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42 #include <sys/queue.h>
45 #include <rte_common.h>
46 #include <rte_byteorder.h>
48 #include <rte_debug.h>
49 #include <rte_cycles.h>
50 #include <rte_memory.h>
51 #include <rte_memzone.h>
52 #include <rte_launch.h>
54 #include <rte_per_lcore.h>
55 #include <rte_lcore.h>
56 #include <rte_atomic.h>
57 #include <rte_branch_prediction.h>
59 #include <rte_memory.h>
60 #include <rte_memcpy.h>
61 #include <rte_mempool.h>
63 #include <rte_interrupts.h>
65 #include <rte_ether.h>
66 #include <rte_ethdev.h>
67 #include <rte_string_fns.h>
72 * Forwarding of packets in I/O mode.
73 * Forward packets "as-is".
74 * This is the fastest possible forwarding operation, as it does not access
78 pkt_burst_io_forward(struct fwd_stream *fs)
80 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
83 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
89 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
90 start_tsc = rte_rdtsc();
94 * Receive a burst of packets and forward them.
96 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
98 if (unlikely(nb_rx == 0))
101 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
102 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
104 fs->rx_packets += nb_rx;
105 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
106 fs->tx_packets += nb_tx;
107 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
108 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
110 if (unlikely(nb_tx < nb_rx)) {
111 fs->fwd_dropped += (nb_rx - nb_tx);
113 rte_pktmbuf_free(pkts_burst[nb_tx]);
114 } while (++nb_tx < nb_rx);
116 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
117 end_tsc = rte_rdtsc();
118 core_cycles = (end_tsc - start_tsc);
119 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
123 struct fwd_engine io_fwd_engine = {
124 .fwd_mode_name = "io",
125 .port_fwd_begin = NULL,
126 .port_fwd_end = NULL,
127 .packet_fwd = pkt_burst_io_forward,