSERT_EQUAL(port_stats.ipackets, (uint64_t)burst_size, + "Bonded Port (%d) ipackets value (%u) not as expected (%d)\n", + test_params->bonded_port_id, + (unsigned int)port_stats.ipackets, burst_size); + + /* Verify bonded slave devices rx count */ + for (j = 0; j < test_params->bonded_slave_count; j++) { + rte_eth_stats_get(test_params->slave_port_ids[j], &port_stats); + if (i == j) { + TEST_ASSERT_EQUAL(port_stats.ipackets, (uint64_t)burst_size, + "Slave Port (%d) ipackets value (%u) not as expected (%d)\n", + test_params->slave_port_ids[i], + (unsigned int)port_stats.ipackets, burst_size); + } else { + TEST_ASSERT_EQUAL(port_stats.ipackets, (uint64_t)0, + "Slave Port (%d) ipackets value (%u) not as expected (%d)\n", + test_params->slave_port_ids[i], + (unsigned int)port_stats.ipackets, 0); + } + } + } else { + for (j = 0; j < test_params->bonded_slave_count; j++) { + rte_eth_stats_get(test_params->slave_port_ids[j], &port_stats); + TEST_ASSERT_EQUAL(port_stats.ipackets, (uint64_t)0, + "Slave Port (%d) ipackets value (%u) not as expected (%d)\n", + test_params->slave_port_ids[i], + (unsigned int)port_stats.ipackets, 0); + } + } + + /* free mbufs */ + for (i = 0; i < burst_size; i++) + rte_pktmbuf_free(rx_pkt_burst[i]); + + /* reset bonded device stats */ + rte_eth_stats_reset(test_params->bonded_port_id); + } + + /* Clean up and remove slaves from bonded device */ + return remove_slaves_and_stop_bonded_device(); +} + +static int +test_tlb_verify_promiscuous_enable_disable(void) +{ + int i, primary_port, promiscuous_en; + + /* Initialize bonded device with 4 slaves in transmit load balancing mode */ + TEST_ASSERT_SUCCESS( initialize_bonded_device_with_slaves( + BONDING_MODE_ADAPTIVE_TRANSMIT_LOAD_BALANCING, 0, 4, 1), + "Failed to initialize bonded device"); + + primary_port = rte_eth_bond_primary_get(test_params->bonded_port_id); + TEST_ASSERT(primary_port >= 0, + "failed to get primary slave for bonded port (%d)", + test_params->bonded_port_id); + + rte_eth_promiscuous_enable(test_params->bonded_port_id); + + promiscuous_en = rte_eth_promiscuous_get(test_params->bonded_port_id); + TEST_ASSERT_EQUAL(promiscuous_en, (int)1, + "Port (%d) promiscuous mode not enabled\n", + test_params->bonded_port_id); + for (i = 0; i < test_params->bonded_slave_count; i++) { + promiscuous_en = rte_eth_promiscuous_get( + test_params->slave_port_ids[i]); + if (primary_port == test_params->slave_port_ids[i]) { + TEST_ASSERT_EQUAL(promiscuous_en, (int)1, + "Port (%d) promiscuous mode not enabled\n", + test_params->bonded_port_id); + } else { + TEST_ASSERT_EQUAL(promiscuous_en, (int)0, + "Port (%d) promiscuous mode enabled\n", + test_params->bonded_port_id); + } + + } + + rte_eth_promiscuous_disable(test_params->bonded_port_id); + + promiscuous_en = rte_eth_promiscuous_get(test_params->bonded_port_id); + TEST_ASSERT_EQUAL(promiscuous_en, (int)0, + "Port (%d) promiscuous mode not disabled\n", + test_params->bonded_port_id); + + for (i = 0; i < test_params->bonded_slave_count; i++) { + promiscuous_en = rte_eth_promiscuous_get( + test_params->slave_port_ids[i]); + TEST_ASSERT_EQUAL(promiscuous_en, (int)0, + "slave port (%d) promiscuous mode not disabled\n", + test_params->slave_port_ids[i]); + } + + /* Clean up and remove slaves from bonded device */ + return remove_slaves_and_stop_bonded_device(); +} + +static int +test_tlb_verify_mac_assignment(void) +{ + struct ether_addr read_mac_addr, expected_mac_addr_0, expected_mac_addr_1; + + rte_eth_macaddr_get(test_params->slave_port_ids[0], &expected_mac_addr_0); + rte_eth_macaddr_get(test_params->slave_port_ids[1], &expected_mac_addr_1); + + /* Initialize bonded device with 2 slaves in active backup mode */ + TEST_ASSERT_SUCCESS(initialize_bonded_device_with_slaves( + BONDING_MODE_ADAPTIVE_TRANSMIT_LOAD_BALANCING, 0, 2, 1), + "Failed to initialize bonded device"); + + /* Verify that bonded MACs is that of first slave and that the other slave + * MAC hasn't been changed */ + rte_eth_macaddr_get(test_params->bonded_port_id, &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_0, &read_mac_addr, + sizeof(read_mac_addr)), + "bonded port (%d) mac address not set to that of primary port", + test_params->bonded_port_id); + + rte_eth_macaddr_get(test_params->slave_port_ids[0], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_0, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not set to that of primary port", + test_params->slave_port_ids[0]); + + rte_eth_macaddr_get(test_params->slave_port_ids[1], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_1, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not as expected", + test_params->slave_port_ids[1]); + + /* change primary and verify that MAC addresses haven't changed */ + TEST_ASSERT_EQUAL(rte_eth_bond_primary_set(test_params->bonded_port_id, + test_params->slave_port_ids[1]), 0, + "Failed to set bonded port (%d) primary port to (%d)", + test_params->bonded_port_id, test_params->slave_port_ids[1]); + + rte_eth_macaddr_get(test_params->bonded_port_id, &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_0, &read_mac_addr, + sizeof(read_mac_addr)), + "bonded port (%d) mac address not set to that of primary port", + test_params->bonded_port_id); + + rte_eth_macaddr_get(test_params->slave_port_ids[0], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_0, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not set to that of primary port", + test_params->slave_port_ids[0]); + + rte_eth_macaddr_get(test_params->slave_port_ids[1], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_1, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not as expected", + test_params->slave_port_ids[1]); + + /* stop / start bonded device and verify that primary MAC address is + * propagated to bonded device and slaves */ + + rte_eth_dev_stop(test_params->bonded_port_id); + + TEST_ASSERT_SUCCESS(rte_eth_dev_start(test_params->bonded_port_id), + "Failed to start device"); + + rte_eth_macaddr_get(test_params->bonded_port_id, &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_1, &read_mac_addr, + sizeof(read_mac_addr)), + "bonded port (%d) mac address not set to that of primary port", + test_params->bonded_port_id); + + rte_eth_macaddr_get(test_params->slave_port_ids[0], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_0, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not as expected", + test_params->slave_port_ids[0]); + + rte_eth_macaddr_get(test_params->slave_port_ids[1], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_1, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not set to that of primary port", + test_params->slave_port_ids[1]); + + + /* Set explicit MAC address */ + TEST_ASSERT_SUCCESS(rte_eth_bond_mac_address_set( + test_params->bonded_port_id, (struct ether_addr *)bonded_mac), + "failed to set MAC addres"); + + rte_eth_macaddr_get(test_params->bonded_port_id, &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&bonded_mac, &read_mac_addr, + sizeof(read_mac_addr)), + "bonded port (%d) mac address not set to that of bonded port", + test_params->bonded_port_id); + + rte_eth_macaddr_get(test_params->slave_port_ids[0], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&expected_mac_addr_0, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not as expected", + test_params->slave_port_ids[0]); + + rte_eth_macaddr_get(test_params->slave_port_ids[1], &read_mac_addr); + TEST_ASSERT_SUCCESS(memcmp(&bonded_mac, &read_mac_addr, + sizeof(read_mac_addr)), + "slave port (%d) mac address not set to that of bonded port", + test_params->slave_port_ids[1]); + + /* Clean up and remove slaves from bonded device */ + return remove_slaves_and_stop_bonded_device(); +} + +static int +test_tlb_verify_slave_link_status_change_failover(void) +{ + struct rte_mbuf *pkt_burst[TEST_ADAPTIVE_TRANSMIT_LOAD_BALANCING_RX_BURST_SLAVE_COUNT][MAX_PKT_BURST]; + struct rte_mbuf *rx_pkt_burst[MAX_PKT_BURST] = { NULL }; + struct rte_eth_stats port_stats; + + uint8_t slaves[RTE_MAX_ETHPORTS]; + + int i, j, burst_size, slave_count, primary_port; + + burst_size = 21; + + memset(pkt_burst, 0, sizeof(pkt_burst)); + + + + /* Initialize bonded device with 4 slaves in round robin mode */ + TEST_ASSERT_SUCCESS(initialize_bonded_device_with_slaves( + BONDING_MODE_ADAPTIVE_TRANSMIT_LOAD_BALANCING, 0, + TEST_ADAPTIVE_TRANSMIT_LOAD_BALANCING_RX_BURST_SLAVE_COUNT, 1), + "Failed to initialize bonded device with slaves"); + + /* Verify Current Slaves Count /Active Slave Count is */ + slave_count = rte_eth_bond_slaves_get(test_params->bonded_port_id, slaves, + RTE_MAX_ETHPORTS); + TEST_ASSERT_EQUAL(slave_count, 4, + "Number of slaves (%d) is not as expected (%d).\n", + slave_count, 4); + + slave_count = rte_eth_bond_active_slaves_get(test_params->bonded_port_id, + slaves, RTE_MAX_ETHPORTS); + TEST_ASSERT_EQUAL(slave_count, (int)4, + "Number of slaves (%d) is not as expected (%d).\n", + slave_count, 4); + + primary_port = rte_eth_bond_primary_get(test_params->bonded_port_id); + TEST_ASSERT_EQUAL(primary_port, test_params->slave_port_ids[0], + "Primary port not as expected"); + + /* Bring 2 slaves down and verify active slave count */ + virtual_ethdev_simulate_link_status_interrupt( + test_params->slave_port_ids[1], 0); + virtual_ethdev_simulate_link_status_interrupt( + test_params->slave_port_ids[3], 0); + + TEST_ASSERT_EQUAL(rte_eth_bond_active_slaves_get( + test_params->bonded_port_id, slaves, RTE_MAX_ETHPORTS), 2, + "Number of active slaves (%d) is not as expected (%d).", + slave_count, 2); + + virtual_ethdev_simulate_link_status_interrupt( + test_params->slave_port_ids[1], 1); + virtual_ethdev_simulate_link_status_interrupt( + test_params->slave_port_ids[3], 1); + + + /* Bring primary port down, verify that active slave count is 3 and primary + * has changed */ + virtual_ethdev_simulate_link_status_interrupt( + test_params->slave_port_ids[0], 0); + + TEST_ASSERT_EQUAL(rte_eth_bond_active_slaves_get( + test_params->bonded_port_id, slaves, RTE_MAX_ETHPORTS), 3, + "Number of active slaves (%d) is not as expected (%d).", + slave_count, 3); + + primary_port = rte_eth_bond_primary_get(test_params->bonded_port_id); + TEST_ASSERT_EQUAL(primary_port, test_params->slave_port_ids[2], + "Primary port not as expected"); + rte_delay_us(500000); + /* Verify that pkts are sent on new primary slave */ + for (i = 0; i < 4; i++) { + TEST_ASSERT_EQUAL(generate_test_burst( + &pkt_burst[0][0], burst_size, 0, 1, 0, 0, 0), burst_size, + "generate_test_burst failed\n"); + TEST_ASSERT_EQUAL(rte_eth_tx_burst( + test_params->bonded_port_id, 0, &pkt_burst[0][0], burst_size), burst_size, + "rte_eth_tx_burst failed\n"); + rte_delay_us(11000); + } + + rte_eth_stats_get(test_params->slave_port_ids[2], &port_stats); + TEST_ASSERT_NOT_EQUAL(port_stats.opackets, (int8_t)0, + "(%d) port_stats.opackets not as expected\n", + test_params->slave_port_ids[2]); + + rte_eth_stats_get(test_params->slave_port_ids[0], &port_stats); + TEST_ASSERT_EQUAL(port_stats.opackets, (int8_t)0, + "(%d) port_stats.opackets not as expected\n", + test_params->slave_port_ids[0]); + + rte_eth_stats_get(test_params->slave_port_ids[1], &port_stats); + TEST_ASSERT_NOT_EQUAL(port_stats.opackets, (int8_t)0, + "(%d) port_stats.opackets not as expected\n", + test_params->slave_port_ids[1]); + + rte_eth_stats_get(test_params->slave_port_ids[3], &port_stats); + TEST_ASSERT_NOT_EQUAL(port_stats.opackets, (int8_t)0, + "(%d) port_stats.opackets not as expected\n", + test_params->slave_port_ids[3]); + + + /* Generate packet burst for testing */ + + for (i = 0; i < TEST_ADAPTIVE_TRANSMIT_LOAD_BALANCING_RX_BURST_SLAVE_COUNT; i++) { + if (generate_test_burst(&pkt_burst[i][0], burst_size, 0, 1, 0, 0, 0) != + burst_size) + return -1; + + virtual_ethdev_add_mbufs_to_rx_queue( + test_params->slave_port_ids[i], &pkt_burst[i][0], burst_size); + } + + if (rte_eth_rx_burst(test_params->bonded_port_id, 0, rx_pkt_burst, + MAX_PKT_BURST) != burst_size) { + printf("rte_eth_rx_burst\n"); + return -1; + + } + + /* Verify bonded device rx count */ + rte_eth_stats_get(test_params->bonded_port_id, &port_stats); + TEST_ASSERT_EQUAL(port_stats.ipackets, (uint64_t)burst_size, + "(%d) port_stats.ipackets not as expected\n", + test_params->bonded_port_id); + + /* free mbufs */ + + for (i = 0; i < TEST_ADAPTIVE_TRANSMIT_LOAD_BALANCING_RX_BURST_SLAVE_COUNT; i++) { + for (j = 0; j < MAX_PKT_BURST; j++) { + if (pkt_burst[i][j] != NULL) { + rte_pktmbuf_free(pkt_burst[i][j]); + pkt_burst[i][j] = NULL; + } + } + } + + + /* Clean up and remove slaves from bonded device */ + return remove_slaves_and_stop_bonded_device(); +} + static struct unit_test_suite link_bonding_test_suite = { .suite_name = "Link Bonding Unit Test Suite", @@ -3909,6 +4401,11 @@ static struct unit_test_suite link_bonding_test_suite = { TEST_CASE(test_balance_verify_promiscuous_enable_disable), TEST_CASE(test_balance_verify_mac_assignment), TEST_CASE(test_balance_verify_slave_link_status_change_behaviour), + TEST_CASE(test_tlb_tx_burst), + TEST_CASE(test_tlb_rx_burst), + TEST_CASE(test_tlb_verify_mac_assignment), + TEST_CASE(test_tlb_verify_promiscuous_enable_disable), + TEST_CASE(test_tlb_verify_slave_link_status_change_failover), #ifdef RTE_MBUF_REFCNT TEST_CASE(test_broadcast_tx_burst), TEST_CASE(test_broadcast_tx_burst_slave_tx_fail), diff --git a/app/test/virtual_pmd.c b/app/test/virtual_pmd.c index e7be98bbfd..ade6cb0b7b 100644 --- a/app/test/virtual_pmd.c +++ b/app/test/virtual_pmd.c @@ -359,16 +359,18 @@ virtual_ethdev_tx_burst_success(void *queue, struct rte_mbuf **bufs, struct rte_eth_dev *vrtl_eth_dev; struct virtual_ethdev_private *dev_private; - + uint64_t obytes = 0; int i; + for (i = 0; i < nb_pkts; i++) + obytes += rte_pktmbuf_pkt_len(bufs[i]); vrtl_eth_dev = &rte_eth_devices[tx_q->port_id]; dev_private = vrtl_eth_dev->data->dev_private; if (vrtl_eth_dev->data->dev_link.link_status) { /* increment opacket count */ dev_private->eth_stats.opackets += nb_pkts; - + dev_private->eth_stats.obytes += obytes; /* free packets in burst */ for (i = 0; i < nb_pkts; i++) rte_pktmbuf_free(bufs[i]);