1 /*******************************************************************************/
2 /* CAN latency tester */
3 /* Copyright (C) 2010, 2011, 2012, 2013, 2014 Michal Sojka, DCE FEE CTU Prague */
5 /*******************************************************************************/
17 #include <semaphore.h>
25 #include <sys/ioctl.h>
27 #include <sys/socket.h>
30 #include <sys/types.h>
34 #include "canframelen.h"
35 #include <linux/can.h>
36 #include <linux/can/raw.h>
38 #include "histogram.h"
43 #define dbg(level, fmt, arg...) do {} while (0)
45 #define dbg(level, fmt, arg...) do { if (level <= DEBUG) { printf("candping: " fmt, ## arg); } } while (0)
48 #define INTERRUPTED_SYSCALL(errno) (errno == EINTR || errno == ERESTART)
50 #define MEMSET_ZERO(obj) memset(&(obj), 0, sizeof(obj))
52 /* Global variables */
53 volatile sig_atomic_t finish_flag = 0; /* Threads should terminate. */
54 sem_t finish_sem; /* Thread signals a termination */
56 /* Command line options */
69 /* Temporary variables */
76 struct options opt = {
87 struct timespec tic, tac;
89 unsigned invalid_frame;
92 int num_interfaces = 0;
93 int count = 0; /* Number of sent messages */
94 unsigned msg_in_progress = 0;
95 int completion_pipe[2];
100 struct timespec ts_sent, ts_sent_kern;
101 struct timespec ts_rx_onwire, ts_rx_onwire_kern;
102 struct timespec ts_rx_final, ts_rx_final_kern;
103 struct can_frame sent, received;
104 unsigned lat_measured_us, tx_time_us;
107 #define MAX_INFOS 10000
108 struct msg_info msg_infos[MAX_INFOS];
110 struct histogram histogram, histogram_gw;
112 void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
113 /* documentation see lib.h */
116 int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
118 if (cf->can_id & CAN_ERR_FLAG) {
119 sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
121 } else if (cf->can_id & CAN_EFF_FLAG) {
122 sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
125 sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
129 if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
130 sprintf(buf+offset, "R");
132 for (i = 0; i < dlc; i++) {
133 sprintf(buf+offset, "%02X", cf->data[i]);
135 if (sep && (i+1 < dlc))
136 sprintf(buf+offset++, ".");
140 static inline uint16_t frame_index(struct can_frame *frame)
143 if (frame->can_dlc >= 2) {
144 memcpy(&idx, frame->data, sizeof(idx));
145 if (idx >= MAX_INFOS)
146 error(1, 0, "%s idx too high", __FUNCTION__);
149 error(1, 0, "%s error", __FUNCTION__);
154 static inline struct msg_info *frame2info(struct can_frame *frame)
156 return &msg_infos[frame_index(frame)];
159 static inline char *tstamp_str(const void *ctx, struct timespec *tstamp)
161 return talloc_asprintf(ctx, "%ld.%06ld",
162 tstamp->tv_sec, tstamp->tv_nsec/1000);
165 int timespec_subtract (struct timespec *result, struct timespec *x, struct timespec *yy);
167 void msg_info_print(FILE *f, struct msg_info *mi)
169 struct timespec diff;
170 void *local = talloc_new (NULL);
172 char sent[64], received[64];
177 sprint_canframe(sent, &mi->sent, true);
178 sprint_canframe(received, &mi->received, true);
180 #define S(ts) tstamp_str(local, &ts)
181 #define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
183 switch (num_interfaces) {
185 fprintf(f, "%ld: %s %s -> %s (%s) %s = %s (%s) %d\n",
186 num, S(mi->ts_sent), sent, S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
187 DIFF(mi->ts_sent, mi->ts_rx_final_kern),
188 DIFF(mi->ts_sent, mi->ts_rx_final),
192 fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s) %d\n",
193 num, S(mi->ts_sent), sent,
194 S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
195 S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
196 DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
197 DIFF(mi->ts_sent, mi->ts_rx_onwire),
198 DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
199 DIFF(mi->ts_rx_onwire, mi->ts_rx_final),
209 /* Subtract the `struct timespec' values X and Y, storing the result in
210 RESULT. Return 1 if the difference is negative, otherwise 0. */
212 int timespec_subtract (struct timespec *result, struct timespec *x, struct timespec *yy)
214 struct timespec ylocal = *yy, *y = &ylocal;
215 /* Perform the carry for the later subtraction by updating Y. */
216 if (x->tv_nsec < y->tv_nsec) {
217 int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
218 y->tv_nsec -= 1000000000 * nsec;
221 if (x->tv_nsec - y->tv_nsec > 1000000000) {
222 int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
223 y->tv_nsec += 1000000000 * nsec;
227 /* Compute the time remaining to wait.
228 `tv_nsec' is certainly positive. */
229 result->tv_sec = x->tv_sec - y->tv_sec;
230 result->tv_nsec = x->tv_nsec - y->tv_nsec;
232 /* Return 1 if result is negative. */
233 return x->tv_sec < y->tv_sec;
236 void dbg_print_timespec(char *msg, struct timespec *tv)
239 printf("%s sec=%ld nsec=%ld\n", msg, tv->tv_sec, tv->tv_nsec);
242 static inline void calc_msg_latencies(struct msg_info *mi)
244 struct timespec diff;
245 switch (num_interfaces) {
248 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
250 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
254 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
256 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
261 mi->lat_measured_us = diff.tv_sec * 1000000 + diff.tv_nsec/1000;
262 mi->tx_time_us = calc_frame_length(&mi->received);
265 void set_sched_policy_and_prio(int policy, int rtprio)
267 struct sched_param scheduling_parameters;
268 int maxprio=sched_get_priority_max(policy);
269 int minprio=sched_get_priority_min(policy);
271 if((rtprio < minprio) || (rtprio > maxprio))
272 error(1, 0, "The priority for requested policy is out of <%d, %d> range\n",
275 scheduling_parameters.sched_priority = rtprio;
277 if (0 != pthread_setschedparam(pthread_self(), policy, &scheduling_parameters))
278 error(1, errno, "pthread_setschedparam error");
281 void term_handler(int signum)
286 static inline int sock_get_if_index(int s, const char *if_name)
291 strcpy(ifr.ifr_name, if_name);
292 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
293 error(1, errno, "SIOCGIFINDEX '%s'", if_name);
294 return ifr.ifr_ifindex;
297 static inline void get_tstamp(struct timespec *ts)
299 clock_gettime(CLOCK_REALTIME, ts);
313 debugfs = "/sys/kernel/debug";
315 strcpy(path, debugfs);
316 strcat(path,"/tracing/tracing_on");
317 trace_fd = open(path, O_WRONLY);
319 write(trace_fd, "1", 1);
321 strcpy(path, debugfs);
322 strcat(path,"/tracing/trace_marker");
323 marker_fd = open(path, O_WRONLY);
325 strcpy(path, debugfs);
326 strcat(path,"/tracing/set_ftrace_pid");
327 f = fopen(path, "w");
328 fprintf(f, "%d\n", getpid());
330 system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
331 system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
332 system("echo > /sys/kernel/debug/tracing/trace");
333 system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
338 static inline void trace_on()
341 write(trace_fd, "1", 1);
344 static inline void trace_off(int ret)
346 if (marker_fd >= 0) {
348 sprintf(marker, "write returned %d\n", ret);
349 write(marker_fd, marker, strlen(marker));
352 write(trace_fd, "0", 1);
355 static inline void msg_info_free(struct msg_info *mi)
360 static inline bool msg_info_used(struct msg_info *mi)
365 int send_frame(int socket)
367 struct can_frame frame;
370 static int curr_msg = -1;
376 while (msg_info_used(&msg_infos[i]) && i != curr_msg) {
382 error(1, 0, "Msg info table is full! Probably, many packets were lost.");
386 frame.can_id = opt.id;
388 error(1, 0, "Length < 2 is not yet supported");
389 frame.can_dlc = opt.length;
391 memcpy(frame.data, &idx, sizeof(idx));
392 mi = frame2info(&frame);
394 mi->id = frame.can_id;
395 mi->length = frame.can_dlc;
396 get_tstamp(&mi->ts_sent);
400 ret = write(socket, &frame, sizeof(frame));
403 if (ret == -1 || num_interfaces == 1)
408 static inline void send_and_check(int s)
412 if (ret != sizeof(struct can_frame)) {
413 /* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
414 /* stats.enobufs++; */
415 /* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
417 error(1, errno, "send_frame (line %d)", __LINE__);
424 static inline void get_next_timeout(struct timespec *timeout)
427 static struct timespec last = {-1, 0 };
429 clock_gettime(CLOCK_MONOTONIC, &now);
431 if (last.tv_sec == -1)
433 if (opt.period_us != 0) {
434 last.tv_sec += opt.period_us/1000000;
435 last.tv_nsec += (opt.period_us%1000000)*1000;
436 while (last.tv_nsec >= 1000000000) {
437 last.tv_nsec -= 1000000000;
440 if (timespec_subtract(timeout, &last, &now) /* is negative */) {
442 memset(timeout, 0, sizeof(*timeout));
444 } else if (opt.timeout_ms != 0) {
445 timeout->tv_sec = opt.timeout_ms/1000;
446 timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
448 error(1, 0, "Timeout and period cannot be both zero");
451 void receive(int s, struct can_frame *frame, struct timespec *ts_kern, struct timespec *ts_user)
453 char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
456 struct cmsghdr *cmsg;
457 struct sockaddr_can addr;
459 static uint64_t dropcnt = 0;
461 iov.iov_base = frame;
462 msg.msg_name = &addr;
465 msg.msg_control = &ctrlmsg;
467 /* these settings may be modified by recvmsg() */
468 iov.iov_len = sizeof(*frame);
469 msg.msg_namelen = sizeof(addr);
470 msg.msg_controllen = sizeof(ctrlmsg);
473 nbytes = recvmsg(s, &msg, 0);
475 error(1, errno, "recvmsg");
477 if (nbytes < sizeof(struct can_frame))
478 error(1, 0, "recvmsg: incomplete CAN frame\n");
481 MEMSET_ZERO(*ts_kern);
482 for (cmsg = CMSG_FIRSTHDR(&msg);
483 cmsg && (cmsg->cmsg_level == SOL_SOCKET);
484 cmsg = CMSG_NXTHDR(&msg,cmsg)) {
485 if (cmsg->cmsg_type == SO_TIMESTAMPNS)
486 memcpy(ts_kern, CMSG_DATA(cmsg), sizeof(struct timespec));
487 else if (cmsg->cmsg_type == SO_RXQ_OVFL) {
489 memcpy(&ovfl, CMSG_DATA(cmsg), sizeof(ovfl));
496 void process_tx(int s)
498 error(1, 0, "%s: not implemented", __FUNCTION__);
501 void process_on_wire_rx(int s)
503 struct timespec ts_kern, ts_user;
504 struct can_frame frame;
506 receive(s, &frame, &ts_kern, &ts_user);
507 mi = frame2info(&frame);
508 if (msg_info_used(mi)) {
509 mi->ts_rx_onwire_kern = ts_kern;
510 mi->ts_rx_onwire = ts_user;
512 stats.invalid_frame++;
516 void process_final_rx(int s)
518 struct timespec ts_kern, ts_user;
519 struct can_frame frame;
523 receive(s, &frame, &ts_kern, &ts_user);
524 mi = frame2info(&frame);
525 mi->ts_rx_final_kern = ts_kern;
526 mi->ts_rx_final = ts_user;
527 mi->received = frame;
529 calc_msg_latencies(mi);
531 histogram_add(&histogram, mi->lat_measured_us);
532 histogram_add(&histogram_gw, mi->lat_measured_us - mi->tx_time_us);
534 ret = write(completion_pipe[1], &mi, sizeof(mi));
536 error(1, errno, "completion_pipe write");
539 void *measure_thread(void *arg)
542 struct pollfd pfd[3];
543 struct timespec timeout;
544 struct sockaddr_can addr;
545 int consecutive_timeouts = 0;
549 for (i=0; i<num_interfaces; i++) {
550 if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0)
551 error(1, errno, "socket");
553 addr.can_family = AF_CAN;
554 addr.can_ifindex = sock_get_if_index(s, opt.interface[i]);
556 if (i == 0) { /* TX socket */
557 /* disable default receive filter on this RAW socket */
558 /* This is obsolete as we do not read from the socket at all, but for */
559 /* this reason we can remove the receive list in the Kernel to save a */
560 /* little (really a very little!) CPU usage. */
561 if (setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0) == -1)
562 error(1, errno, "SOL_CAN_RAW");
565 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
566 error(1, errno, "bind");
568 const int timestamp_on = 1;
569 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS,
570 ×tamp_on, sizeof(timestamp_on)) < 0)
571 error(1, errno, "setsockopt SO_TIMESTAMP");
573 const int dropmonitor_on = 1;
574 if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
575 &dropmonitor_on, sizeof(dropmonitor_on)) < 0)
576 error(1, errno, "setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
580 pfd[i].events = POLLIN | POLLERR | ((opt.period_us == 0 && !opt.oneattime) ? POLLOUT : 0);
582 pfd[i].events = POLLIN;
585 set_sched_policy_and_prio(SCHED_FIFO, 40);
587 #define SEND() send_and_check(pfd[0].fd)
592 get_tstamp(&stats.tic);
594 while (!finish_flag &&
595 (opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
597 get_next_timeout(&timeout);
598 //printf("ppoll"); fflush(stdout);
599 ret = ppoll(pfd, num_interfaces, &timeout, NULL);
600 //printf("=%d\n", ret);
603 if (!INTERRUPTED_SYSCALL(errno))
604 error(1, errno, "ppoll");
608 if (opt.count == 0 || count < opt.count) {
612 /* Lost message - send a new one */
614 consecutive_timeouts++;
615 if (consecutive_timeouts < 10)
617 else /* Something is really broken */
622 if (pfd[0].revents & (POLLIN|POLLERR)) {
623 process_tx(pfd[0].fd);
625 if (pfd[0].revents & POLLOUT) {
626 if (opt.count == 0 || count < opt.count)
631 if (num_interfaces == 3 && pfd[1].revents & POLLIN) {
632 process_on_wire_rx(pfd[1].fd);
635 if (num_interfaces == 3 && pfd[1].revents & ~POLLIN)
636 error(1, 0, "Unexpected pfd[1].revents: 0x%04x\n", pfd[1].revents);
638 i = (num_interfaces == 2) ? 1 : 2;
639 if (pfd[i].revents & POLLIN) {
640 consecutive_timeouts = 0;
641 process_final_rx(pfd[i].fd);
644 if ((opt.count == 0 || count < opt.count) &&
649 if (pfd[i].revents & ~POLLIN)
650 error(1, 0, "Unexpected pfd[%d].revents: 0x%04x\n", i, pfd[i].revents);
654 get_tstamp(&stats.tac);
656 for (i=0; i<num_interfaces; i++)
662 struct poptOption optionsTable[] = {
663 { "device", 'd', POPT_ARG_ARGV, &opt.interface, 'd', "Interface to use. Must be given two times (tx, rx) or three times (tx, rx1, rx2)", "interface" },
664 { "count", 'c', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.count, 0, "The count of messages to send, zero corresponds to infinity", "num"},
665 { "id", 'i', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.id, 0, "CAN ID of sent messages", "id"},
666 { "period", 'p', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.period_us, 0, "Period for sending messages or zero (default) to send as fast as possible", "us"},
667 { "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
668 { "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
669 { "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
670 { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
671 { "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
672 { "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
673 { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
675 { NULL, 0, 0, NULL, 0 }
678 int parse_options(int argc, const char *argv[])
681 poptContext optCon; /* context for parsing command-line options */
682 void *local = talloc_new (NULL);
684 optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
685 //poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
687 /* Now do options processing */
688 while ((c = poptGetNextOpt(optCon)) >= 0) {
696 error(1, 0, "%s: %s\n",
697 poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
700 if (num_interfaces < 1 || num_interfaces > 3)
701 error(1, 0, "-d option must only be given one, two or three times");
703 if (opt.oneattime && opt.period_us)
704 error(1, 0, "oneattime and period cannot be specified at the same time");
707 char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
708 opt.f_msgs = fopen(f, "w");
710 error(1, errno, "fopen: %s", f);
714 char *f = talloc_asprintf(local, "%s-hist-raw.txt", opt.name);
715 opt.f_hist = fopen(f, "w");
717 error(1, errno, "fopen: %s", f);
721 char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
722 opt.f_hist_gw = fopen(f, "w");
724 error(1, errno, "fopen: %s", f);
728 char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
729 opt.f_stat = fopen(f, "w");
731 error(1, errno, "fopen: %s", f);
734 poptFreeContext(optCon);
739 void print_progress()
742 if (num_interfaces > 1)
743 printf("\rSent %5d, in progress %5d", count, msg_in_progress);
745 printf("\rSent %5d", count);
750 int main(int argc, const char *argv[])
755 parse_options(argc, argv);
757 mlockall(MCL_CURRENT | MCL_FUTURE);
759 signal(SIGINT, term_handler);
760 signal(SIGTERM, term_handler);
762 for (i=0; i<MAX_INFOS; i++)
763 msg_infos[i].id = -1;
765 histogram_init(&histogram, 5000000, 1);
766 histogram_init(&histogram_gw, 5000000, 1);
768 ret = pipe(completion_pipe);
770 error(1, errno, "pipe");
771 ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
773 error(1, errno, "pipe fcntl");
776 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
778 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -CONT -%s'",
779 getenv("LATESTER_CONTROL_HACKBENCH"));
780 printf("Running: %s\n", cmd);
784 pthread_create(&thread, 0, measure_thread, NULL);
786 struct timespec next, now, diff, allsent = {0,0};
787 clock_gettime(CLOCK_MONOTONIC, &next);
789 while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
790 struct pollfd pfd[1];
791 pfd[0].fd = completion_pipe[0];
792 pfd[0].events = POLLIN;
793 ret = poll(pfd, 1, 100);
794 if (ret == -1 && !INTERRUPTED_SYSCALL(errno))
795 error(1, errno, "poll main");
796 if (ret > 0 && (pfd[0].revents & POLLIN)) {
799 ret = read(completion_pipe[0], &mi, sizeof(mi));
800 if (ret < sizeof(mi))
801 error(1, errno, "read completion returned %d", ret);
802 msg_info_print(opt.f_msgs, mi);
807 clock_gettime(CLOCK_MONOTONIC, &now);
808 if (timespec_subtract(&diff, &next, &now)) {
810 next.tv_nsec += 100000000;
811 while (next.tv_nsec >= 1000000000) {
812 next.tv_nsec -= 1000000000;
816 if (opt.count != 0 && count >= opt.count) {
817 if (allsent.tv_sec == 0)
819 timespec_subtract(&diff, &now, &allsent);
820 if (diff.tv_sec >= 1)
828 stats.lost = msg_in_progress;
830 pthread_join(thread, NULL);
832 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
834 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -STOP -%s'",
835 getenv("LATESTER_CONTROL_HACKBENCH"));
836 printf("Running: %s\n", cmd);
840 close(completion_pipe[0]);
841 close(completion_pipe[1]);
843 histogram_fprint(&histogram, opt.f_hist);
844 histogram_fprint(&histogram_gw, opt.f_hist_gw);
848 fclose(opt.f_hist_gw);
853 fprintf(opt.f_stat, "cmdline='");
854 for (i=0; i<argc; i++)
855 fprintf(opt.f_stat, "%s%s", argv[i], i < argc-1 ? " " : "");
856 fprintf(opt.f_stat, "'\n");
858 timespec_subtract(&diff, &stats.tac, &stats.tic);
859 fprintf(opt.f_stat, "duration=%s # seconds\n", tstamp_str(NULL, &diff));
861 fprintf(opt.f_stat, "sent=%d\n", count);
862 fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
863 if (stats.overrun && !opt.quiet)
864 printf("overrun=%d\n", stats.overrun);
865 fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
866 if (stats.enobufs && !opt.quiet)
867 printf("enobufs=%d\n", stats.enobufs);
868 fprintf(opt.f_stat, "lost=%d\n", stats.lost);
869 if (stats.lost && !opt.quiet)
870 printf("lost=%d\n", stats.lost);
871 fprintf(opt.f_stat, "timeouts=%d\n", stats.timeouts);
872 if (stats.timeouts && !opt.quiet)
873 printf("timeouts=%d\n", stats.timeouts);
874 fprintf(opt.f_stat, "invalid_frame=%d\n", stats.timeouts);
875 if (stats.timeouts && !opt.quiet)
876 printf("invalid_frame=%d\n", stats.timeouts);