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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_launch.h>
55 #include <rte_per_lcore.h>
56 #include <rte_lcore.h>
57 #include <rte_atomic.h>
58 #include <rte_branch_prediction.h>
59 #include <rte_mempool.h>
61 #include <rte_interrupts.h>
63 #include <rte_ether.h>
64 #include <rte_ethdev.h>
68 #include <rte_string_fns.h>
73 /* hardcoded configuration (for now) */
74 static unsigned cfg_n_flows = 1024;
75 static uint32_t cfg_ip_src = IPv4(10, 254, 0, 0);
76 static uint32_t cfg_ip_dst = IPv4(10, 253, 0, 0);
77 static uint16_t cfg_udp_src = 1000;
78 static uint16_t cfg_udp_dst = 1001;
79 static struct ether_addr cfg_ether_src =
80 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x00 }};
81 static struct ether_addr cfg_ether_dst =
82 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x01 }};
84 #define IP_DEFTTL 64 /* from RFC 1340. */
85 #define IP_VERSION 0x40
86 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
87 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
89 static inline uint16_t
90 ip_sum(const unaligned_uint16_t *hdr, int hdr_len)
98 sum = (sum & 0xFFFF) + (sum >> 16);
103 sum = (sum & 0xFFFF) + (sum >> 16);
109 * Multi-flow generation mode.
111 * We originate a bunch of flows (varying destination IP addresses), and
112 * terminate receive traffic. Received traffic is simply discarded, but we
113 * still do so in order to maintain traffic statistics.
116 pkt_burst_flow_gen(struct fwd_stream *fs)
118 unsigned pkt_size = tx_pkt_length - 4; /* Adjust FCS */
119 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
120 struct rte_mempool *mbp;
121 struct rte_mbuf *pkt;
122 struct ether_hdr *eth_hdr;
123 struct ipv4_hdr *ip_hdr;
124 struct udp_hdr *udp_hdr;
125 uint16_t vlan_tci, vlan_tci_outer;
132 uint64_t tx_offloads;
133 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
136 uint64_t core_cycles;
138 static int next_flow = 0;
140 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
141 start_tsc = rte_rdtsc();
144 /* Receive a burst of packets and discard them. */
145 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
147 fs->rx_packets += nb_rx;
149 for (i = 0; i < nb_rx; i++)
150 rte_pktmbuf_free(pkts_burst[i]);
152 mbp = current_fwd_lcore()->mbp;
153 vlan_tci = ports[fs->tx_port].tx_vlan_id;
154 vlan_tci_outer = ports[fs->tx_port].tx_vlan_id_outer;
156 tx_offloads = ports[fs->tx_port].dev_conf.txmode.offloads;
157 if (tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT)
158 ol_flags = PKT_TX_VLAN_PKT;
159 if (tx_offloads & DEV_TX_OFFLOAD_QINQ_INSERT)
160 ol_flags |= PKT_TX_QINQ_PKT;
161 if (tx_offloads & DEV_TX_OFFLOAD_MACSEC_INSERT)
162 ol_flags |= PKT_TX_MACSEC;
164 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
165 pkt = rte_mbuf_raw_alloc(mbp);
169 pkt->data_len = pkt_size;
172 /* Initialize Ethernet header. */
173 eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
174 ether_addr_copy(&cfg_ether_dst, ð_hdr->d_addr);
175 ether_addr_copy(&cfg_ether_src, ð_hdr->s_addr);
176 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
178 /* Initialize IP header. */
179 ip_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
180 memset(ip_hdr, 0, sizeof(*ip_hdr));
181 ip_hdr->version_ihl = IP_VHL_DEF;
182 ip_hdr->type_of_service = 0;
183 ip_hdr->fragment_offset = 0;
184 ip_hdr->time_to_live = IP_DEFTTL;
185 ip_hdr->next_proto_id = IPPROTO_UDP;
186 ip_hdr->packet_id = 0;
187 ip_hdr->src_addr = rte_cpu_to_be_32(cfg_ip_src);
188 ip_hdr->dst_addr = rte_cpu_to_be_32(cfg_ip_dst +
190 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size -
192 ip_hdr->hdr_checksum = ip_sum((unaligned_uint16_t *)ip_hdr,
195 /* Initialize UDP header. */
196 udp_hdr = (struct udp_hdr *)(ip_hdr + 1);
197 udp_hdr->src_port = rte_cpu_to_be_16(cfg_udp_src);
198 udp_hdr->dst_port = rte_cpu_to_be_16(cfg_udp_dst);
199 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
200 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_size -
204 pkt->pkt_len = pkt_size;
205 pkt->ol_flags = ol_flags;
206 pkt->vlan_tci = vlan_tci;
207 pkt->vlan_tci_outer = vlan_tci_outer;
208 pkt->l2_len = sizeof(struct ether_hdr);
209 pkt->l3_len = sizeof(struct ipv4_hdr);
210 pkts_burst[nb_pkt] = pkt;
212 next_flow = (next_flow + 1) % cfg_n_flows;
215 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
219 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
221 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
222 rte_delay_us(burst_tx_delay_time);
223 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
224 &pkts_burst[nb_tx], nb_rx - nb_tx);
227 fs->tx_packets += nb_tx;
229 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
230 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
232 if (unlikely(nb_tx < nb_pkt)) {
233 /* Back out the flow counter. */
234 next_flow -= (nb_pkt - nb_tx);
235 while (next_flow < 0)
236 next_flow += cfg_n_flows;
239 rte_pktmbuf_free(pkts_burst[nb_tx]);
240 } while (++nb_tx < nb_pkt);
242 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
243 end_tsc = rte_rdtsc();
244 core_cycles = (end_tsc - start_tsc);
245 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
249 struct fwd_engine flow_gen_engine = {
250 .fwd_mode_name = "flowgen",
251 .port_fwd_begin = NULL,
252 .port_fwd_end = NULL,
253 .packet_fwd = pkt_burst_flow_gen,