function to extract cpu_id
[lttngtop.git] / src / lttngtop.c
CommitLineData
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1/*
2 * Copyright (C) 2011 Julien Desfossez
3 *
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;
7 *
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.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
16 * MA 02111-1307, USA.
17 */
18
19#define _GNU_SOURCE
20#include <config.h>
21#include <stdio.h>
22#include <stdint.h>
23#include <babeltrace/babeltrace.h>
24#include <babeltrace/ctf/events.h>
25#include <babeltrace/ctf/callbacks.h>
26#include <fcntl.h>
27#include <pthread.h>
28#include <popt.h>
29#include <stdlib.h>
30#include <ftw.h>
31#include <dirent.h>
32#include <ctype.h>
33#include <sys/stat.h>
34#include <unistd.h>
35#include <string.h>
36#include <errno.h>
37#include <sys/types.h>
38#include <fts.h>
85db4618 39#include <assert.h>
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40
41#include "lttngtoptypes.h"
42#include "cputop.h"
43#include "iostreamtop.h"
44#include "cursesdisplay.h"
45#include "common.h"
46
47#define DEFAULT_FILE_ARRAY_SIZE 1
48
49const char *opt_input_path;
50
51struct lttngtop *copy;
52pthread_t display_thread;
53pthread_t timer_thread;
54
55unsigned long refresh_display = 1 * NSEC_PER_SEC;
56unsigned long last_display_update = 0;
57int quit = 0;
58
59enum {
60 OPT_NONE = 0,
61 OPT_HELP,
62 OPT_LIST,
63 OPT_VERBOSE,
64 OPT_DEBUG,
65 OPT_NAMES,
66};
67
68static struct poptOption long_options[] = {
69 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
70 { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
71 { NULL, 0, 0, NULL, 0, NULL, NULL },
72};
73
74void *refresh_thread(void *p)
75{
76 while (1) {
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77 if (quit)
78 return NULL;
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79 sem_wait(&pause_sem);
80 sem_post(&pause_sem);
81 sem_post(&timer);
82 sleep(refresh_display/NSEC_PER_SEC);
83 }
84}
85
86void *ncurses_display(void *p)
87{
88 unsigned int current_display_index = 0;
89
90 sem_wait(&bootstrap);
91 init_ncurses();
92
93 while (1) {
94 sem_wait(&timer);
95 sem_wait(&goodtodisplay);
96 sem_wait(&pause_sem);
97
98 copy = g_ptr_array_index(copies, current_display_index);
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99 assert(copy);
100 display(current_display_index++);
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101
102 sem_post(&goodtoupdate);
103 sem_post(&pause_sem);
104
105 if (quit) {
106 reset_ncurses();
107 pthread_exit(0);
108 }
109 }
110}
111
112/*
113 * hook on each event to check the timestamp and refresh the display if
114 * necessary
115 */
116enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
117{
118 unsigned long timestamp;
119
120 timestamp = bt_ctf_get_timestamp(call_data);
121 if (timestamp == -1ULL)
122 goto error;
123
124 if (last_display_update == 0)
125 last_display_update = timestamp;
126
127 if (timestamp - last_display_update >= refresh_display) {
128 sem_wait(&goodtoupdate);
129 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
130 timestamp));
131 sem_post(&goodtodisplay);
132 sem_post(&bootstrap);
133 last_display_update = timestamp;
134 }
135 return BT_CB_OK;
136
137error:
138 fprintf(stderr, "check_timestamp callback error\n");
139 return BT_CB_ERROR_STOP;
140}
141
142/*
143 * get_perf_counter : get or create and return a perf_counter struct for
144 * either a process or a cpu (only one of the 2 parameters mandatory)
145 */
146struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
147 struct cputime *cpu)
148{
149 struct perfcounter *ret, *global;
150 GHashTable *table;
151
152 if (proc)
153 table = proc->perf;
154 else if (cpu)
155 table = cpu->perf;
156 else
157 goto error;
158
159 ret = g_hash_table_lookup(table, (gpointer) name);
160 if (ret)
161 goto end;
162
559c9f86 163 ret = g_new0(struct perfcounter, 1);
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164 /* by default, make it visible in the UI */
165 ret->visible = 1;
85db4618 166 g_hash_table_insert(table, (gpointer) strdup(name), ret);
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167
168 global = g_hash_table_lookup(lttngtop.perf_list, (gpointer) name);
169 if (!global) {
559c9f86 170 global = g_new0(struct perfcounter, 1);
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171 memcpy(global, ret, sizeof(struct perfcounter));
172 /* by default, sort on the first perf context */
173 if (g_hash_table_size(lttngtop.perf_list) == 0)
174 global->sort = 1;
85db4618 175 g_hash_table_insert(lttngtop.perf_list, (gpointer) strdup(name), global);
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176 }
177
178end:
179 return ret;
180
181error:
182 return NULL;
183}
184
185void update_perf_value(struct processtop *proc, struct cputime *cpu,
186 const char *name, int value)
187{
188 struct perfcounter *cpu_perf, *process_perf;
189
190 cpu_perf = get_perf_counter(name, NULL, cpu);
191 if (cpu_perf->count < value) {
192 process_perf = get_perf_counter(name, proc, NULL);
193 process_perf->count += value - cpu_perf->count;
194 cpu_perf->count = value;
195 }
196}
197
198void extract_perf_counter_scope(struct bt_ctf_event *event,
199 struct definition *scope,
200 struct processtop *proc,
201 struct cputime *cpu)
202{
203 struct definition const * const *list = NULL;
204 unsigned int count;
205 int i, ret;
206
207 if (!scope)
208 goto end;
209
210 ret = bt_ctf_get_field_list(event, scope, &list, &count);
211 if (ret < 0)
212 goto end;
213
214 for (i = 0; i < count; i++) {
215 const char *name = bt_ctf_field_name(list[i]);
216 if (strncmp(name, "_perf_", 6) == 0) {
217 int value = bt_ctf_get_uint64(list[i]);
218 if (bt_ctf_field_get_error())
219 continue;
220 update_perf_value(proc, cpu, name, value);
221 }
222 }
223
224end:
225 return;
226}
227
228void update_perf_counter(struct processtop *proc, struct bt_ctf_event *event)
229{
1fc22eb4 230 struct cputime *cpu;
d67167cd 231 struct definition *scope;
1fc22eb4 232
d67167cd 233 cpu = get_cpu(get_cpu_id(event));
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234
235 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
236 extract_perf_counter_scope(event, scope, proc, cpu);
237
238 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
239 extract_perf_counter_scope(event, scope, proc, cpu);
240
241 scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
242 extract_perf_counter_scope(event, scope, proc, cpu);
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243}
244
245enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
246 void *private_data)
247{
248 int pid, tid, ppid;
249 char *comm;
250 struct processtop *parent, *child;
251 struct definition *scope;
252 unsigned long timestamp;
253
85db4618 254 /* FIXME : display nice error when missing context pid, tid, ppid and comm */
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255
256 timestamp = bt_ctf_get_timestamp(call_data);
257 if (timestamp == -1ULL)
258 goto error;
259
260 scope = bt_ctf_get_top_level_scope(call_data, BT_STREAM_EVENT_CONTEXT);
261
262 pid = bt_ctf_get_int64(bt_ctf_get_field(call_data, scope, "_pid"));
263 if (bt_ctf_field_get_error()) {
264// fprintf(stderr, "Missing pid context info\n");
265 goto error;
266 }
267 tid = bt_ctf_get_int64(bt_ctf_get_field(call_data, scope, "_tid"));
268 if (bt_ctf_field_get_error()) {
269// fprintf(stderr, "Missing tid context info\n");
270 goto error;
271 }
272 ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data, scope, "_ppid"));
273 if (bt_ctf_field_get_error()) {
274// fprintf(stderr, "Missing ppid context info\n");
275 goto error;
276 }
277 comm = bt_ctf_get_char_array(bt_ctf_get_field(call_data, scope, "_procname"));
278 if (bt_ctf_field_get_error()) {
279// fprintf(stderr, "Missing procname context info\n");
280 goto error;
281 }
282
283 /* find or create the current process */
284 child = find_process_tid(&lttngtop, tid, comm);
285 if (!child)
286 child = add_proc(&lttngtop, tid, comm, timestamp);
287 update_proc(child, pid, tid, ppid, comm);
288
289 if (pid != tid) {
290 /* find or create the parent */
291 parent = find_process_tid(&lttngtop, pid, comm);
292 if (!parent) {
293 parent = add_proc(&lttngtop, pid, comm, timestamp);
294 parent->pid = pid;
295 }
296
297 /* attach the parent to the current process */
298 child->threadparent = parent;
299 add_thread(parent, child);
300 }
301
302 update_perf_counter(child, call_data);
303
304 return BT_CB_OK;
305
306error:
307 return BT_CB_ERROR_STOP;
308}
309
310void init_lttngtop()
311{
312 copies = g_ptr_array_new();
85db4618 313 lttngtop.perf_list = g_hash_table_new(g_str_hash, g_str_equal);
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314
315 sem_init(&goodtodisplay, 0, 0);
316 sem_init(&goodtoupdate, 0, 1);
317 sem_init(&timer, 0, 1);
318 sem_init(&bootstrap, 0, 0);
319 sem_init(&pause_sem, 0, 1);
320 sem_init(&end_trace_sem, 0, 0);
321
322 lttngtop.process_table = g_ptr_array_new();
323 lttngtop.files_table = g_ptr_array_new();
324 lttngtop.cpu_table = g_ptr_array_new();
325}
326
c263c4eb 327void usage(FILE *fp)
1fc22eb4 328{
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329 fprintf(fp, "LTTngTop %s\n\n", VERSION);
330 fprintf(fp, "Usage : lttngtop /path/to/trace\n");
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331}
332
333/*
334 * Return 0 if caller should continue, < 0 if caller should return
335 * error, > 0 if caller should exit without reporting error.
336 */
337static int parse_options(int argc, char **argv)
338{
339 poptContext pc;
340 int opt, ret = 0;
341
342 if (argc == 1) {
343 usage(stdout);
344 return 1; /* exit cleanly */
345 }
346
347 pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
348 poptReadDefaultConfig(pc, 0);
349
350 while ((opt = poptGetNextOpt(pc)) != -1) {
351 switch (opt) {
352 case OPT_HELP:
353 usage(stdout);
354 ret = 1; /* exit cleanly */
355 goto end;
356 case OPT_LIST:
357 // list_formats(stdout);
358 ret = 1;
359 goto end;
360 case OPT_VERBOSE:
361// babeltrace_verbose = 1;
362 break;
363 case OPT_DEBUG:
364// babeltrace_debug = 1;
365 break;
366 case OPT_NAMES:
367// opt_field_names = 1;
368 break;
369 default:
370 ret = -EINVAL;
371 goto end;
372 }
373 }
374
375 opt_input_path = poptGetArg(pc);
376 if (!opt_input_path) {
377 ret = -EINVAL;
378 goto end;
379 }
380end:
381 if (pc) {
382 poptFreeContext(pc);
383 }
384 return ret;
385}
386
387void iter_trace(struct bt_context *bt_ctx)
388{
389 struct bt_ctf_iter *iter;
390 struct bt_iter_pos begin_pos;
391 struct bt_ctf_event *event;
392 int ret = 0;
393
394 begin_pos.type = BT_SEEK_BEGIN;
395 iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
396
397 /* at each event check if we need to refresh */
398 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
399 check_timestamp,
400 NULL, NULL, NULL);
401 /* at each event, verify the status of the process table */
402 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
403 fix_process_table,
404 NULL, NULL, NULL);
405 /* to handle the scheduling events */
406 bt_ctf_iter_add_callback(iter,
407 g_quark_from_static_string("sched_switch"),
408 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
409 /* to clean up the process table */
410 bt_ctf_iter_add_callback(iter,
411 g_quark_from_static_string("sched_process_free"),
412 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
413
414 /* for IO top */
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);
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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
428 bt_ctf_iter_add_callback(iter,
429 g_quark_from_static_string("sys_close"),
430 NULL, 0, handle_sys_close, NULL, NULL, NULL);
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431 while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
432 ret = bt_iter_next(bt_ctf_get_iter(iter));
433 if (ret < 0)
434 goto end_iter;
435 }
436
437 /* block until quit, we reached the end of the trace */
438 sem_wait(&end_trace_sem);
439
440end_iter:
441 bt_iter_destroy(bt_ctf_get_iter(iter));
442}
443
444/*
445 * bt_context_add_traces_recursive: Open a trace recursively
446 * (copied from BSD code in converter/babeltrace.c)
447 *
448 * Find each trace present in the subdirectory starting from the given
449 * path, and add them to the context. The packet_seek parameter can be
450 * NULL: this specify to use the default format packet_seek.
451 *
452 * Return: 0 on success, nonzero on failure.
453 * Unable to open toplevel: failure.
454 * Unable to open some subdirectory or file: warn and continue;
455 */
456int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
457 const char *format_str,
458 void (*packet_seek)(struct stream_pos *pos,
459 size_t offset, int whence))
460{
461 FTS *tree;
462 FTSENT *node;
463 GArray *trace_ids;
464 char lpath[PATH_MAX];
465 char * const paths[2] = { lpath, NULL };
466 int ret;
467
468 /*
469 * Need to copy path, because fts_open can change it.
470 * It is the pointer array, not the strings, that are constant.
471 */
472 strncpy(lpath, path, PATH_MAX);
473 lpath[PATH_MAX - 1] = '\0';
474
475 tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
476 if (tree == NULL) {
477 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
478 path);
479 return -EINVAL;
480 }
481
482 trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
483
484 while ((node = fts_read(tree))) {
485 int dirfd, metafd;
486
487 if (!(node->fts_info & FTS_D))
488 continue;
489
490 dirfd = open(node->fts_accpath, 0);
491 if (dirfd < 0) {
492 fprintf(stderr, "[error] [Context] Unable to open trace "
493 "directory file descriptor.\n");
494 ret = dirfd;
495 goto error;
496 }
497 metafd = openat(dirfd, "metadata", O_RDONLY);
498 if (metafd < 0) {
499 ret = close(dirfd);
500 if (ret < 0) {
501 perror("close");
502 goto error;
503 }
504 } else {
505 int trace_id;
506
507 ret = close(metafd);
508 if (ret < 0) {
509 perror("close");
510 goto error;
511 }
512 ret = close(dirfd);
513 if (ret < 0) {
514 perror("close");
515 goto error;
516 }
517
518 trace_id = bt_context_add_trace(ctx,
519 node->fts_accpath, format_str,
520 packet_seek, NULL, NULL);
521 if (trace_id < 0) {
522 fprintf(stderr, "[error] [Context] opening trace \"%s\" from %s "
523 "for reading.\n", node->fts_accpath, path);
524 ret = trace_id;
525 goto error;
526 }
527 g_array_append_val(trace_ids, trace_id);
528 }
529 }
530
531 g_array_free(trace_ids, TRUE);
532 return 0;
533
534error:
535 return ret;
536}
537
538int main(int argc, char **argv)
539{
540 int ret;
541 struct bt_context *bt_ctx = NULL;
542
543 ret = parse_options(argc, argv);
544 if (ret < 0) {
545 fprintf(stdout, "Error parsing options.\n\n");
546 usage(stdout);
547 exit(EXIT_FAILURE);
548 } else if (ret > 0) {
549 exit(EXIT_SUCCESS);
550 }
551
552 init_lttngtop();
553
554 bt_ctx = bt_context_create();
555 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
556 if (ret < 0) {
557 printf("[error] Opening the trace\n");
558 goto end;
559 }
560
561 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
562 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
563
564 iter_trace(bt_ctx);
565
566 quit = 1;
567 pthread_join(display_thread, NULL);
85db4618 568 pthread_join(timer_thread, NULL);
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569
570end:
85db4618 571 bt_context_put(bt_ctx);
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572 return 0;
573}
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