#include "histogram.h"
+//#define FTRACE
+
#ifndef DEBUG
#define dbg(level, fmt, arg...) do {} while (0)
#else
unsigned oneattime;
FILE *file;
FILE *histogram;
+ int length;
+ int userhist;
};
struct options opt = {
.id = 10,
.period_us = 0,
.timeout_ms = 1000,
-
+ .length = 2,
};
+struct {
+ unsigned enobufs;
+ unsigned overrun;
+} stats;
+
int num_interfaces = 0;
int count = 0; /* Number of sent messages */
int completion_pipe[2];
struct timespec ts_sent, ts_sent_kern;
struct timespec ts_rx_onwire, ts_rx_onwire_kern;
struct timespec ts_rx_final, ts_rx_final_kern;
+ struct can_frame sent, received;
};
#define MAX_INFOS 10000
struct histogram histogram;
+void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
+ /* documentation see lib.h */
+
+ int i,offset;
+ int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
+
+ if (cf->can_id & CAN_ERR_FLAG) {
+ sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
+ offset = 9;
+ } else if (cf->can_id & CAN_EFF_FLAG) {
+ sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
+ offset = 9;
+ } else {
+ sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
+ offset = 4;
+ }
+
+ if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
+ sprintf(buf+offset, "R");
+ else
+ for (i = 0; i < dlc; i++) {
+ sprintf(buf+offset, "%02X", cf->data[i]);
+ offset += 2;
+ if (sep && (i+1 < dlc))
+ sprintf(buf+offset++, ".");
+ }
+}
+
static inline struct msg_info *frame2info(struct can_frame *frame)
{
uint16_t idx;
- if (frame->can_dlc == 2) {
+ if (frame->can_dlc >= 2) {
memcpy(&idx, frame->data, sizeof(idx));
if (idx >= MAX_INFOS)
error(1, 0, "%s idx too high", __FUNCTION__);
- } else
+ } else {
+
error(1, 0, "%s error", __FUNCTION__);
+ }
return &msg_infos[idx];
}
{
struct timespec diff;
void *local = talloc_new (NULL);
+ static long num = 0;
+ char sent[64], received[64];
+
+ sprint_canframe(sent, &mi->sent, true);
+ sprint_canframe(received, &mi->received, true);
#define S(ts) tstamp_str(local, &ts)
#define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
if (num_interfaces == 2)
- fprintf(f, "%s -> %s (%s) = %s (%s)\n",
- S(mi->ts_sent), S(mi->ts_rx_final_kern), S(mi->ts_rx_final),
+ 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
- fprintf(f, "%s -> %s (%s) -> %s (%s) = %s (%s), %s (%s)\n",
- S(mi->ts_sent),
- S(mi->ts_rx_onwire_kern), S(mi->ts_rx_onwire),
- S(mi->ts_rx_final_kern), S(mi->ts_rx_final),
- DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
- 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));
+ 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),
+ S(mi->ts_rx_final_kern), S(mi->ts_rx_final), received,
+ DIFF(mi->ts_sent, mi->ts_rx_onwire_kern),
+ 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));
#undef S
#undef DIFF
+ num++;
talloc_free (local);
}
{
struct timespec diff;
void *local = talloc_new (NULL);
+ static long num = 0;
#define S(ts) tstamp_str(local, &ts)
#define DIFF(a, b) (timespec_subtract(&diff, &b, &a), S(diff))
if (num_interfaces == 2)
- fprintf(f, "%d %d %s\n",
- mi->id, mi->length,
+ fprintf(f, "%ld %d %d %s\n",
+ num, mi->id, mi->length,
DIFF(mi->ts_sent, mi->ts_rx_final_kern));
else
- fprintf(f, "%d %d %s\n",
- mi->id, mi->length,
+ fprintf(f, "%ld %d %d %s\n",
+ num, mi->id, mi->length,
DIFF(mi->ts_rx_onwire_kern, mi->ts_rx_final_kern));
#undef S
#undef DIFF
{
struct timespec diff;
if (num_interfaces == 3)
- timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
+ if (opt.userhist)
+ timespec_subtract(&diff, &mi->ts_rx_final, &mi->ts_rx_onwire);
+ else
+ timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_rx_onwire_kern);
else
- timespec_subtract(&diff, &mi->ts_rx_final_kern, &mi->ts_sent);
+ 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);
return diff.tv_sec * 1000000 + diff.tv_nsec/1000;
}
clock_gettime(CLOCK_REALTIME, ts);
}
+
+int trace_fd = -1;
+int marker_fd = -1;
+
+int init_ftrace()
+{
+#ifdef FTRACE
+ char *debugfs;
+ char path[256];
+ FILE *f;
+
+ debugfs = "/sys/kernel/debug";
+ if (debugfs) {
+ strcpy(path, debugfs);
+ strcat(path,"/tracing/tracing_on");
+ trace_fd = open(path, O_WRONLY);
+ if (trace_fd >= 0)
+ write(trace_fd, "1", 1);
+
+ strcpy(path, debugfs);
+ strcat(path,"/tracing/trace_marker");
+ marker_fd = open(path, O_WRONLY);
+
+ strcpy(path, debugfs);
+ strcat(path,"/tracing/set_ftrace_pid");
+ f = fopen(path, "w");
+ fprintf(f, "%d\n", getpid());
+ fclose(f);
+ system("echo function_graph > /sys/kernel/debug/tracing/current_tracer");
+ system("echo can_send > /sys/kernel/debug/tracing/set_graph_function");
+ system("echo > /sys/kernel/debug/tracing/trace");
+ system("echo 1 > /sys/kernel/debug/tracing/tracing_enabled");
+ }
+#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;
static int curr_msg = -1;
int i;
uint16_t idx;
-
+
+ MEMSET_ZERO(frame);
i = curr_msg+1;
- while (msg_infos[i].id != 0 && i != curr_msg) {
+ while (msg_infos[i].id != -1 && i != curr_msg) {
i++;
if (i >= MAX_INFOS)
i = 0;
curr_msg = i;
frame.can_id = opt.id;
- frame.can_dlc = 2;
+ if (opt.length < 2)
+ error(1, 0, "Length < 2 is not yet supported");
+ frame.can_dlc = opt.length;
idx = curr_msg;
memcpy(frame.data, &idx, sizeof(idx));
mi = frame2info(&frame);
mi->id = frame.can_id;
mi->length = frame.can_dlc;
get_tstamp(&mi->ts_sent);
+ mi->sent = frame;
+
+ trace_on();
ret = write(socket, &frame, sizeof(frame));
- return ret;
-}
+ trace_off(ret);
-void msg_info_free(struct msg_info *mi)
-{
- mi->id = 0;
+ if (ret == -1)
+ msg_info_free(mi);
+ return ret;
}
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;
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));
pfd[i].events = POLLIN;
}
- set_sched_policy_and_prio(SCHED_FIFO, 99);
-
-#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++; \
+ set_sched_policy_and_prio(SCHED_FIFO, 40);
+
+#define SEND() \
+ do { \
+ ret = send_frame(pfd[0].fd); \
+ 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++; \
+ } \
} while (0)
if (opt.oneattime) {
{ "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"},
+ { "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"},
POPT_AUTOHELP
{ NULL, 0, 0, NULL, 0 }
};
{
pthread_t thread;
sigset_t set;
- int ret;
+ int ret, i;
parse_options(argc, argv);
signal(SIGINT, term_handler);
signal(SIGTERM, term_handler);
+ for (i=0; i<MAX_INFOS; i++)
+ msg_infos[i].id = -1;
+
if (opt.histogram) {
- histogram_init(&histogram, 1000000, 1);
+ histogram_init(&histogram, 5000000, 1);
}
ret = pipe(completion_pipe);
ret = fcntl(completion_pipe[1], F_SETFL, O_NONBLOCK);
if (ret == -1)
error(1, errno, "pipe fcntl");
+
+ init_ftrace();
pthread_create(&thread, 0, measure_thread, NULL);
if (opt.file)
fclose(opt.file);
+ if (stats.overrun)
+ printf("overrun=%d\n", stats.overrun);
+ if (stats.enobufs)
+ printf("enobufs=%d\n", stats.enobufs);
+
return 0;
}
projects / can-benchmark.git / blobdiff