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 */
74 struct options opt = {
85 struct timespec tic, tac;
87 unsigned invalid_frame;
90 int num_interfaces = 0;
91 int count = 0; /* Number of sent messages */
92 unsigned msg_in_progress = 0;
93 int completion_pipe[2];
98 struct timespec ts_sent, ts_sent_kern;
99 struct timespec ts_rx_onwire, ts_rx_onwire_kern;
100 struct timespec ts_rx_final, ts_rx_final_kern;
101 struct can_frame sent, received;
102 unsigned lat_measured_us, tx_time_us;
105 #define MAX_INFOS 10000
106 struct msg_info msg_infos[MAX_INFOS];
108 struct histogram histogram, histogram_gw;
110 void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
111 /* documentation see lib.h */
114 int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
116 if (cf->can_id & CAN_ERR_FLAG) {
117 sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
119 } else if (cf->can_id & CAN_EFF_FLAG) {
120 sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
123 sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
127 if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
128 sprintf(buf+offset, "R");
130 for (i = 0; i < dlc; i++) {
131 sprintf(buf+offset, "%02X", cf->data[i]);
133 if (sep && (i+1 < dlc))
134 sprintf(buf+offset++, ".");
138 static inline uint16_t frame_index(struct can_frame *frame)
141 if (frame->can_dlc >= 2) {
142 memcpy(&idx, frame->data, sizeof(idx));
143 if (idx >= MAX_INFOS)
144 error(1, 0, "%s idx too high", __FUNCTION__);
147 error(1, 0, "%s error", __FUNCTION__);
152 static inline struct msg_info *frame2info(struct can_frame *frame)
154 return &msg_infos[frame_index(frame)];
157 static inline char *tstamp_str(const void *ctx, struct timespec *tstamp)
159 return talloc_asprintf(ctx, "%ld.%06ld",
160 tstamp->tv_sec, tstamp->tv_nsec/1000);
163 /* Functions and types for CRC checks.
165 * Generated on Wed Sep 21 22:30:11 2011,
166 * by pycrc v0.7.8, http://www.tty1.net/pycrc/
167 * using the configuration:
174 * Algorithm = table-driven
175 *****************************************************************************/
176 typedef uint16_t crc_t;
178 static const crc_t crc_table[2] = {
182 crc_t crc_update(crc_t crc, uint32_t data, size_t bit_len)
184 unsigned int tbl_idx;
185 /* crc_t bc = crc; */
186 /* uint32_t bd = data; */
187 /* size_t bl = bit_len; */
190 tbl_idx = (crc >> 14) ^ (data >> 31);
191 crc = crc_table[tbl_idx & 0x01] ^ (crc << 1);
195 /* printf("crc: 0x%04x -> 0x%04x data: 0x%08x len: %d\n", */
196 /* bc, crc, bd, bl); */
200 unsigned calc_stuff_bits(struct can_frame *frame) {
202 unsigned start = 0, end;
203 uint32_t mask, ones = 0, basemask = 0xf8000000;
204 unsigned stuffed = 0;
205 memset(bitmap, 0, sizeof(bitmap));
209 /* char received[64]; */
210 /* sprint_canframe(received, frame, true); */
211 /* printf("Frame: %s\n", received); */
213 if (frame->can_id & CAN_EFF_FLAG) {
215 ((frame->can_id & CAN_EFF_MASK) >> 25);
217 ((frame->can_id & CAN_EFF_MASK) >> 18) << 25 |
219 ((frame->can_id & CAN_EFF_MASK) & 0x3ffff) << 7 |
220 (!!(frame->can_id & CAN_RTR_FLAG)) << 6 |
222 frame->can_dlc & 0xf;
223 bitmap[2] = htonl(((uint32_t*)frame->data)[0]);
224 bitmap[3] = htonl(((uint32_t*)frame->data)[1]);
226 end = 64 + 8*frame->can_dlc;
227 crc = crc_update(crc, bitmap[0] << start, 32-start);
228 crc = crc_update(crc, bitmap[1], 32);
229 crc = crc_update(crc, bitmap[2], end - 64 > 32 ? 32 : end - 64);
230 crc = crc_update(crc, bitmap[3], end > 96 ? end - 96 : 0);
231 crcx = (uint32_t)htons(crc) << 17;
232 if (frame->can_dlc < 4)
233 bitmap[2] |= crcx >> (frame->can_dlc*8);
234 if (frame->can_dlc = 3)
235 bitmap[3] |= crcx << 8;
236 if (frame->can_dlc >= 4)
237 bitmap[3] |= crcx >> (frame->can_dlc*8);
240 (frame->can_id << 7) |
241 (!!(frame->can_id & CAN_RTR_FLAG)) << 6 |
243 frame->can_dlc & 0xf;
244 bitmap[1] = htonl(((uint32_t*)frame->data)[0]);
245 bitmap[2] = htonl(((uint32_t*)frame->data)[1]);
247 end = 32 + 8*frame->can_dlc;
249 /* TODO: Calc stuff bits in CRC */
250 while (start < end) {
251 mask = basemask >> (start & 0x1f);
253 ones = ones ? mask : 0;
254 uint32_t chunk = (bitmap[start >> 5] & mask) ^ ones;
255 //printf("start=%d bitmap=0x%08x mask=0x%08x ones=0x%08x chunk=0x%08x\n", start, bitmap[start >> 5], mask, ones, chunk);
257 unsigned change = __builtin_clz(chunk);
258 start = start & ~0x1f | change;
259 basemask = 0xf8000000;
261 unsigned oldstart = start;
262 start += __builtin_popcount(mask);
263 mask = (oldstart & 0x1f) ? basemask << (-oldstart & 0x1f) : 0;
264 //printf("oldstart=%d shl=%d mask=0x%08x\n", oldstart, -oldstart & 0x1f, mask);
265 if (mask && start < end)
267 if (start <= end && !mask) {
269 basemask = 0xf0000000;
270 //printf("stuffed %d\n", !ones);
277 //printf ("STUFFED %d BITS\n", stuffed);
281 unsigned calc_frame_txtime_us(struct can_frame *frame) {
282 return calc_stuff_bits(frame) +
285 ((frame->can_id & CAN_EFF_FLAG) ?
297 3 + /* CRC del, ACK, ACK del */
301 void msg_info_print(FILE *f, struct msg_info *mi)
303 struct timespec diff;
304 void *local = talloc_new (NULL);
306 char sent[64], received[64];
308 sprint_canframe(sent, &mi->sent, true);
309 sprint_canframe(received, &mi->received, true);
311 #define S(ts) tstamp_str(local, &ts)
312 #define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
314 switch (num_interfaces) {
316 fprintf(f, "%ld: %s %s -> %s (%s) %s = %s (%s) %d\n",
317 num, S(mi->ts_sent), sent, S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
318 DIFF(mi->ts_sent, mi->ts_rx_final_kern),
319 DIFF(mi->ts_sent, mi->ts_rx_final),
323 fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s) %d\n",
324 num, S(mi->ts_sent), sent,
325 S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
326 S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
327 DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
328 DIFF(mi->ts_sent, mi->ts_rx_onwire),
329 DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
330 DIFF(mi->ts_rx_onwire, mi->ts_rx_final),
340 /* Subtract the `struct timespec' values X and Y, storing the result in
341 RESULT. Return 1 if the difference is negative, otherwise 0. */
343 int timespec_subtract (struct timespec *result, struct timespec *x, struct timespec *yy)
345 struct timespec ylocal = *yy, *y = &ylocal;
346 /* Perform the carry for the later subtraction by updating Y. */
347 if (x->tv_nsec < y->tv_nsec) {
348 int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
349 y->tv_nsec -= 1000000000 * nsec;
352 if (x->tv_nsec - y->tv_nsec > 1000000000) {
353 int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
354 y->tv_nsec += 1000000000 * nsec;
358 /* Compute the time remaining to wait.
359 `tv_nsec' is certainly positive. */
360 result->tv_sec = x->tv_sec - y->tv_sec;
361 result->tv_nsec = x->tv_nsec - y->tv_nsec;
363 /* Return 1 if result is negative. */
364 return x->tv_sec < y->tv_sec;
367 void dbg_print_timespec(char *msg, struct timespec *tv)
370 printf("%s sec=%ld nsec=%ld\n", msg, tv->tv_sec, tv->tv_nsec);
373 static inline void calc_msg_latencies(struct msg_info *mi)
375 struct timespec diff;
376 switch (num_interfaces) {
379 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
381 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
385 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
387 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
392 mi->lat_measured_us = diff.tv_sec * 1000000 + diff.tv_nsec/1000;
393 mi->tx_time_us = calc_frame_txtime_us(&mi->received);
396 void set_sched_policy_and_prio(int policy, int rtprio)
398 struct sched_param scheduling_parameters;
399 int maxprio=sched_get_priority_max(policy);
400 int minprio=sched_get_priority_min(policy);
402 if((rtprio < minprio) || (rtprio > maxprio))
403 error(1, 0, "The priority for requested policy is out of <%d, %d> range\n",
406 scheduling_parameters.sched_priority = rtprio;
408 if (0 != pthread_setschedparam(pthread_self(), policy, &scheduling_parameters))
409 error(1, errno, "pthread_setschedparam error");
412 void term_handler(int signum)
417 static inline int sock_get_if_index(int s, const char *if_name)
422 strcpy(ifr.ifr_name, if_name);
423 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
424 error(1, errno, "SIOCGIFINDEX '%s'", if_name);
425 return ifr.ifr_ifindex;
428 static inline get_tstamp(struct timespec *ts)
430 clock_gettime(CLOCK_REALTIME, ts);
444 debugfs = "/sys/kernel/debug";
446 strcpy(path, debugfs);
447 strcat(path,"/tracing/tracing_on");
448 trace_fd = open(path, O_WRONLY);
450 write(trace_fd, "1", 1);
452 strcpy(path, debugfs);
453 strcat(path,"/tracing/trace_marker");
454 marker_fd = open(path, O_WRONLY);
456 strcpy(path, debugfs);
457 strcat(path,"/tracing/set_ftrace_pid");
458 f = fopen(path, "w");
459 fprintf(f, "%d\n", getpid());
461 system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
462 system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
463 system("echo > /sys/kernel/debug/tracing/trace");
464 system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
469 static inline void trace_on()
472 write(trace_fd, "1", 1);
475 static inline void trace_off(int ret)
477 if (marker_fd >= 0) {
479 sprintf(marker, "write returned %d\n", ret);
480 write(marker_fd, marker, strlen(marker));
483 write(trace_fd, "0", 1);
486 static inline void msg_info_free(struct msg_info *mi)
491 static inline bool msg_info_used(struct msg_info *mi)
496 int send_frame(int socket)
498 struct can_frame frame;
501 static int curr_msg = -1;
507 while (msg_info_used(&msg_infos[i]) && i != curr_msg) {
513 error(1, 0, "Msg info table is full! Probably, many packets were lost.");
517 frame.can_id = opt.id;
519 error(1, 0, "Length < 2 is not yet supported");
520 frame.can_dlc = opt.length;
522 memcpy(frame.data, &idx, sizeof(idx));
523 mi = frame2info(&frame);
525 mi->id = frame.can_id;
526 mi->length = frame.can_dlc;
527 get_tstamp(&mi->ts_sent);
531 ret = write(socket, &frame, sizeof(frame));
534 if (ret == -1 || num_interfaces == 1)
539 static inline send_and_check(int s)
543 if (ret != sizeof(struct can_frame)) {
544 /* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
545 /* stats.enobufs++; */
546 /* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
548 error(1, errno, "send_frame (line %d)", __LINE__);
555 static inline void get_next_timeout(struct timespec *timeout)
558 static struct timespec last = {-1, 0 };
560 clock_gettime(CLOCK_MONOTONIC, &now);
562 if (last.tv_sec == -1)
564 if (opt.period_us != 0) {
565 last.tv_sec += opt.period_us/1000000;
566 last.tv_nsec += (opt.period_us%1000000)*1000;
567 while (last.tv_nsec >= 1000000000) {
568 last.tv_nsec -= 1000000000;
571 if (timespec_subtract(timeout, &last, &now) /* is negative */) {
573 memset(timeout, 0, sizeof(*timeout));
575 } else if (opt.timeout_ms != 0) {
576 timeout->tv_sec = opt.timeout_ms/1000;
577 timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
579 error(1, 0, "Timeout and period cannot be both zero");
582 void receive(int s, struct can_frame *frame, struct timespec *ts_kern, struct timespec *ts_user)
584 char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
587 struct cmsghdr *cmsg;
588 struct sockaddr_can addr;
590 static uint64_t dropcnt = 0;
592 iov.iov_base = frame;
593 msg.msg_name = &addr;
596 msg.msg_control = &ctrlmsg;
598 /* these settings may be modified by recvmsg() */
599 iov.iov_len = sizeof(*frame);
600 msg.msg_namelen = sizeof(addr);
601 msg.msg_controllen = sizeof(ctrlmsg);
604 nbytes = recvmsg(s, &msg, 0);
606 error(1, errno, "recvmsg");
608 if (nbytes < sizeof(struct can_frame))
609 error(1, 0, "recvmsg: incomplete CAN frame\n");
612 MEMSET_ZERO(*ts_kern);
613 for (cmsg = CMSG_FIRSTHDR(&msg);
614 cmsg && (cmsg->cmsg_level == SOL_SOCKET);
615 cmsg = CMSG_NXTHDR(&msg,cmsg)) {
616 if (cmsg->cmsg_type == SO_TIMESTAMPNS)
617 *ts_kern = *(struct timespec *)CMSG_DATA(cmsg);
618 else if (cmsg->cmsg_type == SO_RXQ_OVFL)
619 dropcnt += *(__u32 *)CMSG_DATA(cmsg);
624 void process_tx(int s)
626 error(1, 0, "%s: not implemented", __FUNCTION__);
629 void process_on_wire_rx(int s)
631 struct timespec ts_kern, ts_user, ts_diff;
632 struct can_frame frame;
634 receive(s, &frame, &ts_kern, &ts_user);
635 mi = frame2info(&frame);
636 if (msg_info_used(mi)) {
637 mi->ts_rx_onwire_kern = ts_kern;
638 mi->ts_rx_onwire = ts_user;
640 stats.invalid_frame++;
644 void process_final_rx(int s)
646 struct timespec ts_kern, ts_user, ts_diff;
647 struct can_frame frame;
651 receive(s, &frame, &ts_kern, &ts_user);
652 mi = frame2info(&frame);
653 mi->ts_rx_final_kern = ts_kern;
654 mi->ts_rx_final = ts_user;
655 mi->received = frame;
657 calc_msg_latencies(mi);
659 histogram_add(&histogram, mi->lat_measured_us);
660 histogram_add(&histogram_gw, mi->lat_measured_us - mi->tx_time_us);
662 ret = write(completion_pipe[1], &mi, sizeof(mi));
664 error(1, errno, "completion_pipe write");
667 void *measure_thread(void *arg)
670 struct pollfd pfd[3];
671 struct timespec timeout;
672 struct sockaddr_can addr;
674 int consecutive_timeouts = 0;
678 for (i=0; i<num_interfaces; i++) {
679 if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0)
680 error(1, errno, "socket");
682 addr.can_family = AF_CAN;
683 addr.can_ifindex = sock_get_if_index(s, opt.interface[i]);
685 if (i == 0) { /* TX socket */
686 /* disable default receive filter on this RAW socket */
687 /* This is obsolete as we do not read from the socket at all, but for */
688 /* this reason we can remove the receive list in the Kernel to save a */
689 /* little (really a very little!) CPU usage. */
690 if (setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0) == -1)
691 error(1, errno, "SOL_CAN_RAW");
694 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
695 error(1, errno, "bind");
697 const int timestamp_on = 1;
698 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS,
699 ×tamp_on, sizeof(timestamp_on)) < 0)
700 error(1, errno, "setsockopt SO_TIMESTAMP");
702 const int dropmonitor_on = 1;
703 if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
704 &dropmonitor_on, sizeof(dropmonitor_on)) < 0)
705 error(1, errno, "setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
709 pfd[i].events = POLLIN | POLLERR | ((opt.period_us == 0 && !opt.oneattime) ? POLLOUT : 0);
711 pfd[i].events = POLLIN;
714 set_sched_policy_and_prio(SCHED_FIFO, 40);
716 #define SEND() send_and_check(pfd[0].fd)
721 get_tstamp(&stats.tic);
723 while (!finish_flag &&
724 (opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
726 get_next_timeout(&timeout);
727 //printf("ppoll"); fflush(stdout);
728 ret = ppoll(pfd, num_interfaces, &timeout, NULL);
729 //printf("=%d\n", ret);
732 if (!INTERRUPTED_SYSCALL(errno))
733 error(1, errno, "ppoll");
737 if (opt.count == 0 || count < opt.count) {
741 /* Lost message - send a new one */
743 consecutive_timeouts++;
744 if (consecutive_timeouts < 10)
746 else /* Something is really broken */
751 if (pfd[0].revents & (POLLIN|POLLERR)) {
752 process_tx(pfd[0].fd);
754 if (pfd[0].revents & POLLOUT) {
755 if (opt.count == 0 || count < opt.count)
760 if (num_interfaces == 3 && pfd[1].revents & POLLIN) {
761 process_on_wire_rx(pfd[1].fd);
764 if (num_interfaces == 3 && pfd[1].revents & ~POLLIN)
765 error(1, 0, "Unexpected pfd[1].revents: 0x%04x\n", pfd[1].revents);
767 i = (num_interfaces == 2) ? 1 : 2;
768 if (pfd[i].revents & POLLIN) {
769 consecutive_timeouts = 0;
770 process_final_rx(pfd[i].fd);
773 if ((opt.count == 0 || count < opt.count) &&
778 if (pfd[i].revents & ~POLLIN)
779 error(1, 0, "Unexpected pfd[%d].revents: 0x%04x\n", pfd[i].revents);
783 get_tstamp(&stats.tac);
785 for (i=0; i<num_interfaces; i++)
791 struct poptOption optionsTable[] = {
792 { "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" },
793 { "count", 'c', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.count, 0, "The count of messages to send, zero corresponds to infinity", "num"},
794 { "id", 'i', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.id, 0, "CAN ID of sent messages", "id"},
795 { "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"},
796 { "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
797 { "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
798 { "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
799 { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
800 { "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
801 { "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
802 { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
804 { NULL, 0, 0, NULL, 0 }
807 int parse_options(int argc, const char *argv[])
810 poptContext optCon; /* context for parsing command-line options */
811 void *local = talloc_new (NULL);
813 optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
814 //poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
816 /* Now do options processing */
817 while ((c = poptGetNextOpt(optCon)) >= 0) {
825 error(1, 0, "%s: %s\n",
826 poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
829 if (num_interfaces < 1 || num_interfaces > 3)
830 error(1, 0, "-d option must only be given one, two or three times");
832 if (opt.oneattime && opt.period_us)
833 error(1, 0, "oneattime and period cannot be specified at the same time");
836 char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
837 opt.f_msgs = fopen(f, "w");
839 error(1, errno, "fopen: %s", f);
843 char *f = talloc_asprintf(local, "%s-hist-raw.txt", opt.name);
844 opt.f_hist = fopen(f, "w");
846 error(1, errno, "fopen: %s", f);
850 char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
851 opt.f_hist_gw = fopen(f, "w");
853 error(1, errno, "fopen: %s", f);
857 char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
858 opt.f_stat = fopen(f, "w");
860 error(1, errno, "fopen: %s", f);
863 poptFreeContext(optCon);
868 void print_progress()
871 if (num_interfaces > 1)
872 printf("\rSent %5d, in progress %5d", count, msg_in_progress);
874 printf("\rSent %5d", count);
879 int main(int argc, const char *argv[])
885 parse_options(argc, argv);
887 mlockall(MCL_CURRENT | MCL_FUTURE);
889 signal(SIGINT, term_handler);
890 signal(SIGTERM, term_handler);
892 for (i=0; i<MAX_INFOS; i++)
893 msg_infos[i].id = -1;
895 histogram_init(&histogram, 5000000, 1);
896 histogram_init(&histogram_gw, 5000000, 1);
898 ret = pipe(completion_pipe);
900 error(1, errno, "pipe");
901 ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
903 error(1, errno, "pipe fcntl");
906 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
908 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -CONT -%s'",
909 getenv("LATESTER_CONTROL_HACKBENCH"));
910 printf("Running: %s\n", cmd);
914 pthread_create(&thread, 0, measure_thread, NULL);
916 struct timespec next, now, diff, allsent = {0,0};
917 clock_gettime(CLOCK_MONOTONIC, &next);
919 while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
920 struct pollfd pfd[1];
921 pfd[0].fd = completion_pipe[0];
922 pfd[0].events = POLLIN;
923 ret = poll(pfd, 1, 100);
924 if (ret == -1 && !INTERRUPTED_SYSCALL(errno))
925 error(1, errno, "poll main");
926 if (ret > 0 && (pfd[0].revents & POLLIN)) {
929 ret = read(completion_pipe[0], &mi, sizeof(mi));
930 if (ret < sizeof(mi))
931 error(1, errno, "read completion returned %d", ret);
932 msg_info_print(opt.f_msgs, mi);
937 clock_gettime(CLOCK_MONOTONIC, &now);
938 if (timespec_subtract(&diff, &next, &now)) {
940 next.tv_nsec += 100000000;
941 while (next.tv_nsec >= 1000000000) {
942 next.tv_nsec -= 1000000000;
946 if (opt.count != 0 && count >= opt.count) {
947 if (allsent.tv_sec == 0)
949 timespec_subtract(&diff, &now, &allsent);
950 if (diff.tv_sec >= 1)
958 stats.lost = msg_in_progress;
960 pthread_join(thread, NULL);
962 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
964 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -STOP -%s'",
965 getenv("LATESTER_CONTROL_HACKBENCH"));
966 printf("Running: %s\n", cmd);
970 close(completion_pipe[0]);
971 close(completion_pipe[1]);
973 histogram_fprint(&histogram, opt.f_hist);
974 histogram_fprint(&histogram_gw, opt.f_hist_gw);
976 fclose(opt.f_hist_gw);
980 fprintf(opt.f_stat, "cmdline='");
981 for (i=0; i<argc; i++)
982 fprintf(opt.f_stat, "%s%s", argv[i], i < argc-1 ? " " : "");
983 fprintf(opt.f_stat, "'\n");
985 timespec_subtract(&diff, &stats.tac, &stats.tic);
986 fprintf(opt.f_stat, "duration=%s # seconds\n", tstamp_str(NULL, &diff));
988 fprintf(opt.f_stat, "sent=%d\n", count);
989 fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
990 if (stats.overrun && !opt.quiet)
991 printf("overrun=%d\n", stats.overrun);
992 fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
993 if (stats.enobufs && !opt.quiet)
994 printf("enobufs=%d\n", stats.enobufs);
995 fprintf(opt.f_stat, "lost=%d\n", stats.lost);
996 if (stats.lost && !opt.quiet)
997 printf("lost=%d\n", stats.lost);
998 fprintf(opt.f_stat, "timeouts=%d\n", stats.timeouts);
999 if (stats.timeouts && !opt.quiet)
1000 printf("timeouts=%d\n", stats.timeouts);
1001 fprintf(opt.f_stat, "invalid_frame=%d\n", stats.timeouts);
1002 if (stats.timeouts && !opt.quiet)
1003 printf("invalid_frame=%d\n", stats.timeouts);