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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>
55 #include <rte_tailq.h>
57 #include <rte_per_lcore.h>
58 #include <rte_lcore.h>
59 #include <rte_atomic.h>
60 #include <rte_branch_prediction.h>
62 #include <rte_memory.h>
63 #include <rte_mempool.h>
65 #include <rte_interrupts.h>
67 #include <rte_ether.h>
68 #include <rte_ethdev.h>
72 #include <rte_string_fns.h>
76 /* hardcoded configuration (for now) */
77 static unsigned cfg_n_flows = 1024;
78 static unsigned cfg_pkt_size = 300;
79 static uint32_t cfg_ip_src = IPv4(10, 254, 0, 0);
80 static uint32_t cfg_ip_dst = IPv4(10, 253, 0, 0);
81 static uint16_t cfg_udp_src = 1000;
82 static uint16_t cfg_udp_dst = 1001;
83 static struct ether_addr cfg_ether_src =
84 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x00 }};
85 static struct ether_addr cfg_ether_dst =
86 {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x01 }};
88 #define IP_DEFTTL 64 /* from RFC 1340. */
89 #define IP_VERSION 0x40
90 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
91 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
93 static inline struct rte_mbuf *
94 tx_mbuf_alloc(struct rte_mempool *mp)
98 m = __rte_mbuf_raw_alloc(mp);
99 __rte_mbuf_sanity_check_raw(m, 0);
104 static inline uint16_t
105 ip_sum(const uint16_t *hdr, int hdr_len)
112 if (sum & 0x80000000)
113 sum = (sum & 0xFFFF) + (sum >> 16);
118 sum = (sum & 0xFFFF) + (sum >> 16);
124 * Multi-flow generation mode.
126 * We originate a bunch of flows (varying destination IP addresses), and
127 * terminate receive traffic. Received traffic is simply discarded, but we
128 * still do so in order to maintain traffic statistics.
131 pkt_burst_flow_gen(struct fwd_stream *fs)
133 unsigned pkt_size = cfg_pkt_size - 4; /* Adjust FCS */
134 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
135 struct rte_mempool *mbp;
136 struct rte_mbuf *pkt;
137 struct ether_hdr *eth_hdr;
138 struct ipv4_hdr *ip_hdr;
139 struct udp_hdr *udp_hdr;
146 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
149 uint64_t core_cycles;
151 static int next_flow = 0;
153 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
154 start_tsc = rte_rdtsc();
157 /* Receive a burst of packets and discard them. */
158 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
160 fs->rx_packets += nb_rx;
162 for (i = 0; i < nb_rx; i++)
163 rte_pktmbuf_free(pkts_burst[i]);
165 mbp = current_fwd_lcore()->mbp;
166 vlan_tci = ports[fs->tx_port].tx_vlan_id;
167 ol_flags = ports[fs->tx_port].tx_ol_flags;
169 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
170 pkt = tx_mbuf_alloc(mbp);
174 pkt->data_len = pkt_size;
177 /* Initialize Ethernet header. */
178 eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
179 ether_addr_copy(&cfg_ether_dst, ð_hdr->d_addr);
180 ether_addr_copy(&cfg_ether_src, ð_hdr->s_addr);
181 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
183 /* Initialize IP header. */
184 ip_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
185 memset(ip_hdr, 0, sizeof(*ip_hdr));
186 ip_hdr->version_ihl = IP_VHL_DEF;
187 ip_hdr->type_of_service = 0;
188 ip_hdr->fragment_offset = 0;
189 ip_hdr->time_to_live = IP_DEFTTL;
190 ip_hdr->next_proto_id = IPPROTO_UDP;
191 ip_hdr->packet_id = 0;
192 ip_hdr->src_addr = rte_cpu_to_be_32(cfg_ip_src);
193 ip_hdr->dst_addr = rte_cpu_to_be_32(cfg_ip_dst +
195 ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size -
197 ip_hdr->hdr_checksum = ip_sum((uint16_t *)ip_hdr,
200 /* Initialize UDP header. */
201 udp_hdr = (struct udp_hdr *)(ip_hdr + 1);
202 udp_hdr->src_port = rte_cpu_to_be_16(cfg_udp_src);
203 udp_hdr->dst_port = rte_cpu_to_be_16(cfg_udp_dst);
204 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
205 udp_hdr->dgram_len = RTE_CPU_TO_BE_16(pkt_size -
209 pkt->pkt_len = pkt_size;
210 pkt->ol_flags = ol_flags;
211 pkt->vlan_tci = vlan_tci;
212 pkt->l2_len = sizeof(struct ether_hdr);
213 pkt->l3_len = sizeof(struct ipv4_hdr);
214 pkts_burst[nb_pkt] = pkt;
216 next_flow = (next_flow + 1) % cfg_n_flows;
219 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_pkt);
220 fs->tx_packets += nb_tx;
222 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
223 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
225 if (unlikely(nb_tx < nb_pkt)) {
226 /* Back out the flow counter. */
227 next_flow -= (nb_pkt - nb_tx);
228 while (next_flow < 0)
229 next_flow += cfg_n_flows;
232 rte_pktmbuf_free(pkts_burst[nb_tx]);
233 } while (++nb_tx < nb_pkt);
235 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
236 end_tsc = rte_rdtsc();
237 core_cycles = (end_tsc - start_tsc);
238 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
242 struct fwd_engine flow_gen_engine = {
243 .fwd_mode_name = "flowgen",
244 .port_fwd_begin = NULL,
245 .port_fwd_end = NULL,
246 .packet_fwd = pkt_burst_flow_gen,