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, routing_delay, tx_time;
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),
193 tx_time.tv_nsec = mi->tx_time_us*1000;
194 timespec_subtract(&routing_delay, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
195 timespec_subtract(&routing_delay, &routing_delay, &tx_time);
197 fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s) %d %s\n",
198 num, S(mi->ts_sent), sent,
199 S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
200 S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
201 DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
202 DIFF(mi->ts_sent, mi->ts_rx_onwire),
203 DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
204 DIFF(mi->ts_rx_onwire, mi->ts_rx_final),
215 /* Subtract the `struct timespec' values X and Y, storing the result in
216 RESULT. Return 1 if the difference is negative, otherwise 0. */
218 int timespec_subtract (struct timespec *result, struct timespec *x, struct timespec *yy)
220 struct timespec ylocal = *yy, *y = &ylocal;
221 /* Perform the carry for the later subtraction by updating Y. */
222 if (x->tv_nsec < y->tv_nsec) {
223 int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
224 y->tv_nsec -= 1000000000 * nsec;
227 if (x->tv_nsec - y->tv_nsec > 1000000000) {
228 int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
229 y->tv_nsec += 1000000000 * nsec;
233 /* Compute the time remaining to wait.
234 `tv_nsec' is certainly positive. */
235 result->tv_sec = x->tv_sec - y->tv_sec;
236 result->tv_nsec = x->tv_nsec - y->tv_nsec;
238 /* Return 1 if result is negative. */
239 return x->tv_sec < y->tv_sec;
242 void dbg_print_timespec(char *msg, struct timespec *tv)
245 printf("%s sec=%ld nsec=%ld\n", msg, tv->tv_sec, tv->tv_nsec);
248 static inline void calc_msg_latencies(struct msg_info *mi)
250 struct timespec diff;
251 switch (num_interfaces) {
254 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
256 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
260 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
262 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
267 mi->lat_measured_us = diff.tv_sec * 1000000 + diff.tv_nsec/1000;
268 mi->tx_time_us = calc_frame_length(&mi->received);
271 void set_sched_policy_and_prio(int policy, int rtprio)
273 struct sched_param scheduling_parameters;
274 int maxprio=sched_get_priority_max(policy);
275 int minprio=sched_get_priority_min(policy);
277 if((rtprio < minprio) || (rtprio > maxprio))
278 error(1, 0, "The priority for requested policy is out of <%d, %d> range\n",
281 scheduling_parameters.sched_priority = rtprio;
283 if (0 != pthread_setschedparam(pthread_self(), policy, &scheduling_parameters))
284 error(1, errno, "pthread_setschedparam error");
287 void term_handler(int signum)
292 static inline int sock_get_if_index(int s, const char *if_name)
297 strcpy(ifr.ifr_name, if_name);
298 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
299 error(1, errno, "SIOCGIFINDEX '%s'", if_name);
300 return ifr.ifr_ifindex;
303 static inline void get_tstamp(struct timespec *ts)
305 clock_gettime(CLOCK_REALTIME, ts);
319 debugfs = "/sys/kernel/debug";
321 strcpy(path, debugfs);
322 strcat(path,"/tracing/tracing_on");
323 trace_fd = open(path, O_WRONLY);
325 write(trace_fd, "1", 1);
327 strcpy(path, debugfs);
328 strcat(path,"/tracing/trace_marker");
329 marker_fd = open(path, O_WRONLY);
331 strcpy(path, debugfs);
332 strcat(path,"/tracing/set_ftrace_pid");
333 f = fopen(path, "w");
334 fprintf(f, "%d\n", getpid());
336 system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
337 system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
338 system("echo > /sys/kernel/debug/tracing/trace");
339 system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
344 static inline void trace_on()
347 write(trace_fd, "1", 1);
350 static inline void trace_off(int ret)
352 if (marker_fd >= 0) {
354 sprintf(marker, "write returned %d\n", ret);
355 write(marker_fd, marker, strlen(marker));
358 write(trace_fd, "0", 1);
361 static inline void msg_info_free(struct msg_info *mi)
366 static inline bool msg_info_used(struct msg_info *mi)
371 int send_frame(int socket)
373 struct can_frame frame;
376 static int curr_msg = -1;
382 while (msg_info_used(&msg_infos[i]) && i != curr_msg) {
388 error(1, 0, "Msg info table is full! Probably, many packets were lost.");
392 frame.can_id = opt.id;
394 error(1, 0, "Length < 2 is not yet supported");
395 frame.can_dlc = opt.length;
397 memcpy(frame.data, &idx, sizeof(idx));
398 mi = frame2info(&frame);
400 mi->id = frame.can_id;
401 mi->length = frame.can_dlc;
402 get_tstamp(&mi->ts_sent);
406 ret = write(socket, &frame, sizeof(frame));
409 if (ret == -1 || num_interfaces == 1)
414 static inline void send_and_check(int s)
418 if (ret != sizeof(struct can_frame)) {
419 /* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
420 /* stats.enobufs++; */
421 /* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
423 error(1, errno, "send_frame (line %d)", __LINE__);
430 static inline void get_next_timeout(struct timespec *timeout, bool advance)
433 static struct timespec last = {-1, 0 };
435 clock_gettime(CLOCK_MONOTONIC, &now);
437 if (last.tv_sec == -1) {
439 last.tv_nsec = last.tv_nsec/1000000*1000000;
441 if (opt.period_us != 0) {
443 last.tv_sec += opt.period_us/1000000;
444 last.tv_nsec += (opt.period_us%1000000)*1000;
445 while (last.tv_nsec >= 1000000000) {
446 last.tv_nsec -= 1000000000;
450 if (timespec_subtract(timeout, &last, &now) /* is negative */) {
452 memset(timeout, 0, sizeof(*timeout));
454 /* printf("next %ld.%06ld now %ld.%06ld --> timeout %ld.%06ld\n", */
455 /* last.tv_sec, last.tv_nsec/1000, */
456 /* now.tv_sec, now.tv_nsec/1000, */
457 /* timeout->tv_sec, timeout->tv_nsec/1000); */
458 } else if (opt.timeout_ms != 0) {
459 timeout->tv_sec = opt.timeout_ms/1000;
460 timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
462 error(1, 0, "Timeout and period cannot be both zero");
465 void receive(int s, struct can_frame *frame, struct timespec *ts_kern, struct timespec *ts_user)
467 char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
470 struct cmsghdr *cmsg;
471 struct sockaddr_can addr;
473 static uint64_t dropcnt = 0;
475 iov.iov_base = frame;
476 msg.msg_name = &addr;
479 msg.msg_control = &ctrlmsg;
481 /* these settings may be modified by recvmsg() */
482 iov.iov_len = sizeof(*frame);
483 msg.msg_namelen = sizeof(addr);
484 msg.msg_controllen = sizeof(ctrlmsg);
487 nbytes = recvmsg(s, &msg, 0);
489 error(1, errno, "recvmsg");
491 if (nbytes < sizeof(struct can_frame))
492 error(1, 0, "recvmsg: incomplete CAN frame\n");
495 MEMSET_ZERO(*ts_kern);
496 for (cmsg = CMSG_FIRSTHDR(&msg);
497 cmsg && (cmsg->cmsg_level == SOL_SOCKET);
498 cmsg = CMSG_NXTHDR(&msg,cmsg)) {
499 if (cmsg->cmsg_type == SO_TIMESTAMPNS)
500 memcpy(ts_kern, CMSG_DATA(cmsg), sizeof(struct timespec));
501 else if (cmsg->cmsg_type == SO_RXQ_OVFL) {
503 memcpy(&ovfl, CMSG_DATA(cmsg), sizeof(ovfl));
510 void process_tx(int s)
512 error(1, 0, "%s: not implemented", __FUNCTION__);
515 void process_on_wire_rx(int s)
517 struct timespec ts_kern, ts_user;
518 struct can_frame frame;
520 receive(s, &frame, &ts_kern, &ts_user);
521 mi = frame2info(&frame);
522 if (msg_info_used(mi)) {
523 mi->ts_rx_onwire_kern = ts_kern;
524 mi->ts_rx_onwire = ts_user;
526 stats.invalid_frame++;
530 void process_final_rx(int s)
532 struct timespec ts_kern, ts_user;
533 struct can_frame frame;
537 receive(s, &frame, &ts_kern, &ts_user);
538 mi = frame2info(&frame);
539 mi->ts_rx_final_kern = ts_kern;
540 mi->ts_rx_final = ts_user;
541 mi->received = frame;
543 calc_msg_latencies(mi);
545 histogram_add(&histogram, mi->lat_measured_us);
546 histogram_add(&histogram_gw, mi->lat_measured_us - mi->tx_time_us);
548 ret = write(completion_pipe[1], &mi, sizeof(mi));
550 error(1, errno, "completion_pipe write");
553 void *measure_thread(void *arg)
556 struct pollfd pfd[3];
557 struct timespec timeout;
558 struct sockaddr_can addr;
559 int consecutive_timeouts = 0;
563 for (i=0; i<num_interfaces; i++) {
564 if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0)
565 error(1, errno, "socket");
567 addr.can_family = AF_CAN;
568 addr.can_ifindex = sock_get_if_index(s, opt.interface[i]);
570 if (i == 0) { /* TX socket */
571 /* disable default receive filter on this RAW socket */
572 /* This is obsolete as we do not read from the socket at all, but for */
573 /* this reason we can remove the receive list in the Kernel to save a */
574 /* little (really a very little!) CPU usage. */
575 if (setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0) == -1)
576 error(1, errno, "SOL_CAN_RAW");
579 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
580 error(1, errno, "bind");
582 const int timestamp_on = 1;
583 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS,
584 ×tamp_on, sizeof(timestamp_on)) < 0)
585 error(1, errno, "setsockopt SO_TIMESTAMP");
587 const int dropmonitor_on = 1;
588 if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
589 &dropmonitor_on, sizeof(dropmonitor_on)) < 0)
590 error(1, errno, "setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
594 pfd[i].events = POLLIN | POLLERR | ((opt.period_us == 0 && !opt.oneattime) ? POLLOUT : 0);
596 pfd[i].events = POLLIN;
599 set_sched_policy_and_prio(SCHED_FIFO, 40);
601 #define SEND() send_and_check(pfd[0].fd)
606 get_tstamp(&stats.tic);
608 while (!finish_flag &&
609 (opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
611 get_next_timeout(&timeout, ret == 0);
612 //printf("timeout %ld.%06ld\n", timeout.tv_sec, timeout.tv_nsec/1000);
613 //printf("ppoll"); fflush(stdout);
614 ret = ppoll(pfd, num_interfaces, &timeout, NULL);
615 //printf("=%d\n", ret);
618 if (!INTERRUPTED_SYSCALL(errno))
619 error(1, errno, "ppoll");
623 if (opt.count == 0 || count < opt.count) {
627 /* Lost message - send a new one */
629 consecutive_timeouts++;
630 if (consecutive_timeouts < 10)
632 else /* Something is really broken */
637 if (pfd[0].revents & (POLLIN|POLLERR)) {
638 process_tx(pfd[0].fd);
640 if (pfd[0].revents & POLLOUT) {
641 if (opt.count == 0 || count < opt.count)
646 if (num_interfaces == 3 && pfd[1].revents & POLLIN) {
647 process_on_wire_rx(pfd[1].fd);
650 if (num_interfaces == 3 && pfd[1].revents & ~POLLIN)
651 error(1, 0, "Unexpected pfd[1].revents: 0x%04x\n", pfd[1].revents);
653 i = (num_interfaces == 2) ? 1 : 2;
654 if (pfd[i].revents & POLLIN) {
655 consecutive_timeouts = 0;
656 process_final_rx(pfd[i].fd);
659 if ((opt.count == 0 || count < opt.count) &&
664 if (pfd[i].revents & ~POLLIN)
665 error(1, 0, "Unexpected pfd[%d].revents: 0x%04x\n", i, pfd[i].revents);
669 get_tstamp(&stats.tac);
671 for (i=0; i<num_interfaces; i++)
677 struct poptOption optionsTable[] = {
678 { "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" },
679 { "count", 'c', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.count, 0, "The count of messages to send, zero corresponds to infinity", "num"},
680 { "id", 'i', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.id, 0, "CAN ID of sent messages", "id"},
681 { "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"},
682 { "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
683 { "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
684 { "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
685 { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
686 { "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
687 { "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
688 { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
690 { NULL, 0, 0, NULL, 0 }
693 int parse_options(int argc, const char *argv[])
696 poptContext optCon; /* context for parsing command-line options */
697 void *local = talloc_new (NULL);
699 optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
700 //poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
702 /* Now do options processing */
703 while ((c = poptGetNextOpt(optCon)) >= 0) {
711 error(1, 0, "%s: %s\n",
712 poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
715 if (num_interfaces < 1 || num_interfaces > 3)
716 error(1, 0, "-d option must only be given one, two or three times");
718 if (opt.oneattime && opt.period_us)
719 error(1, 0, "oneattime and period cannot be specified at the same time");
722 char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
723 opt.f_msgs = fopen(f, "w");
725 error(1, errno, "fopen: %s", f);
729 char *f = talloc_asprintf(local, "%s-hist-raw.txt", opt.name);
730 opt.f_hist = fopen(f, "w");
732 error(1, errno, "fopen: %s", f);
736 char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
737 opt.f_hist_gw = fopen(f, "w");
739 error(1, errno, "fopen: %s", f);
743 char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
744 opt.f_stat = fopen(f, "w");
746 error(1, errno, "fopen: %s", f);
749 poptFreeContext(optCon);
754 void print_progress()
757 if (num_interfaces > 1)
758 printf("\rSent %5d, in progress %5d", count, msg_in_progress);
760 printf("\rSent %5d", count);
765 int main(int argc, const char *argv[])
770 parse_options(argc, argv);
772 mlockall(MCL_CURRENT | MCL_FUTURE);
774 signal(SIGINT, term_handler);
775 signal(SIGTERM, term_handler);
777 for (i=0; i<MAX_INFOS; i++)
778 msg_infos[i].id = -1;
780 histogram_init(&histogram, 5000000, 1);
781 histogram_init(&histogram_gw, 5000000, 1);
783 ret = pipe(completion_pipe);
785 error(1, errno, "pipe");
786 ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
788 error(1, errno, "pipe fcntl");
791 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
793 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -CONT -%s'",
794 getenv("LATESTER_CONTROL_HACKBENCH"));
795 printf("Running: %s\n", cmd);
799 pthread_create(&thread, 0, measure_thread, NULL);
801 struct timespec next, now, diff, allsent = {0,0};
802 clock_gettime(CLOCK_MONOTONIC, &next);
804 while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
805 struct pollfd pfd[1];
806 pfd[0].fd = completion_pipe[0];
807 pfd[0].events = POLLIN;
808 ret = poll(pfd, 1, 100);
809 if (ret == -1 && !INTERRUPTED_SYSCALL(errno))
810 error(1, errno, "poll main");
811 if (ret > 0 && (pfd[0].revents & POLLIN)) {
814 ret = read(completion_pipe[0], &mi, sizeof(mi));
815 if (ret < sizeof(mi))
816 error(1, errno, "read completion returned %d", ret);
817 msg_info_print(opt.f_msgs, mi);
822 clock_gettime(CLOCK_MONOTONIC, &now);
823 if (timespec_subtract(&diff, &next, &now)) {
825 next.tv_nsec += 100000000;
826 while (next.tv_nsec >= 1000000000) {
827 next.tv_nsec -= 1000000000;
831 if (opt.count != 0 && count >= opt.count) {
832 if (allsent.tv_sec == 0)
834 timespec_subtract(&diff, &now, &allsent);
835 if (diff.tv_sec >= 1)
843 stats.lost = msg_in_progress;
845 pthread_join(thread, NULL);
847 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
849 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -STOP -%s'",
850 getenv("LATESTER_CONTROL_HACKBENCH"));
851 printf("Running: %s\n", cmd);
855 close(completion_pipe[0]);
856 close(completion_pipe[1]);
858 histogram_fprint(&histogram, opt.f_hist);
859 histogram_fprint(&histogram_gw, opt.f_hist_gw);
863 fclose(opt.f_hist_gw);
868 struct histogram_stats hs;
869 fprintf(opt.f_stat, "cmdline='");
870 for (i=0; i<argc; i++)
871 fprintf(opt.f_stat, "%s%s", argv[i], i < argc-1 ? " " : "");
872 fprintf(opt.f_stat, "'\n");
874 timespec_subtract(&diff, &stats.tac, &stats.tic);
875 fprintf(opt.f_stat, "duration=%s # seconds\n", tstamp_str(NULL, &diff));
877 fprintf(opt.f_stat, "sent=%d\n", count);
878 fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
879 if (stats.overrun && !opt.quiet)
880 printf("overrun=%d\n", stats.overrun);
881 fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
882 if (stats.enobufs && !opt.quiet)
883 printf("enobufs=%d\n", stats.enobufs);
884 fprintf(opt.f_stat, "lost=%d\n", stats.lost);
885 if (stats.lost && !opt.quiet)
886 printf("lost=%d\n", stats.lost);
887 fprintf(opt.f_stat, "timeouts=%d\n", stats.timeouts);
888 if (stats.timeouts && !opt.quiet)
889 printf("timeouts=%d\n", stats.timeouts);
890 fprintf(opt.f_stat, "invalid_frame=%d\n", stats.timeouts);
891 if (stats.timeouts && !opt.quiet)
892 printf("invalid_frame=%d\n", stats.timeouts);
894 histogram_stats(&histogram_gw, &hs);
895 double avg = hs.count ? (double)hs.sum/hs.count : 0;
896 fprintf(opt.f_stat, "avg=%g\n", avg);
897 for (i = 0; i <= 20; i++)
898 fprintf(opt.f_stat, "percentile%d=%d\n", i*5, hs.percentile[i*5]);