2 * Copyright (C) 2011-2012 Julien Desfossez
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/ctf/events.h>
24 #include <babeltrace/ctf/callbacks.h>
25 #include <babeltrace/ctf/iterator.h>
37 #include <sys/types.h>
41 #include <lttng/lttng.h>
42 #include <lttng/lttngtop-helper.h>
44 #include "lttngtoptypes.h"
46 #include "iostreamtop.h"
47 #include "cursesdisplay.h"
50 #define DEFAULT_FILE_ARRAY_SIZE 1
52 const char *opt_input_path
;
54 struct lttngtop
*copy
;
55 pthread_t display_thread
;
56 pthread_t timer_thread
;
58 unsigned long refresh_display
= 1 * NSEC_PER_SEC
;
59 unsigned long last_display_update
= 0;
63 /* list of FDs available for being read with snapshots */
64 struct mmap_stream_list mmap_list
;
65 GPtrArray
*lttng_consumer_stream_array
;
66 int sessiond_metadata
, consumerd_metadata
;
67 struct lttng_consumer_local_data
*ctx
= NULL
;
68 /* list of snapshots currently not consumed */
69 GPtrArray
*available_snapshots
;
70 sem_t metadata_available
;
73 int metadata_ready
= 0;
74 void ctf_move_mmap_pos_slow(struct ctf_stream_pos
*pos
, size_t offset
, int whence
);
85 static struct poptOption long_options
[] = {
86 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
87 { "help", 'h', POPT_ARG_NONE
, NULL
, OPT_HELP
, NULL
, NULL
},
88 { NULL
, 0, 0, NULL
, 0, NULL
, NULL
},
91 void *refresh_thread(void *p
)
99 sleep(refresh_display
/NSEC_PER_SEC
);
103 void *ncurses_display(void *p
)
105 unsigned int current_display_index
= 0;
107 sem_wait(&bootstrap
);
109 * Prevent the 1 second delay when we hit ESC
116 sem_wait(&goodtodisplay
);
117 sem_wait(&pause_sem
);
119 copy
= g_ptr_array_index(copies
, current_display_index
);
121 display(current_display_index
++);
123 sem_post(&goodtoupdate
);
124 sem_post(&pause_sem
);
134 * hook on each event to check the timestamp and refresh the display if
137 enum bt_cb_ret
check_timestamp(struct bt_ctf_event
*call_data
, void *private_data
)
139 unsigned long timestamp
;
141 timestamp
= bt_ctf_get_real_timestamp(call_data
);
142 if (timestamp
== -1ULL)
145 if (last_display_update
== 0)
146 last_display_update
= timestamp
;
148 if (timestamp
- last_display_update
>= refresh_display
) {
149 sem_wait(&goodtoupdate
);
150 g_ptr_array_add(copies
, get_copy_lttngtop(last_display_update
,
152 sem_post(&goodtodisplay
);
153 sem_post(&bootstrap
);
154 last_display_update
= timestamp
;
159 fprintf(stderr
, "check_timestamp callback error\n");
160 return BT_CB_ERROR_STOP
;
164 * get_perf_counter : get or create and return a perf_counter struct for
165 * either a process or a cpu (only one of the 2 parameters mandatory)
167 struct perfcounter
*get_perf_counter(const char *name
, struct processtop
*proc
,
170 struct perfcounter
*ret
;
180 ret
= g_hash_table_lookup(table
, (gpointer
) name
);
184 ret
= g_new0(struct perfcounter
, 1);
185 /* by default, make it visible in the UI */
187 g_hash_table_insert(table
, (gpointer
) strdup(name
), ret
);
196 void update_perf_value(struct processtop
*proc
, struct cputime
*cpu
,
197 const char *name
, int value
)
199 struct perfcounter
*cpu_perf
, *process_perf
;
201 cpu_perf
= get_perf_counter(name
, NULL
, cpu
);
202 if (cpu_perf
->count
< value
) {
203 process_perf
= get_perf_counter(name
, proc
, NULL
);
204 process_perf
->count
+= value
- cpu_perf
->count
;
205 cpu_perf
->count
= value
;
209 void extract_perf_counter_scope(const struct bt_ctf_event
*event
,
210 const struct definition
*scope
,
211 struct processtop
*proc
,
214 struct definition
const * const *list
= NULL
;
215 const struct definition
*field
;
217 struct perfcounter
*perfcounter
;
225 ret
= bt_ctf_get_field_list(event
, scope
, &list
, &count
);
232 g_hash_table_iter_init(&iter
, global_perf_liszt
);
233 while (g_hash_table_iter_next (&iter
, &key
, (gpointer
) &perfcounter
)) {
234 field
= bt_ctf_get_field(event
, scope
, (char *) key
);
236 int value
= bt_ctf_get_uint64(field
);
237 if (bt_ctf_field_get_error())
239 update_perf_value(proc
, cpu
, (char *) key
, value
);
247 void update_perf_counter(struct processtop
*proc
, const struct bt_ctf_event
*event
)
250 const struct definition
*scope
;
252 cpu
= get_cpu(get_cpu_id(event
));
254 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_EVENT_CONTEXT
);
255 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
257 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_PACKET_CONTEXT
);
258 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
260 scope
= bt_ctf_get_top_level_scope(event
, BT_EVENT_CONTEXT
);
261 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
264 enum bt_cb_ret
fix_process_table(struct bt_ctf_event
*call_data
,
269 struct processtop
*parent
, *child
;
270 unsigned long timestamp
;
272 timestamp
= bt_ctf_get_real_timestamp(call_data
);
273 if (timestamp
== -1ULL)
276 pid
= get_context_pid(call_data
);
280 tid
= get_context_tid(call_data
);
284 ppid
= get_context_ppid(call_data
);
288 comm
= get_context_comm(call_data
);
293 /* find or create the current process */
294 child
= find_process_tid(<tngtop
, tid
, comm
);
296 child
= add_proc(<tngtop
, tid
, comm
, timestamp
);
297 update_proc(child
, pid
, tid
, ppid
, comm
);
300 /* find or create the parent */
301 parent
= find_process_tid(<tngtop
, pid
, comm
);
303 parent
= add_proc(<tngtop
, pid
, comm
, timestamp
);
307 /* attach the parent to the current process */
308 child
->threadparent
= parent
;
309 add_thread(parent
, child
);
312 update_perf_counter(child
, call_data
);
317 return BT_CB_ERROR_STOP
;
322 copies
= g_ptr_array_new();
323 global_perf_liszt
= g_hash_table_new(g_str_hash
, g_str_equal
);
325 sem_init(&goodtodisplay
, 0, 0);
326 sem_init(&goodtoupdate
, 0, 1);
327 sem_init(&timer
, 0, 1);
328 sem_init(&bootstrap
, 0, 0);
329 sem_init(&pause_sem
, 0, 1);
330 sem_init(&end_trace_sem
, 0, 0);
332 reset_global_counters();
334 lttngtop
.nbthreads
= 0;
335 lttngtop
.nbfiles
= 0;
337 lttngtop
.process_table
= g_ptr_array_new();
338 lttngtop
.files_table
= g_ptr_array_new();
339 lttngtop
.cpu_table
= g_ptr_array_new();
344 fprintf(fp
, "LTTngTop %s\n\n", VERSION
);
345 fprintf(fp
, "Usage : lttngtop /path/to/trace\n");
349 * Return 0 if caller should continue, < 0 if caller should return
350 * error, > 0 if caller should exit without reporting error.
352 static int parse_options(int argc
, char **argv
)
357 pc
= poptGetContext(NULL
, argc
, (const char **) argv
, long_options
, 0);
358 poptReadDefaultConfig(pc
, 0);
360 while ((opt
= poptGetNextOpt(pc
)) != -1) {
364 ret
= 1; /* exit cleanly */
372 opt_input_path
= poptGetArg(pc
);
381 void iter_trace(struct bt_context
*bt_ctx
)
383 struct bt_ctf_iter
*iter
;
384 struct bt_iter_pos begin_pos
;
385 const struct bt_ctf_event
*event
;
388 begin_pos
.type
= BT_SEEK_BEGIN
;
389 iter
= bt_ctf_iter_create(bt_ctx
, &begin_pos
, NULL
);
391 /* at each event check if we need to refresh */
392 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
395 /* at each event, verify the status of the process table */
396 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
399 /* to handle the scheduling events */
400 bt_ctf_iter_add_callback(iter
,
401 g_quark_from_static_string("sched_switch"),
402 NULL
, 0, handle_sched_switch
, NULL
, NULL
, NULL
);
403 /* to clean up the process table */
404 bt_ctf_iter_add_callback(iter
,
405 g_quark_from_static_string("sched_process_free"),
406 NULL
, 0, handle_sched_process_free
, NULL
, NULL
, NULL
);
407 /* to get all the process from the statedumps */
408 bt_ctf_iter_add_callback(iter
,
409 g_quark_from_static_string(
410 "lttng_statedump_process_state"),
411 NULL
, 0, handle_statedump_process_state
,
415 bt_ctf_iter_add_callback(iter
,
416 g_quark_from_static_string("exit_syscall"),
417 NULL
, 0, handle_exit_syscall
, NULL
, NULL
, NULL
);
418 bt_ctf_iter_add_callback(iter
,
419 g_quark_from_static_string("sys_write"),
420 NULL
, 0, handle_sys_write
, NULL
, NULL
, NULL
);
421 bt_ctf_iter_add_callback(iter
,
422 g_quark_from_static_string("sys_read"),
423 NULL
, 0, handle_sys_read
, NULL
, NULL
, NULL
);
424 bt_ctf_iter_add_callback(iter
,
425 g_quark_from_static_string("sys_open"),
426 NULL
, 0, handle_sys_open
, NULL
, NULL
, NULL
);
427 bt_ctf_iter_add_callback(iter
,
428 g_quark_from_static_string("sys_close"),
429 NULL
, 0, handle_sys_close
, NULL
, NULL
, NULL
);
430 bt_ctf_iter_add_callback(iter
,
431 g_quark_from_static_string(
432 "lttng_statedump_file_descriptor"),
433 NULL
, 0, handle_statedump_file_descriptor
,
436 while ((event
= bt_ctf_iter_read_event(iter
)) != NULL
) {
437 ret
= bt_iter_next(bt_ctf_get_iter(iter
));
442 /* block until quit, we reached the end of the trace */
443 sem_wait(&end_trace_sem
);
446 bt_ctf_iter_destroy(iter
);
450 * bt_context_add_traces_recursive: Open a trace recursively
451 * (copied from BSD code in converter/babeltrace.c)
453 * Find each trace present in the subdirectory starting from the given
454 * path, and add them to the context. The packet_seek parameter can be
455 * NULL: this specify to use the default format packet_seek.
457 * Return: 0 on success, nonzero on failure.
458 * Unable to open toplevel: failure.
459 * Unable to open some subdirectory or file: warn and continue;
461 int bt_context_add_traces_recursive(struct bt_context
*ctx
, const char *path
,
462 const char *format_str
,
463 void (*packet_seek
)(struct stream_pos
*pos
,
464 size_t offset
, int whence
))
469 char lpath
[PATH_MAX
];
470 char * const paths
[2] = { lpath
, NULL
};
474 * Need to copy path, because fts_open can change it.
475 * It is the pointer array, not the strings, that are constant.
477 strncpy(lpath
, path
, PATH_MAX
);
478 lpath
[PATH_MAX
- 1] = '\0';
480 tree
= fts_open(paths
, FTS_NOCHDIR
| FTS_LOGICAL
, 0);
482 fprintf(stderr
, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
487 trace_ids
= g_array_new(FALSE
, TRUE
, sizeof(int));
489 while ((node
= fts_read(tree
))) {
492 if (!(node
->fts_info
& FTS_D
))
495 dirfd
= open(node
->fts_accpath
, 0);
497 fprintf(stderr
, "[error] [Context] Unable to open trace "
498 "directory file descriptor.\n");
502 metafd
= openat(dirfd
, "metadata", O_RDONLY
);
521 trace_id
= bt_context_add_trace(ctx
,
522 node
->fts_accpath
, format_str
,
523 packet_seek
, NULL
, NULL
);
525 fprintf(stderr
, "[warning] [Context] opening trace \"%s\" from %s "
526 "for reading.\n", node
->fts_accpath
, path
);
527 /* Allow to skip erroneous traces. */
530 g_array_append_val(trace_ids
, trace_id
);
534 g_array_free(trace_ids
, TRUE
);
541 static int check_field_requirements(const struct bt_ctf_field_decl
*const * field_list
,
542 int field_cnt
, int *tid_check
, int *pid_check
,
543 int *procname_check
, int *ppid_check
)
546 struct perfcounter
*global
;
549 for (j
= 0; j
< field_cnt
; j
++) {
550 name
= bt_ctf_get_decl_field_name(field_list
[j
]);
551 if (*tid_check
== 0) {
552 if (strncmp(name
, "tid", 3) == 0)
555 if (*pid_check
== 0) {
556 if (strncmp(name
, "tid", 3) == 0)
559 if (*ppid_check
== 0) {
560 if (strncmp(name
, "ppid", 4) == 0)
563 if (*procname_check
== 0) {
564 if (strncmp(name
, "procname", 8) == 0)
567 if (strncmp(name
, "perf_", 5) == 0) {
568 global
= g_hash_table_lookup(global_perf_liszt
, (gpointer
) name
);
570 global
= g_new0(struct perfcounter
, 1);
571 /* by default, sort on the first perf context */
572 if (g_hash_table_size(global_perf_liszt
) == 0)
575 g_hash_table_insert(global_perf_liszt
, (gpointer
) strdup(name
), global
);
580 if (*tid_check
== 1 && *pid_check
== 1 && *ppid_check
== 1 &&
581 *procname_check
== 1)
588 * check_requirements: check if the required context informations are available
590 * If each mandatory context information is available for at least in one
591 * event, return 0 otherwise return -1.
593 int check_requirements(struct bt_context
*ctx
)
595 unsigned int i
, evt_cnt
, field_cnt
;
596 struct bt_ctf_event_decl
*const * evt_list
;
597 const struct bt_ctf_field_decl
*const * field_list
;
600 int procname_check
= 0;
604 bt_ctf_get_event_decl_list(0, ctx
, &evt_list
, &evt_cnt
);
605 for (i
= 0; i
< evt_cnt
; i
++) {
606 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_EVENT_CONTEXT
,
607 &field_list
, &field_cnt
);
608 ret
= check_field_requirements(field_list
, field_cnt
,
609 &tid_check
, &pid_check
, &procname_check
,
612 bt_ctf_get_decl_fields(evt_list
[i
], BT_EVENT_CONTEXT
,
613 &field_list
, &field_cnt
);
614 ret
= check_field_requirements(field_list
, field_cnt
,
615 &tid_check
, &pid_check
, &procname_check
,
618 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_PACKET_CONTEXT
,
619 &field_list
, &field_cnt
);
620 ret
= check_field_requirements(field_list
, field_cnt
,
621 &tid_check
, &pid_check
, &procname_check
,
625 if (tid_check
== 0) {
627 fprintf(stderr
, "[error] missing tid context information\n");
629 if (pid_check
== 0) {
631 fprintf(stderr
, "[error] missing pid context information\n");
633 if (ppid_check
== 0) {
635 fprintf(stderr
, "[error] missing ppid context information\n");
637 if (procname_check
== 0) {
639 fprintf(stderr
, "[error] missing procname context information\n");
647 struct lttng_consumer_stream
*iter
;
649 struct mmap_stream
*new_snapshot
;
654 * try lock mutex ressource courante (overrun)
656 * stop trace (flush implicite avant stop)
657 * lttng_consumer_take_snapshot
658 * read timestamp packet end (use time as end pos)
659 * - stream_packet_context
660 * - reculer de 1 subbuf : pos - max_subbuff_size
662 * - position de fin (take_snapshot)
663 * - mov_pos_slow ( fin - max_subbuff_size) lire timestamp packet end
664 * - prend min(end) (activité sur tous les streams)
670 helper_kernctl_buffer_flush(consumerd_metadata
);
671 for (i
= 0; i
< lttng_consumer_stream_array
->len
; i
++) {
672 iter
= g_ptr_array_index(lttng_consumer_stream_array
, i
);
673 helper_kernctl_buffer_flush(helper_get_lttng_consumer_stream_wait_fd(iter
));
674 printf("Taking snapshot of fd : %d\n", helper_get_lttng_consumer_stream_wait_fd(iter
));
675 ret
= helper_lttng_consumer_take_snapshot(ctx
, iter
);
678 perror("lttng_consumer_take_snapshots");
682 for (i
= 0; i
< lttng_consumer_stream_array
->len
; i
++) {
683 iter
= g_ptr_array_index(lttng_consumer_stream_array
, i
);
684 ret
= helper_lttng_consumer_get_produced_snapshot(ctx
, iter
, &spos
);
687 perror("helper_lttng_consumer_get_produced_snapshot");
690 while (helper_get_lttng_consumer_stream_wait_last_pos(iter
) < spos
) {
691 new_snapshot
= g_new0(struct mmap_stream
, 1);
692 new_snapshot
->fd
= helper_get_lttng_consumer_stream_wait_fd(iter
);
693 new_snapshot
->last_pos
= helper_get_lttng_consumer_stream_wait_last_pos(iter
);
694 fprintf(stderr
,"ADDING AVAILABLE SNAPSHOT ON FD %d AT POSITION %lu\n",
696 new_snapshot
->last_pos
);
697 g_ptr_array_add(available_snapshots
, new_snapshot
);
698 helper_set_lttng_consumer_stream_wait_last_pos(iter
,
699 helper_get_lttng_consumer_stream_wait_last_pos(iter
) +
700 helper_get_lttng_consumer_stream_chan_max_sb_size(iter
));
704 if (!metadata_ready
) {
705 fprintf(stderr
, "BLOCKING BEFORE METADATA\n");
706 sem_wait(&metadata_available
);
707 fprintf(stderr
,"OPENING TRACE\n");
708 if (access("/tmp/livesession/kernel/metadata", F_OK
) != 0) {
709 fprintf(stderr
,"NO METADATA FILE, SKIPPING\n");
713 metadata_fp
= fopen("/tmp/livesession/kernel/metadata", "r");
721 ssize_t
read_subbuffer(struct lttng_consumer_stream
*kconsumerd_fd
,
722 struct lttng_consumer_local_data
*ctx
)
727 int infd
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
729 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_SPLICE
) {
730 /* Get the next subbuffer */
731 printf("get_next : %d\n", infd
);
732 err
= helper_kernctl_get_next_subbuf(infd
);
735 perror("Reserving sub buffer failed (everything is normal, "
736 "it is due to concurrency)");
739 /* read the whole subbuffer */
740 err
= helper_kernctl_get_padded_subbuf_size(infd
, &len
);
743 perror("Getting sub-buffer len failed.");
746 printf("len : %ld\n", len
);
748 /* splice the subbuffer to the tracefile */
749 ret
= helper_lttng_consumer_on_read_subbuffer_splice(ctx
, kconsumerd_fd
, len
);
752 * display the error but continue processing to try
753 * to release the subbuffer
755 fprintf(stderr
,"Error splicing to tracefile\n");
757 printf("ret : %ld\n", ret
);
758 printf("put_next : %d\n", infd
);
759 err
= helper_kernctl_put_next_subbuf(infd
);
762 perror("Reserving sub buffer failed (everything is normal, "
763 "it is due to concurrency)");
766 sem_post(&metadata_available
);
773 int on_update_fd(int key
, uint32_t state
)
775 /* let the lib handle the metadata FD */
776 if (key
== sessiond_metadata
)
781 int on_recv_fd(struct lttng_consumer_stream
*kconsumerd_fd
)
784 struct mmap_stream
*new_info
;
787 /* Opening the tracefile in write mode */
788 if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
) != NULL
) {
789 ret
= open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
),
790 O_WRONLY
|O_CREAT
|O_TRUNC
, S_IRWXU
|S_IRWXG
|S_IRWXO
);
795 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd
, ret
);
798 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_MMAP
) {
799 new_info
= malloc(sizeof(struct mmap_stream
));
800 new_info
->fd
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
801 bt_list_add(&new_info
->list
, &mmap_list
.head
);
803 /* get the len of the mmap region */
804 ret
= helper_kernctl_get_mmap_len(helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
),
808 perror("helper_kernctl_get_mmap_len");
811 helper_set_lttng_consumer_stream_mmap_len(kconsumerd_fd
, tmp_mmap_len
);
813 helper_set_lttng_consumer_stream_mmap_base(kconsumerd_fd
,
814 mmap(NULL
, helper_get_lttng_consumer_stream_mmap_len(kconsumerd_fd
),
815 PROT_READ
, MAP_PRIVATE
, helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
), 0));
816 if (helper_get_lttng_consumer_stream_mmap_base(kconsumerd_fd
) == MAP_FAILED
) {
817 perror("Error mmaping");
822 g_ptr_array_add(lttng_consumer_stream_array
, kconsumerd_fd
);
825 consumerd_metadata
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
826 sessiond_metadata
= helper_get_lttng_consumer_stream_key(kconsumerd_fd
);
836 struct bt_context
*bt_ctx
= NULL
;
843 bt_ctx = bt_context_create();
844 ret = bt_context_add_trace(ctx, NULL, "ctf",
845 ctf_move_mmap_pos_slow, mmap_list, metadata_fp);
849 //iter_trace(bt_ctx);
854 int setup_consumer(char *command_sock_path
, pthread_t
*threads
,
855 struct lttng_consumer_local_data
*ctx
)
859 ctx
= helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL
,
860 read_subbuffer
, NULL
, on_recv_fd
, on_update_fd
);
864 unlink(command_sock_path
);
865 helper_lttng_consumer_set_command_sock_path(ctx
, command_sock_path
);
866 helper_lttng_consumer_init();
868 /* Create the thread to manage the receive of fd */
869 ret
= pthread_create(&threads
[0], NULL
, helper_lttng_consumer_thread_receive_fds
,
872 perror("pthread_create");
875 /* Create thread to manage the polling/writing of traces */
876 ret
= pthread_create(&threads
[1], NULL
, helper_lttng_consumer_thread_poll_fds
,
879 perror("pthread_create");
883 /* Create thread to manage the polling/writing of traces */
884 ret
= pthread_create(&threads
[1], NULL
, helper_lttng_consumer_thread_poll_fds
,
887 perror("pthread_create");
895 int setup_live_tracing()
897 struct lttng_domain dom
;
898 struct lttng_channel chan
;
899 char *channel_name
= "mmapchan";
900 struct lttng_event ev
;
902 char *command_sock_path
= "/tmp/consumerd_sock";
903 static pthread_t threads
[2]; /* recv_fd, poll */
904 struct lttng_event_context kctxpid
, kctxcomm
, kctxppid
, kctxtid
;
906 struct lttng_handle
*handle
;
907 pthread_t live_trace_thread
;
909 BT_INIT_LIST_HEAD(&mmap_list
.head
);
911 lttng_consumer_stream_array
= g_ptr_array_new();
913 if ((ret
= setup_consumer(command_sock_path
, threads
, ctx
)) < 0) {
914 fprintf(stderr
,"error setting up consumer\n");
918 available_snapshots
= g_ptr_array_new();
920 /* setup the session */
921 dom
.type
= LTTNG_DOMAIN_KERNEL
;
923 ret
= system("rm -rf /tmp/livesession");
925 if ((ret
= lttng_create_session("test", "/tmp/livesession")) < 0) {
926 fprintf(stderr
,"error creating the session : %s\n",
927 helper_lttcomm_get_readable_code(ret
));
931 if ((handle
= lttng_create_handle("test", &dom
)) == NULL
) {
932 fprintf(stderr
,"error creating handle\n");
936 if ((ret
= lttng_register_consumer(handle
, command_sock_path
)) < 0) {
937 fprintf(stderr
,"error registering consumer : %s\n",
938 helper_lttcomm_get_readable_code(ret
));
942 strcpy(chan
.name
, channel_name
);
943 chan
.attr
.overwrite
= 1;
944 // chan.attr.subbuf_size = 32768;
945 chan
.attr
.subbuf_size
= 1048576; /* 1MB */
946 chan
.attr
.num_subbuf
= 4;
947 chan
.attr
.switch_timer_interval
= 0;
948 chan
.attr
.read_timer_interval
= 200;
949 chan
.attr
.output
= LTTNG_EVENT_MMAP
;
951 if ((ret
= lttng_enable_channel(handle
, &chan
)) < 0) {
952 fprintf(stderr
,"error creating channel : %s\n", helper_lttcomm_get_readable_code(ret
));
956 sprintf(ev
.name
, "sched_switch");
957 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
959 //if ((ret = lttng_enable_event(handle, NULL, channel_name)) < 0) {
960 if ((ret
= lttng_enable_event(handle
, &ev
, channel_name
)) < 0) {
961 fprintf(stderr
,"error enabling event : %s\n", helper_lttcomm_get_readable_code(ret
));
965 kctxpid
.ctx
= LTTNG_EVENT_CONTEXT_PID
;
966 lttng_add_context(handle
, &kctxpid
, NULL
, NULL
);
967 kctxppid
.ctx
= LTTNG_EVENT_CONTEXT_PPID
;
968 lttng_add_context(handle
, &kctxppid
, NULL
, NULL
);
969 kctxcomm
.ctx
= LTTNG_EVENT_CONTEXT_PROCNAME
;
970 lttng_add_context(handle
, &kctxcomm
, NULL
, NULL
);
971 kctxtid
.ctx
= LTTNG_EVENT_CONTEXT_TID
;
972 lttng_add_context(handle
, &kctxtid
, NULL
, NULL
);
974 if ((ret
= lttng_start_tracing("test")) < 0) {
975 fprintf(stderr
,"error starting tracing : %s\n", helper_lttcomm_get_readable_code(ret
));
979 helper_kernctl_buffer_flush(consumerd_metadata
);
981 /* Create thread to manage the polling/writing of traces */
982 ret
= pthread_create(&live_trace_thread
, NULL
, live_consume
, NULL
);
984 perror("pthread_create");
989 pthread_cancel(live_trace_thread
);
991 lttng_stop_tracing("test");
992 lttng_destroy_session("test");
994 /* block until metadata is ready */
995 sem_init(&metadata_available
, 0, 0);
1003 int main(int argc
, char **argv
)
1006 struct bt_context
*bt_ctx
= NULL
;
1008 ret
= parse_options(argc
, argv
);
1010 fprintf(stdout
, "Error parsing options.\n\n");
1013 } else if (ret
> 0) {
1017 if (!opt_input_path
) {
1018 printf("live tracing enabled\n");
1019 setup_live_tracing();
1024 bt_ctx
= bt_context_create();
1025 ret
= bt_context_add_traces_recursive(bt_ctx
, opt_input_path
, "ctf", NULL
);
1027 fprintf(stderr
, "[error] Opening the trace\n");
1031 ret
= check_requirements(bt_ctx
);
1033 fprintf(stderr
, "[error] some mandatory contexts were missing, exiting.\n");
1036 pthread_create(&display_thread
, NULL
, ncurses_display
, (void *) NULL
);
1037 pthread_create(&timer_thread
, NULL
, refresh_thread
, (void *) NULL
);
1042 pthread_join(display_thread
, NULL
);
1043 pthread_join(timer_thread
, NULL
);
1048 bt_context_put(bt_ctx
);