diff options
Diffstat (limited to 'app/test-pmd/macfwd-retry.c')
| -rw-r--r-- | app/test-pmd/macfwd-retry.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/app/test-pmd/macfwd-retry.c b/app/test-pmd/macfwd-retry.c new file mode 100644 index 00000000..3a96b3df --- /dev/null +++ b/app/test-pmd/macfwd-retry.c @@ -0,0 +1,164 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stdarg.h> +#include <string.h> +#include <stdio.h> +#include <errno.h> +#include <stdint.h> +#include <unistd.h> +#include <inttypes.h> + +#include <sys/queue.h> +#include <sys/stat.h> + +#include <rte_common.h> +#include <rte_byteorder.h> +#include <rte_log.h> +#include <rte_debug.h> +#include <rte_cycles.h> +#include <rte_memory.h> +#include <rte_memcpy.h> +#include <rte_memzone.h> +#include <rte_launch.h> +#include <rte_eal.h> +#include <rte_per_lcore.h> +#include <rte_lcore.h> +#include <rte_atomic.h> +#include <rte_branch_prediction.h> +#include <rte_ring.h> +#include <rte_memory.h> +#include <rte_mempool.h> +#include <rte_mbuf.h> +#include <rte_interrupts.h> +#include <rte_pci.h> +#include <rte_ether.h> +#include <rte_ethdev.h> +#include <rte_ip.h> +#include <rte_string_fns.h> + +#include "testpmd.h" + +#define BURST_TX_WAIT_US 10 +#define BURST_TX_RETRIES 5 + +/* + * Global variables that control number of retires and + * timeout (in us) between retires. + */ +uint32_t burst_tx_delay_time = BURST_TX_WAIT_US; +uint32_t burst_tx_retry_num = BURST_TX_RETRIES; + +/* + * Forwarding of packets in MAC mode with a wait and retry on TX to reduce packet loss. + * Change the source and the destination Ethernet addressed of packets + * before forwarding them. + */ +static void +pkt_burst_mac_retry_forward(struct fwd_stream *fs) +{ + struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; + struct rte_mbuf *mb; + struct ether_hdr *eth_hdr; + uint32_t retry; + uint16_t nb_rx; + uint16_t nb_tx; + uint16_t i; +#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(); +#endif + + /* + * Receive a burst of packets and forward them. + */ + nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, + nb_pkt_per_burst); + if (unlikely(nb_rx == 0)) + return; + +#ifdef RTE_TEST_PMD_RECORD_BURST_STATS + fs->rx_burst_stats.pkt_burst_spread[nb_rx]++; +#endif + fs->rx_packets += nb_rx; + for (i = 0; i < nb_rx; i++) { + mb = pkts_burst[i]; + eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *); + ether_addr_copy(&peer_eth_addrs[fs->peer_addr], + ð_hdr->d_addr); + ether_addr_copy(&ports[fs->tx_port].eth_addr, + ð_hdr->s_addr); + } + nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx); + + /* + * If not all packets have been TX'd then wait and retry. + */ + if (unlikely(nb_tx < nb_rx)) { + for (retry = 0; retry < burst_tx_retry_num; retry++) { + rte_delay_us(burst_tx_delay_time); + nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue, + &pkts_burst[nb_tx], nb_rx - nb_tx); + if (nb_tx == nb_rx) + break; + } + } + + fs->tx_packets += nb_tx; +#ifdef RTE_TEST_PMD_RECORD_BURST_STATS + fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; +#endif + if (unlikely(nb_tx < nb_rx)) { + fs->fwd_dropped += (nb_rx - nb_tx); + do { + 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 +} + +struct fwd_engine mac_retry_fwd_engine = { + .fwd_mode_name = "mac_retry", + .port_fwd_begin = NULL, + .port_fwd_end = NULL, + .packet_fwd = pkt_burst_mac_retry_forward, +}; |