unsigned timeout_ms;
unsigned count;
unsigned oneattime;
- FILE *file;
- FILE *histogram;
+ char *name;
int length;
int userhist;
+ int quiet;
+
+ /* Temporary variables */
+ FILE *f_msgs;
+ FILE *f_hist;
+ FILE *f_stat;
};
struct options opt = {
.length = 2,
};
+struct {
+ unsigned enobufs;
+ unsigned overrun;
+ unsigned lost;
+} stats;
+
int num_interfaces = 0;
int count = 0; /* Number of sent messages */
+unsigned msg_in_progress = 0;
int completion_pipe[2];
struct msg_info {
if (idx >= MAX_INFOS)
error(1, 0, "%s idx too high", __FUNCTION__);
} else {
-
+
error(1, 0, "%s error", __FUNCTION__);
}
return &msg_infos[idx];
#define S(ts) tstamp_str(local, &ts)
#define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
- if (num_interfaces == 2)
+ switch (num_interfaces) {
+ case 2:
fprintf(f, "%ld: %s %s -> %s (%s) %s = %s (%s)\n",
num, S(mi->ts_sent), sent, S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
DIFF(mi->ts_sent, mi->ts_rx_final_kern),
DIFF(mi->ts_sent, mi->ts_rx_final));
- else
+ break;
+ case 3:
fprintf(f, "%ld: %s %s -> %s (%s) -> %s (%s) %s = %s (%s), %s (%s)\n",
num, S(mi->ts_sent), sent,
S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
DIFF(mi->ts_sent, mi->ts_rx_onwire),
DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern),
DIFF(mi->ts_rx_onwire, mi->ts_rx_final));
+ break;
+ }
#undef S
#undef DIFF
num++;
#define S(ts) tstamp_str(local, &ts)
#define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
- if (num_interfaces == 2)
+ switch (num_interfaces) {
+ case 2:
fprintf(f, "%ld %d %d %s\n",
num, mi->id, mi->length,
DIFF(mi->ts_sent, mi->ts_rx_final_kern));
- else
+ break;
+ case 3:
fprintf(f, "%ld %d %d %s\n",
num, mi->id, mi->length,
DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern));
+ break;
+ }
#undef S
#undef DIFF
talloc_free (local);
static inline unsigned get_msg_latency_us(struct msg_info *mi)
{
struct timespec diff;
- if (num_interfaces == 3)
+ switch (num_interfaces) {
+ case 2:
if (opt.userhist)
- timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
- else
timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
- else
+ else
+ timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
+ break;
+ case 3:
if (opt.userhist)
timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_sent);
else
timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
+ break;
+ default:
+ return 0;
+ }
return diff.tv_sec * 1000000 + diff.tv_nsec/1000;
}
char *debugfs;
char path[256];
FILE *f;
-
+
debugfs = "/sys/kernel/debug";
if (debugfs) {
strcpy(path, debugfs);
#endif /* FTRACE */
}
+static inline void trace_on()
+{
+ if (trace_fd >= 0)
+ write(trace_fd, "1", 1);
+}
+
+static inline void trace_off(int ret)
+{
+ if (marker_fd >= 0) {
+ char marker[100];
+ sprintf(marker, "write returned %d\n", ret);
+ write(marker_fd, marker, strlen(marker));
+ }
+ if (trace_fd >= 0)
+ write(trace_fd, "0", 1);
+}
+
+void msg_info_free(struct msg_info *mi)
+{
+ mi->id = -1;
+}
+
int send_frame(int socket)
{
struct can_frame frame;
mi->length = frame.can_dlc;
get_tstamp(&mi->ts_sent);
mi->sent = frame;
-
- if (trace_fd >= 0)
- write(trace_fd, "1", 1);
+
+ trace_on();
ret = write(socket, &frame, sizeof(frame));
- if (marker_fd >= 0) {
- char marker[100];
- sprintf(marker, "write returned %d\n", ret);
- write(marker_fd, marker, strlen(marker));
- }
- if (trace_fd >= 0)
- write(trace_fd, "0", 1);
+ trace_off(ret);
+
+ if (ret == -1 || num_interfaces == 1)
+ msg_info_free(mi);
return ret;
}
-void msg_info_free(struct msg_info *mi)
+static inline send_and_check(int s)
{
- mi->id = -1;
+ int ret;
+ ret = send_frame(s);
+ if (ret != sizeof(struct can_frame)) {
+/* if (ret == -1 && errno == ENOBUFS && opt.period_us == 0 && !opt.oneattime) { */
+/* stats.enobufs++; */
+/* /\* Ignore this error - pfifo_fast qeuue is full *\/ */
+/* } else */
+ error(1, errno, "send_frame (line %d)", __LINE__);
+ } else {
+ count++;
+ msg_in_progress++;
+ }
}
static inline void get_next_timeout(struct timespec *timeout)
last.tv_nsec -= 1000000000;
last.tv_sec++;
}
- timespec_subtract(timeout, &last, &now);
+ if (timespec_subtract(timeout, &last, &now) /* is negative */) {
+ stats.overrun++;
+ memset(timeout, 0, sizeof(*timeout));
+ }
} else if (opt.timeout_ms != 0) {
timeout->tv_sec = opt.timeout_ms/1000;
timeout->tv_nsec = (opt.timeout_ms%1000)*1000000;
struct can_frame frame;
struct msg_info *mi;
int ret;
-
+
receive(s, &frame, &ts_kern, &ts_user);
mi = frame2info(&frame);
mi->ts_rx_final_kern = ts_kern;
mi->ts_rx_final = ts_user;
mi->received = frame;
- if (opt.histogram)
- histogram_add(&histogram, get_msg_latency_us(mi));
+ histogram_add(&histogram, get_msg_latency_us(mi));
ret = write(completion_pipe[1], &mi, sizeof(mi));
if (ret == -1)
struct timespec timeout;
struct sockaddr_can addr;
sigset_t set;
- unsigned msg_in_progress = 0;
MEMSET_ZERO(pfd);
pfd[i].events = POLLIN;
}
- set_sched_policy_and_prio(SCHED_FIFO, 99);
+ set_sched_policy_and_prio(SCHED_FIFO, 40);
-#define SEND() \
- do { \
- ret = send_frame(pfd[0].fd); \
- if (ret != sizeof(struct can_frame)) \
- error(1, errno, "send_frame (line %d)", __LINE__); \
- count++; \
- msg_in_progress++; \
- } while (0)
+#define SEND() send_and_check(pfd[0].fd)
- if (opt.oneattime) {
+ if (opt.oneattime)
SEND();
- count = 1;
- }
while (!finish_flag &&
(opt.count == 0 || count < opt.count || msg_in_progress != 0)) {
{ "timeout",'t', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.timeout_ms,0, "Timeout when period is zero", "ms"},
{ "oneattime",'o', POPT_ARG_NONE, &opt.oneattime,0, "Send the next message only when the previous was finally received"},
{ "verbose",'v', POPT_ARG_NONE, NULL, 'v', "Send the next message only when the previous was finally received"},
- { "file", 'f', POPT_ARG_STRING, NULL, 'f', "File where to store results", "filename"},
- { "histogram", 'h', POPT_ARG_STRING, NULL, 'h', "Store histogram in file", "filename"},
+ { "name", 'n', POPT_ARG_STRING, &opt.name, 0, "Prefix of the generated files"},
{ "length", 'l', POPT_ARG_INT|POPT_ARGFLAG_SHOW_DEFAULT, &opt.length, 0, "The length of generated messages", "bytes"},
{ "userhist", 'u', POPT_ARG_NONE, &opt.userhist, 0, "Generate histogram from userspace timestamps"},
+ { "quiet", 'q', POPT_ARG_NONE, &opt.quiet, 0, "Do not print progress and statistics"},
POPT_AUTOHELP
{ NULL, 0, 0, NULL, 0 }
};
{
int c;
poptContext optCon; /* context for parsing command-line options */
+ void *local = talloc_new (NULL);
optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
//poptSetOtherOptionHelp(optCon, "[OPTIONS]* <port>");
case 'd':
num_interfaces++;
break;
- case 'f':
- opt.file = fopen(poptGetOptArg(optCon), "w");
- if (!opt.file)
- error(1, errno, "fopen: %s", poptGetOptArg(optCon));
- break;
- case 'h':
- opt.histogram = fopen(poptGetOptArg(optCon), "w");
- if (!opt.histogram)
- error(1, errno, "fopen: %s", poptGetOptArg(optCon));
- break;
}
}
if (c < -1)
poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
poptStrerror(c));
- if (num_interfaces < 2 || num_interfaces > 3)
- error(1, 0, "-d option must be given exactly 2 or 3 times");
+ if (num_interfaces < 1 || num_interfaces > 3)
+ error(1, 0, "-d option must only be given one, two or three times");
if (opt.oneattime && opt.period_us)
error(1, 0, "oneattime and period cannot be specified at the same time");
- poptFreeContext(optCon);
+ if (opt.name) {
+ char *f = talloc_asprintf(local, "%s-msgs.txt", opt.name);
+ opt.f_msgs = fopen(f, "w");
+ if (!opt.f_msgs)
+ error(1, errno, "fopen: %s", f);
+ }
+
+ if (opt.name) {
+ char *f = talloc_asprintf(local, "%s-hist.txt", opt.name);
+ opt.f_hist = fopen(f, "w");
+ if (!opt.f_hist)
+ error(1, errno, "fopen: %s", f);
+ }
+
+ if (opt.name) {
+ char *f = talloc_asprintf(local, "%s-stat.txt", opt.name);
+ opt.f_stat = fopen(f, "w");
+ if (!opt.f_stat)
+ error(1, errno, "fopen: %s", f);
+ }
+ poptFreeContext(optCon);
+ talloc_free(local);
return 0;
}
+void print_progress()
+{
+ if (! opt.quiet) {
+ if (num_interfaces > 1)
+ printf("\rSent %5d, in progress %5d", count, msg_in_progress);
+ else
+ printf("\rSent %5d", count);
+ fflush(stdout);
+ }
+}
int main(int argc, const char *argv[])
{
for (i=0; i<MAX_INFOS; i++)
msg_infos[i].id = -1;
- if (opt.histogram) {
- histogram_init(&histogram, 5000000, 1);
- }
+ histogram_init(&histogram, 5000000, 1);
ret = pipe(completion_pipe);
if (ret == -1)
error(1, errno, "pipe fcntl");
init_ftrace();
-
+
pthread_create(&thread, 0, measure_thread, NULL);
- struct timespec next, now, diff;
+ struct timespec next, now, diff, allsent = {0,0};
clock_gettime(CLOCK_MONOTONIC, &next);
int completed = 0;
while (!finish_flag && (opt.count == 0 || completed < opt.count)) {
ret = read(completion_pipe[0], &mi, sizeof(mi));
if (ret < sizeof(mi))
error(1, errno, "read completion returned %d", ret);
- if (opt.file)
- msg_info_print(opt.file, mi);
+ msg_info_print(opt.f_msgs, mi);
msg_info_free(mi);
completed++;
}
clock_gettime(CLOCK_MONOTONIC, &now);
if (timespec_subtract(&diff, &next, &now)) {
- printf("\rMessage %d", count);
- fflush(stdout);
- next.tv_nsec += 100000000;
+ print_progress();
+ next.tv_nsec += 100000000;
while (next.tv_nsec >= 1000000000) {
next.tv_nsec -= 1000000000;
next.tv_sec++;
}
}
+ if (opt.count != 0 && count >= opt.count) {
+ if (allsent.tv_sec == 0)
+ allsent = now;
+ timespec_subtract(&diff, &now, &allsent);
+ if (diff.tv_sec >= 1)
+ finish_flag = 1;
+ }
}
- printf("\rMessage %d\n", count);
+ print_progress();
+ if (!opt.quiet)
+ printf("\n");
+
+ stats.lost = msg_in_progress;
pthread_join(thread, NULL);
close(completion_pipe[0]);
close(completion_pipe[1]);
- if (opt.histogram) {
- histogram_fprint(&histogram, opt.histogram);
- fclose(opt.histogram);
- }
- if (opt.file)
- fclose(opt.file);
+ histogram_fprint(&histogram, opt.f_hist);
+ fclose(opt.f_hist);
+ fclose(opt.f_msgs);
+
+
+ fprintf(opt.f_stat, "sent=%d\n", count);
+ fprintf(opt.f_stat, "overrun=%d\n", stats.overrun);
+ if (stats.overrun && !opt.quiet)
+ printf("overrun=%d\n", stats.overrun);
+ fprintf(opt.f_stat, "enobufs=%d\n", stats.enobufs);
+ if (stats.enobufs && !opt.quiet)
+ printf("enobufs=%d\n", stats.enobufs);
+ fprintf(opt.f_stat, "lost=%d\n", stats.lost);
+ if (stats.lost && !opt.quiet)
+ printf("lost=%d\n", stats.lost);
+
+ fclose(opt.f_stat);
return 0;
}