const char *indent6 = " ";
const char *indent8 = " ";
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-list.1.h>
+;
+#endif
+
enum {
OPT_HELP = 1,
OPT_USERSPACE,
static struct lttng_handle *handle;
static struct mi_writer *writer;
+/* Only set when listing a single session. */
+static struct lttng_session listed_session;
+
static struct poptOption long_options[] = {
/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
{0, 0, 0, 0, 0, 0, 0}
};
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng list [OPTIONS] [SESSION [SESSION OPTIONS]]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "With no arguments, list available tracing session(s)\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Without a session, -k lists available kernel events\n");
- fprintf(ofp, "Without a session, -u lists available userspace events\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -k, --kernel Select kernel domain\n");
- fprintf(ofp, " -u, --userspace Select user-space domain.\n");
- fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
- fprintf(ofp, " -l, --log4j Apply for Java application using LOG4J\n");
- fprintf(ofp, " -p, --python Apply for Python application using logging\n");
- fprintf(ofp, " -f, --fields List event fields.\n");
- fprintf(ofp, " --syscall List available system calls.\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Session Options:\n");
- fprintf(ofp, " -c, --channel NAME List details of a channel\n");
- fprintf(ofp, " -d, --domain List available domain(s)\n");
- fprintf(ofp, "\n");
-}
-
/*
* Get command line from /proc for a specific pid.
*
int event_element_open = 0;
struct lttng_event cur_event;
+ memset(&cur_event, 0, sizeof(cur_event));
+
/* Open domains element */
ret = mi_lttng_domains_open(writer);
if (ret) {
if (cur_pid != fields[i].event.pid) {
if (pid_element_open) {
if (event_element_open) {
-
/* Close the previous field element and event. */
ret = mi_lttng_close_multi_element(writer, 2);
if (ret) {
static void print_channel(struct lttng_channel *channel)
{
int ret;
- uint64_t discarded_events, lost_packets;
+ uint64_t discarded_events, lost_packets, monitor_timer_interval;
+ int64_t blocking_timeout;
ret = lttng_channel_get_discarded_event_count(channel,
&discarded_events);
return;
}
+ ret = lttng_channel_get_monitor_timer_interval(channel,
+ &monitor_timer_interval);
+ if (ret) {
+ ERR("Failed to retrieve monitor interval of channel");
+ return;
+ }
+
+ ret = lttng_channel_get_blocking_timeout(channel,
+ &blocking_timeout);
+ if (ret) {
+ ERR("Failed to retrieve blocking timeout of channel");
+ return;
+ }
+
MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
MSG("%sAttributes:", indent4);
MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
- MSG("%ssubbufers size: %" PRIu64, indent6, channel->attr.subbuf_size);
- MSG("%snumber of subbufers: %" PRIu64, indent6, channel->attr.num_subbuf);
- MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
- MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
+ MSG("%ssubbuffers size: %" PRIu64 " bytes", indent6, channel->attr.subbuf_size);
+ MSG("%snumber of subbuffers: %" PRIu64, indent6, channel->attr.num_subbuf);
+ MSG("%sswitch timer interval: %u µs", indent6, channel->attr.switch_timer_interval);
+ MSG("%sread timer interval: %u µs", indent6, channel->attr.read_timer_interval);
+ MSG("%smonitor timer interval: %" PRIu64 " µs", indent6, monitor_timer_interval);
+ MSG("%sblocking timeout: %" PRId64 " µs", indent6, blocking_timeout);
MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
- MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
- MSG("%sdiscarded events: %" PRIu64, indent6, discarded_events);
- MSG("%slost packets: %" PRIu64, indent6, lost_packets);
+ MSG("%strace file size: %" PRIu64 " bytes", indent6, channel->attr.tracefile_size);
switch (channel->attr.output) {
case LTTNG_EVENT_SPLICE:
MSG("%soutput: splice()", indent6);
MSG("%soutput: mmap()", indent6);
break;
}
+
+ if (!listed_session.snapshot_mode) {
+ /*
+ * The lost packet count is omitted for sessions in snapshot
+ * mode as it is misleading: it would indicate the number of
+ * packets that the consumer could not extract during the
+ * course of recording the snapshot. It does not have the
+ * same meaning as the "regular" lost packet count that
+ * would result from the consumer not keeping up with
+ * event production in an overwrite-mode channel.
+ *
+ * A more interesting statistic would be the number of
+ * packets lost between the first and last extracted
+ * packets of a given snapshot (which prevents most analyses).
+ */
+ goto skip_stats_printing;
+ }
+
+ if (!channel->attr.overwrite) {
+ MSG("%sdiscarded events: %" PRIu64, indent6, discarded_events);
+ } else {
+ MSG("%slost packets: %" PRIu64, indent6, lost_packets);
+ }
+skip_stats_printing:
+ return;
}
/*
active_string(sessions[i].enabled),
snapshot_string(sessions[i].snapshot_mode));
MSG("%sTrace path: %s\n", indent4, sessions[i].path);
+ memcpy(&listed_session, &sessions[i],
+ sizeof(listed_session));
break;
}
} else {
snapshot_string(sessions[i].snapshot_mode));
MSG("%sTrace path: %s", indent4, sessions[i].path);
if (sessions[i].live_timer_interval != 0) {
- MSG("%sLive timer interval (usec): %u", indent4,
+ MSG("%sLive timer interval: %u µs", indent4,
sessions[i].live_timer_interval);
}
MSG("");
memset(&domain, 0, sizeof(domain));
if (argc < 1) {
- usage(stderr);
ret = CMD_ERROR;
goto end;
}
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stdout);
+ SHOW_HELP();
goto end;
case OPT_USERSPACE:
opt_userspace = 1;
list_cmd_options(stdout, long_options);
goto end;
default:
- usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
projects / lttng-tools.git / blobdiff