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];
101 struct timespec ts_sent, ts_sent_kern;
102 struct timespec ts_rx_onwire, ts_rx_onwire_kern;
103 struct timespec ts_rx_final, ts_rx_final_kern;
104 struct can_frame sent, received;
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, const struct timespec *x, const struct timespec *yy);
167 static inline unsigned get_timestamp_diff_us(struct msg_info *mi);
169 void msg_info_process(FILE *f, struct msg_info *mi)
171 struct timespec diff;
172 void *local = talloc_new (NULL);
174 char sent[64], received[64];
175 int diff_us = get_timestamp_diff_us(mi);
176 int tx_time_us = calc_frame_length(&mi->received);
178 /* Update histograms */
179 histogram_add(&histogram, diff_us);
180 histogram_add(&histogram_gw, diff_us - tx_time_us);
185 /* Print information to a file */
186 sprint_canframe(sent, &mi->sent, true);
187 sprint_canframe(received, &mi->received, true);
189 #define S(ts) tstamp_str(local, &ts)
190 #define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
192 switch (num_interfaces) {
194 fprintf(f, "%ld: %s %s -> %s (%s) %s = %s (%s) %d\n",
195 num, S(mi->ts_sent), sent, S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
196 DIFF(mi->ts_sent, mi->ts_rx_final_kern),
197 DIFF(mi->ts_sent, mi->ts_rx_final),
201 fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s) %d %.6f\n",
202 num, S(mi->ts_sent), sent,
203 S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
204 S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
205 DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
206 DIFF(mi->ts_sent, mi->ts_rx_onwire),
207 DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
208 DIFF(mi->ts_rx_onwire, mi->ts_rx_final),
210 1e-6*(diff_us - tx_time_us));
219 /* Subtract the `struct timespec' values X and Y, storing the result in
220 RESULT. Return 1 if the difference is negative, otherwise 0. */
222 int timespec_subtract (struct timespec *result, const struct timespec *x, const struct timespec *yy)
224 struct timespec ylocal = *yy, *y = &ylocal;
225 /* Perform the carry for the later subtraction by updating Y. */
226 if (x->tv_nsec < y->tv_nsec) {
227 int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
228 y->tv_nsec -= 1000000000 * nsec;
231 if (x->tv_nsec - y->tv_nsec > 1000000000) {
232 int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
233 y->tv_nsec += 1000000000 * nsec;
237 /* Compute the time remaining to wait.
238 `tv_nsec' is certainly positive. */
239 result->tv_sec = x->tv_sec - y->tv_sec;
240 result->tv_nsec = x->tv_nsec - y->tv_nsec;
242 /* Return 1 if result is negative. */
243 return x->tv_sec < y->tv_sec;
246 void dbg_print_timespec(char *msg, struct timespec *tv)
249 printf("%s sec=%ld nsec=%ld\n", msg, tv->tv_sec, tv->tv_nsec);
252 static inline unsigned get_timestamp_diff_us(struct msg_info *mi)
254 struct timespec diff;
255 switch (num_interfaces) {
258 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
260 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
264 timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
266 timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
271 unsigned us = diff.tv_sec * 1000000 + diff.tv_nsec/1000;
275 void set_sched_policy_and_prio(int policy, int rtprio)
277 struct sched_param scheduling_parameters;
278 int maxprio=sched_get_priority_max(policy);
279 int minprio=sched_get_priority_min(policy);
281 if((rtprio < minprio) || (rtprio > maxprio))
282 error(1, 0, "The priority for requested policy is out of <%d, %d> range\n",
285 scheduling_parameters.sched_priority = rtprio;
287 if (0 != pthread_setschedparam(pthread_self(), policy, &scheduling_parameters))
288 error(1, errno, "pthread_setschedparam error");
291 void term_handler(int signum)
296 static inline int sock_get_if_index(int s, const char *if_name)
301 strcpy(ifr.ifr_name, if_name);
302 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
303 error(1, errno, "SIOCGIFINDEX '%s'", if_name);
304 return ifr.ifr_ifindex;
307 static inline void get_tstamp(struct timespec *ts)
309 clock_gettime(CLOCK_MONOTONIC/*REALTIME*/, ts);
323 debugfs = "/sys/kernel/debug";
325 strcpy(path, debugfs);
326 strcat(path,"/tracing/tracing_on");
327 trace_fd = open(path, O_WRONLY);
329 write(trace_fd, "1", 1);
331 strcpy(path, debugfs);
332 strcat(path,"/tracing/trace_marker");
333 marker_fd = open(path, O_WRONLY);
335 strcpy(path, debugfs);
336 strcat(path,"/tracing/set_ftrace_pid");
337 f = fopen(path, "w");
338 fprintf(f, "%d\n", getpid());
340 system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
341 system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
342 system("echo > /sys/kernel/debug/tracing/trace");
343 system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
348 static inline void trace_on()
351 write(trace_fd, "1", 1);
354 static inline void trace_off(int ret)
356 if (marker_fd >= 0) {
358 sprintf(marker, "write returned %d\n", ret);
359 write(marker_fd, marker, strlen(marker));
362 write(trace_fd, "0", 1);
365 static inline void msg_info_free(struct msg_info *mi)
370 static inline bool msg_info_used(struct msg_info *mi)
375 int send_frame(int socket)
377 struct can_frame frame;
380 static int curr_msg = -1;
386 while (msg_info_used(&msg_infos[i]) && i != curr_msg) {
392 error(1, 0, "Msg info table is full! Probably, many packets were lost.");
396 frame.can_id = opt.id;
398 error(1, 0, "Length < 2 is not yet supported");
399 frame.can_dlc = opt.length;
401 memcpy(frame.data, &idx, sizeof(idx));
402 mi = frame2info(&frame);
404 mi->id = frame.can_id;
405 mi->length = frame.can_dlc;
406 get_tstamp(&mi->ts_sent);
410 ret = write(socket, &frame, sizeof(frame));
413 if (ret == -1 || num_interfaces == 1)
418 static inline void send_and_check(int s)
422 if (ret != sizeof(struct can_frame)) {
423 /* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
424 /* stats.enobufs++; */
425 /* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
427 error(1, errno, "send_frame (line %d)", __LINE__);
434 static inline void get_next_timeout(struct timespec *timeout, bool advance)
437 static struct timespec last = {-1, 0 };
439 clock_gettime(CLOCK_MONOTONIC, &now);
441 if (last.tv_sec == -1) {
443 last.tv_nsec = last.tv_nsec/1000000*1000000;
445 if (opt.period_us != 0) {
447 last.tv_sec += opt.period_us/1000000;
448 last.tv_nsec += (opt.period_us%1000000)*1000;
449 while (last.tv_nsec >= 1000000000) {
450 last.tv_nsec -= 1000000000;
454 if (timespec_subtract(timeout, &last, &now) /* is negative */) {
456 memset(timeout, 0, sizeof(*timeout));
458 /* printf("next %ld.%06ld now %ld.%06ld --> timeout %ld.%06ld\n", */
459 /* last.tv_sec, last.tv_nsec/1000, */
460 /* now.tv_sec, now.tv_nsec/1000, */
461 /* timeout->tv_sec, timeout->tv_nsec/1000); */
462 } else if (opt.timeout_ms != 0) {
463 timeout->tv_sec = opt.timeout_ms/1000;
464 timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
466 error(1, 0, "Timeout and period cannot be both zero");
469 void receive(int s, struct can_frame *frame, struct timespec *ts_kern, struct timespec *ts_user)
471 char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
474 struct cmsghdr *cmsg;
475 struct sockaddr_can addr;
477 static uint64_t dropcnt = 0;
478 bool have_hwtstamp = 0;
480 iov.iov_base = frame;
481 msg.msg_name = &addr;
484 msg.msg_control = &ctrlmsg;
486 /* these settings may be modified by recvmsg() */
487 iov.iov_len = sizeof(*frame);
488 msg.msg_namelen = sizeof(addr);
489 msg.msg_controllen = sizeof(ctrlmsg);
492 nbytes = recvmsg(s, &msg, 0);
494 error(1, errno, "recvmsg");
496 if (nbytes < sizeof(struct can_frame))
497 error(1, 0, "recvmsg: incomplete CAN frame\n");
500 MEMSET_ZERO(*ts_kern);
501 for (cmsg = CMSG_FIRSTHDR(&msg);
502 cmsg && (cmsg->cmsg_level == SOL_SOCKET);
503 cmsg = CMSG_NXTHDR(&msg,cmsg)) {
504 if (cmsg->cmsg_type == SO_TIMESTAMPNS) {
506 memcpy(ts_kern, CMSG_DATA(cmsg), sizeof(struct timespec));
508 else if (cmsg->cmsg_type == SO_TIMESTAMPING) {
509 struct timespec *ts = (struct timespec *) CMSG_DATA(cmsg);
510 memcpy(ts_kern, &ts[2], sizeof(struct timespec));
513 else if (cmsg->cmsg_type == SO_RXQ_OVFL) {
515 memcpy(&ovfl, CMSG_DATA(cmsg), sizeof(ovfl));
522 void process_tx(int s)
524 error(1, 0, "%s: not implemented", __FUNCTION__);
527 void process_on_wire_rx(int s)
529 struct timespec ts_kern, ts_user;
530 struct can_frame frame;
532 receive(s, &frame, &ts_kern, &ts_user);
533 mi = frame2info(&frame);
534 if (msg_info_used(mi)) {
535 mi->ts_rx_onwire_kern = ts_kern;
536 mi->ts_rx_onwire = ts_user;
538 stats.invalid_frame++;
542 void process_final_rx(int s)
544 struct timespec ts_kern, ts_user;
545 struct can_frame frame;
549 receive(s, &frame, &ts_kern, &ts_user);
550 mi = frame2info(&frame);
551 mi->ts_rx_final_kern = ts_kern;
552 mi->ts_rx_final = ts_user;
553 mi->received = frame;
555 ret = write(completion_pipe[1], &mi, sizeof(mi));
557 error(1, errno, "completion_pipe write");
560 void *measure_thread(void *arg)
563 struct pollfd pfd[3];
564 struct timespec timeout;
565 struct sockaddr_can addr;
566 int consecutive_timeouts = 0;
570 for (i=0; i<num_interfaces; i++) {
571 if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0)
572 error(1, errno, "socket");
574 addr.can_family = AF_CAN;
575 addr.can_ifindex = sock_get_if_index(s, opt.interface[i]);
577 if (i == 0) { /* TX socket */
578 /* disable default receive filter on this RAW socket */
579 /* This is obsolete as we do not read from the socket at all, but for */
580 /* this reason we can remove the receive list in the Kernel to save a */
581 /* little (really a very little!) CPU usage. */
582 if (setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0) == -1)
583 error(1, errno, "SOL_CAN_RAW");
586 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
587 error(1, errno, "bind");
589 // TODO: set HW TSTAMP flags?
590 const int so_timestamping_flags = SOF_TIMESTAMPING_RAW_HARDWARE;
591 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPING,
592 &so_timestamping_flags,
593 sizeof(so_timestamping_flags)) < 0)
595 perror("setsockopt SO_TIMESTAMPING");
596 fprintf(stderr, "Falling back to SW timestamps.\n");
598 const int timestamp_on = 1;
599 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMPNS,
600 ×tamp_on, sizeof(timestamp_on)) < 0)
601 error(1, errno, "setsockopt SO_TIMESTAMPNS");
604 const int dropmonitor_on = 1;
605 if (setsockopt(s, SOL_SOCKET, SO_RXQ_OVFL,
606 &dropmonitor_on, sizeof(dropmonitor_on)) < 0)
607 error(1, errno, "setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
611 pfd[i].events = POLLIN | POLLERR | ((opt.period_us == 0 && !opt.oneattime) ? POLLOUT : 0);
613 pfd[i].events = POLLIN;
616 set_sched_policy_and_prio(SCHED_FIFO, 40);
618 #define SEND() send_and_check(pfd[0].fd)
623 get_tstamp(&stats.tic);
625 while (!finish_flag &&
626 (opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
628 get_next_timeout(&timeout, ret == 0);
629 //printf("timeout %ld.%06ld\n", timeout.tv_sec, timeout.tv_nsec/1000);
630 //printf("ppoll"); fflush(stdout);
631 ret = ppoll(pfd, num_interfaces, &timeout, NULL);
632 //printf("=%d\n", ret);
635 if (!INTERRUPTED_SYSCALL(errno))
636 error(1, errno, "ppoll");
640 if (opt.count == 0 || count < opt.count) {
644 /* Lost message - send a new one */
646 consecutive_timeouts++;
647 if (consecutive_timeouts < 10)
649 else /* Something is really broken */
654 if (pfd[0].revents & (POLLIN|POLLERR)) {
655 process_tx(pfd[0].fd);
657 if (pfd[0].revents & POLLOUT) {
658 if (opt.count == 0 || count < opt.count)
663 if (num_interfaces == 3 && pfd[1].revents & POLLIN) {
664 process_on_wire_rx(pfd[1].fd);
667 if (num_interfaces == 3 && pfd[1].revents & ~POLLIN)
668 error(1, 0, "Unexpected pfd[1].revents: 0x%04x\n", pfd[1].revents);
670 i = (num_interfaces == 2) ? 1 : 2;
671 if (pfd[i].revents & POLLIN) {
672 consecutive_timeouts = 0;
673 process_final_rx(pfd[i].fd);
676 if ((opt.count == 0 || count < opt.count) &&
681 if (pfd[i].revents & ~POLLIN)
682 error(1, 0, "Unexpected pfd[%d].revents: 0x%04x\n", i, pfd[i].revents);
686 get_tstamp(&stats.tac);
688 for (i=0; i<num_interfaces; i++)
694 struct poptOption optionsTable[] = {
695 { "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" },
696 { "count", 'c', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.count, 0, "The count of messages to send, zero corresponds to infinity", "num"},
697 { "id", 'i', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.id, 0, "CAN ID of sent messages", "id"},
698 { "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"},
699 { "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
700 { "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
701 { "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
702 { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
703 { "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
704 { "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
705 { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
707 { NULL, 0, 0, NULL, 0 }
710 int parse_options(int argc, const char *argv[])
713 poptContext optCon; /* context for parsing command-line options */
714 void *local = talloc_new (NULL);
716 optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
717 //poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
719 /* Now do options processing */
720 while ((c = poptGetNextOpt(optCon)) >= 0) {
728 error(1, 0, "%s: %s\n",
729 poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
732 if (num_interfaces < 1 || num_interfaces > 3)
733 error(1, 0, "-d option must only be given one, two or three times");
735 if (opt.oneattime && opt.period_us)
736 error(1, 0, "oneattime and period cannot be specified at the same time");
739 char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
740 opt.f_msgs = fopen(f, "w");
742 error(1, errno, "fopen: %s", f);
746 char *f = talloc_asprintf(local, "%s-hist-raw.txt", opt.name);
747 opt.f_hist = fopen(f, "w");
749 error(1, errno, "fopen: %s", f);
753 char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
754 opt.f_hist_gw = fopen(f, "w");
756 error(1, errno, "fopen: %s", f);
760 char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
761 opt.f_stat = fopen(f, "w");
763 error(1, errno, "fopen: %s", f);
766 poptFreeContext(optCon);
771 void print_progress()
774 if (num_interfaces > 1)
775 printf("\rSent %5d, in progress %5d", count, msg_in_progress);
777 printf("\rSent %5d", count);
782 int main(int argc, const char *argv[])
787 parse_options(argc, argv);
789 mlockall(MCL_CURRENT | MCL_FUTURE);
791 signal(SIGINT, term_handler);
792 signal(SIGTERM, term_handler);
794 for (i=0; i<MAX_INFOS; i++)
795 msg_infos[i].id = -1;
797 histogram_init(&histogram, 5000000, 1);
798 histogram_init(&histogram_gw, 5000000, 1);
800 ret = pipe(completion_pipe);
802 error(1, errno, "pipe");
803 ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
805 error(1, errno, "pipe fcntl");
808 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
810 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -CONT -%s'",
811 getenv("LATESTER_CONTROL_HACKBENCH"));
812 printf("Running: %s\n", cmd);
816 pthread_create(&thread, 0, measure_thread, NULL);
818 struct timespec next, now, diff, allsent = {0,0};
819 clock_gettime(CLOCK_MONOTONIC, &next);
821 while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
822 struct pollfd pfd[1];
823 pfd[0].fd = completion_pipe[0];
824 pfd[0].events = POLLIN;
825 ret = poll(pfd, 1, 100);
826 if (ret == -1 && !INTERRUPTED_SYSCALL(errno))
827 error(1, errno, "poll main");
828 if (ret > 0 && (pfd[0].revents & POLLIN)) {
831 ret = read(completion_pipe[0], &mi, sizeof(mi));
832 if (ret < sizeof(mi))
833 error(1, errno, "read completion returned %d", ret);
835 msg_info_process(opt.f_msgs, mi);
840 clock_gettime(CLOCK_MONOTONIC, &now);
841 if (timespec_subtract(&diff, &next, &now)) {
843 next.tv_nsec += 100000000;
844 while (next.tv_nsec >= 1000000000) {
845 next.tv_nsec -= 1000000000;
849 if (opt.count != 0 && count >= opt.count) {
850 if (allsent.tv_sec == 0)
852 timespec_subtract(&diff, &now, &allsent);
853 if (diff.tv_sec >= 1)
861 stats.lost = msg_in_progress;
863 pthread_join(thread, NULL);
865 if (getenv("LATESTER_CONTROL_HACKBENCH")) {
867 sprintf(cmd, "ssh -x -a -S $HOME/.ssh/cangw-connection root@192.168.2.3 'kill -STOP -%s'",
868 getenv("LATESTER_CONTROL_HACKBENCH"));
869 printf("Running: %s\n", cmd);
873 close(completion_pipe[0]);
874 close(completion_pipe[1]);
876 histogram_fprint(&histogram, opt.f_hist);
877 histogram_fprint(&histogram_gw, opt.f_hist_gw);
881 fclose(opt.f_hist_gw);
886 struct histogram_stats hs;
887 fprintf(opt.f_stat, "cmdline='");
888 for (i=0; i<argc; i++)
889 fprintf(opt.f_stat, "%s%s", argv[i], i < argc-1 ? " " : "");
890 fprintf(opt.f_stat, "'\n");
892 timespec_subtract(&diff, &stats.tac, &stats.tic);
893 fprintf(opt.f_stat, "duration=%s # seconds\n", tstamp_str(NULL, &diff));
895 fprintf(opt.f_stat, "sent=%d\n", count);
896 fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
897 if (stats.overrun && !opt.quiet)
898 printf("overrun=%d\n", stats.overrun);
899 fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
900 if (stats.enobufs && !opt.quiet)
901 printf("enobufs=%d\n", stats.enobufs);
902 fprintf(opt.f_stat, "lost=%d\n", stats.lost);
903 if (stats.lost && !opt.quiet)
904 printf("lost=%d\n", stats.lost);
905 fprintf(opt.f_stat, "timeouts=%d\n", stats.timeouts);
906 if (stats.timeouts && !opt.quiet)
907 printf("timeouts=%d\n", stats.timeouts);
908 fprintf(opt.f_stat, "invalid_frame=%d\n", stats.timeouts);
909 if (stats.timeouts && !opt.quiet)
910 printf("invalid_frame=%d\n", stats.timeouts);
912 histogram_stats(&histogram_gw, &hs);
913 double avg = hs.count ? (double)hs.sum/hs.count : 0;
914 fprintf(opt.f_stat, "avg=%g\n", avg);
915 fprintf(opt.f_stat, "out_of_range_below=%d\n", hs.below);
916 fprintf(opt.f_stat, "out_of_range_above=%d\n", hs.above);
917 for (i = 0; i <= 20; i++)
918 fprintf(opt.f_stat, "percentile%d=%d\n", i*5, hs.percentile[i*5]);