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>
29 #include "bpf/libbpf.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")
149 #define u_smp_rmb() __asm__ __volatile__("dmb ishld": : :"memory")
150 #define u_smp_wmb() __asm__ __volatile__("dmb ishst": : :"memory")
152 #define u_smp_rmb() barrier()
153 #define u_smp_wmb() barrier()
155 #define likely(x) __builtin_expect(!!(x), 1)
156 #define unlikely(x) __builtin_expect(!!(x), 0)
158 static const char pkt_data[] =
159 "\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00"
160 "\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14"
161 "\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b"
162 "\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa";
164 static inline u32 umem_nb_free(struct xdp_umem_uqueue *q, u32 nb)
166 u32 free_entries = q->cached_cons - q->cached_prod;
168 if (free_entries >= nb)
171 /* Refresh the local tail pointer */
172 q->cached_cons = *q->consumer + q->size;
174 return q->cached_cons - q->cached_prod;
177 static inline u32 xq_nb_free(struct xdp_uqueue *q, u32 ndescs)
179 u32 free_entries = q->cached_cons - q->cached_prod;
181 if (free_entries >= ndescs)
184 /* Refresh the local tail pointer */
185 q->cached_cons = *q->consumer + q->size;
186 return q->cached_cons - q->cached_prod;
189 static inline u32 umem_nb_avail(struct xdp_umem_uqueue *q, u32 nb)
191 u32 entries = q->cached_prod - q->cached_cons;
194 q->cached_prod = *q->producer;
195 entries = q->cached_prod - q->cached_cons;
198 return (entries > nb) ? nb : entries;
201 static inline u32 xq_nb_avail(struct xdp_uqueue *q, u32 ndescs)
203 u32 entries = q->cached_prod - q->cached_cons;
206 q->cached_prod = *q->producer;
207 entries = q->cached_prod - q->cached_cons;
210 return (entries > ndescs) ? ndescs : entries;
213 static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq,
219 if (umem_nb_free(fq, nb) < nb)
222 for (i = 0; i < nb; i++) {
223 u32 idx = fq->cached_prod++ & fq->mask;
225 fq->ring[idx] = d[i].addr;
230 *fq->producer = fq->cached_prod;
235 static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u64 *d,
240 if (umem_nb_free(fq, nb) < nb)
243 for (i = 0; i < nb; i++) {
244 u32 idx = fq->cached_prod++ & fq->mask;
246 fq->ring[idx] = d[i];
251 *fq->producer = fq->cached_prod;
256 static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq,
259 u32 idx, i, entries = umem_nb_avail(cq, nb);
263 for (i = 0; i < entries; i++) {
264 idx = cq->cached_cons++ & cq->mask;
265 d[i] = cq->ring[idx];
271 *cq->consumer = cq->cached_cons;
277 static inline void *xq_get_data(struct xdpsock *xsk, u64 addr)
279 return &xsk->umem->frames[addr];
282 static inline int xq_enq(struct xdp_uqueue *uq,
283 const struct xdp_desc *descs,
286 struct xdp_desc *r = uq->ring;
289 if (xq_nb_free(uq, ndescs) < ndescs)
292 for (i = 0; i < ndescs; i++) {
293 u32 idx = uq->cached_prod++ & uq->mask;
295 r[idx].addr = descs[i].addr;
296 r[idx].len = descs[i].len;
301 *uq->producer = uq->cached_prod;
305 static inline int xq_enq_tx_only(struct xdp_uqueue *uq,
306 unsigned int id, unsigned int ndescs)
308 struct xdp_desc *r = uq->ring;
311 if (xq_nb_free(uq, ndescs) < ndescs)
314 for (i = 0; i < ndescs; i++) {
315 u32 idx = uq->cached_prod++ & uq->mask;
317 r[idx].addr = (id + i) << FRAME_SHIFT;
318 r[idx].len = sizeof(pkt_data) - 1;
323 *uq->producer = uq->cached_prod;
327 static inline int xq_deq(struct xdp_uqueue *uq,
328 struct xdp_desc *descs,
331 struct xdp_desc *r = uq->ring;
335 entries = xq_nb_avail(uq, ndescs);
339 for (i = 0; i < entries; i++) {
340 idx = uq->cached_cons++ & uq->mask;
347 *uq->consumer = uq->cached_cons;
353 static void swap_mac_addresses(void *data)
355 struct ether_header *eth = (struct ether_header *)data;
356 struct ether_addr *src_addr = (struct ether_addr *)ð->ether_shost;
357 struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
358 struct ether_addr tmp;
361 *src_addr = *dst_addr;
365 static void hex_dump(void *pkt, size_t length, u64 addr)
367 const unsigned char *address = (unsigned char *)pkt;
368 const unsigned char *line = address;
369 size_t line_size = 32;
377 sprintf(buf, "addr=%llu", addr);
378 printf("length = %zu\n", length);
379 printf("%s | ", buf);
380 while (length-- > 0) {
381 printf("%02X ", *address++);
382 if (!(++i % line_size) || (length == 0 && i % line_size)) {
384 while (i++ % line_size)
387 printf(" | "); /* right close */
388 while (line < address) {
390 printf("%c", (c < 33 || c == 255) ? 0x2E : c);
394 printf("%s | ", buf);
400 static size_t gen_eth_frame(char *frame)
402 memcpy(frame, pkt_data, sizeof(pkt_data) - 1);
403 return sizeof(pkt_data) - 1;
406 static struct xdp_umem *xdp_umem_configure(int sfd)
408 int fq_size = FQ_NUM_DESCS, cq_size = CQ_NUM_DESCS;
409 struct xdp_mmap_offsets off;
410 struct xdp_umem_reg mr;
411 struct xdp_umem *umem;
415 umem = calloc(1, sizeof(*umem));
418 lassert(posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */
419 NUM_FRAMES * FRAME_SIZE) == 0);
421 mr.addr = (__u64)bufs;
422 mr.len = NUM_FRAMES * FRAME_SIZE;
423 mr.chunk_size = FRAME_SIZE;
424 mr.headroom = FRAME_HEADROOM;
426 lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &mr, sizeof(mr)) == 0);
427 lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_FILL_RING, &fq_size,
429 lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_COMPLETION_RING, &cq_size,
432 optlen = sizeof(off);
433 lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off,
436 umem->fq.map = mmap(0, off.fr.desc +
437 FQ_NUM_DESCS * sizeof(u64),
438 PROT_READ | PROT_WRITE,
439 MAP_SHARED | MAP_POPULATE, sfd,
440 XDP_UMEM_PGOFF_FILL_RING);
441 lassert(umem->fq.map != MAP_FAILED);
443 umem->fq.mask = FQ_NUM_DESCS - 1;
444 umem->fq.size = FQ_NUM_DESCS;
445 umem->fq.producer = umem->fq.map + off.fr.producer;
446 umem->fq.consumer = umem->fq.map + off.fr.consumer;
447 umem->fq.ring = umem->fq.map + off.fr.desc;
448 umem->fq.cached_cons = FQ_NUM_DESCS;
450 umem->cq.map = mmap(0, off.cr.desc +
451 CQ_NUM_DESCS * sizeof(u64),
452 PROT_READ | PROT_WRITE,
453 MAP_SHARED | MAP_POPULATE, sfd,
454 XDP_UMEM_PGOFF_COMPLETION_RING);
455 lassert(umem->cq.map != MAP_FAILED);
457 umem->cq.mask = CQ_NUM_DESCS - 1;
458 umem->cq.size = CQ_NUM_DESCS;
459 umem->cq.producer = umem->cq.map + off.cr.producer;
460 umem->cq.consumer = umem->cq.map + off.cr.consumer;
461 umem->cq.ring = umem->cq.map + off.cr.desc;
466 if (opt_bench == BENCH_TXONLY) {
469 for (i = 0; i < NUM_FRAMES * FRAME_SIZE; i += FRAME_SIZE)
470 (void)gen_eth_frame(&umem->frames[i]);
476 static struct xdpsock *xsk_configure(struct xdp_umem *umem)
478 struct sockaddr_xdp sxdp = {};
479 struct xdp_mmap_offsets off;
480 int sfd, ndescs = NUM_DESCS;
486 sfd = socket(PF_XDP, SOCK_RAW, 0);
489 xsk = calloc(1, sizeof(*xsk));
493 xsk->outstanding_tx = 0;
497 xsk->umem = xdp_umem_configure(sfd);
502 lassert(setsockopt(sfd, SOL_XDP, XDP_RX_RING,
503 &ndescs, sizeof(int)) == 0);
504 lassert(setsockopt(sfd, SOL_XDP, XDP_TX_RING,
505 &ndescs, sizeof(int)) == 0);
506 optlen = sizeof(off);
507 lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off,
511 xsk->rx.map = mmap(NULL,
513 NUM_DESCS * sizeof(struct xdp_desc),
514 PROT_READ | PROT_WRITE,
515 MAP_SHARED | MAP_POPULATE, sfd,
517 lassert(xsk->rx.map != MAP_FAILED);
520 for (i = 0; i < NUM_DESCS * FRAME_SIZE; i += FRAME_SIZE)
521 lassert(umem_fill_to_kernel(&xsk->umem->fq, &i, 1)
526 xsk->tx.map = mmap(NULL,
528 NUM_DESCS * sizeof(struct xdp_desc),
529 PROT_READ | PROT_WRITE,
530 MAP_SHARED | MAP_POPULATE, sfd,
532 lassert(xsk->tx.map != MAP_FAILED);
534 xsk->rx.mask = NUM_DESCS - 1;
535 xsk->rx.size = NUM_DESCS;
536 xsk->rx.producer = xsk->rx.map + off.rx.producer;
537 xsk->rx.consumer = xsk->rx.map + off.rx.consumer;
538 xsk->rx.ring = xsk->rx.map + off.rx.desc;
540 xsk->tx.mask = NUM_DESCS - 1;
541 xsk->tx.size = NUM_DESCS;
542 xsk->tx.producer = xsk->tx.map + off.tx.producer;
543 xsk->tx.consumer = xsk->tx.map + off.tx.consumer;
544 xsk->tx.ring = xsk->tx.map + off.tx.desc;
545 xsk->tx.cached_cons = NUM_DESCS;
547 sxdp.sxdp_family = PF_XDP;
548 sxdp.sxdp_ifindex = opt_ifindex;
549 sxdp.sxdp_queue_id = opt_queue;
552 sxdp.sxdp_flags = XDP_SHARED_UMEM;
553 sxdp.sxdp_shared_umem_fd = umem->fd;
555 sxdp.sxdp_flags = opt_xdp_bind_flags;
558 lassert(bind(sfd, (struct sockaddr *)&sxdp, sizeof(sxdp)) == 0);
563 static void print_benchmark(bool running)
565 const char *bench_str = "INVALID";
567 if (opt_bench == BENCH_RXDROP)
568 bench_str = "rxdrop";
569 else if (opt_bench == BENCH_TXONLY)
570 bench_str = "txonly";
571 else if (opt_bench == BENCH_L2FWD)
574 printf("%s:%d %s ", opt_if, opt_queue, bench_str);
575 if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
577 else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
586 printf("running...");
591 static void dump_stats(void)
593 unsigned long now = get_nsecs();
594 long dt = now - prev_time;
599 for (i = 0; i < num_socks; i++) {
600 char *fmt = "%-15s %'-11.0f %'-11lu\n";
601 double rx_pps, tx_pps;
603 rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) *
605 tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) *
608 printf("\n sock%d@", i);
609 print_benchmark(false);
612 printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts",
614 printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts);
615 printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts);
617 xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts;
618 xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts;
622 static void *poller(void *arg)
633 static void int_exit(int sig)
637 bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
641 static struct option long_options[] = {
642 {"rxdrop", no_argument, 0, 'r'},
643 {"txonly", no_argument, 0, 't'},
644 {"l2fwd", no_argument, 0, 'l'},
645 {"interface", required_argument, 0, 'i'},
646 {"queue", required_argument, 0, 'q'},
647 {"poll", no_argument, 0, 'p'},
648 {"shared-buffer", no_argument, 0, 's'},
649 {"xdp-skb", no_argument, 0, 'S'},
650 {"xdp-native", no_argument, 0, 'N'},
651 {"interval", required_argument, 0, 'n'},
655 static void usage(const char *prog)
658 " Usage: %s [OPTIONS]\n"
660 " -r, --rxdrop Discard all incoming packets (default)\n"
661 " -t, --txonly Only send packets\n"
662 " -l, --l2fwd MAC swap L2 forwarding\n"
663 " -i, --interface=n Run on interface n\n"
664 " -q, --queue=n Use queue n (default 0)\n"
665 " -p, --poll Use poll syscall\n"
666 " -s, --shared-buffer Use shared packet buffer\n"
667 " -S, --xdp-skb=n Use XDP skb-mod\n"
668 " -N, --xdp-native=n Enfore XDP native mode\n"
669 " -n, --interval=n Specify statistics update interval (default 1 sec).\n"
671 fprintf(stderr, str, prog);
675 static void parse_command_line(int argc, char **argv)
682 c = getopt_long(argc, argv, "rtli:q:psSNn:", long_options,
689 opt_bench = BENCH_RXDROP;
692 opt_bench = BENCH_TXONLY;
695 opt_bench = BENCH_L2FWD;
701 opt_queue = atoi(optarg);
704 opt_shared_packet_buffer = 1;
710 opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
711 opt_xdp_bind_flags |= XDP_COPY;
714 opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
717 opt_interval = atoi(optarg);
720 usage(basename(argv[0]));
724 opt_ifindex = if_nametoindex(opt_if);
726 fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
728 usage(basename(argv[0]));
732 static void kick_tx(int fd)
736 ret = sendto(fd, NULL, 0, MSG_DONTWAIT, NULL, 0);
737 if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY)
742 static inline void complete_tx_l2fwd(struct xdpsock *xsk)
744 u64 descs[BATCH_SIZE];
748 if (!xsk->outstanding_tx)
752 ndescs = (xsk->outstanding_tx > BATCH_SIZE) ? BATCH_SIZE :
755 /* re-add completed Tx buffers */
756 rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, ndescs);
758 umem_fill_to_kernel(&xsk->umem->fq, descs, rcvd);
759 xsk->outstanding_tx -= rcvd;
760 xsk->tx_npkts += rcvd;
764 static inline void complete_tx_only(struct xdpsock *xsk)
766 u64 descs[BATCH_SIZE];
769 if (!xsk->outstanding_tx)
774 rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, BATCH_SIZE);
776 xsk->outstanding_tx -= rcvd;
777 xsk->tx_npkts += rcvd;
781 static void rx_drop(struct xdpsock *xsk)
783 struct xdp_desc descs[BATCH_SIZE];
784 unsigned int rcvd, i;
786 rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE);
790 for (i = 0; i < rcvd; i++) {
791 char *pkt = xq_get_data(xsk, descs[i].addr);
793 hex_dump(pkt, descs[i].len, descs[i].addr);
796 xsk->rx_npkts += rcvd;
798 umem_fill_to_kernel_ex(&xsk->umem->fq, descs, rcvd);
801 static void rx_drop_all(void)
803 struct pollfd fds[MAX_SOCKS + 1];
804 int i, ret, timeout, nfds = 1;
806 memset(fds, 0, sizeof(fds));
808 for (i = 0; i < num_socks; i++) {
809 fds[i].fd = xsks[i]->sfd;
810 fds[i].events = POLLIN;
811 timeout = 1000; /* 1sn */
816 ret = poll(fds, nfds, timeout);
821 for (i = 0; i < num_socks; i++)
826 static void tx_only(struct xdpsock *xsk)
828 int timeout, ret, nfds = 1;
829 struct pollfd fds[nfds + 1];
830 unsigned int idx = 0;
832 memset(fds, 0, sizeof(fds));
833 fds[0].fd = xsk->sfd;
834 fds[0].events = POLLOUT;
835 timeout = 1000; /* 1sn */
839 ret = poll(fds, nfds, timeout);
843 if (fds[0].fd != xsk->sfd ||
844 !(fds[0].revents & POLLOUT))
848 if (xq_nb_free(&xsk->tx, BATCH_SIZE) >= BATCH_SIZE) {
849 lassert(xq_enq_tx_only(&xsk->tx, idx, BATCH_SIZE) == 0);
851 xsk->outstanding_tx += BATCH_SIZE;
856 complete_tx_only(xsk);
860 static void l2fwd(struct xdpsock *xsk)
863 struct xdp_desc descs[BATCH_SIZE];
864 unsigned int rcvd, i;
868 complete_tx_l2fwd(xsk);
870 rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE);
875 for (i = 0; i < rcvd; i++) {
876 char *pkt = xq_get_data(xsk, descs[i].addr);
878 swap_mac_addresses(pkt);
880 hex_dump(pkt, descs[i].len, descs[i].addr);
883 xsk->rx_npkts += rcvd;
885 ret = xq_enq(&xsk->tx, descs, rcvd);
887 xsk->outstanding_tx += rcvd;
891 int main(int argc, char **argv)
893 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
894 struct bpf_prog_load_attr prog_load_attr = {
895 .prog_type = BPF_PROG_TYPE_XDP,
897 int prog_fd, qidconf_map, xsks_map;
898 struct bpf_object *obj;
899 char xdp_filename[256];
904 parse_command_line(argc, argv);
906 if (setrlimit(RLIMIT_MEMLOCK, &r)) {
907 fprintf(stderr, "ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
912 snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
913 prog_load_attr.file = xdp_filename;
915 if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
918 fprintf(stderr, "ERROR: no program found: %s\n",
923 map = bpf_object__find_map_by_name(obj, "qidconf_map");
924 qidconf_map = bpf_map__fd(map);
925 if (qidconf_map < 0) {
926 fprintf(stderr, "ERROR: no qidconf map found: %s\n",
927 strerror(qidconf_map));
931 map = bpf_object__find_map_by_name(obj, "xsks_map");
932 xsks_map = bpf_map__fd(map);
934 fprintf(stderr, "ERROR: no xsks map found: %s\n",
939 if (bpf_set_link_xdp_fd(opt_ifindex, prog_fd, opt_xdp_flags) < 0) {
940 fprintf(stderr, "ERROR: link set xdp fd failed\n");
944 ret = bpf_map_update_elem(qidconf_map, &key, &opt_queue, 0);
946 fprintf(stderr, "ERROR: bpf_map_update_elem qidconf\n");
950 /* Create sockets... */
951 xsks[num_socks++] = xsk_configure(NULL);
954 for (i = 0; i < MAX_SOCKS - 1; i++)
955 xsks[num_socks++] = xsk_configure(xsks[0]->umem);
958 /* ...and insert them into the map. */
959 for (i = 0; i < num_socks; i++) {
961 ret = bpf_map_update_elem(xsks_map, &key, &xsks[i]->sfd, 0);
963 fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
968 signal(SIGINT, int_exit);
969 signal(SIGTERM, int_exit);
970 signal(SIGABRT, int_exit);
972 setlocale(LC_ALL, "");
974 ret = pthread_create(&pt, NULL, poller, NULL);
977 prev_time = get_nsecs();
979 if (opt_bench == BENCH_RXDROP)
981 else if (opt_bench == BENCH_TXONLY)