2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * main.c: main vector processing loop
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
41 #include <vppinfra/format.h>
42 #include <vlib/vlib.h>
43 #include <vlib/threads.h>
45 #include <vlib/unix/cj.h>
47 CJ_GLOBAL_LOG_PROTOTYPE;
49 /* Actually allocate a few extra slots of vector data to support
50 speculative vector enqueues which overflow vector data in next frame. */
51 #define VLIB_FRAME_SIZE_ALLOC (VLIB_FRAME_SIZE + 4)
54 vlib_frame_bytes (u32 n_scalar_bytes, u32 n_vector_bytes)
58 /* Make room for vlib_frame_t plus scalar arguments. */
59 n_bytes = vlib_frame_vector_byte_offset (n_scalar_bytes);
61 /* Make room for vector arguments.
62 Allocate a few extra slots of vector data to support
63 speculative vector enqueues which overflow vector data in next frame. */
64 #define VLIB_FRAME_SIZE_EXTRA 4
65 n_bytes += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * n_vector_bytes;
67 /* Magic number is first 32bit number after vector data.
68 Used to make sure that vector data is never overrun. */
69 #define VLIB_FRAME_MAGIC (0xabadc0ed)
70 n_bytes += sizeof (u32);
72 /* Pad to cache line. */
73 n_bytes = round_pow2 (n_bytes, CLIB_CACHE_LINE_BYTES);
79 vlib_frame_find_magic (vlib_frame_t * f, vlib_node_t * node)
83 p += vlib_frame_vector_byte_offset (node->scalar_size);
85 p += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * node->vector_size;
90 static vlib_frame_size_t *
91 get_frame_size_info (vlib_node_main_t * nm,
92 u32 n_scalar_bytes, u32 n_vector_bytes)
94 uword key = (n_scalar_bytes << 16) | n_vector_bytes;
97 p = hash_get (nm->frame_size_hash, key);
102 i = vec_len (nm->frame_sizes);
103 vec_validate (nm->frame_sizes, i);
104 hash_set (nm->frame_size_hash, key, i);
107 return vec_elt_at_index (nm->frame_sizes, i);
111 vlib_frame_alloc_to_node (vlib_main_t * vm, u32 to_node_index, u32 frame_flags)
113 vlib_node_main_t * nm = &vm->node_main;
114 vlib_frame_size_t * fs;
115 vlib_node_t * to_node;
117 u32 fi, l, n, scalar_size, vector_size;
119 to_node = vlib_get_node (vm, to_node_index);
121 scalar_size = to_node->scalar_size;
122 vector_size = to_node->vector_size;
124 fs = get_frame_size_info (nm, scalar_size, vector_size);
125 n = vlib_frame_bytes (scalar_size, vector_size);
126 if ((l = vec_len (fs->free_frame_indices)) > 0)
128 /* Allocate from end of free list. */
129 fi = fs->free_frame_indices[l - 1];
130 f = vlib_get_frame_no_check (vm, fi);
131 _vec_len (fs->free_frame_indices) = l - 1;
135 f = clib_mem_alloc_aligned_no_fail (n, VLIB_FRAME_ALIGN);
136 f->cpu_index = vm->cpu_index;
137 fi = vlib_frame_index_no_check (vm, f);
140 /* Poison frame when debugging. */
143 u32 save_cpu_index = f->cpu_index;
147 f->cpu_index = save_cpu_index;
150 /* Insert magic number. */
154 magic = vlib_frame_find_magic (f, to_node);
155 *magic = VLIB_FRAME_MAGIC;
158 f->flags = VLIB_FRAME_IS_ALLOCATED | frame_flags;
160 f->scalar_size = scalar_size;
161 f->vector_size = vector_size;
163 fs->n_alloc_frames += 1;
168 /* Allocate a frame for from FROM_NODE to TO_NODE via TO_NEXT_INDEX.
169 Returns frame index. */
171 vlib_frame_alloc (vlib_main_t * vm, vlib_node_runtime_t * from_node_runtime, u32 to_next_index)
173 vlib_node_t * from_node;
175 from_node = vlib_get_node (vm, from_node_runtime->node_index);
176 ASSERT (to_next_index < vec_len (from_node->next_nodes));
178 return vlib_frame_alloc_to_node (vm,
179 from_node->next_nodes[to_next_index],
180 /* frame_flags */ 0);
184 vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index)
186 u32 fi = vlib_frame_alloc_to_node (vm, to_node_index,
187 /* frame_flags */ VLIB_FRAME_FREE_AFTER_DISPATCH);
188 return vlib_get_frame (vm, fi);
191 void vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index, vlib_frame_t * f)
193 vlib_pending_frame_t * p;
194 vlib_node_t * to_node;
196 if (f->n_vectors == 0)
199 to_node = vlib_get_node (vm, to_node_index);
201 vec_add2 (vm->node_main.pending_frames, p, 1);
203 f->flags |= VLIB_FRAME_PENDING;
204 p->frame_index = vlib_frame_index (vm, f);
205 p->node_runtime_index = to_node->runtime_index;
206 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
209 /* Free given frame. */
211 vlib_frame_free (vlib_main_t * vm,
212 vlib_node_runtime_t * r,
215 vlib_node_main_t * nm = &vm->node_main;
217 vlib_frame_size_t * fs;
220 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
222 node = vlib_get_node (vm, r->node_index);
223 fs = get_frame_size_info (nm, node->scalar_size, node->vector_size);
225 frame_index = vlib_frame_index (vm, f);
227 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
229 /* No next frames may point to freed frame. */
232 vlib_next_frame_t * nf;
233 vec_foreach (nf, vm->node_main.next_frames)
234 ASSERT (nf->frame_index != frame_index);
237 f->flags &= ~VLIB_FRAME_IS_ALLOCATED;
239 vec_add1 (fs->free_frame_indices, frame_index);
240 ASSERT (fs->n_alloc_frames > 0);
241 fs->n_alloc_frames -= 1;
244 static clib_error_t *
245 show_frame_stats (vlib_main_t * vm,
246 unformat_input_t * input,
247 vlib_cli_command_t * cmd)
249 vlib_node_main_t * nm = &vm->node_main;
250 vlib_frame_size_t * fs;
252 vlib_cli_output (vm, "%=6s%=12s%=12s", "Size", "# Alloc", "# Free");
253 vec_foreach (fs, nm->frame_sizes)
255 u32 n_alloc = fs->n_alloc_frames;
256 u32 n_free = vec_len (fs->free_frame_indices);
258 if (n_alloc + n_free > 0)
259 vlib_cli_output (vm, "%=6d%=12d%=12d",
260 fs - nm->frame_sizes, n_alloc, n_free);
266 VLIB_CLI_COMMAND (show_frame_stats_cli, static) = {
267 .path = "show vlib frame-allocation",
268 .short_help = "Show node dispatch frame statistics",
269 .function = show_frame_stats,
272 /* Change ownership of enqueue rights to given next node. */
274 vlib_next_frame_change_ownership (vlib_main_t * vm,
275 vlib_node_runtime_t * node_runtime,
278 vlib_node_main_t * nm = &vm->node_main;
279 vlib_next_frame_t * next_frame;
280 vlib_node_t * node, * next_node;
282 node = vec_elt (nm->nodes, node_runtime->node_index);
284 /* Only internal & input nodes are allowed to call other nodes. */
285 ASSERT (node->type == VLIB_NODE_TYPE_INTERNAL
286 || node->type == VLIB_NODE_TYPE_INPUT
287 || node->type == VLIB_NODE_TYPE_PROCESS);
289 ASSERT (vec_len (node->next_nodes) == node_runtime->n_next_nodes);
291 next_frame = vlib_node_runtime_get_next_frame (vm, node_runtime, next_index);
292 next_node = vec_elt (nm->nodes, node->next_nodes[next_index]);
294 if (next_node->owner_node_index != VLIB_INVALID_NODE_INDEX)
296 /* Get frame from previous owner. */
297 vlib_next_frame_t * owner_next_frame;
298 vlib_next_frame_t tmp;
301 vlib_node_get_next_frame (vm,
302 next_node->owner_node_index,
303 next_node->owner_next_index);
305 /* Swap target next frame with owner's. */
306 tmp = owner_next_frame[0];
307 owner_next_frame[0] = next_frame[0];
311 * If next_frame is already pending, we have to track down
312 * all pending frames and fix their next_frame_index fields.
314 if (next_frame->flags & VLIB_FRAME_PENDING)
316 vlib_pending_frame_t * p;
317 if (next_frame->frame_index != ~0)
319 vec_foreach (p, nm->pending_frames)
321 if (p->frame_index == next_frame->frame_index)
323 p->next_frame_index =
324 next_frame - vm->node_main.next_frames;
332 /* No previous owner. Take ownership. */
333 next_frame->flags |= VLIB_FRAME_OWNER;
336 /* Record new owner. */
337 next_node->owner_node_index = node->index;
338 next_node->owner_next_index = next_index;
340 /* Now we should be owner. */
341 ASSERT (next_frame->flags & VLIB_FRAME_OWNER);
344 /* Make sure that magic number is still there.
345 Otherwise, it is likely that caller has overrun frame arguments. */
347 validate_frame_magic (vlib_main_t * vm,
352 vlib_node_t * next_node = vlib_get_node (vm, n->next_nodes[next_index]);
353 u32 * magic = vlib_frame_find_magic (f, next_node);
354 ASSERT (VLIB_FRAME_MAGIC == magic[0]);
358 vlib_get_next_frame_internal (vlib_main_t * vm,
359 vlib_node_runtime_t * node,
361 u32 allocate_new_next_frame)
364 vlib_next_frame_t * nf;
367 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
369 /* Make sure this next frame owns right to enqueue to destination frame. */
370 if (PREDICT_FALSE (! (nf->flags & VLIB_FRAME_OWNER)))
371 vlib_next_frame_change_ownership (vm, node, next_index);
373 /* ??? Don't need valid flag: can use frame_index == ~0 */
374 if (PREDICT_FALSE (! (nf->flags & VLIB_FRAME_IS_ALLOCATED)))
376 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
377 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
380 f = vlib_get_frame (vm, nf->frame_index);
382 /* Has frame been removed from pending vector (e.g. finished dispatching)?
383 If so we can reuse frame. */
384 if ((nf->flags & VLIB_FRAME_PENDING) && ! (f->flags & VLIB_FRAME_PENDING))
386 nf->flags &= ~VLIB_FRAME_PENDING;
390 /* Allocate new frame if current one is already full. */
391 n_used = f->n_vectors;
392 if (n_used >= VLIB_FRAME_SIZE || (allocate_new_next_frame && n_used > 0))
394 /* Old frame may need to be freed after dispatch, since we'll have
395 two redundant frames from node -> next node. */
396 if (! (nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH))
398 vlib_frame_t * f_old = vlib_get_frame (vm, nf->frame_index);
399 f_old->flags |= VLIB_FRAME_FREE_AFTER_DISPATCH;
402 /* Allocate new frame to replace full one. */
403 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
404 f = vlib_get_frame (vm, nf->frame_index);
405 n_used = f->n_vectors;
408 /* Should have free vectors in frame now. */
409 ASSERT (n_used < VLIB_FRAME_SIZE);
413 validate_frame_magic (vm, f,
414 vlib_get_node (vm, node->node_index),
422 vlib_put_next_frame_validate (vlib_main_t * vm,
423 vlib_node_runtime_t * rt,
427 vlib_node_main_t * nm = &vm->node_main;
428 vlib_next_frame_t * nf;
430 vlib_node_runtime_t * next_rt;
431 vlib_node_t * next_node;
432 u32 n_before, n_after;
434 nf = vlib_node_runtime_get_next_frame (vm, rt, next_index);
435 f = vlib_get_frame (vm, nf->frame_index);
437 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
438 n_after = VLIB_FRAME_SIZE - n_vectors_left;
439 n_before = f->n_vectors;
441 ASSERT (n_after >= n_before);
443 next_rt = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
444 nf->node_runtime_index);
445 next_node = vlib_get_node (vm, next_rt->node_index);
446 if (n_after > 0 && next_node->validate_frame)
448 u8 * msg = next_node->validate_frame (vm, rt, f);
451 clib_warning ("%v", msg);
459 vlib_put_next_frame (vlib_main_t * vm,
460 vlib_node_runtime_t * r,
464 vlib_node_main_t * nm = &vm->node_main;
465 vlib_next_frame_t * nf;
467 u32 n_vectors_in_frame;
469 if (DPDK == 0 && CLIB_DEBUG > 0)
470 vlib_put_next_frame_validate (vm, r, next_index, n_vectors_left);
472 nf = vlib_node_runtime_get_next_frame (vm, r, next_index);
473 f = vlib_get_frame (vm, nf->frame_index);
475 /* Make sure that magic number is still there. Otherwise, caller
476 has overrun frame meta data. */
479 vlib_node_t * node = vlib_get_node (vm, r->node_index);
480 validate_frame_magic (vm, f, node, next_index);
483 /* Convert # of vectors left -> number of vectors there. */
484 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
485 n_vectors_in_frame = VLIB_FRAME_SIZE - n_vectors_left;
487 f->n_vectors = n_vectors_in_frame;
489 /* If vectors were added to frame, add to pending vector. */
490 if (PREDICT_TRUE (n_vectors_in_frame > 0))
492 vlib_pending_frame_t * p;
495 r->cached_next_index = next_index;
497 if (!(f->flags & VLIB_FRAME_PENDING))
499 __attribute__((unused)) vlib_node_t *node;
500 vlib_node_t *next_node;
501 vlib_node_runtime_t *next_runtime;
503 node = vlib_get_node (vm, r->node_index);
504 next_node = vlib_get_next_node (vm, r->node_index, next_index);
505 next_runtime = vlib_node_get_runtime (vm, next_node->index);
507 vec_add2 (nm->pending_frames, p, 1);
509 p->frame_index = nf->frame_index;
510 p->node_runtime_index = nf->node_runtime_index;
511 p->next_frame_index = nf - nm->next_frames;
512 nf->flags |= VLIB_FRAME_PENDING;
513 f->flags |= VLIB_FRAME_PENDING;
516 * If we're going to dispatch this frame on another thread,
517 * force allocation of a new frame. Otherwise, we create
518 * a dangling frame reference. Each thread has its own copy of
519 * the next_frames vector.
521 if (0 && r->cpu_index != next_runtime->cpu_index)
523 nf->frame_index = ~0;
524 nf->flags &= ~(VLIB_FRAME_PENDING | VLIB_FRAME_IS_ALLOCATED);
528 /* Copy trace flag from next_frame and from runtime. */
529 nf->flags |= (nf->flags & VLIB_NODE_FLAG_TRACE) | (r->flags & VLIB_NODE_FLAG_TRACE);
531 v0 = nf->vectors_since_last_overflow;
532 v1 = v0 + n_vectors_in_frame;
533 nf->vectors_since_last_overflow = v1;
534 if (PREDICT_FALSE (v1 < v0))
536 vlib_node_t * node = vlib_get_node (vm, r->node_index);
537 vec_elt (node->n_vectors_by_next_node, next_index) += v0;
542 /* Sync up runtime (32 bit counters) and main node stats (64 bit counters). */
544 vlib_node_runtime_sync_stats (vlib_main_t * vm,
545 vlib_node_runtime_t * r,
550 vlib_node_t * n = vlib_get_node (vm, r->node_index);
552 n->stats_total.calls += n_calls + r->calls_since_last_overflow;
553 n->stats_total.vectors += n_vectors + r->vectors_since_last_overflow;
554 n->stats_total.clocks += n_clocks + r->clocks_since_last_overflow;
555 n->stats_total.max_clock = r->max_clock;
556 n->stats_total.max_clock_n = r->max_clock_n;
558 r->calls_since_last_overflow = 0;
559 r->vectors_since_last_overflow = 0;
560 r->clocks_since_last_overflow = 0;
563 always_inline void __attribute__((unused))
564 vlib_process_sync_stats (vlib_main_t * vm,
570 vlib_node_runtime_t * rt = &p->node_runtime;
571 vlib_node_t * n = vlib_get_node (vm, rt->node_index);
572 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks);
573 n->stats_total.suspends += p->n_suspends;
577 void vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
579 vlib_node_runtime_t * rt;
581 if (n->type == VLIB_NODE_TYPE_PROCESS)
583 /* Nothing to do for PROCESS nodes except in main thread */
584 if (vm != &vlib_global_main) return;
586 vlib_process_t * p = vlib_get_process_from_node (vm, n);
587 n->stats_total.suspends += p->n_suspends;
589 rt = &p->node_runtime;
592 rt = vec_elt_at_index (vm->node_main.nodes_by_type[n->type], n->runtime_index);
594 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0);
596 /* Sync up runtime next frame vector counters with main node structure. */
598 vlib_next_frame_t * nf;
600 for (i = 0; i < rt->n_next_nodes; i++)
602 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
603 vec_elt (n->n_vectors_by_next_node, i) += nf->vectors_since_last_overflow;
604 nf->vectors_since_last_overflow = 0;
610 vlib_node_runtime_update_stats (vlib_main_t * vm,
611 vlib_node_runtime_t * node,
616 u32 ca0, ca1, v0, v1, cl0, cl1, r;
618 cl0 = cl1 = node->clocks_since_last_overflow;
619 ca0 = ca1 = node->calls_since_last_overflow;
620 v0 = v1 = node->vectors_since_last_overflow;
624 cl1 = cl0 + n_clocks;
626 node->calls_since_last_overflow = ca1;
627 node->clocks_since_last_overflow = cl1;
628 node->vectors_since_last_overflow = v1;
629 node->max_clock_n = node->max_clock > n_clocks ?
630 node->max_clock_n : n_vectors;
631 node->max_clock = node->max_clock > n_clocks ?
632 node->max_clock : n_clocks;
634 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
636 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0))
638 node->calls_since_last_overflow = ca0;
639 node->clocks_since_last_overflow = cl0;
640 node->vectors_since_last_overflow = v0;
641 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks);
648 vlib_process_update_stats (vlib_main_t * vm,
654 vlib_node_runtime_update_stats (vm, &p->node_runtime,
655 n_calls, n_vectors, n_clocks);
658 static clib_error_t *
659 vlib_cli_elog_clear (vlib_main_t * vm,
660 unformat_input_t * input,
661 vlib_cli_command_t * cmd)
663 elog_reset_buffer (&vm->elog_main);
667 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
668 .path = "event-logger clear",
669 .short_help = "Clear the event log",
670 .function = vlib_cli_elog_clear,
674 static clib_error_t *
675 elog_save_buffer (vlib_main_t * vm,
676 unformat_input_t * input,
677 vlib_cli_command_t * cmd)
679 elog_main_t * em = &vm->elog_main;
680 char * file, * chroot_file;
681 clib_error_t * error = 0;
683 if (! unformat (input, "%s", &file))
685 vlib_cli_output (vm, "expected file name, got `%U'",
686 format_unformat_error, input);
690 /* It's fairly hard to get "../oopsie" through unformat; just in case */
691 if (strstr(file, "..") || index(file, '/'))
693 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
697 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
701 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
702 elog_n_events_in_buffer (em),
703 elog_buffer_capacity (em),
706 vlib_worker_thread_barrier_sync (vm);
707 error = elog_write_file (em, chroot_file);
708 vlib_worker_thread_barrier_release(vm);
709 vec_free (chroot_file);
713 VLIB_CLI_COMMAND (elog_save_cli, static) = {
714 .path = "event-logger save",
715 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
716 .function = elog_save_buffer,
719 static clib_error_t *
720 elog_stop (vlib_main_t * vm,
721 unformat_input_t * input,
722 vlib_cli_command_t * cmd)
724 elog_main_t * em = &vm->elog_main;
726 em->n_total_events_disable_limit = em->n_total_events;
728 vlib_cli_output (vm, "Stopped the event logger...");
732 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
733 .path = "event-logger stop",
734 .short_help = "Stop the event-logger",
735 .function = elog_stop,
738 static clib_error_t *
739 elog_restart (vlib_main_t * vm,
740 unformat_input_t * input,
741 vlib_cli_command_t * cmd)
743 elog_main_t * em = &vm->elog_main;
745 em->n_total_events_disable_limit = ~0;
747 vlib_cli_output (vm, "Restarted the event logger...");
751 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
752 .path = "event-logger restart",
753 .short_help = "Restart the event-logger",
754 .function = elog_restart,
757 static clib_error_t *
758 elog_resize (vlib_main_t * vm,
759 unformat_input_t * input,
760 vlib_cli_command_t * cmd)
762 elog_main_t * em = &vm->elog_main;
765 /* Stop the parade */
766 elog_reset_buffer (&vm->elog_main);
768 if (unformat (input, "%d", &tmp))
770 elog_alloc (em, tmp);
771 em->n_total_events_disable_limit = ~0;
774 return clib_error_return (0, "Must specify how many events in the ring");
776 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
780 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
781 .path = "event-logger resize",
782 .short_help = "event-logger resize <nnn>",
783 .function = elog_resize,
786 #endif /* CLIB_UNIX */
788 static void elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
790 elog_main_t * em = &vm->elog_main;
791 elog_event_t * e, * es;
794 /* Show events in VLIB time since log clock starts after VLIB clock. */
795 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
796 * vm->clib_time.seconds_per_clock;
798 es = elog_peek_events (em);
799 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
801 em->n_total_events < em->n_total_events_disable_limit ?
802 "running" : "stopped");
805 vlib_cli_output (vm, "%18.9f: %U",
807 format_elog_event, em, e);
809 if (n_events_to_show == 0)
816 static clib_error_t *
817 elog_show_buffer (vlib_main_t * vm,
818 unformat_input_t * input,
819 vlib_cli_command_t * cmd)
821 u32 n_events_to_show;
822 clib_error_t * error = 0;
824 n_events_to_show = 250;
825 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
827 if (unformat (input, "%d", &n_events_to_show))
829 else if (unformat (input, "all"))
830 n_events_to_show = ~0;
832 return unformat_parse_error (input);
834 elog_show_buffer_internal (vm, n_events_to_show);
838 VLIB_CLI_COMMAND (elog_show_cli, static) = {
839 .path = "show event-logger",
840 .short_help = "Show event logger info",
841 .function = elog_show_buffer,
844 void vlib_gdb_show_event_log (void)
846 elog_show_buffer_internal (vlib_get_main(), (u32)~0);
850 vlib_elog_main_loop_event (vlib_main_t * vm,
856 vlib_main_t * evm = &vlib_global_main;
857 elog_main_t * em = &evm->elog_main;
859 if (VLIB_ELOG_MAIN_LOOP && n_vectors)
862 vec_elt_at_index (is_return
863 ? evm->node_return_elog_event_types
864 : evm->node_call_elog_event_types,
867 (vm->cpu_index ? &vlib_worker_threads[vm->cpu_index].elog_track :
869 /* data to log */ n_vectors);
872 void vlib_dump_context_trace (vlib_main_t *vm, u32 bi)
874 vlib_node_main_t * vnm = &vm->node_main;
878 if (VLIB_BUFFER_TRACE_TRAJECTORY)
880 b = vlib_get_buffer (vm, bi);
883 fformat(stderr, "Context trace for bi %d b 0x%llx, visited %d\n",
886 if (n == 0 || n > 20)
888 fformat(stderr, "n is unreasonable\n");
893 for (i = 0; i < n; i++)
897 node_index = b->pre_data[i+1];
899 if (node_index > vec_len (vnm->nodes))
901 fformat(stderr, "Skip bogus node index %d\n", node_index);
905 fformat(stderr, "%v (%d)\n", vnm->nodes[node_index]->name,
912 "in vlib/buffers.h, #define VLIB_BUFFER_TRACE_TRAJECTORY 1\n");
917 /* static_always_inline */ u64
918 dispatch_node (vlib_main_t * vm,
919 vlib_node_runtime_t * node,
920 vlib_node_type_t type,
921 vlib_node_state_t dispatch_state,
922 vlib_frame_t * frame,
927 vlib_node_main_t * nm = &vm->node_main;
928 vlib_next_frame_t * nf;
932 vlib_node_t * n = vlib_get_node (vm, node->node_index);
933 ASSERT (n->type == type);
936 /* Only non-internal nodes may be disabled. */
937 if (type != VLIB_NODE_TYPE_INTERNAL && node->state != dispatch_state)
939 ASSERT (type != VLIB_NODE_TYPE_INTERNAL);
940 return last_time_stamp;
943 if ((type == VLIB_NODE_TYPE_PRE_INPUT || type == VLIB_NODE_TYPE_INPUT)
944 && dispatch_state != VLIB_NODE_STATE_INTERRUPT)
946 u32 c = node->input_main_loops_per_call;
947 /* Only call node when count reaches zero. */
950 node->input_main_loops_per_call = c - 1;
951 return last_time_stamp;
955 /* Speculatively prefetch next frames. */
956 if (node->n_next_nodes > 0)
958 nf = vec_elt_at_index (nm->next_frames, node->next_frame_index);
959 CLIB_PREFETCH (nf, 4 * sizeof (nf[0]), WRITE);
962 vm->cpu_time_last_node_dispatch = last_time_stamp;
964 if (1 /* || vm->cpu_index == node->cpu_index */)
966 vlib_main_t *stat_vm;
968 stat_vm = /* vlib_mains ? vlib_mains[0] : */ vm;
970 vlib_elog_main_loop_event (vm, node->node_index,
972 frame ? frame->n_vectors : 0,
976 * Turn this on if you run into
977 * "bad monkey" contexts, and you want to know exactly
978 * which nodes they've visited... See ixge.c...
980 if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
985 from = vlib_frame_vector_args (frame);
986 for (i = 0; i < frame->n_vectors; i++)
988 vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
989 ASSERT (b->pre_data[0] < 32);
990 log_index = b->pre_data[0]++ + 1;
991 b->pre_data[log_index] = node->node_index;
993 n = node->function (vm, node, frame);
996 n = node->function (vm, node, frame);
998 t = clib_cpu_time_now ();
1000 vlib_elog_main_loop_event (vm, node->node_index, t, n, /* is_after */ 1);
1002 vm->main_loop_vectors_processed += n;
1003 vm->main_loop_nodes_processed += n > 0;
1005 v = vlib_node_runtime_update_stats (stat_vm, node,
1008 /* n_clocks */ t - last_time_stamp);
1010 /* When in interrupt mode and vector rate crosses threshold switch to
1012 if ((DPDK == 0 && dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1013 || (DPDK == 0 && dispatch_state == VLIB_NODE_STATE_POLLING
1015 & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE)))
1017 ELOG_TYPE_DECLARE (e) = {
1018 .function = (char *) __FUNCTION__,
1019 .format = "%s vector length %d, switching to %s",
1020 .format_args = "T4i4t4",
1021 .n_enum_strings = 2,
1023 "interrupt", "polling",
1026 struct { u32 node_name, vector_length, is_polling; } * ed;
1028 if (dispatch_state == VLIB_NODE_STATE_INTERRUPT
1029 && v >= nm->polling_threshold_vector_length)
1031 vlib_node_t * n = vlib_get_node (vm, node->node_index);
1032 n->state = VLIB_NODE_STATE_POLLING;
1033 node->state = VLIB_NODE_STATE_POLLING;
1034 ASSERT (! (node->flags & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE));
1035 node->flags &= ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1036 node->flags |= VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1037 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1038 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1040 ed = ELOG_DATA (&vm->elog_main, e);
1041 ed->node_name = n->name_elog_string;
1042 ed->vector_length = v;
1045 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1046 && v <= nm->interrupt_threshold_vector_length)
1048 vlib_node_t * n = vlib_get_node (vm, node->node_index);
1049 if (node->flags & VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1051 /* Switch to interrupt mode after dispatch in polling one more time.
1052 This allows driver to re-enable interrupts. */
1053 n->state = VLIB_NODE_STATE_INTERRUPT;
1054 node->state = VLIB_NODE_STATE_INTERRUPT;
1055 node->flags &= ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1056 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -= 1;
1057 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] += 1;
1062 node->flags |= VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1063 ed = ELOG_DATA (&vm->elog_main, e);
1064 ed->node_name = n->name_elog_string;
1065 ed->vector_length = v;
1076 dispatch_pending_node (vlib_main_t * vm,
1077 vlib_pending_frame_t * p,
1078 u64 last_time_stamp)
1080 vlib_node_main_t * nm = &vm->node_main;
1082 vlib_next_frame_t * nf, nf_dummy;
1083 vlib_node_runtime_t * n;
1084 u32 restore_frame_index;
1086 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1087 p->node_runtime_index);
1089 f = vlib_get_frame (vm, p->frame_index);
1090 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1092 /* No next frame: so use dummy on stack. */
1094 nf->flags = f->flags & VLIB_NODE_FLAG_TRACE;
1095 nf->frame_index = ~p->frame_index;
1098 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1100 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
1102 /* Force allocation of new frame while current frame is being
1104 restore_frame_index = ~0;
1105 if (nf->frame_index == p->frame_index)
1107 nf->frame_index = ~0;
1108 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1109 if (! (n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1110 restore_frame_index = p->frame_index;
1113 /* Frame must be pending. */
1114 ASSERT (f->flags & VLIB_FRAME_PENDING);
1115 ASSERT (f->n_vectors > 0);
1117 /* Copy trace flag from next frame to node.
1118 Trace flag indicates that at least one vector in the dispatched
1120 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1121 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1122 nf->flags &= ~VLIB_FRAME_TRACE;
1124 last_time_stamp = dispatch_node (vm, n,
1125 VLIB_NODE_TYPE_INTERNAL,
1126 VLIB_NODE_STATE_POLLING,
1127 f, last_time_stamp);
1129 f->flags &= ~VLIB_FRAME_PENDING;
1131 /* Frame is ready to be used again, so restore it. */
1132 if (restore_frame_index != ~0)
1134 /* p->next_frame_index can change during node dispatch if node
1135 function decides to change graph hook up. */
1136 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1137 nf->frame_index = restore_frame_index;
1138 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1141 if (f->flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1143 ASSERT (! (n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1144 vlib_frame_free (vm, n, f);
1147 return last_time_stamp;
1151 vlib_process_stack_is_valid (vlib_process_t * p)
1152 { return p->stack[0] == VLIB_PROCESS_STACK_MAGIC; }
1156 vlib_process_t * process;
1157 vlib_frame_t * frame;
1158 } vlib_process_bootstrap_args_t;
1160 /* Called in process stack. */
1161 static uword vlib_process_bootstrap (uword _a)
1163 vlib_process_bootstrap_args_t * a;
1165 vlib_node_runtime_t * node;
1170 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1175 node = &p->node_runtime;
1177 n = node->function (vm, node, f);
1179 ASSERT (vlib_process_stack_is_valid (p));
1181 clib_longjmp (&p->return_longjmp, n);
1186 /* Called in main stack. */
1187 static_always_inline uword
1188 vlib_process_startup (vlib_main_t * vm,
1192 vlib_process_bootstrap_args_t a;
1199 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1200 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1201 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1202 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1207 static_always_inline uword
1208 vlib_process_resume (vlib_process_t * p)
1211 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1212 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1213 | VLIB_PROCESS_RESUME_PENDING);
1214 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1215 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1216 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1221 dispatch_process (vlib_main_t * vm,
1224 u64 last_time_stamp)
1226 vlib_node_main_t * nm = &vm->node_main;
1227 vlib_node_runtime_t * node_runtime = &p->node_runtime;
1228 vlib_node_t * node = vlib_get_node (vm, node_runtime->node_index);
1230 uword n_vectors, is_suspend;
1232 if (node->state != VLIB_NODE_STATE_POLLING
1233 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1234 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1235 return last_time_stamp;
1237 p->flags |= VLIB_PROCESS_IS_RUNNING;
1239 t = last_time_stamp;
1240 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1241 f ? f->n_vectors : 0, /* is_after */ 0);
1243 /* Save away current process for suspend. */
1244 nm->current_process_index = node->runtime_index;
1246 n_vectors = vlib_process_startup (vm, p, f);
1248 nm->current_process_index = ~0;
1250 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1251 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1254 vlib_pending_frame_t * pf;
1257 pool_get (nm->suspended_process_frames, pf);
1258 pf->node_runtime_index = node->runtime_index;
1259 pf->frame_index = f ? vlib_frame_index (vm, f) : ~0;
1260 pf->next_frame_index = ~0;
1263 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1265 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1266 timing_wheel_insert (&nm->timing_wheel, p->resume_cpu_time,
1267 vlib_timing_wheel_data_set_suspended_process (node->runtime_index));
1270 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1272 t = clib_cpu_time_now ();
1274 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend, /* is_after */ 1);
1276 vlib_process_update_stats (vm, p,
1277 /* n_calls */ ! is_suspend,
1278 /* n_vectors */ n_vectors,
1279 /* n_clocks */ t - last_time_stamp);
1284 void vlib_start_process (vlib_main_t * vm, uword process_index)
1286 vlib_node_main_t * nm = &vm->node_main;
1287 vlib_process_t * p = vec_elt (nm->processes, process_index);
1288 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1292 dispatch_suspended_process (vlib_main_t * vm,
1293 uword process_index,
1294 u64 last_time_stamp)
1296 vlib_node_main_t * nm = &vm->node_main;
1297 vlib_node_runtime_t * node_runtime;
1301 vlib_pending_frame_t * pf;
1302 u64 t, n_vectors, is_suspend;
1304 t = last_time_stamp;
1306 p = vec_elt (nm->processes, process_index);
1307 if (PREDICT_FALSE (! (p->flags & VLIB_PROCESS_IS_RUNNING)))
1308 return last_time_stamp;
1310 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1311 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1313 pf = pool_elt_at_index (nm->suspended_process_frames, p->suspended_process_frame_index);
1315 node_runtime = &p->node_runtime;
1316 node = vlib_get_node (vm, node_runtime->node_index);
1317 f = pf->frame_index != ~0 ? vlib_get_frame (vm, pf->frame_index) : 0;
1319 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, f ? f->n_vectors : 0, /* is_after */ 0);
1321 /* Save away current process for suspend. */
1322 nm->current_process_index = node->runtime_index;
1324 n_vectors = vlib_process_resume (p);
1325 t = clib_cpu_time_now ();
1327 nm->current_process_index = ~0;
1329 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1332 /* Suspend it again. */
1335 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1336 timing_wheel_insert (&nm->timing_wheel, p->resume_cpu_time,
1337 vlib_timing_wheel_data_set_suspended_process (node->runtime_index));
1341 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1342 p->suspended_process_frame_index = ~0;
1343 pool_put (nm->suspended_process_frames, pf);
1346 t = clib_cpu_time_now ();
1347 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, ! is_suspend, /* is_after */ 1);
1349 vlib_process_update_stats (vm, p,
1350 /* n_calls */ ! is_suspend,
1351 /* n_vectors */ n_vectors,
1352 /* n_clocks */ t - last_time_stamp);
1357 static void vlib_main_loop (vlib_main_t * vm)
1359 vlib_node_main_t * nm = &vm->node_main;
1363 /* Initialize pending node vector. */
1364 vec_resize (nm->pending_frames, 32);
1365 _vec_len (nm->pending_frames) = 0;
1367 /* Mark time of main loop start. */
1368 cpu_time_now = vm->clib_time.last_cpu_time;
1369 vm->cpu_time_main_loop_start = cpu_time_now;
1371 /* Arrange for first level of timing wheel to cover times we care
1373 nm->timing_wheel.min_sched_time = 10e-6;
1374 nm->timing_wheel.max_sched_time = 10e-3;
1375 timing_wheel_init (&nm->timing_wheel,
1377 vm->clib_time.clocks_per_second);
1379 /* Pre-allocate expired nodes. */
1380 vec_alloc (nm->data_from_advancing_timing_wheel, 32);
1381 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1383 if (! nm->polling_threshold_vector_length)
1384 nm->polling_threshold_vector_length = 10;
1385 if (! nm->interrupt_threshold_vector_length)
1386 nm->interrupt_threshold_vector_length = 5;
1388 nm->current_process_index = ~0;
1390 /* Start all processes. */
1393 for (i = 0; i < vec_len (nm->processes); i++)
1394 cpu_time_now = dispatch_process (vm, nm->processes[i], /* frame */ 0, cpu_time_now);
1399 vlib_node_runtime_t * n;
1401 /* Process pre-input nodes. */
1402 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1403 cpu_time_now = dispatch_node (vm, n,
1404 VLIB_NODE_TYPE_PRE_INPUT,
1405 VLIB_NODE_STATE_POLLING,
1409 /* Next process input nodes. */
1410 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1411 cpu_time_now = dispatch_node (vm, n,
1412 VLIB_NODE_TYPE_INPUT,
1413 VLIB_NODE_STATE_POLLING,
1417 if (PREDICT_FALSE(vm->queue_signal_pending))
1418 if (vm->queue_signal_callback)
1419 vm->queue_signal_callback (vm);
1421 /* Next handle interrupts. */
1423 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1427 _vec_len (nm->pending_interrupt_node_runtime_indices) = 0;
1428 for (i = 0; i < l; i++)
1430 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1431 nm->pending_interrupt_node_runtime_indices[i]);
1432 cpu_time_now = dispatch_node (vm, n,
1433 VLIB_NODE_TYPE_INPUT,
1434 VLIB_NODE_STATE_INTERRUPT,
1441 /* Check if process nodes have expired from timing wheel. */
1442 nm->data_from_advancing_timing_wheel
1443 = timing_wheel_advance (&nm->timing_wheel, cpu_time_now,
1444 nm->data_from_advancing_timing_wheel,
1445 &nm->cpu_time_next_process_ready);
1447 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1448 if (PREDICT_FALSE (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1452 processes_timing_wheel_data:
1453 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel); i++)
1455 u32 d = nm->data_from_advancing_timing_wheel[i];
1456 u32 di = vlib_timing_wheel_data_get_index (d);
1458 if (vlib_timing_wheel_data_is_timed_event (d))
1460 vlib_signal_timed_event_data_t * te = pool_elt_at_index (nm->signal_timed_event_data_pool, di);
1461 vlib_node_t * n = vlib_get_node (vm, te->process_node_index);
1462 vlib_process_t * p = vec_elt (nm->processes, n->runtime_index);
1464 data = vlib_process_signal_event_helper (nm, n, p, te->event_type_index, te->n_data_elts, te->n_data_elt_bytes);
1465 if (te->n_data_bytes < sizeof (te->inline_event_data))
1466 memcpy (data, te->inline_event_data, te->n_data_bytes);
1469 memcpy (data, te->event_data_as_vector, te->n_data_bytes);
1470 vec_free (te->event_data_as_vector);
1472 pool_put (nm->signal_timed_event_data_pool, te);
1476 cpu_time_now = clib_cpu_time_now();
1477 cpu_time_now = dispatch_suspended_process (vm, di, cpu_time_now);
1482 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1485 /* Input nodes may have added work to the pending vector.
1486 Process pending vector until there is nothing left.
1487 All pending vectors will be processed from input -> output. */
1488 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1489 cpu_time_now = dispatch_pending_node (vm, nm->pending_frames + i,
1491 /* Reset pending vector for next iteration. */
1492 _vec_len (nm->pending_frames) = 0;
1494 /* Pending internal nodes may resume processes. */
1495 if (_vec_len (nm->data_from_advancing_timing_wheel) > 0)
1496 goto processes_timing_wheel_data;
1498 vlib_increment_main_loop_counter (vm);
1500 /* Record time stamp in case there are no enabled nodes and above
1501 calls do not update time stamp. */
1502 cpu_time_now = clib_cpu_time_now ();
1506 vlib_main_t vlib_global_main;
1508 static clib_error_t *
1509 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1511 int turn_on_mem_trace = 0;
1513 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1515 if (unformat (input, "memory-trace"))
1516 turn_on_mem_trace = 1;
1518 else if (unformat (input, "elog-events %d",
1519 &vm->elog_main.event_ring_size))
1522 return unformat_parse_error (input);
1525 unformat_free (input);
1527 /* Enable memory trace as early as possible. */
1528 if (turn_on_mem_trace)
1534 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
1536 /* Main function. */
1537 int vlib_main (vlib_main_t * vm, unformat_input_t * input)
1539 clib_error_t * error;
1541 clib_time_init (&vm->clib_time);
1543 /* Turn on event log. */
1544 if (! vm->elog_main.event_ring_size)
1545 vm->elog_main.event_ring_size = 128 << 10;
1546 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
1547 elog_enable_disable (&vm->elog_main, 1);
1553 vec_validate (vm->buffer_main, 0);
1555 if ((error = vlib_thread_init (vm)))
1557 clib_error_report (error);
1561 /* Register static nodes so that init functions may use them. */
1562 vlib_register_all_static_nodes (vm);
1564 /* Set seed for random number generator.
1565 Allow user to specify seed to make random sequence deterministic. */
1566 if (! unformat (input, "seed %wd", &vm->random_seed))
1567 vm->random_seed = clib_cpu_time_now ();
1568 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
1570 /* See unix/main.c; most likely already set up */
1571 if (vm->init_functions_called == 0)
1572 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
1573 if ((error = vlib_call_all_init_functions (vm)))
1576 /* Initialize node graph. */
1577 if ((error = vlib_node_main_init (vm)))
1579 /* Arrange for graph hook up error to not be fatal when debugging. */
1581 clib_error_report (error);
1586 /* Create default buffer free list. */
1587 vlib_buffer_get_or_create_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
1590 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
1592 case VLIB_MAIN_LOOP_EXIT_NONE:
1593 vm->main_loop_exit_set = 1;
1596 case VLIB_MAIN_LOOP_EXIT_CLI:
1600 error = vm->main_loop_error;
1604 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */)))
1607 /* Call all main loop enter functions. */
1609 clib_error_t * sub_error;
1610 sub_error = vlib_call_all_main_loop_enter_functions (vm);
1612 clib_error_report (sub_error);
1615 vlib_main_loop (vm);
1618 /* Call all exit functions. */
1620 clib_error_t * sub_error;
1621 sub_error = vlib_call_all_main_loop_exit_functions (vm);
1623 clib_error_report (sub_error);
1627 clib_error_report (error);