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43 #include <sys/queue.h>
46 #include <rte_common.h>
47 #include <rte_byteorder.h>
49 #include <rte_debug.h>
50 #include <rte_cycles.h>
51 #include <rte_memory.h>
52 #include <rte_memcpy.h>
53 #include <rte_memzone.h>
54 #include <rte_launch.h>
56 #include <rte_per_lcore.h>
57 #include <rte_lcore.h>
58 #include <rte_atomic.h>
59 #include <rte_branch_prediction.h>
61 #include <rte_memory.h>
62 #include <rte_mempool.h>
64 #include <rte_interrupts.h>
66 #include <rte_ether.h>
67 #include <rte_ethdev.h>
71 #include <rte_string_fns.h>
75 /* hardcoded configuration (for now) */
76 static unsigned cfg_n_flows = 1024;
77 static unsigned cfg_pkt_size = 300;
78 static uint32_t cfg_ip_src = IPv4(10, 254, 0, 0);
79 static uint32_t cfg_ip_dst = IPv4(10, 253, 0, 0);
80 static uint16_t cfg_udp_src = 1000;
81 static uint16_t cfg_udp_dst = 1001;
82 static struct ether_addr cfg_ether_src =
83 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x00 }};
84 static struct ether_addr cfg_ether_dst =
85 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x01 }};
87 #define IP_DEFTTL 64 /* from RFC 1340. */
88 #define IP_VERSION 0x40
89 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
90 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
92 static inline struct rte_mbuf *
93 tx_mbuf_alloc(struct rte_mempool *mp)
97 m = __rte_mbuf_raw_alloc(mp);
98 __rte_mbuf_sanity_check_raw(m, 0);
103 static inline uint16_t
104 ip_sum(const uint16_t *hdr, int hdr_len)
111 if (sum & 0x80000000)
112 sum = (sum & 0xFFFF) + (sum >> 16);
117 sum = (sum & 0xFFFF) + (sum >> 16);
123 * Multi-flow generation mode.
125 * We originate a bunch of flows (varying destination IP addresses), and
126 * terminate receive traffic. Received traffic is simply discarded, but we
127 * still do so in order to maintain traffic statistics.
130 pkt_burst_flow_gen(struct fwd_stream *fs)
132 unsigned pkt_size = cfg_pkt_size - 4; /* Adjust FCS */
133 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
134 struct rte_mempool *mbp;
135 struct rte_mbuf *pkt;
136 struct ether_hdr *eth_hdr;
137 struct ipv4_hdr *ip_hdr;
138 struct udp_hdr *udp_hdr;
145 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
148 uint64_t core_cycles;
150 static int next_flow = 0;
152 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
153 start_tsc = rte_rdtsc();
156 /* Receive a burst of packets and discard them. */
157 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
159 fs->rx_packets += nb_rx;
161 for (i = 0; i < nb_rx; i++)
162 rte_pktmbuf_free(pkts_burst[i]);
164 mbp = current_fwd_lcore()->mbp;
165 vlan_tci = ports[fs->tx_port].tx_vlan_id;
166 ol_flags = ports[fs->tx_port].tx_ol_flags;
168 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
169 pkt = tx_mbuf_alloc(mbp);
173 pkt->data_len = pkt_size;
176 /* Initialize Ethernet header. */
177 eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
178 ether_addr_copy(&cfg_ether_dst, ð_hdr->d_addr);
179 ether_addr_copy(&cfg_ether_src, ð_hdr->s_addr);
180 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
182 /* Initialize IP header. */
183 ip_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
184 memset(ip_hdr, 0, sizeof(*ip_hdr));
185 ip_hdr->version_ihl = IP_VHL_DEF;
186 ip_hdr->type_of_service = 0;
187 ip_hdr->fragment_offset = 0;
188 ip_hdr->time_to_live = IP_DEFTTL;
189 ip_hdr->next_proto_id = IPPROTO_UDP;
190 ip_hdr->packet_id = 0;
191 ip_hdr->src_addr = rte_cpu_to_be_32(cfg_ip_src);
192 ip_hdr->dst_addr = rte_cpu_to_be_32(cfg_ip_dst +
194 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size -
196 ip_hdr->hdr_checksum = ip_sum((uint16_t *)ip_hdr,
199 /* Initialize UDP header. */
200 udp_hdr = (struct udp_hdr *)(ip_hdr + 1);
201 udp_hdr->src_port = rte_cpu_to_be_16(cfg_udp_src);
202 udp_hdr->dst_port = rte_cpu_to_be_16(cfg_udp_dst);
203 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
204 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_size -
208 pkt->pkt_len = pkt_size;
209 pkt->ol_flags = ol_flags;
210 pkt->vlan_tci = vlan_tci;
211 pkt->l2_len = sizeof(struct ether_hdr);
212 pkt->l3_len = sizeof(struct ipv4_hdr);
213 pkts_burst[nb_pkt] = pkt;
215 next_flow = (next_flow + 1) % cfg_n_flows;
218 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
219 fs->tx_packets += nb_tx;
221 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
222 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
224 if (unlikely(nb_tx < nb_pkt)) {
225 /* Back out the flow counter. */
226 next_flow -= (nb_pkt - nb_tx);
227 while (next_flow < 0)
228 next_flow += cfg_n_flows;
231 rte_pktmbuf_free(pkts_burst[nb_tx]);
232 } while (++nb_tx < nb_pkt);
234 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
235 end_tsc = rte_rdtsc();
236 core_cycles = (end_tsc - start_tsc);
237 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
241 struct fwd_engine flow_gen_engine = {
242 .fwd_mode_name = "flowgen",
243 .port_fwd_begin = NULL,
244 .port_fwd_end = NULL,
245 .packet_fwd = pkt_burst_flow_gen,