1 /**************************************************************************/
2 /* CAN latency tester */
3 /* Copyright (C) 2010, 2011 Michal Sojka, DCE FEE CTU Prague */
5 /**************************************************************************/
16 #include <semaphore.h>
24 #include <sys/ioctl.h>
26 #include <sys/socket.h>
29 #include <sys/types.h>
33 #include <linux/can.h>
34 #include <linux/can/raw.h>
36 #include "histogram.h"
41 #define dbg(level, fmt, arg...) do {} while (0)
43 #define dbg(level, fmt, arg...) do { if (level <= DEBUG) { printf("candping: " fmt, ## arg); } } while (0)
46 #define INTERRUPTED_SYSCALL(errno) (errno == EINTR || errno == ERESTART)
48 #define MEMSET_ZERO(obj) memset(&(obj), 0, sizeof(obj))
50 /* Global variables */
51 volatile sig_atomic_t finish_flag = 0; /* Threads should terminate. */
52 sem_t finish_sem; /* Thread signals a termination */
54 /* Command line options */
67 /* Temporary variables */
73 struct options opt = {
84 struct timespec tic, tac;
86 unsigned invalid_frame;
89 int num_interfaces = 0;
90 int count = 0; /* Number of sent messages */
91 unsigned msg_in_progress = 0;
92 int completion_pipe[2];
97 struct timespec ts_sent, ts_sent_kern;
98 struct timespec ts_rx_onwire, ts_rx_onwire_kern;
99 struct timespec ts_rx_final, ts_rx_final_kern;
100 struct can_frame sent, received;
103 #define MAX_INFOS 10000
104 struct msg_info msg_infos[MAX_INFOS];
106 struct histogram histogram;
108 void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
109 /* documentation see lib.h */
112 int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
114 if (cf->can_id & CAN_ERR_FLAG) {
115 sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
117 } else if (cf->can_id & CAN_EFF_FLAG) {
118 sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
121 sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
125 if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
126 sprintf(buf+offset, "R");
128 for (i = 0; i < dlc; i++) {
129 sprintf(buf+offset, "%02X", cf->data[i]);
131 if (sep && (i+1 < dlc))
132 sprintf(buf+offset++, ".");
136 static inline uint16_t frame_index(struct can_frame *frame)
139 if (frame->can_dlc >= 2) {
140 memcpy(&idx, frame->data, sizeof(idx));
141 if (idx >= MAX_INFOS)
142 error(1, 0, "%s idx too high", __FUNCTION__);
145 error(1, 0, "%s error", __FUNCTION__);
150 static inline struct msg_info *frame2info(struct can_frame *frame)
152 return &msg_infos[frame_index(frame)];
155 static inline char *tstamp_str(const void *ctx, struct timespec *tstamp)
157 return talloc_asprintf(ctx, "%ld.%06ld",
158 tstamp->tv_sec, tstamp->tv_nsec/1000);
161 unsigned calc_stuff_bits(struct can_frame *frame) {
163 unsigned start = 0, end;
164 uint32_t mask, ones = 0, basemask = 0xf0000000;
165 unsigned stuffed = 0;
166 memset(bitmap, 0, sizeof(bitmap));
168 if (frame->can_id & CAN_EFF_FLAG) {
170 (frame->can_id >> 25);
172 (frame->can_id >> 18) << 25 |
174 (frame->can_id & 0x3ffff) << 7 |
175 (!!(frame->can_id & CAN_RTR_FLAG)) << 6 |
177 frame->can_dlc & 0xf;
178 bitmap[2] = htonl(((uint32_t*)frame->data)[0]);
179 bitmap[3] = htonl(((uint32_t*)frame->data)[1]);
181 end = 64 + 8*frame->can_dlc;
184 (frame->can_id << 7) |
185 (!!(frame->can_id & CAN_RTR_FLAG)) << 6 |
187 frame->can_dlc & 0xf;
188 bitmap[1] = htonl(((uint32_t*)frame->data)[0]);
189 bitmap[2] = htonl(((uint32_t*)frame->data)[1]);
191 end = 32 + 8*frame->can_dlc;
193 /* TODO: Calc stuff bits in CRC */
194 while (start < end) {
195 mask = basemask >> (start & 0x1f);
197 ones = ones ? mask : 0;
198 uint32_t chunk = (bitmap[start >> 5] & mask) ^ ones;
199 //printf("start=%d bitmap=0x%08x mask=0x%08x ones=0x%08x chunk=0x%08x\n", start, bitmap[start >> 5], mask, ones, chunk);
201 unsigned change = __builtin_clz(chunk);
202 start = start & ~0x1f | change;
203 basemask = 0xf8000000;
205 unsigned oldstart = start;
206 start += __builtin_popcount(mask);
207 mask = (oldstart & 0x1f) ? basemask << (-oldstart & 0x1f) : 0;
208 //printf("oldstart=%d shl=%d mask=0x%08x\n", oldstart, -oldstart & 0x1f, mask);
209 if (mask && start < end)
211 if (start <= end && !mask) {
213 basemask = 0xf0000000;
214 //printf("stuffed %d\n", !ones);
221 //printf ("STUFFED %d BITS\n", stuffed);
224 unsigned calc_frame_txtime(struct can_frame *frame) {
225 return calc_stuff_bits(frame) +
228 ((frame->can_id & CAN_EFF_FLAG) ?
240 3 + /* CRC del, ACK, ACK del */
244 void msg_info_print(FILE *f, struct msg_info *mi)
246 struct timespec diff;
247 void *local = talloc_new (NULL);
249 char sent[64], received[64];
251 sprint_canframe(sent, &mi->sent, true);
252 sprint_canframe(received, &mi->received, true);
254 #define S(ts) tstamp_str(local, &ts)
255 #define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
257 switch (num_interfaces) {
259 fprintf(f, "%ld: %s %s -> %s (%s) %s = %s (%s) %d\n",
260 num, S(mi->ts_sent), sent, S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
261 DIFF(mi->ts_sent, mi->ts_rx_final_kern),
262 DIFF(mi->ts_sent, mi->ts_rx_final),
263 calc_frame_txtime(&mi->received));
266 fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s) %d\n",
267 num, S(mi->ts_sent), sent,
268 S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
269 S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
270 DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
271 DIFF(mi->ts_sent, mi->ts_rx_onwire),
272 DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
273 DIFF(mi->ts_rx_onwire, mi->ts_rx_final),
274 calc_frame_txtime(&mi->received));
283 /* Subtract the `struct timespec' values X and Y, storing the result in
284 RESULT. Return 1 if the difference is negative, otherwise 0. */
286 int timespec_subtract (struct timespec *result, struct timespec *x, struct timespec *yy)
288 struct timespec ylocal = *yy, *y = &ylocal;
289 /* Perform the carry for the later subtraction by updating Y. */
290 if (x->tv_nsec < y->tv_nsec) {
291 int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
292 y->tv_nsec -= 1000000000 * nsec;
295 if (x->tv_nsec - y->tv_nsec > 1000000000) {
296 int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
297 y->tv_nsec += 1000000000 * nsec;
301 /* Compute the time remaining to wait.
302 `tv_nsec' is certainly positive. */
303 result->tv_sec = x->tv_sec - y->tv_sec;
304 result->tv_nsec = x->tv_nsec - y->tv_nsec;
306 /* Return 1 if result is negative. */
307 return x->tv_sec < y->tv_sec;
310 void dbg_print_timespec(char *msg, struct timespec *tv)
313 printf("%s sec=%ld nsec=%ld\n", msg, tv->tv_sec, tv->tv_nsec);
316 static inline unsigned get_msg_latency_us(struct msg_info *mi)
318 struct timespec diff;
319 switch (num_interfaces) {
322 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
324 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
328 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
330 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
335 return diff.tv_sec * 1000000 + diff.tv_nsec/1000;
338 void set_sched_policy_and_prio(int policy, int rtprio)
340 struct sched_param scheduling_parameters;
341 int maxprio=sched_get_priority_max(policy);
342 int minprio=sched_get_priority_min(policy);
344 if((rtprio < minprio) || (rtprio > maxprio))
345 error(1, 0, "The priority for requested policy is out of <%d, %d> range\n",
348 scheduling_parameters.sched_priority = rtprio;
350 if (0 != pthread_setschedparam(pthread_self(), policy, &scheduling_parameters))
351 error(1, errno, "pthread_setschedparam error");
354 void term_handler(int signum)
359 static inline int sock_get_if_index(int s, const char *if_name)
364 strcpy(ifr.ifr_name, if_name);
365 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
366 error(1, errno, "SIOCGIFINDEX '%s'", if_name);
367 return ifr.ifr_ifindex;
370 static inline get_tstamp(struct timespec *ts)
372 clock_gettime(CLOCK_REALTIME, ts);
386 debugfs = "/sys/kernel/debug";
388 strcpy(path, debugfs);
389 strcat(path,"/tracing/tracing_on");
390 trace_fd = open(path, O_WRONLY);
392 write(trace_fd, "1", 1);
394 strcpy(path, debugfs);
395 strcat(path,"/tracing/trace_marker");
396 marker_fd = open(path, O_WRONLY);
398 strcpy(path, debugfs);
399 strcat(path,"/tracing/set_ftrace_pid");
400 f = fopen(path, "w");
401 fprintf(f, "%d\n", getpid());
403 system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
404 system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
405 system("echo > /sys/kernel/debug/tracing/trace");
406 system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
411 static inline void trace_on()
414 write(trace_fd, "1", 1);
417 static inline void trace_off(int ret)
419 if (marker_fd >= 0) {
421 sprintf(marker, "write returned %d\n", ret);
422 write(marker_fd, marker, strlen(marker));
425 write(trace_fd, "0", 1);
428 static inline void msg_info_free(struct msg_info *mi)
433 static inline bool msg_info_used(struct msg_info *mi)
438 int send_frame(int socket)
440 struct can_frame frame;
443 static int curr_msg = -1;
449 while (msg_info_used(&msg_infos[i]) && i != curr_msg) {
455 error(1, 0, "Msg info table is full! Probably, many packets were lost.");
459 frame.can_id = opt.id;
461 error(1, 0, "Length < 2 is not yet supported");
462 frame.can_dlc = opt.length;
464 memcpy(frame.data, &idx, sizeof(idx));
465 mi = frame2info(&frame);
467 mi->id = frame.can_id;
468 mi->length = frame.can_dlc;
469 get_tstamp(&mi->ts_sent);
473 ret = write(socket, &frame, sizeof(frame));
476 if (ret == -1 || num_interfaces == 1)
481 static inline send_and_check(int s)
485 if (ret != sizeof(struct can_frame)) {
486 /* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
487 /* stats.enobufs++; */
488 /* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
490 error(1, errno, "send_frame (line %d)", __LINE__);
497 static inline void get_next_timeout(struct timespec *timeout)
500 static struct timespec last = {-1, 0 };
502 clock_gettime(CLOCK_MONOTONIC, &now);
504 if (last.tv_sec == -1)
506 if (opt.period_us != 0) {
507 last.tv_sec += opt.period_us/1000000;
508 last.tv_nsec += (opt.period_us%1000000)*1000;
509 while (last.tv_nsec >= 1000000000) {
510 last.tv_nsec -= 1000000000;
513 if (timespec_subtract(timeout, &last, &now) /* is negative */) {
515 memset(timeout, 0, sizeof(*timeout));
517 } else if (opt.timeout_ms != 0) {
518 timeout->tv_sec = opt.timeout_ms/1000;
519 timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
521 error(1, 0, "Timeout and period cannot be both zero");
524 void receive(int s, struct can_frame *frame, struct timespec *ts_kern, struct timespec *ts_user)
526 char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
529 struct cmsghdr *cmsg;
530 struct sockaddr_can addr;
532 static uint64_t dropcnt = 0;
534 iov.iov_base = frame;
535 msg.msg_name = &addr;
538 msg.msg_control = &ctrlmsg;
540 /* these settings may be modified by recvmsg() */
541 iov.iov_len = sizeof(*frame);
542 msg.msg_namelen = sizeof(addr);
543 msg.msg_controllen = sizeof(ctrlmsg);
546 nbytes = recvmsg(s, &msg, 0);
548 error(1, errno, "recvmsg");
550 if (nbytes < sizeof(struct can_frame))
551 error(1, 0, "recvmsg: incomplete CAN frame\n");
554 MEMSET_ZERO(*ts_kern);
555 for (cmsg = CMSG_FIRSTHDR(&msg);
556 cmsg && (cmsg->cmsg_level == SOL_SOCKET);
557 cmsg = CMSG_NXTHDR(&msg,cmsg)) {
558 if (cmsg->cmsg_type == SO_TIMESTAMPNS)
559 *ts_kern = *(struct timespec *)CMSG_DATA(cmsg);
560 else if (cmsg->cmsg_type == SO_RXQ_OVFL)
561 dropcnt += *(__u32 *)CMSG_DATA(cmsg);
566 void process_tx(int s)
568 error(1, 0, "%s: not implemented", __FUNCTION__);
571 void process_on_wire_rx(int s)
573 struct timespec ts_kern, ts_user, ts_diff;
574 struct can_frame frame;
576 receive(s, &frame, &ts_kern, &ts_user);
577 mi = frame2info(&frame);
578 if (msg_info_used(mi)) {
579 mi->ts_rx_onwire_kern = ts_kern;
580 mi->ts_rx_onwire = ts_user;
582 stats.invalid_frame++;
586 void process_final_rx(int s)
588 struct timespec ts_kern, ts_user, ts_diff;
589 struct can_frame frame;
593 receive(s, &frame, &ts_kern, &ts_user);
594 mi = frame2info(&frame);
595 mi->ts_rx_final_kern = ts_kern;
596 mi->ts_rx_final = ts_user;
597 mi->received = frame;
599 histogram_add(&histogram, get_msg_latency_us(mi));
601 ret = write(completion_pipe[1], &mi, sizeof(mi));
603 error(1, errno, "completion_pipe write");
606 void *measure_thread(void *arg)
609 struct pollfd pfd[3];
610 struct timespec timeout;
611 struct sockaddr_can addr;
613 int consecutive_timeouts = 0;
617 for (i=0; i<num_interfaces; i++) {
618 if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0)
619 error(1, errno, "socket");
621 addr.can_family = AF_CAN;
622 addr.can_ifindex = sock_get_if_index(s, opt.interface[i]);
624 if (i == 0) { /* TX socket */
625 /* disable default receive filter on this RAW socket */
626 /* This is obsolete as we do not read from the socket at all, but for */
627 /* this reason we can remove the receive list in the Kernel to save a */
628 /* little (really a very little!) CPU usage. */
629 if (setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0) == -1)
630 error(1, errno, "SOL_CAN_RAW");
633 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
634 error(1, errno, "bind");
636 const int timestamp_on = 1;
637 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS,
638 ×tamp_on, sizeof(timestamp_on)) < 0)
639 error(1, errno, "setsockopt SO_TIMESTAMP");
641 const int dropmonitor_on = 1;
642 if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
643 &dropmonitor_on, sizeof(dropmonitor_on)) < 0)
644 error(1, errno, "setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
648 pfd[i].events = POLLIN | POLLERR | ((opt.period_us == 0 && !opt.oneattime) ? POLLOUT : 0);
650 pfd[i].events = POLLIN;
653 set_sched_policy_and_prio(SCHED_FIFO, 40);
655 #define SEND() send_and_check(pfd[0].fd)
660 get_tstamp(&stats.tic);
662 while (!finish_flag &&
663 (opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
665 get_next_timeout(&timeout);
666 //printf("ppoll"); fflush(stdout);
667 ret = ppoll(pfd, num_interfaces, &timeout, NULL);
668 //printf("=%d\n", ret);
671 if (!INTERRUPTED_SYSCALL(errno))
672 error(1, errno, "ppoll");
676 if (opt.count == 0 || count < opt.count) {
680 /* Lost message - send a new one */
682 consecutive_timeouts++;
683 if (consecutive_timeouts < 10)
685 else /* Something is really broken */
690 if (pfd[0].revents & (POLLIN|POLLERR)) {
691 process_tx(pfd[0].fd);
693 if (pfd[0].revents & POLLOUT) {
694 if (opt.count == 0 || count < opt.count)
699 if (num_interfaces == 3 && pfd[1].revents & POLLIN) {
700 process_on_wire_rx(pfd[1].fd);
703 if (num_interfaces == 3 && pfd[1].revents & ~POLLIN)
704 error(1, 0, "Unexpected pfd[1].revents: 0x%04x\n", pfd[1].revents);
706 i = (num_interfaces == 2) ? 1 : 2;
707 if (pfd[i].revents & POLLIN) {
708 consecutive_timeouts = 0;
709 process_final_rx(pfd[i].fd);
712 if ((opt.count == 0 || count < opt.count) &&
717 if (pfd[i].revents & ~POLLIN)
718 error(1, 0, "Unexpected pfd[%d].revents: 0x%04x\n", pfd[i].revents);
722 get_tstamp(&stats.tac);
724 for (i=0; i<num_interfaces; i++)
730 struct poptOption optionsTable[] = {
731 { "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" },
732 { "count", 'c', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.count, 0, "The count of messages to send, zero corresponds to infinity", "num"},
733 { "id", 'i', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.id, 0, "CAN ID of sent messages", "id"},
734 { "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"},
735 { "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
736 { "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
737 { "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
738 { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
739 { "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
740 { "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
741 { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
743 { NULL, 0, 0, NULL, 0 }
746 int parse_options(int argc, const char *argv[])
749 poptContext optCon; /* context for parsing command-line options */
750 void *local = talloc_new (NULL);
752 optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
753 //poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
755 /* Now do options processing */
756 while ((c = poptGetNextOpt(optCon)) >= 0) {
764 error(1, 0, "%s: %s\n",
765 poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
768 if (num_interfaces < 1 || num_interfaces > 3)
769 error(1, 0, "-d option must only be given one, two or three times");
771 if (opt.oneattime && opt.period_us)
772 error(1, 0, "oneattime and period cannot be specified at the same time");
775 char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
776 opt.f_msgs = fopen(f, "w");
778 error(1, errno, "fopen: %s", f);
782 char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
783 opt.f_hist = fopen(f, "w");
785 error(1, errno, "fopen: %s", f);
789 char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
790 opt.f_stat = fopen(f, "w");
792 error(1, errno, "fopen: %s", f);
795 poptFreeContext(optCon);
800 void print_progress()
803 if (num_interfaces > 1)
804 printf("\rSent %5d, in progress %5d", count, msg_in_progress);
806 printf("\rSent %5d", count);
811 int main(int argc, const char *argv[])
817 parse_options(argc, argv);
819 mlockall(MCL_CURRENT | MCL_FUTURE);
821 signal(SIGINT, term_handler);
822 signal(SIGTERM, term_handler);
824 for (i=0; i<MAX_INFOS; i++)
825 msg_infos[i].id = -1;
827 histogram_init(&histogram, 5000000, 1);
829 ret = pipe(completion_pipe);
831 error(1, errno, "pipe");
832 ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
834 error(1, errno, "pipe fcntl");
838 pthread_create(&thread, 0, measure_thread, NULL);
840 struct timespec next, now, diff, allsent = {0,0};
841 clock_gettime(CLOCK_MONOTONIC, &next);
843 while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
844 struct pollfd pfd[1];
845 pfd[0].fd = completion_pipe[0];
846 pfd[0].events = POLLIN;
847 ret = poll(pfd, 1, 100);
848 if (ret == -1 && !INTERRUPTED_SYSCALL(errno))
849 error(1, errno, "poll main");
850 if (ret > 0 && (pfd[0].revents & POLLIN)) {
853 ret = read(completion_pipe[0], &mi, sizeof(mi));
854 if (ret < sizeof(mi))
855 error(1, errno, "read completion returned %d", ret);
856 msg_info_print(opt.f_msgs, mi);
861 clock_gettime(CLOCK_MONOTONIC, &now);
862 if (timespec_subtract(&diff, &next, &now)) {
864 next.tv_nsec += 100000000;
865 while (next.tv_nsec >= 1000000000) {
866 next.tv_nsec -= 1000000000;
870 if (opt.count != 0 && count >= opt.count) {
871 if (allsent.tv_sec == 0)
873 timespec_subtract(&diff, &now, &allsent);
874 if (diff.tv_sec >= 1)
882 stats.lost = msg_in_progress;
884 pthread_join(thread, NULL);
886 close(completion_pipe[0]);
887 close(completion_pipe[1]);
889 histogram_fprint(&histogram, opt.f_hist);
894 fprintf(opt.f_stat, "cmdline='");
895 for (i=0; i<argc; i++)
896 fprintf(opt.f_stat, "%s%s", argv[i], i < argc-1 ? " " : "");
897 fprintf(opt.f_stat, "'\n");
899 timespec_subtract(&diff, &stats.tac, &stats.tic);
900 fprintf(opt.f_stat, "duration=%s # seconds\n", tstamp_str(NULL, &diff));
902 fprintf(opt.f_stat, "sent=%d\n", count);
903 fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
904 if (stats.overrun && !opt.quiet)
905 printf("overrun=%d\n", stats.overrun);
906 fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
907 if (stats.enobufs && !opt.quiet)
908 printf("enobufs=%d\n", stats.enobufs);
909 fprintf(opt.f_stat, "lost=%d\n", stats.lost);
910 if (stats.lost && !opt.quiet)
911 printf("lost=%d\n", stats.lost);
912 fprintf(opt.f_stat, "timeouts=%d\n", stats.timeouts);
913 if (stats.timeouts && !opt.quiet)
914 printf("timeouts=%d\n", stats.timeouts);
915 fprintf(opt.f_stat, "invalid_frame=%d\n", stats.timeouts);
916 if (stats.timeouts && !opt.quiet)
917 printf("invalid_frame=%d\n", stats.timeouts);