1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2017 - 2018 Intel Corporation. */
9 #include <linux/if_link.h>
10 #include <linux/if_xdp.h>
11 #include <linux/if_ether.h>
18 #include <net/ethernet.h>
19 #include <sys/resource.h>
20 #include <sys/socket.h>
26 #include <sys/types.h>
47 #define NUM_FRAMES 131072
48 #define FRAME_HEADROOM 0
49 #define FRAME_SHIFT 11
50 #define FRAME_SIZE 2048
51 #define NUM_DESCS 1024
54 #define FQ_NUM_DESCS 1024
55 #define CQ_NUM_DESCS 1024
57 #define DEBUG_HEXDUMP 0
62 static unsigned long prev_time;
70 static enum benchmark_type opt_bench = BENCH_RXDROP;
71 static u32 opt_xdp_flags;
72 static const char *opt_if = "";
73 static int opt_ifindex;
76 static int opt_shared_packet_buffer;
77 static int opt_interval = 1;
78 static u32 opt_xdp_bind_flags;
80 struct xdp_umem_uqueue {
93 struct xdp_umem_uqueue fq;
94 struct xdp_umem_uqueue cq;
105 struct xdp_desc *ring;
110 struct xdp_uqueue rx;
111 struct xdp_uqueue tx;
113 struct xdp_umem *umem;
115 unsigned long rx_npkts;
116 unsigned long tx_npkts;
117 unsigned long prev_rx_npkts;
118 unsigned long prev_tx_npkts;
122 static int num_socks;
123 struct xdpsock *xsks[MAX_SOCKS];
125 static unsigned long get_nsecs(void)
129 clock_gettime(CLOCK_MONOTONIC, &ts);
130 return ts.tv_sec * 1000000000UL + ts.tv_nsec;
133 static void dump_stats(void);
135 #define lassert(expr) \
138 fprintf(stderr, "%s:%s:%i: Assertion failed: " \
139 #expr ": errno: %d/\"%s\"\n", \
140 __FILE__, __func__, __LINE__, \
141 errno, strerror(errno)); \
143 exit(EXIT_FAILURE); \
147 #define barrier() __asm__ __volatile__("": : :"memory")
148 #define u_smp_rmb() barrier()
149 #define u_smp_wmb() barrier()
150 #define likely(x) __builtin_expect(!!(x), 1)
151 #define unlikely(x) __builtin_expect(!!(x), 0)
153 static const char pkt_data[] =
154 "\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00"
155 "\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14"
156 "\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b"
157 "\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa";
159 static inline u32 umem_nb_free(struct xdp_umem_uqueue *q, u32 nb)
161 u32 free_entries = q->cached_cons - q->cached_prod;
163 if (free_entries >= nb)
166 /* Refresh the local tail pointer */
167 q->cached_cons = *q->consumer + q->size;
169 return q->cached_cons - q->cached_prod;
172 static inline u32 xq_nb_free(struct xdp_uqueue *q, u32 ndescs)
174 u32 free_entries = q->cached_cons - q->cached_prod;
176 if (free_entries >= ndescs)
179 /* Refresh the local tail pointer */
180 q->cached_cons = *q->consumer + q->size;
181 return q->cached_cons - q->cached_prod;
184 static inline u32 umem_nb_avail(struct xdp_umem_uqueue *q, u32 nb)
186 u32 entries = q->cached_prod - q->cached_cons;
189 q->cached_prod = *q->producer;
190 entries = q->cached_prod - q->cached_cons;
193 return (entries > nb) ? nb : entries;
196 static inline u32 xq_nb_avail(struct xdp_uqueue *q, u32 ndescs)
198 u32 entries = q->cached_prod - q->cached_cons;
201 q->cached_prod = *q->producer;
202 entries = q->cached_prod - q->cached_cons;
205 return (entries > ndescs) ? ndescs : entries;
208 static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq,
214 if (umem_nb_free(fq, nb) < nb)
217 for (i = 0; i < nb; i++) {
218 u32 idx = fq->cached_prod++ & fq->mask;
220 fq->ring[idx] = d[i].addr;
225 *fq->producer = fq->cached_prod;
230 static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u64 *d,
235 if (umem_nb_free(fq, nb) < nb)
238 for (i = 0; i < nb; i++) {
239 u32 idx = fq->cached_prod++ & fq->mask;
241 fq->ring[idx] = d[i];
246 *fq->producer = fq->cached_prod;
251 static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq,
254 u32 idx, i, entries = umem_nb_avail(cq, nb);
258 for (i = 0; i < entries; i++) {
259 idx = cq->cached_cons++ & cq->mask;
260 d[i] = cq->ring[idx];
266 *cq->consumer = cq->cached_cons;
272 static inline void *xq_get_data(struct xdpsock *xsk, u64 addr)
274 return &xsk->umem->frames[addr];
277 static inline int xq_enq(struct xdp_uqueue *uq,
278 const struct xdp_desc *descs,
281 struct xdp_desc *r = uq->ring;
284 if (xq_nb_free(uq, ndescs) < ndescs)
287 for (i = 0; i < ndescs; i++) {
288 u32 idx = uq->cached_prod++ & uq->mask;
290 r[idx].addr = descs[i].addr;
291 r[idx].len = descs[i].len;
296 *uq->producer = uq->cached_prod;
300 static inline int xq_enq_tx_only(struct xdp_uqueue *uq,
301 unsigned int id, unsigned int ndescs)
303 struct xdp_desc *r = uq->ring;
306 if (xq_nb_free(uq, ndescs) < ndescs)
309 for (i = 0; i < ndescs; i++) {
310 u32 idx = uq->cached_prod++ & uq->mask;
312 r[idx].addr = (id + i) << FRAME_SHIFT;
313 r[idx].len = sizeof(pkt_data) - 1;
318 *uq->producer = uq->cached_prod;
322 static inline int xq_deq(struct xdp_uqueue *uq,
323 struct xdp_desc *descs,
326 struct xdp_desc *r = uq->ring;
330 entries = xq_nb_avail(uq, ndescs);
334 for (i = 0; i < entries; i++) {
335 idx = uq->cached_cons++ & uq->mask;
342 *uq->consumer = uq->cached_cons;
348 static void swap_mac_addresses(void *data)
350 struct ether_header *eth = (struct ether_header *)data;
351 struct ether_addr *src_addr = (struct ether_addr *)ð->ether_shost;
352 struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
353 struct ether_addr tmp;
356 *src_addr = *dst_addr;
360 static void hex_dump(void *pkt, size_t length, u64 addr)
362 const unsigned char *address = (unsigned char *)pkt;
363 const unsigned char *line = address;
364 size_t line_size = 32;
372 sprintf(buf, "addr=%llu", addr);
373 printf("length = %zu\n", length);
374 printf("%s | ", buf);
375 while (length-- > 0) {
376 printf("%02X ", *address++);
377 if (!(++i % line_size) || (length == 0 && i % line_size)) {
379 while (i++ % line_size)
382 printf(" | "); /* right close */
383 while (line < address) {
385 printf("%c", (c < 33 || c == 255) ? 0x2E : c);
389 printf("%s | ", buf);
395 static size_t gen_eth_frame(char *frame)
397 memcpy(frame, pkt_data, sizeof(pkt_data) - 1);
398 return sizeof(pkt_data) - 1;
401 static struct xdp_umem *xdp_umem_configure(int sfd)
403 int fq_size = FQ_NUM_DESCS, cq_size = CQ_NUM_DESCS;
404 struct xdp_mmap_offsets off;
405 struct xdp_umem_reg mr;
406 struct xdp_umem *umem;
410 umem = calloc(1, sizeof(*umem));
413 lassert(posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */
414 NUM_FRAMES * FRAME_SIZE) == 0);
416 mr.addr = (__u64)bufs;
417 mr.len = NUM_FRAMES * FRAME_SIZE;
418 mr.chunk_size = FRAME_SIZE;
419 mr.headroom = FRAME_HEADROOM;
421 lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &mr, sizeof(mr)) == 0);
422 lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_FILL_RING, &fq_size,
424 lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_COMPLETION_RING, &cq_size,
427 optlen = sizeof(off);
428 lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off,
431 umem->fq.map = mmap(0, off.fr.desc +
432 FQ_NUM_DESCS * sizeof(u64),
433 PROT_READ | PROT_WRITE,
434 MAP_SHARED | MAP_POPULATE, sfd,
435 XDP_UMEM_PGOFF_FILL_RING);
436 lassert(umem->fq.map != MAP_FAILED);
438 umem->fq.mask = FQ_NUM_DESCS - 1;
439 umem->fq.size = FQ_NUM_DESCS;
440 umem->fq.producer = umem->fq.map + off.fr.producer;
441 umem->fq.consumer = umem->fq.map + off.fr.consumer;
442 umem->fq.ring = umem->fq.map + off.fr.desc;
443 umem->fq.cached_cons = FQ_NUM_DESCS;
445 umem->cq.map = mmap(0, off.cr.desc +
446 CQ_NUM_DESCS * sizeof(u64),
447 PROT_READ | PROT_WRITE,
448 MAP_SHARED | MAP_POPULATE, sfd,
449 XDP_UMEM_PGOFF_COMPLETION_RING);
450 lassert(umem->cq.map != MAP_FAILED);
452 umem->cq.mask = CQ_NUM_DESCS - 1;
453 umem->cq.size = CQ_NUM_DESCS;
454 umem->cq.producer = umem->cq.map + off.cr.producer;
455 umem->cq.consumer = umem->cq.map + off.cr.consumer;
456 umem->cq.ring = umem->cq.map + off.cr.desc;
461 if (opt_bench == BENCH_TXONLY) {
464 for (i = 0; i < NUM_FRAMES * FRAME_SIZE; i += FRAME_SIZE)
465 (void)gen_eth_frame(&umem->frames[i]);
471 static struct xdpsock *xsk_configure(struct xdp_umem *umem)
473 struct sockaddr_xdp sxdp = {};
474 struct xdp_mmap_offsets off;
475 int sfd, ndescs = NUM_DESCS;
481 sfd = socket(PF_XDP, SOCK_RAW, 0);
484 xsk = calloc(1, sizeof(*xsk));
488 xsk->outstanding_tx = 0;
492 xsk->umem = xdp_umem_configure(sfd);
497 lassert(setsockopt(sfd, SOL_XDP, XDP_RX_RING,
498 &ndescs, sizeof(int)) == 0);
499 lassert(setsockopt(sfd, SOL_XDP, XDP_TX_RING,
500 &ndescs, sizeof(int)) == 0);
501 optlen = sizeof(off);
502 lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off,
506 xsk->rx.map = mmap(NULL,
508 NUM_DESCS * sizeof(struct xdp_desc),
509 PROT_READ | PROT_WRITE,
510 MAP_SHARED | MAP_POPULATE, sfd,
512 lassert(xsk->rx.map != MAP_FAILED);
515 for (i = 0; i < NUM_DESCS * FRAME_SIZE; i += FRAME_SIZE)
516 lassert(umem_fill_to_kernel(&xsk->umem->fq, &i, 1)
521 xsk->tx.map = mmap(NULL,
523 NUM_DESCS * sizeof(struct xdp_desc),
524 PROT_READ | PROT_WRITE,
525 MAP_SHARED | MAP_POPULATE, sfd,
527 lassert(xsk->tx.map != MAP_FAILED);
529 xsk->rx.mask = NUM_DESCS - 1;
530 xsk->rx.size = NUM_DESCS;
531 xsk->rx.producer = xsk->rx.map + off.rx.producer;
532 xsk->rx.consumer = xsk->rx.map + off.rx.consumer;
533 xsk->rx.ring = xsk->rx.map + off.rx.desc;
535 xsk->tx.mask = NUM_DESCS - 1;
536 xsk->tx.size = NUM_DESCS;
537 xsk->tx.producer = xsk->tx.map + off.tx.producer;
538 xsk->tx.consumer = xsk->tx.map + off.tx.consumer;
539 xsk->tx.ring = xsk->tx.map + off.tx.desc;
540 xsk->tx.cached_cons = NUM_DESCS;
542 sxdp.sxdp_family = PF_XDP;
543 sxdp.sxdp_ifindex = opt_ifindex;
544 sxdp.sxdp_queue_id = opt_queue;
547 sxdp.sxdp_flags = XDP_SHARED_UMEM;
548 sxdp.sxdp_shared_umem_fd = umem->fd;
550 sxdp.sxdp_flags = opt_xdp_bind_flags;
553 lassert(bind(sfd, (struct sockaddr *)&sxdp, sizeof(sxdp)) == 0);
558 static void print_benchmark(bool running)
560 const char *bench_str = "INVALID";
562 if (opt_bench == BENCH_RXDROP)
563 bench_str = "rxdrop";
564 else if (opt_bench == BENCH_TXONLY)
565 bench_str = "txonly";
566 else if (opt_bench == BENCH_L2FWD)
569 printf("%s:%d %s ", opt_if, opt_queue, bench_str);
570 if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
572 else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
581 printf("running...");
586 static void dump_stats(void)
588 unsigned long now = get_nsecs();
589 long dt = now - prev_time;
594 for (i = 0; i < num_socks; i++) {
595 char *fmt = "%-15s %'-11.0f %'-11lu\n";
596 double rx_pps, tx_pps;
598 rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) *
600 tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) *
603 printf("\n sock%d@", i);
604 print_benchmark(false);
607 printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts",
609 printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts);
610 printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts);
612 xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts;
613 xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts;
617 static void *poller(void *arg)
628 static void int_exit(int sig)
632 bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
636 static struct option long_options[] = {
637 {"rxdrop", no_argument, 0, 'r'},
638 {"txonly", no_argument, 0, 't'},
639 {"l2fwd", no_argument, 0, 'l'},
640 {"interface", required_argument, 0, 'i'},
641 {"queue", required_argument, 0, 'q'},
642 {"poll", no_argument, 0, 'p'},
643 {"shared-buffer", no_argument, 0, 's'},
644 {"xdp-skb", no_argument, 0, 'S'},
645 {"xdp-native", no_argument, 0, 'N'},
646 {"interval", required_argument, 0, 'n'},
650 static void usage(const char *prog)
653 " Usage: %s [OPTIONS]\n"
655 " -r, --rxdrop Discard all incoming packets (default)\n"
656 " -t, --txonly Only send packets\n"
657 " -l, --l2fwd MAC swap L2 forwarding\n"
658 " -i, --interface=n Run on interface n\n"
659 " -q, --queue=n Use queue n (default 0)\n"
660 " -p, --poll Use poll syscall\n"
661 " -s, --shared-buffer Use shared packet buffer\n"
662 " -S, --xdp-skb=n Use XDP skb-mod\n"
663 " -N, --xdp-native=n Enfore XDP native mode\n"
664 " -n, --interval=n Specify statistics update interval (default 1 sec).\n"
666 fprintf(stderr, str, prog);
670 static void parse_command_line(int argc, char **argv)
677 c = getopt_long(argc, argv, "rtli:q:psSNn:", long_options,
684 opt_bench = BENCH_RXDROP;
687 opt_bench = BENCH_TXONLY;
690 opt_bench = BENCH_L2FWD;
696 opt_queue = atoi(optarg);
699 opt_shared_packet_buffer = 1;
705 opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
706 opt_xdp_bind_flags |= XDP_COPY;
709 opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
712 opt_interval = atoi(optarg);
715 usage(basename(argv[0]));
719 opt_ifindex = if_nametoindex(opt_if);
721 fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
723 usage(basename(argv[0]));
727 static void kick_tx(int fd)
731 ret = sendto(fd, NULL, 0, MSG_DONTWAIT, NULL, 0);
732 if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN)
737 static inline void complete_tx_l2fwd(struct xdpsock *xsk)
739 u64 descs[BATCH_SIZE];
743 if (!xsk->outstanding_tx)
747 ndescs = (xsk->outstanding_tx > BATCH_SIZE) ? BATCH_SIZE :
750 /* re-add completed Tx buffers */
751 rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, ndescs);
753 umem_fill_to_kernel(&xsk->umem->fq, descs, rcvd);
754 xsk->outstanding_tx -= rcvd;
755 xsk->tx_npkts += rcvd;
759 static inline void complete_tx_only(struct xdpsock *xsk)
761 u64 descs[BATCH_SIZE];
764 if (!xsk->outstanding_tx)
769 rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, BATCH_SIZE);
771 xsk->outstanding_tx -= rcvd;
772 xsk->tx_npkts += rcvd;
776 static void rx_drop(struct xdpsock *xsk)
778 struct xdp_desc descs[BATCH_SIZE];
779 unsigned int rcvd, i;
781 rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE);
785 for (i = 0; i < rcvd; i++) {
786 char *pkt = xq_get_data(xsk, descs[i].addr);
788 hex_dump(pkt, descs[i].len, descs[i].addr);
791 xsk->rx_npkts += rcvd;
793 umem_fill_to_kernel_ex(&xsk->umem->fq, descs, rcvd);
796 static void rx_drop_all(void)
798 struct pollfd fds[MAX_SOCKS + 1];
799 int i, ret, timeout, nfds = 1;
801 memset(fds, 0, sizeof(fds));
803 for (i = 0; i < num_socks; i++) {
804 fds[i].fd = xsks[i]->sfd;
805 fds[i].events = POLLIN;
806 timeout = 1000; /* 1sn */
811 ret = poll(fds, nfds, timeout);
816 for (i = 0; i < num_socks; i++)
821 static void tx_only(struct xdpsock *xsk)
823 int timeout, ret, nfds = 1;
824 struct pollfd fds[nfds + 1];
825 unsigned int idx = 0;
827 memset(fds, 0, sizeof(fds));
828 fds[0].fd = xsk->sfd;
829 fds[0].events = POLLOUT;
830 timeout = 1000; /* 1sn */
834 ret = poll(fds, nfds, timeout);
838 if (fds[0].fd != xsk->sfd ||
839 !(fds[0].revents & POLLOUT))
843 if (xq_nb_free(&xsk->tx, BATCH_SIZE) >= BATCH_SIZE) {
844 lassert(xq_enq_tx_only(&xsk->tx, idx, BATCH_SIZE) == 0);
846 xsk->outstanding_tx += BATCH_SIZE;
851 complete_tx_only(xsk);
855 static void l2fwd(struct xdpsock *xsk)
858 struct xdp_desc descs[BATCH_SIZE];
859 unsigned int rcvd, i;
863 complete_tx_l2fwd(xsk);
865 rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE);
870 for (i = 0; i < rcvd; i++) {
871 char *pkt = xq_get_data(xsk, descs[i].addr);
873 swap_mac_addresses(pkt);
875 hex_dump(pkt, descs[i].len, descs[i].addr);
878 xsk->rx_npkts += rcvd;
880 ret = xq_enq(&xsk->tx, descs, rcvd);
882 xsk->outstanding_tx += rcvd;
886 int main(int argc, char **argv)
888 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
889 char xdp_filename[256];
893 parse_command_line(argc, argv);
895 if (setrlimit(RLIMIT_MEMLOCK, &r)) {
896 fprintf(stderr, "ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
901 snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
903 if (load_bpf_file(xdp_filename)) {
904 fprintf(stderr, "ERROR: load_bpf_file %s\n", bpf_log_buf);
909 fprintf(stderr, "ERROR: load_bpf_file: \"%s\"\n",
914 if (bpf_set_link_xdp_fd(opt_ifindex, prog_fd[0], opt_xdp_flags) < 0) {
915 fprintf(stderr, "ERROR: link set xdp fd failed\n");
919 ret = bpf_map_update_elem(map_fd[0], &key, &opt_queue, 0);
921 fprintf(stderr, "ERROR: bpf_map_update_elem qidconf\n");
925 /* Create sockets... */
926 xsks[num_socks++] = xsk_configure(NULL);
929 for (i = 0; i < MAX_SOCKS - 1; i++)
930 xsks[num_socks++] = xsk_configure(xsks[0]->umem);
933 /* ...and insert them into the map. */
934 for (i = 0; i < num_socks; i++) {
936 ret = bpf_map_update_elem(map_fd[1], &key, &xsks[i]->sfd, 0);
938 fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
943 signal(SIGINT, int_exit);
944 signal(SIGTERM, int_exit);
945 signal(SIGABRT, int_exit);
947 setlocale(LC_ALL, "");
949 ret = pthread_create(&pt, NULL, poller, NULL);
952 prev_time = get_nsecs();
954 if (opt_bench == BENCH_RXDROP)
956 else if (opt_bench == BENCH_TXONLY)