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>
37 #include <linux/net_tstamp.h>
39 #include "histogram.h"
44 #define dbg(level, fmt, arg...) do {} while (0)
46 #define dbg(level, fmt, arg...) do { if (level <= DEBUG) { printf("candping: " fmt, ## arg); } } while (0)
49 #define INTERRUPTED_SYSCALL(errno) (errno == EINTR || errno == ERESTART)
51 #define MEMSET_ZERO(obj) memset(&(obj), 0, sizeof(obj))
53 /* Global variables */
54 volatile sig_atomic_t finish_flag = 0; /* Threads should terminate. */
55 sem_t finish_sem; /* Thread signals a termination */
57 /* Command line options */
70 /* Temporary variables */
77 struct options opt = {
88 struct timespec tic, tac;
90 unsigned invalid_frame;
93 int num_interfaces = 0;
94 int count = 0; /* Number of sent messages */
95 unsigned msg_in_progress = 0;
96 int completion_pipe[2];
97 struct timespec can_tsdiff = {0, 0}; /* can_rx2_ts - can_rx1_ts */
102 struct timespec ts_sent, ts_sent_kern;
103 struct timespec ts_rx_onwire, ts_rx_onwire_kern;
104 struct timespec ts_rx_final, ts_rx_final_kern;
105 struct can_frame sent, received;
108 #define MAX_INFOS 10000
109 struct msg_info msg_infos[MAX_INFOS];
111 struct histogram histogram, histogram_gw;
113 void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
114 /* documentation see lib.h */
117 int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
119 if (cf->can_id & CAN_ERR_FLAG) {
120 sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
122 } else if (cf->can_id & CAN_EFF_FLAG) {
123 sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
126 sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
130 if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
131 sprintf(buf+offset, "R");
133 for (i = 0; i < dlc; i++) {
134 sprintf(buf+offset, "%02X", cf->data[i]);
136 if (sep && (i+1 < dlc))
137 sprintf(buf+offset++, ".");
141 static inline uint16_t frame_index(struct can_frame *frame)
144 if (frame->can_dlc >= 2) {
145 memcpy(&idx, frame->data, sizeof(idx));
146 if (idx >= MAX_INFOS)
147 error(1, 0, "%s idx too high", __FUNCTION__);
150 error(1, 0, "%s error", __FUNCTION__);
155 static inline struct msg_info *frame2info(struct can_frame *frame)
157 return &msg_infos[frame_index(frame)];
160 static inline char *tstamp_str(const void *ctx, struct timespec *tstamp)
162 return talloc_asprintf(ctx, "%ld.%06ld",
163 tstamp->tv_sec, tstamp->tv_nsec/1000);
166 int timespec_subtract (struct timespec *result, const struct timespec *x, const struct timespec *yy);
168 static inline unsigned get_timestamp_diff_us(struct msg_info *mi);
170 void msg_info_process(FILE *f, struct msg_info *mi)
172 struct timespec diff;
173 void *local = talloc_new (NULL);
175 char sent[64], received[64];
176 int diff_us = get_timestamp_diff_us(mi);
177 int tx_time_us = calc_frame_length(&mi->received);
179 /* Update histograms */
180 histogram_add(&histogram, diff_us);
181 histogram_add(&histogram_gw, diff_us - tx_time_us);
186 /* Print information to a file */
187 sprint_canframe(sent, &mi->sent, true);
188 sprint_canframe(received, &mi->received, true);
190 #define S(ts) tstamp_str(local, &ts)
191 #define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
193 switch (num_interfaces) {
195 fprintf(f, "%ld: %s %s -> %s (%s) %s = %s (%s) %d\n",
196 num, S(mi->ts_sent), sent, S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
197 DIFF(mi->ts_sent, mi->ts_rx_final_kern),
198 DIFF(mi->ts_sent, mi->ts_rx_final),
202 fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s) %d %.6f\n",
203 num, S(mi->ts_sent), sent,
204 S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
205 S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
206 DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
207 DIFF(mi->ts_sent, mi->ts_rx_onwire),
208 DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
209 DIFF(mi->ts_rx_onwire, mi->ts_rx_final),
211 1e-6*(diff_us - tx_time_us));
220 /* Subtract the `struct timespec' values X and Y, storing the result in
221 RESULT. Return 1 if the difference is negative, otherwise 0. */
223 int timespec_subtract (struct timespec *result, const struct timespec *x, const struct timespec *yy)
225 struct timespec ylocal = *yy, *y = &ylocal;
226 /* Perform the carry for the later subtraction by updating Y. */
227 if (x->tv_nsec < y->tv_nsec) {
228 int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
229 y->tv_nsec -= 1000000000 * nsec;
232 if (x->tv_nsec - y->tv_nsec > 1000000000) {
233 int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
234 y->tv_nsec += 1000000000 * nsec;
238 /* Compute the time remaining to wait.
239 `tv_nsec' is certainly positive. */
240 result->tv_sec = x->tv_sec - y->tv_sec;
241 result->tv_nsec = x->tv_nsec - y->tv_nsec;
243 /* Return 1 if result is negative. */
244 return x->tv_sec < y->tv_sec;
247 void dbg_print_timespec(char *msg, struct timespec *tv)
250 printf("%s sec=%ld nsec=%ld\n", msg, tv->tv_sec, tv->tv_nsec);
253 static inline unsigned get_timestamp_diff_us(struct msg_info *mi)
255 struct timespec diff;
256 switch (num_interfaces) {
259 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
261 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
265 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
267 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
272 unsigned us = diff.tv_sec * 1000000 + diff.tv_nsec/1000;
276 void set_sched_policy_and_prio(int policy, int rtprio)
278 struct sched_param scheduling_parameters;
279 int maxprio=sched_get_priority_max(policy);
280 int minprio=sched_get_priority_min(policy);
282 if((rtprio < minprio) || (rtprio > maxprio))
283 error(1, 0, "The priority for requested policy is out of <%d, %d> range\n",
286 scheduling_parameters.sched_priority = rtprio;
288 if (0 != pthread_setschedparam(pthread_self(), policy, &scheduling_parameters))
289 error(1, errno, "pthread_setschedparam error");
292 void term_handler(int signum)
297 static inline int sock_get_if_index(int s, const char *if_name)
302 strcpy(ifr.ifr_name, if_name);
303 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
304 error(1, errno, "SIOCGIFINDEX '%s'", if_name);
305 return ifr.ifr_ifindex;
308 static inline void get_tstamp(struct timespec *ts)
310 clock_gettime(CLOCK_MONOTONIC/*REALTIME*/, ts);
324 debugfs = "/sys/kernel/debug";
326 strcpy(path, debugfs);
327 strcat(path,"/tracing/tracing_on");
328 trace_fd = open(path, O_WRONLY);
330 write(trace_fd, "1", 1);
332 strcpy(path, debugfs);
333 strcat(path,"/tracing/trace_marker");
334 marker_fd = open(path, O_WRONLY);
336 strcpy(path, debugfs);
337 strcat(path,"/tracing/set_ftrace_pid");
338 f = fopen(path, "w");
339 fprintf(f, "%d\n", getpid());
341 system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
342 system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
343 system("echo > /sys/kernel/debug/tracing/trace");
344 system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
349 static inline void trace_on()
352 write(trace_fd, "1", 1);
355 static inline void trace_off(int ret)
357 if (marker_fd >= 0) {
359 sprintf(marker, "write returned %d\n", ret);
360 write(marker_fd, marker, strlen(marker));
363 write(trace_fd, "0", 1);
366 static inline void msg_info_free(struct msg_info *mi)
371 static inline bool msg_info_used(struct msg_info *mi)
376 int send_frame(int socket)
378 struct can_frame frame;
381 static int curr_msg = -1;
387 while (msg_info_used(&msg_infos[i]) && i != curr_msg) {
393 error(1, 0, "Msg info table is full! Probably, many packets were lost.");
397 frame.can_id = opt.id;
399 error(1, 0, "Length < 2 is not yet supported");
400 frame.can_dlc = opt.length;
402 memcpy(frame.data, &idx, sizeof(idx));
403 mi = frame2info(&frame);
405 mi->id = frame.can_id;
406 mi->length = frame.can_dlc;
407 get_tstamp(&mi->ts_sent);
411 ret = write(socket, &frame, sizeof(frame));
414 if (ret == -1 || num_interfaces == 1)
419 static inline void send_and_check(int s)
423 if (ret != sizeof(struct can_frame)) {
424 /* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
425 /* stats.enobufs++; */
426 /* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
428 error(1, errno, "send_frame (line %d)", __LINE__);
435 static inline void get_next_timeout(struct timespec *timeout, bool advance)
438 static struct timespec last = {-1, 0 };
440 clock_gettime(CLOCK_MONOTONIC, &now);
442 if (last.tv_sec == -1) {
444 last.tv_nsec = last.tv_nsec/1000000*1000000;
446 if (opt.period_us != 0) {
448 last.tv_sec += opt.period_us/1000000;
449 last.tv_nsec += (opt.period_us%1000000)*1000;
450 while (last.tv_nsec >= 1000000000) {
451 last.tv_nsec -= 1000000000;
455 if (timespec_subtract(timeout, &last, &now) /* is negative */) {
457 memset(timeout, 0, sizeof(*timeout));
459 /* printf("next %ld.%06ld now %ld.%06ld --> timeout %ld.%06ld\n", */
460 /* last.tv_sec, last.tv_nsec/1000, */
461 /* now.tv_sec, now.tv_nsec/1000, */
462 /* timeout->tv_sec, timeout->tv_nsec/1000); */
463 } else if (opt.timeout_ms != 0) {
464 timeout->tv_sec = opt.timeout_ms/1000;
465 timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
467 error(1, 0, "Timeout and period cannot be both zero");
470 void receive(int s, struct can_frame *frame, struct timespec *ts_kern, struct timespec *ts_user)
472 char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
475 struct cmsghdr *cmsg;
476 struct sockaddr_can addr;
478 static uint64_t dropcnt = 0;
479 bool have_hwtstamp = 0;
481 iov.iov_base = frame;
482 msg.msg_name = &addr;
485 msg.msg_control = &ctrlmsg;
487 /* these settings may be modified by recvmsg() */
488 iov.iov_len = sizeof(*frame);
489 msg.msg_namelen = sizeof(addr);
490 msg.msg_controllen = sizeof(ctrlmsg);
493 nbytes = recvmsg(s, &msg, 0);
495 error(1, errno, "recvmsg");
497 if (nbytes < sizeof(struct can_frame))
498 error(1, 0, "recvmsg: incomplete CAN frame\n");
501 MEMSET_ZERO(*ts_kern);
502 for (cmsg = CMSG_FIRSTHDR(&msg);
503 cmsg && (cmsg->cmsg_level == SOL_SOCKET);
504 cmsg = CMSG_NXTHDR(&msg,cmsg)) {
505 if (cmsg->cmsg_type == SO_TIMESTAMPNS) {
507 memcpy(ts_kern, CMSG_DATA(cmsg), sizeof(struct timespec));
509 else if (cmsg->cmsg_type == SO_TIMESTAMPING) {
510 struct timespec *ts = (struct timespec *) CMSG_DATA(cmsg);
511 memcpy(ts_kern, &ts[2], sizeof(struct timespec));
514 else if (cmsg->cmsg_type == SO_RXQ_OVFL) {
516 memcpy(&ovfl, CMSG_DATA(cmsg), sizeof(ovfl));
523 void process_tx(int s)
525 error(1, 0, "%s: not implemented", __FUNCTION__);
528 void process_on_wire_rx(int s)
530 struct timespec ts_kern, ts_user;
531 struct can_frame frame;
533 receive(s, &frame, &ts_kern, &ts_user);
534 mi = frame2info(&frame);
535 if (msg_info_used(mi)) {
536 mi->ts_rx_onwire_kern = ts_kern;
537 mi->ts_rx_onwire = ts_user;
539 stats.invalid_frame++;
543 void process_final_rx(int s)
545 struct timespec ts_kern, ts_user;
546 struct can_frame frame;
550 receive(s, &frame, &ts_kern, &ts_user);
551 mi = frame2info(&frame);
552 mi->ts_rx_final_kern = ts_kern;
553 mi->ts_rx_final = ts_user;
554 mi->received = frame;
556 ret = write(completion_pipe[1], &mi, sizeof(mi));
558 error(1, errno, "completion_pipe write");
561 void determine_can_timing_offset(struct pollfd *pfd, int nifc)
564 volatile uint32_t *can_crossbar;
566 struct can_frame frame;
567 struct timespec ts_rx1, ts_rx2, ts_dummy;
573 uiofd = open("/dev/uio0", O_RDWR);
576 perror("determine_can_timing_offset: /dev/uio0");
580 can_crossbar = (volatile uint32_t *) mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, uiofd, 0);
581 if(can_crossbar == MAP_FAILED)
587 // Bit: 20 19 18 17 16 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
588 // STBY E3 E2 E1 E0 I3 I2 I1 I0 C3 C2 C1 C0
589 // C*: can* (outer can physical interface) connection line assignment (0-3)
590 // I*: ifc* (inner can network interface) connection line assignment (0-3)
591 // E*: can* output enable: 1 = connect to physical interface, 0 = disconnect from physical interface, conenect RX and TX together
592 // STBY: CAN Transceivers standby mode
593 oldreg = can_crossbar[0];
594 can_crossbar[0] = 0x00000000; // connect all interfaces together, disable output, disable standby
598 memcpy(frame.data, "SYNC", 4);
599 res = write(pfd[0].fd, &frame, sizeof(frame));
600 if(res != sizeof(frame))
606 receive(pfd[1].fd, &frame, &ts_rx1, &ts_dummy);
607 receive(pfd[2].fd, &frame, &ts_rx2, &ts_dummy);
608 timespec_subtract(&can_tsdiff, &ts_rx2, &ts_rx1);
611 can_crossbar[0] = oldreg;
612 munmap((void*)can_crossbar, 4096);
617 void *measure_thread(void *arg)
620 struct pollfd pfd[3];
621 struct timespec timeout;
622 struct sockaddr_can addr;
623 int consecutive_timeouts = 0;
627 for (i=0; i<num_interfaces; i++) {
628 if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0)
629 error(1, errno, "socket");
631 addr.can_family = AF_CAN;
632 addr.can_ifindex = sock_get_if_index(s, opt.interface[i]);
634 if (i == 0) { /* TX socket */
635 /* disable default receive filter on this RAW socket */
636 /* This is obsolete as we do not read from the socket at all, but for */
637 /* this reason we can remove the receive list in the Kernel to save a */
638 /* little (really a very little!) CPU usage. */
639 if (setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0) == -1)
640 error(1, errno, "SOL_CAN_RAW");
643 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
644 error(1, errno, "bind");
646 // TODO: set HW TSTAMP flags?
647 const int so_timestamping_flags = SOF_TIMESTAMPING_RAW_HARDWARE;
648 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPING,
649 &so_timestamping_flags,
650 sizeof(so_timestamping_flags)) < 0)
652 perror("setsockopt SO_TIMESTAMPING");
653 fprintf(stderr, "Falling back to SW timestamps.\n");
655 const int timestamp_on = 1;
656 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS,
657 ×tamp_on, sizeof(timestamp_on)) < 0)
658 error(1, errno, "setsockopt SO_TIMESTAMPNS");
661 const int dropmonitor_on = 1;
662 if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
663 &dropmonitor_on, sizeof(dropmonitor_on)) < 0)
664 error(1, errno, "setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
668 pfd[i].events = POLLIN | POLLERR | ((opt.period_us == 0 && !opt.oneattime) ? POLLOUT : 0);
670 pfd[i].events = POLLIN;
673 determine_can_timing_offset(pfd, num_interfaces);
676 set_sched_policy_and_prio(SCHED_FIFO, 40);
678 #define SEND() send_and_check(pfd[0].fd)
683 get_tstamp(&stats.tic);
685 while (!finish_flag &&
686 (opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
688 get_next_timeout(&timeout, ret == 0);
689 //printf("timeout %ld.%06ld\n", timeout.tv_sec, timeout.tv_nsec/1000);
690 //printf("ppoll"); fflush(stdout);
691 ret = ppoll(pfd, num_interfaces, &timeout, NULL);
692 //printf("=%d\n", ret);
695 if (!INTERRUPTED_SYSCALL(errno))
696 error(1, errno, "ppoll");
700 if (opt.count == 0 || count < opt.count) {
704 /* Lost message - send a new one */
706 consecutive_timeouts++;
707 if (consecutive_timeouts < 10)
709 else /* Something is really broken */
714 if (pfd[0].revents & (POLLIN|POLLERR)) {
715 process_tx(pfd[0].fd);
717 if (pfd[0].revents & POLLOUT) {
718 if (opt.count == 0 || count < opt.count)
723 if (num_interfaces == 3 && pfd[1].revents & POLLIN) {
724 process_on_wire_rx(pfd[1].fd);
727 if (num_interfaces == 3 && pfd[1].revents & ~POLLIN)
728 error(1, 0, "Unexpected pfd[1].revents: 0x%04x\n", pfd[1].revents);
730 i = (num_interfaces == 2) ? 1 : 2;
731 if (pfd[i].revents & POLLIN) {
732 consecutive_timeouts = 0;
733 process_final_rx(pfd[i].fd);
736 if ((opt.count == 0 || count < opt.count) &&
741 if (pfd[i].revents & ~POLLIN)
742 error(1, 0, "Unexpected pfd[%d].revents: 0x%04x\n", i, pfd[i].revents);
746 get_tstamp(&stats.tac);
748 for (i=0; i<num_interfaces; i++)
754 struct poptOption optionsTable[] = {
755 { "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" },
756 { "count", 'c', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.count, 0, "The count of messages to send, zero corresponds to infinity", "num"},
757 { "id", 'i', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.id, 0, "CAN ID of sent messages", "id"},
758 { "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"},
759 { "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
760 { "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
761 { "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
762 { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
763 { "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
764 { "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
765 { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
767 { NULL, 0, 0, NULL, 0 }
770 int parse_options(int argc, const char *argv[])
773 poptContext optCon; /* context for parsing command-line options */
774 void *local = talloc_new (NULL);
776 optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
777 //poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
779 /* Now do options processing */
780 while ((c = poptGetNextOpt(optCon)) >= 0) {
788 error(1, 0, "%s: %s\n",
789 poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
792 if (num_interfaces < 1 || num_interfaces > 3)
793 error(1, 0, "-d option must only be given one, two or three times");
795 if (opt.oneattime && opt.period_us)
796 error(1, 0, "oneattime and period cannot be specified at the same time");
799 char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
800 opt.f_msgs = fopen(f, "w");
802 error(1, errno, "fopen: %s", f);
806 char *f = talloc_asprintf(local, "%s-hist-raw.txt", opt.name);
807 opt.f_hist = fopen(f, "w");
809 error(1, errno, "fopen: %s", f);
813 char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
814 opt.f_hist_gw = fopen(f, "w");
816 error(1, errno, "fopen: %s", f);
820 char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
821 opt.f_stat = fopen(f, "w");
823 error(1, errno, "fopen: %s", f);
826 poptFreeContext(optCon);
831 void print_progress()
834 if (num_interfaces > 1)
835 printf("\rSent %5d, in progress %5d", count, msg_in_progress);
837 printf("\rSent %5d", count);
842 int main(int argc, const char *argv[])
847 parse_options(argc, argv);
849 mlockall(MCL_CURRENT | MCL_FUTURE);
851 signal(SIGINT, term_handler);
852 signal(SIGTERM, term_handler);
854 for (i=0; i<MAX_INFOS; i++)
855 msg_infos[i].id = -1;
857 histogram_init(&histogram, 5000000, 1);
858 histogram_init(&histogram_gw, 5000000, 1);
860 ret = pipe(completion_pipe);
862 error(1, errno, "pipe");
863 ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
865 error(1, errno, "pipe fcntl");
868 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
870 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -CONT -%s'",
871 getenv("LATESTER_CONTROL_HACKBENCH"));
872 printf("Running: %s\n", cmd);
876 pthread_create(&thread, 0, measure_thread, NULL);
878 struct timespec next, now, diff, allsent = {0,0};
879 clock_gettime(CLOCK_MONOTONIC, &next);
881 while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
882 struct pollfd pfd[1];
883 pfd[0].fd = completion_pipe[0];
884 pfd[0].events = POLLIN;
885 ret = poll(pfd, 1, 100);
886 if (ret == -1 && !INTERRUPTED_SYSCALL(errno))
887 error(1, errno, "poll main");
888 if (ret > 0 && (pfd[0].revents & POLLIN)) {
891 ret = read(completion_pipe[0], &mi, sizeof(mi));
892 if (ret < sizeof(mi))
893 error(1, errno, "read completion returned %d", ret);
895 msg_info_process(opt.f_msgs, mi);
900 clock_gettime(CLOCK_MONOTONIC, &now);
901 if (timespec_subtract(&diff, &next, &now)) {
903 next.tv_nsec += 100000000;
904 while (next.tv_nsec >= 1000000000) {
905 next.tv_nsec -= 1000000000;
909 if (opt.count != 0 && count >= opt.count) {
910 if (allsent.tv_sec == 0)
912 timespec_subtract(&diff, &now, &allsent);
913 if (diff.tv_sec >= 1)
921 stats.lost = msg_in_progress;
923 pthread_join(thread, NULL);
925 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
927 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -STOP -%s'",
928 getenv("LATESTER_CONTROL_HACKBENCH"));
929 printf("Running: %s\n", cmd);
933 close(completion_pipe[0]);
934 close(completion_pipe[1]);
936 histogram_fprint(&histogram, opt.f_hist);
937 histogram_fprint(&histogram_gw, opt.f_hist_gw);
941 fclose(opt.f_hist_gw);
946 struct histogram_stats hs;
947 fprintf(opt.f_stat, "cmdline='");
948 for (i=0; i<argc; i++)
949 fprintf(opt.f_stat, "%s%s", argv[i], i < argc-1 ? " " : "");
950 fprintf(opt.f_stat, "'\n");
952 timespec_subtract(&diff, &stats.tac, &stats.tic);
953 fprintf(opt.f_stat, "duration=%s # seconds\n", tstamp_str(NULL, &diff));
955 fprintf(opt.f_stat, "sent=%d\n", count);
956 fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
957 if (stats.overrun && !opt.quiet)
958 printf("overrun=%d\n", stats.overrun);
959 fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
960 if (stats.enobufs && !opt.quiet)
961 printf("enobufs=%d\n", stats.enobufs);
962 fprintf(opt.f_stat, "lost=%d\n", stats.lost);
963 if (stats.lost && !opt.quiet)
964 printf("lost=%d\n", stats.lost);
965 fprintf(opt.f_stat, "timeouts=%d\n", stats.timeouts);
966 if (stats.timeouts && !opt.quiet)
967 printf("timeouts=%d\n", stats.timeouts);
968 fprintf(opt.f_stat, "invalid_frame=%d\n", stats.timeouts);
969 if (stats.timeouts && !opt.quiet)
970 printf("invalid_frame=%d\n", stats.timeouts);
972 histogram_stats(&histogram_gw, &hs);
973 double avg = hs.count ? (double)hs.sum/hs.count : 0;
974 fprintf(opt.f_stat, "avg=%g\n", avg);
975 fprintf(opt.f_stat, "out_of_range_below=%d\n", hs.below);
976 fprintf(opt.f_stat, "out_of_range_above=%d\n", hs.above);
977 for (i = 0; i <= 20; i++)
978 fprintf(opt.f_stat, "percentile%d=%d\n", i*5, hs.percentile[i*5]);