1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2017 - 2018 Intel Corporation. */
4 #include <asm/barrier.h>
9 #include <linux/compiler.h>
10 #include <linux/if_link.h>
11 #include <linux/if_xdp.h>
12 #include <linux/if_ether.h>
14 #include <linux/udp.h>
15 #include <arpa/inet.h>
17 #include <net/ethernet.h>
27 #include <sys/resource.h>
28 #include <sys/socket.h>
29 #include <sys/types.h>
33 #include <bpf/libbpf.h>
50 #define NUM_FRAMES (4 * 1024)
51 #define MIN_PKT_SIZE 64
53 #define DEBUG_HEXDUMP 0
60 static unsigned long prev_time;
68 static enum benchmark_type opt_bench = BENCH_RXDROP;
69 static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
70 static const char *opt_if = "";
71 static int opt_ifindex;
73 static unsigned long opt_duration;
74 static unsigned long start_time;
75 static bool benchmark_done;
76 static u32 opt_batch_size = 64;
77 static int opt_pkt_count;
78 static u16 opt_pkt_size = MIN_PKT_SIZE;
79 static u32 opt_pkt_fill_pattern = 0x12345678;
80 static bool opt_extra_stats;
82 static int opt_interval = 1;
83 static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
84 static u32 opt_umem_flags;
85 static int opt_unaligned_chunks;
86 static int opt_mmap_flags;
87 static int opt_xsk_frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
88 static int opt_timeout = 1000;
89 static bool opt_need_wakeup = true;
90 static u32 opt_num_xsks = 1;
93 struct xsk_umem_info {
94 struct xsk_ring_prod fq;
95 struct xsk_ring_cons cq;
96 struct xsk_umem *umem;
100 struct xsk_socket_info {
101 struct xsk_ring_cons rx;
102 struct xsk_ring_prod tx;
103 struct xsk_umem_info *umem;
104 struct xsk_socket *xsk;
105 unsigned long rx_npkts;
106 unsigned long tx_npkts;
107 unsigned long rx_dropped_npkts;
108 unsigned long rx_invalid_npkts;
109 unsigned long tx_invalid_npkts;
110 unsigned long rx_full_npkts;
111 unsigned long rx_fill_empty_npkts;
112 unsigned long tx_empty_npkts;
113 unsigned long prev_rx_npkts;
114 unsigned long prev_tx_npkts;
115 unsigned long prev_rx_dropped_npkts;
116 unsigned long prev_rx_invalid_npkts;
117 unsigned long prev_tx_invalid_npkts;
118 unsigned long prev_rx_full_npkts;
119 unsigned long prev_rx_fill_empty_npkts;
120 unsigned long prev_tx_empty_npkts;
124 static int num_socks;
125 struct xsk_socket_info *xsks[MAX_SOCKS];
127 static unsigned long get_nsecs(void)
131 clock_gettime(CLOCK_MONOTONIC, &ts);
132 return ts.tv_sec * 1000000000UL + ts.tv_nsec;
135 static void print_benchmark(bool running)
137 const char *bench_str = "INVALID";
139 if (opt_bench == BENCH_RXDROP)
140 bench_str = "rxdrop";
141 else if (opt_bench == BENCH_TXONLY)
142 bench_str = "txonly";
143 else if (opt_bench == BENCH_L2FWD)
146 printf("%s:%d %s ", opt_if, opt_queue, bench_str);
147 if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
149 else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
158 printf("running...");
163 static int xsk_get_xdp_stats(int fd, struct xsk_socket_info *xsk)
165 struct xdp_statistics stats;
169 optlen = sizeof(stats);
170 err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen);
174 if (optlen == sizeof(struct xdp_statistics)) {
175 xsk->rx_dropped_npkts = stats.rx_dropped;
176 xsk->rx_invalid_npkts = stats.rx_invalid_descs;
177 xsk->tx_invalid_npkts = stats.tx_invalid_descs;
178 xsk->rx_full_npkts = stats.rx_ring_full;
179 xsk->rx_fill_empty_npkts = stats.rx_fill_ring_empty_descs;
180 xsk->tx_empty_npkts = stats.tx_ring_empty_descs;
187 static void dump_stats(void)
189 unsigned long now = get_nsecs();
190 long dt = now - prev_time;
195 for (i = 0; i < num_socks && xsks[i]; i++) {
196 char *fmt = "%-15s %'-11.0f %'-11lu\n";
197 double rx_pps, tx_pps, dropped_pps, rx_invalid_pps, full_pps, fill_empty_pps,
198 tx_invalid_pps, tx_empty_pps;
200 rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) *
202 tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) *
205 printf("\n sock%d@", i);
206 print_benchmark(false);
209 printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts",
211 printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts);
212 printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts);
214 xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts;
215 xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts;
217 if (opt_extra_stats) {
218 if (!xsk_get_xdp_stats(xsk_socket__fd(xsks[i]->xsk), xsks[i])) {
219 dropped_pps = (xsks[i]->rx_dropped_npkts -
220 xsks[i]->prev_rx_dropped_npkts) * 1000000000. / dt;
221 rx_invalid_pps = (xsks[i]->rx_invalid_npkts -
222 xsks[i]->prev_rx_invalid_npkts) * 1000000000. / dt;
223 tx_invalid_pps = (xsks[i]->tx_invalid_npkts -
224 xsks[i]->prev_tx_invalid_npkts) * 1000000000. / dt;
225 full_pps = (xsks[i]->rx_full_npkts -
226 xsks[i]->prev_rx_full_npkts) * 1000000000. / dt;
227 fill_empty_pps = (xsks[i]->rx_fill_empty_npkts -
228 xsks[i]->prev_rx_fill_empty_npkts)
230 tx_empty_pps = (xsks[i]->tx_empty_npkts -
231 xsks[i]->prev_tx_empty_npkts) * 1000000000. / dt;
233 printf(fmt, "rx dropped", dropped_pps,
234 xsks[i]->rx_dropped_npkts);
235 printf(fmt, "rx invalid", rx_invalid_pps,
236 xsks[i]->rx_invalid_npkts);
237 printf(fmt, "tx invalid", tx_invalid_pps,
238 xsks[i]->tx_invalid_npkts);
239 printf(fmt, "rx queue full", full_pps,
240 xsks[i]->rx_full_npkts);
241 printf(fmt, "fill ring empty", fill_empty_pps,
242 xsks[i]->rx_fill_empty_npkts);
243 printf(fmt, "tx ring empty", tx_empty_pps,
244 xsks[i]->tx_empty_npkts);
246 xsks[i]->prev_rx_dropped_npkts = xsks[i]->rx_dropped_npkts;
247 xsks[i]->prev_rx_invalid_npkts = xsks[i]->rx_invalid_npkts;
248 xsks[i]->prev_tx_invalid_npkts = xsks[i]->tx_invalid_npkts;
249 xsks[i]->prev_rx_full_npkts = xsks[i]->rx_full_npkts;
250 xsks[i]->prev_rx_fill_empty_npkts = xsks[i]->rx_fill_empty_npkts;
251 xsks[i]->prev_tx_empty_npkts = xsks[i]->tx_empty_npkts;
253 printf("%-15s\n", "Error retrieving extra stats");
259 static bool is_benchmark_done(void)
261 if (opt_duration > 0) {
262 unsigned long dt = (get_nsecs() - start_time);
264 if (dt >= opt_duration)
265 benchmark_done = true;
267 return benchmark_done;
270 static void *poller(void *arg)
273 while (!is_benchmark_done()) {
281 static void remove_xdp_program(void)
283 u32 curr_prog_id = 0;
285 if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) {
286 printf("bpf_get_link_xdp_id failed\n");
289 if (prog_id == curr_prog_id)
290 bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
291 else if (!curr_prog_id)
292 printf("couldn't find a prog id on a given interface\n");
294 printf("program on interface changed, not removing\n");
297 static void int_exit(int sig)
299 benchmark_done = true;
302 static void xdpsock_cleanup(void)
304 struct xsk_umem *umem = xsks[0]->umem->umem;
308 for (i = 0; i < num_socks; i++)
309 xsk_socket__delete(xsks[i]->xsk);
310 (void)xsk_umem__delete(umem);
311 remove_xdp_program();
314 static void __exit_with_error(int error, const char *file, const char *func,
317 fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func,
318 line, error, strerror(error));
320 remove_xdp_program();
324 #define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \
326 static void swap_mac_addresses(void *data)
328 struct ether_header *eth = (struct ether_header *)data;
329 struct ether_addr *src_addr = (struct ether_addr *)ð->ether_shost;
330 struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
331 struct ether_addr tmp;
334 *src_addr = *dst_addr;
338 static void hex_dump(void *pkt, size_t length, u64 addr)
340 const unsigned char *address = (unsigned char *)pkt;
341 const unsigned char *line = address;
342 size_t line_size = 32;
350 sprintf(buf, "addr=%llu", addr);
351 printf("length = %zu\n", length);
352 printf("%s | ", buf);
353 while (length-- > 0) {
354 printf("%02X ", *address++);
355 if (!(++i % line_size) || (length == 0 && i % line_size)) {
357 while (i++ % line_size)
360 printf(" | "); /* right close */
361 while (line < address) {
363 printf("%c", (c < 33 || c == 255) ? 0x2E : c);
367 printf("%s | ", buf);
373 static void *memset32_htonl(void *dest, u32 val, u32 size)
375 u32 *ptr = (u32 *)dest;
380 for (i = 0; i < (size & (~0x3)); i += 4)
383 for (; i < size; i++)
384 ((char *)dest)[i] = ((char *)&val)[i & 3];
390 * This function code has been taken from
391 * Linux kernel lib/checksum.c
393 static inline unsigned short from32to16(unsigned int x)
395 /* add up 16-bit and 16-bit for 16+c bit */
396 x = (x & 0xffff) + (x >> 16);
398 x = (x & 0xffff) + (x >> 16);
403 * This function code has been taken from
404 * Linux kernel lib/checksum.c
406 static unsigned int do_csum(const unsigned char *buff, int len)
408 unsigned int result = 0;
413 odd = 1 & (unsigned long)buff;
415 #ifdef __LITTLE_ENDIAN
416 result += (*buff << 8);
424 if (2 & (unsigned long)buff) {
425 result += *(unsigned short *)buff;
430 const unsigned char *end = buff +
431 ((unsigned int)len & ~3);
432 unsigned int carry = 0;
435 unsigned int w = *(unsigned int *)buff;
440 carry = (w > result);
441 } while (buff < end);
443 result = (result & 0xffff) + (result >> 16);
446 result += *(unsigned short *)buff;
451 #ifdef __LITTLE_ENDIAN
454 result += (*buff << 8);
456 result = from32to16(result);
458 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
463 __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
466 * This is a version of ip_compute_csum() optimized for IP headers,
467 * which always checksum on 4 octet boundaries.
468 * This function code has been taken from
469 * Linux kernel lib/checksum.c
471 __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
473 return (__force __sum16)~do_csum(iph, ihl * 4);
477 * Fold a partial checksum
478 * This function code has been taken from
479 * Linux kernel include/asm-generic/checksum.h
481 static inline __sum16 csum_fold(__wsum csum)
483 u32 sum = (__force u32)csum;
485 sum = (sum & 0xffff) + (sum >> 16);
486 sum = (sum & 0xffff) + (sum >> 16);
487 return (__force __sum16)~sum;
491 * This function code has been taken from
492 * Linux kernel lib/checksum.c
494 static inline u32 from64to32(u64 x)
496 /* add up 32-bit and 32-bit for 32+c bit */
497 x = (x & 0xffffffff) + (x >> 32);
499 x = (x & 0xffffffff) + (x >> 32);
503 __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
504 __u32 len, __u8 proto, __wsum sum);
507 * This function code has been taken from
508 * Linux kernel lib/checksum.c
510 __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
511 __u32 len, __u8 proto, __wsum sum)
513 unsigned long long s = (__force u32)sum;
515 s += (__force u32)saddr;
516 s += (__force u32)daddr;
517 #ifdef __BIG_ENDIAN__
520 s += (proto + len) << 8;
522 return (__force __wsum)from64to32(s);
526 * This function has been taken from
527 * Linux kernel include/asm-generic/checksum.h
529 static inline __sum16
530 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len,
531 __u8 proto, __wsum sum)
533 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
536 static inline u16 udp_csum(u32 saddr, u32 daddr, u32 len,
537 u8 proto, u16 *udp_pkt)
542 /* udp hdr and data */
543 for (; cnt < len; cnt += 2)
544 csum += udp_pkt[cnt >> 1];
546 return csum_tcpudp_magic(saddr, daddr, len, proto, csum);
549 #define ETH_FCS_SIZE 4
551 #define PKT_HDR_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
552 sizeof(struct udphdr))
554 #define PKT_SIZE (opt_pkt_size - ETH_FCS_SIZE)
555 #define IP_PKT_SIZE (PKT_SIZE - sizeof(struct ethhdr))
556 #define UDP_PKT_SIZE (IP_PKT_SIZE - sizeof(struct iphdr))
557 #define UDP_PKT_DATA_SIZE (UDP_PKT_SIZE - sizeof(struct udphdr))
559 static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
561 static void gen_eth_hdr_data(void)
563 struct udphdr *udp_hdr = (struct udphdr *)(pkt_data +
564 sizeof(struct ethhdr) +
565 sizeof(struct iphdr));
566 struct iphdr *ip_hdr = (struct iphdr *)(pkt_data +
567 sizeof(struct ethhdr));
568 struct ethhdr *eth_hdr = (struct ethhdr *)pkt_data;
570 /* ethernet header */
571 memcpy(eth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
572 memcpy(eth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
573 eth_hdr->h_proto = htons(ETH_P_IP);
576 ip_hdr->version = IPVERSION;
577 ip_hdr->ihl = 0x5; /* 20 byte header */
579 ip_hdr->tot_len = htons(IP_PKT_SIZE);
581 ip_hdr->frag_off = 0;
582 ip_hdr->ttl = IPDEFTTL;
583 ip_hdr->protocol = IPPROTO_UDP;
584 ip_hdr->saddr = htonl(0x0a0a0a10);
585 ip_hdr->daddr = htonl(0x0a0a0a20);
587 /* IP header checksum */
589 ip_hdr->check = ip_fast_csum((const void *)ip_hdr, ip_hdr->ihl);
592 udp_hdr->source = htons(0x1000);
593 udp_hdr->dest = htons(0x1000);
594 udp_hdr->len = htons(UDP_PKT_SIZE);
597 memset32_htonl(pkt_data + PKT_HDR_SIZE, opt_pkt_fill_pattern,
600 /* UDP header checksum */
602 udp_hdr->check = udp_csum(ip_hdr->saddr, ip_hdr->daddr, UDP_PKT_SIZE,
603 IPPROTO_UDP, (u16 *)udp_hdr);
606 static void gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
608 memcpy(xsk_umem__get_data(umem->buffer, addr), pkt_data,
612 static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
614 struct xsk_umem_info *umem;
615 struct xsk_umem_config cfg = {
616 .fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
617 .comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
618 .frame_size = opt_xsk_frame_size,
619 .frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM,
620 .flags = opt_umem_flags
624 umem = calloc(1, sizeof(*umem));
626 exit_with_error(errno);
628 ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq,
631 exit_with_error(-ret);
633 umem->buffer = buffer;
637 static void xsk_populate_fill_ring(struct xsk_umem_info *umem)
642 ret = xsk_ring_prod__reserve(&umem->fq,
643 XSK_RING_PROD__DEFAULT_NUM_DESCS, &idx);
644 if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS)
645 exit_with_error(-ret);
646 for (i = 0; i < XSK_RING_PROD__DEFAULT_NUM_DESCS; i++)
647 *xsk_ring_prod__fill_addr(&umem->fq, idx++) =
648 i * opt_xsk_frame_size;
649 xsk_ring_prod__submit(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS);
652 static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem,
655 struct xsk_socket_config cfg;
656 struct xsk_socket_info *xsk;
657 struct xsk_ring_cons *rxr;
658 struct xsk_ring_prod *txr;
661 xsk = calloc(1, sizeof(*xsk));
663 exit_with_error(errno);
666 cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
667 cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
668 if (opt_num_xsks > 1)
669 cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
671 cfg.libbpf_flags = 0;
672 cfg.xdp_flags = opt_xdp_flags;
673 cfg.bind_flags = opt_xdp_bind_flags;
675 rxr = rx ? &xsk->rx : NULL;
676 txr = tx ? &xsk->tx : NULL;
677 ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem,
680 exit_with_error(-ret);
682 ret = bpf_get_link_xdp_id(opt_ifindex, &prog_id, opt_xdp_flags);
684 exit_with_error(-ret);
689 static struct option long_options[] = {
690 {"rxdrop", no_argument, 0, 'r'},
691 {"txonly", no_argument, 0, 't'},
692 {"l2fwd", no_argument, 0, 'l'},
693 {"interface", required_argument, 0, 'i'},
694 {"queue", required_argument, 0, 'q'},
695 {"poll", no_argument, 0, 'p'},
696 {"xdp-skb", no_argument, 0, 'S'},
697 {"xdp-native", no_argument, 0, 'N'},
698 {"interval", required_argument, 0, 'n'},
699 {"zero-copy", no_argument, 0, 'z'},
700 {"copy", no_argument, 0, 'c'},
701 {"frame-size", required_argument, 0, 'f'},
702 {"no-need-wakeup", no_argument, 0, 'm'},
703 {"unaligned", no_argument, 0, 'u'},
704 {"shared-umem", no_argument, 0, 'M'},
705 {"force", no_argument, 0, 'F'},
706 {"duration", required_argument, 0, 'd'},
707 {"batch-size", required_argument, 0, 'b'},
708 {"tx-pkt-count", required_argument, 0, 'C'},
709 {"tx-pkt-size", required_argument, 0, 's'},
710 {"tx-pkt-pattern", required_argument, 0, 'P'},
711 {"extra-stats", no_argument, 0, 'x'},
715 static void usage(const char *prog)
718 " Usage: %s [OPTIONS]\n"
720 " -r, --rxdrop Discard all incoming packets (default)\n"
721 " -t, --txonly Only send packets\n"
722 " -l, --l2fwd MAC swap L2 forwarding\n"
723 " -i, --interface=n Run on interface n\n"
724 " -q, --queue=n Use queue n (default 0)\n"
725 " -p, --poll Use poll syscall\n"
726 " -S, --xdp-skb=n Use XDP skb-mod\n"
727 " -N, --xdp-native=n Enforce XDP native mode\n"
728 " -n, --interval=n Specify statistics update interval (default 1 sec).\n"
729 " -z, --zero-copy Force zero-copy mode.\n"
730 " -c, --copy Force copy mode.\n"
731 " -m, --no-need-wakeup Turn off use of driver need wakeup flag.\n"
732 " -f, --frame-size=n Set the frame size (must be a power of two in aligned mode, default is %d).\n"
733 " -u, --unaligned Enable unaligned chunk placement\n"
734 " -M, --shared-umem Enable XDP_SHARED_UMEM\n"
735 " -F, --force Force loading the XDP prog\n"
736 " -d, --duration=n Duration in secs to run command.\n"
737 " Default: forever.\n"
738 " -b, --batch-size=n Batch size for sending or receiving\n"
739 " packets. Default: %d\n"
740 " -C, --tx-pkt-count=n Number of packets to send.\n"
741 " Default: Continuous packets.\n"
742 " -s, --tx-pkt-size=n Transmit packet size.\n"
743 " (Default: %d bytes)\n"
744 " Min size: %d, Max size %d.\n"
745 " -P, --tx-pkt-pattern=nPacket fill pattern. Default: 0x%x\n"
746 " -x, --extra-stats Display extra statistics.\n"
748 fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE,
749 opt_batch_size, MIN_PKT_SIZE, MIN_PKT_SIZE,
750 XSK_UMEM__DEFAULT_FRAME_SIZE, opt_pkt_fill_pattern);
755 static void parse_command_line(int argc, char **argv)
762 c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:x",
763 long_options, &option_index);
769 opt_bench = BENCH_RXDROP;
772 opt_bench = BENCH_TXONLY;
775 opt_bench = BENCH_L2FWD;
781 opt_queue = atoi(optarg);
787 opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
788 opt_xdp_bind_flags |= XDP_COPY;
791 /* default, set below */
794 opt_interval = atoi(optarg);
797 opt_xdp_bind_flags |= XDP_ZEROCOPY;
800 opt_xdp_bind_flags |= XDP_COPY;
803 opt_umem_flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG;
804 opt_unaligned_chunks = 1;
805 opt_mmap_flags = MAP_HUGETLB;
808 opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
811 opt_xsk_frame_size = atoi(optarg);
814 opt_need_wakeup = false;
815 opt_xdp_bind_flags &= ~XDP_USE_NEED_WAKEUP;
818 opt_num_xsks = MAX_SOCKS;
821 opt_duration = atoi(optarg);
822 opt_duration *= 1000000000;
825 opt_batch_size = atoi(optarg);
828 opt_pkt_count = atoi(optarg);
831 opt_pkt_size = atoi(optarg);
832 if (opt_pkt_size > (XSK_UMEM__DEFAULT_FRAME_SIZE) ||
833 opt_pkt_size < MIN_PKT_SIZE) {
835 "ERROR: Invalid frame size %d\n",
837 usage(basename(argv[0]));
841 opt_pkt_fill_pattern = strtol(optarg, NULL, 16);
847 usage(basename(argv[0]));
851 if (!(opt_xdp_flags & XDP_FLAGS_SKB_MODE))
852 opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
854 opt_ifindex = if_nametoindex(opt_if);
856 fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
858 usage(basename(argv[0]));
861 if ((opt_xsk_frame_size & (opt_xsk_frame_size - 1)) &&
862 !opt_unaligned_chunks) {
863 fprintf(stderr, "--frame-size=%d is not a power of two\n",
865 usage(basename(argv[0]));
869 static void kick_tx(struct xsk_socket_info *xsk)
873 ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
874 if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN ||
875 errno == EBUSY || errno == ENETDOWN)
877 exit_with_error(errno);
880 static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk,
883 struct xsk_umem_info *umem = xsk->umem;
884 u32 idx_cq = 0, idx_fq = 0;
888 if (!xsk->outstanding_tx)
891 if (!opt_need_wakeup || xsk_ring_prod__needs_wakeup(&xsk->tx))
894 ndescs = (xsk->outstanding_tx > opt_batch_size) ? opt_batch_size :
897 /* re-add completed Tx buffers */
898 rcvd = xsk_ring_cons__peek(&umem->cq, ndescs, &idx_cq);
903 ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
904 while (ret != rcvd) {
906 exit_with_error(-ret);
907 if (xsk_ring_prod__needs_wakeup(&umem->fq))
908 ret = poll(fds, num_socks, opt_timeout);
909 ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
912 for (i = 0; i < rcvd; i++)
913 *xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) =
914 *xsk_ring_cons__comp_addr(&umem->cq, idx_cq++);
916 xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
917 xsk_ring_cons__release(&xsk->umem->cq, rcvd);
918 xsk->outstanding_tx -= rcvd;
919 xsk->tx_npkts += rcvd;
923 static inline void complete_tx_only(struct xsk_socket_info *xsk,
929 if (!xsk->outstanding_tx)
932 if (!opt_need_wakeup || xsk_ring_prod__needs_wakeup(&xsk->tx))
935 rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx);
937 xsk_ring_cons__release(&xsk->umem->cq, rcvd);
938 xsk->outstanding_tx -= rcvd;
939 xsk->tx_npkts += rcvd;
943 static void rx_drop(struct xsk_socket_info *xsk, struct pollfd *fds)
945 unsigned int rcvd, i;
946 u32 idx_rx = 0, idx_fq = 0;
949 rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx);
951 if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq))
952 ret = poll(fds, num_socks, opt_timeout);
956 ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
957 while (ret != rcvd) {
959 exit_with_error(-ret);
960 if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq))
961 ret = poll(fds, num_socks, opt_timeout);
962 ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
965 for (i = 0; i < rcvd; i++) {
966 u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
967 u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
968 u64 orig = xsk_umem__extract_addr(addr);
970 addr = xsk_umem__add_offset_to_addr(addr);
971 char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
973 hex_dump(pkt, len, addr);
974 *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = orig;
977 xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
978 xsk_ring_cons__release(&xsk->rx, rcvd);
979 xsk->rx_npkts += rcvd;
982 static void rx_drop_all(void)
984 struct pollfd fds[MAX_SOCKS] = {};
987 for (i = 0; i < num_socks; i++) {
988 fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
989 fds[i].events = POLLIN;
994 ret = poll(fds, num_socks, opt_timeout);
999 for (i = 0; i < num_socks; i++)
1000 rx_drop(xsks[i], fds);
1007 static void tx_only(struct xsk_socket_info *xsk, u32 frame_nb, int batch_size)
1012 while (xsk_ring_prod__reserve(&xsk->tx, batch_size, &idx) <
1014 complete_tx_only(xsk, batch_size);
1017 for (i = 0; i < batch_size; i++) {
1018 struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx,
1020 tx_desc->addr = (frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
1021 tx_desc->len = PKT_SIZE;
1024 xsk_ring_prod__submit(&xsk->tx, batch_size);
1025 xsk->outstanding_tx += batch_size;
1026 frame_nb += batch_size;
1027 frame_nb %= NUM_FRAMES;
1028 complete_tx_only(xsk, batch_size);
1031 static inline int get_batch_size(int pkt_cnt)
1034 return opt_batch_size;
1036 if (pkt_cnt + opt_batch_size <= opt_pkt_count)
1037 return opt_batch_size;
1039 return opt_pkt_count - pkt_cnt;
1042 static void complete_tx_only_all(void)
1049 for (i = 0; i < num_socks; i++) {
1050 if (xsks[i]->outstanding_tx) {
1051 complete_tx_only(xsks[i], opt_batch_size);
1052 pending = !!xsks[i]->outstanding_tx;
1058 static void tx_only_all(void)
1060 struct pollfd fds[MAX_SOCKS] = {};
1061 u32 frame_nb[MAX_SOCKS] = {};
1065 for (i = 0; i < num_socks; i++) {
1066 fds[0].fd = xsk_socket__fd(xsks[i]->xsk);
1067 fds[0].events = POLLOUT;
1070 while ((opt_pkt_count && pkt_cnt < opt_pkt_count) || !opt_pkt_count) {
1071 int batch_size = get_batch_size(pkt_cnt);
1074 ret = poll(fds, num_socks, opt_timeout);
1078 if (!(fds[0].revents & POLLOUT))
1082 for (i = 0; i < num_socks; i++)
1083 tx_only(xsks[i], frame_nb[i], batch_size);
1085 pkt_cnt += batch_size;
1092 complete_tx_only_all();
1095 static void l2fwd(struct xsk_socket_info *xsk, struct pollfd *fds)
1097 unsigned int rcvd, i;
1098 u32 idx_rx = 0, idx_tx = 0;
1101 complete_tx_l2fwd(xsk, fds);
1103 rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx);
1105 if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq))
1106 ret = poll(fds, num_socks, opt_timeout);
1110 ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
1111 while (ret != rcvd) {
1113 exit_with_error(-ret);
1114 if (xsk_ring_prod__needs_wakeup(&xsk->tx))
1116 ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
1119 for (i = 0; i < rcvd; i++) {
1120 u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
1121 u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
1124 addr = xsk_umem__add_offset_to_addr(addr);
1125 char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
1127 swap_mac_addresses(pkt);
1129 hex_dump(pkt, len, addr);
1130 xsk_ring_prod__tx_desc(&xsk->tx, idx_tx)->addr = orig;
1131 xsk_ring_prod__tx_desc(&xsk->tx, idx_tx++)->len = len;
1134 xsk_ring_prod__submit(&xsk->tx, rcvd);
1135 xsk_ring_cons__release(&xsk->rx, rcvd);
1137 xsk->rx_npkts += rcvd;
1138 xsk->outstanding_tx += rcvd;
1141 static void l2fwd_all(void)
1143 struct pollfd fds[MAX_SOCKS] = {};
1146 for (i = 0; i < num_socks; i++) {
1147 fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
1148 fds[i].events = POLLOUT | POLLIN;
1153 ret = poll(fds, num_socks, opt_timeout);
1158 for (i = 0; i < num_socks; i++)
1159 l2fwd(xsks[i], fds);
1166 static void load_xdp_program(char **argv, struct bpf_object **obj)
1168 struct bpf_prog_load_attr prog_load_attr = {
1169 .prog_type = BPF_PROG_TYPE_XDP,
1171 char xdp_filename[256];
1174 snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
1175 prog_load_attr.file = xdp_filename;
1177 if (bpf_prog_load_xattr(&prog_load_attr, obj, &prog_fd))
1180 fprintf(stderr, "ERROR: no program found: %s\n",
1185 if (bpf_set_link_xdp_fd(opt_ifindex, prog_fd, opt_xdp_flags) < 0) {
1186 fprintf(stderr, "ERROR: link set xdp fd failed\n");
1191 static void enter_xsks_into_map(struct bpf_object *obj)
1193 struct bpf_map *map;
1196 map = bpf_object__find_map_by_name(obj, "xsks_map");
1197 xsks_map = bpf_map__fd(map);
1199 fprintf(stderr, "ERROR: no xsks map found: %s\n",
1200 strerror(xsks_map));
1204 for (i = 0; i < num_socks; i++) {
1205 int fd = xsk_socket__fd(xsks[i]->xsk);
1209 ret = bpf_map_update_elem(xsks_map, &key, &fd, 0);
1211 fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
1217 int main(int argc, char **argv)
1219 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
1220 bool rx = false, tx = false;
1221 struct xsk_umem_info *umem;
1222 struct bpf_object *obj;
1227 parse_command_line(argc, argv);
1229 if (setrlimit(RLIMIT_MEMLOCK, &r)) {
1230 fprintf(stderr, "ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
1235 if (opt_num_xsks > 1)
1236 load_xdp_program(argv, &obj);
1238 /* Reserve memory for the umem. Use hugepages if unaligned chunk mode */
1239 bufs = mmap(NULL, NUM_FRAMES * opt_xsk_frame_size,
1240 PROT_READ | PROT_WRITE,
1241 MAP_PRIVATE | MAP_ANONYMOUS | opt_mmap_flags, -1, 0);
1242 if (bufs == MAP_FAILED) {
1243 printf("ERROR: mmap failed\n");
1247 /* Create sockets... */
1248 umem = xsk_configure_umem(bufs, NUM_FRAMES * opt_xsk_frame_size);
1249 if (opt_bench == BENCH_RXDROP || opt_bench == BENCH_L2FWD) {
1251 xsk_populate_fill_ring(umem);
1253 if (opt_bench == BENCH_L2FWD || opt_bench == BENCH_TXONLY)
1255 for (i = 0; i < opt_num_xsks; i++)
1256 xsks[num_socks++] = xsk_configure_socket(umem, rx, tx);
1258 if (opt_bench == BENCH_TXONLY) {
1261 for (i = 0; i < NUM_FRAMES; i++)
1262 gen_eth_frame(umem, i * opt_xsk_frame_size);
1265 if (opt_num_xsks > 1 && opt_bench != BENCH_TXONLY)
1266 enter_xsks_into_map(obj);
1268 signal(SIGINT, int_exit);
1269 signal(SIGTERM, int_exit);
1270 signal(SIGABRT, int_exit);
1272 setlocale(LC_ALL, "");
1274 ret = pthread_create(&pt, NULL, poller, NULL);
1276 exit_with_error(ret);
1278 prev_time = get_nsecs();
1279 start_time = prev_time;
1281 if (opt_bench == BENCH_RXDROP)
1283 else if (opt_bench == BENCH_TXONLY)
1288 benchmark_done = true;
1290 pthread_join(pt, NULL);