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,
114 vlib_node_main_t *nm = &vm->node_main;
115 vlib_frame_size_t *fs;
116 vlib_node_t *to_node;
118 u32 fi, l, n, scalar_size, vector_size;
120 to_node = vlib_get_node (vm, to_node_index);
122 scalar_size = to_node->scalar_size;
123 vector_size = to_node->vector_size;
125 fs = get_frame_size_info (nm, scalar_size, vector_size);
126 n = vlib_frame_bytes (scalar_size, vector_size);
127 if ((l = vec_len (fs->free_frame_indices)) > 0)
129 /* Allocate from end of free list. */
130 fi = fs->free_frame_indices[l - 1];
131 f = vlib_get_frame_no_check (vm, fi);
132 _vec_len (fs->free_frame_indices) = l - 1;
136 f = clib_mem_alloc_aligned_no_fail (n, VLIB_FRAME_ALIGN);
137 f->cpu_index = vm->cpu_index;
138 fi = vlib_frame_index_no_check (vm, f);
141 /* Poison frame when debugging. */
144 u32 save_cpu_index = f->cpu_index;
148 f->cpu_index = save_cpu_index;
151 /* Insert magic number. */
155 magic = vlib_frame_find_magic (f, to_node);
156 *magic = VLIB_FRAME_MAGIC;
159 f->flags = VLIB_FRAME_IS_ALLOCATED | frame_flags;
161 f->scalar_size = scalar_size;
162 f->vector_size = vector_size;
164 fs->n_alloc_frames += 1;
169 /* Allocate a frame for from FROM_NODE to TO_NODE via TO_NEXT_INDEX.
170 Returns frame index. */
172 vlib_frame_alloc (vlib_main_t * vm, vlib_node_runtime_t * from_node_runtime,
175 vlib_node_t *from_node;
177 from_node = vlib_get_node (vm, from_node_runtime->node_index);
178 ASSERT (to_next_index < vec_len (from_node->next_nodes));
180 return vlib_frame_alloc_to_node (vm, from_node->next_nodes[to_next_index],
181 /* frame_flags */ 0);
185 vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index)
187 u32 fi = vlib_frame_alloc_to_node (vm, to_node_index,
189 VLIB_FRAME_FREE_AFTER_DISPATCH);
190 return vlib_get_frame (vm, fi);
194 vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index, vlib_frame_t * f)
196 vlib_pending_frame_t *p;
197 vlib_node_t *to_node;
199 if (f->n_vectors == 0)
202 to_node = vlib_get_node (vm, to_node_index);
204 vec_add2 (vm->node_main.pending_frames, p, 1);
206 f->flags |= VLIB_FRAME_PENDING;
207 p->frame_index = vlib_frame_index (vm, f);
208 p->node_runtime_index = to_node->runtime_index;
209 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
212 /* Free given frame. */
214 vlib_frame_free (vlib_main_t * vm, vlib_node_runtime_t * r, vlib_frame_t * f)
216 vlib_node_main_t *nm = &vm->node_main;
218 vlib_frame_size_t *fs;
221 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
223 node = vlib_get_node (vm, r->node_index);
224 fs = get_frame_size_info (nm, node->scalar_size, node->vector_size);
226 frame_index = vlib_frame_index (vm, f);
228 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
230 /* No next frames may point to freed frame. */
233 vlib_next_frame_t *nf;
234 vec_foreach (nf, vm->node_main.next_frames)
235 ASSERT (nf->frame_index != frame_index);
238 f->flags &= ~VLIB_FRAME_IS_ALLOCATED;
240 vec_add1 (fs->free_frame_indices, frame_index);
241 ASSERT (fs->n_alloc_frames > 0);
242 fs->n_alloc_frames -= 1;
245 static clib_error_t *
246 show_frame_stats (vlib_main_t * vm,
247 unformat_input_t * input, 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);
267 VLIB_CLI_COMMAND (show_frame_stats_cli, static) = {
268 .path = "show vlib frame-allocation",
269 .short_help = "Show node dispatch frame statistics",
270 .function = show_frame_stats,
274 /* Change ownership of enqueue rights to given next node. */
276 vlib_next_frame_change_ownership (vlib_main_t * vm,
277 vlib_node_runtime_t * node_runtime,
280 vlib_node_main_t *nm = &vm->node_main;
281 vlib_next_frame_t *next_frame;
282 vlib_node_t *node, *next_node;
284 node = vec_elt (nm->nodes, node_runtime->node_index);
286 /* Only internal & input nodes are allowed to call other nodes. */
287 ASSERT (node->type == VLIB_NODE_TYPE_INTERNAL
288 || node->type == VLIB_NODE_TYPE_INPUT
289 || node->type == VLIB_NODE_TYPE_PROCESS);
291 ASSERT (vec_len (node->next_nodes) == node_runtime->n_next_nodes);
294 vlib_node_runtime_get_next_frame (vm, node_runtime, next_index);
295 next_node = vec_elt (nm->nodes, node->next_nodes[next_index]);
297 if (next_node->owner_node_index != VLIB_INVALID_NODE_INDEX)
299 /* Get frame from previous owner. */
300 vlib_next_frame_t *owner_next_frame;
301 vlib_next_frame_t tmp;
304 vlib_node_get_next_frame (vm,
305 next_node->owner_node_index,
306 next_node->owner_next_index);
308 /* Swap target next frame with owner's. */
309 tmp = owner_next_frame[0];
310 owner_next_frame[0] = next_frame[0];
314 * If next_frame is already pending, we have to track down
315 * all pending frames and fix their next_frame_index fields.
317 if (next_frame->flags & VLIB_FRAME_PENDING)
319 vlib_pending_frame_t *p;
320 if (next_frame->frame_index != ~0)
322 vec_foreach (p, nm->pending_frames)
324 if (p->frame_index == next_frame->frame_index)
326 p->next_frame_index =
327 next_frame - vm->node_main.next_frames;
335 /* No previous owner. Take ownership. */
336 next_frame->flags |= VLIB_FRAME_OWNER;
339 /* Record new owner. */
340 next_node->owner_node_index = node->index;
341 next_node->owner_next_index = next_index;
343 /* Now we should be owner. */
344 ASSERT (next_frame->flags & VLIB_FRAME_OWNER);
347 /* Make sure that magic number is still there.
348 Otherwise, it is likely that caller has overrun frame arguments. */
350 validate_frame_magic (vlib_main_t * vm,
351 vlib_frame_t * f, vlib_node_t * n, uword next_index)
353 vlib_node_t *next_node = vlib_get_node (vm, n->next_nodes[next_index]);
354 u32 *magic = vlib_frame_find_magic (f, next_node);
355 ASSERT (VLIB_FRAME_MAGIC == magic[0]);
359 vlib_get_next_frame_internal (vlib_main_t * vm,
360 vlib_node_runtime_t * node,
361 u32 next_index, 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), next_index);
421 vlib_put_next_frame_validate (vlib_main_t * vm,
422 vlib_node_runtime_t * rt,
423 u32 next_index, u32 n_vectors_left)
425 vlib_node_main_t *nm = &vm->node_main;
426 vlib_next_frame_t *nf;
428 vlib_node_runtime_t *next_rt;
429 vlib_node_t *next_node;
430 u32 n_before, n_after;
432 nf = vlib_node_runtime_get_next_frame (vm, rt, next_index);
433 f = vlib_get_frame (vm, nf->frame_index);
435 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
436 n_after = VLIB_FRAME_SIZE - n_vectors_left;
437 n_before = f->n_vectors;
439 ASSERT (n_after >= n_before);
441 next_rt = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
442 nf->node_runtime_index);
443 next_node = vlib_get_node (vm, next_rt->node_index);
444 if (n_after > 0 && next_node->validate_frame)
446 u8 *msg = next_node->validate_frame (vm, rt, f);
449 clib_warning ("%v", msg);
457 vlib_put_next_frame (vlib_main_t * vm,
458 vlib_node_runtime_t * r,
459 u32 next_index, u32 n_vectors_left)
461 vlib_node_main_t *nm = &vm->node_main;
462 vlib_next_frame_t *nf;
464 u32 n_vectors_in_frame;
466 if (DPDK == 0 && CLIB_DEBUG > 0)
467 vlib_put_next_frame_validate (vm, r, next_index, n_vectors_left);
469 nf = vlib_node_runtime_get_next_frame (vm, r, next_index);
470 f = vlib_get_frame (vm, nf->frame_index);
472 /* Make sure that magic number is still there. Otherwise, caller
473 has overrun frame meta data. */
476 vlib_node_t *node = vlib_get_node (vm, r->node_index);
477 validate_frame_magic (vm, f, node, next_index);
480 /* Convert # of vectors left -> number of vectors there. */
481 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
482 n_vectors_in_frame = VLIB_FRAME_SIZE - n_vectors_left;
484 f->n_vectors = n_vectors_in_frame;
486 /* If vectors were added to frame, add to pending vector. */
487 if (PREDICT_TRUE (n_vectors_in_frame > 0))
489 vlib_pending_frame_t *p;
492 r->cached_next_index = next_index;
494 if (!(f->flags & VLIB_FRAME_PENDING))
496 __attribute__ ((unused)) vlib_node_t *node;
497 vlib_node_t *next_node;
498 vlib_node_runtime_t *next_runtime;
500 node = vlib_get_node (vm, r->node_index);
501 next_node = vlib_get_next_node (vm, r->node_index, next_index);
502 next_runtime = vlib_node_get_runtime (vm, next_node->index);
504 vec_add2 (nm->pending_frames, p, 1);
506 p->frame_index = nf->frame_index;
507 p->node_runtime_index = nf->node_runtime_index;
508 p->next_frame_index = nf - nm->next_frames;
509 nf->flags |= VLIB_FRAME_PENDING;
510 f->flags |= VLIB_FRAME_PENDING;
513 * If we're going to dispatch this frame on another thread,
514 * force allocation of a new frame. Otherwise, we create
515 * a dangling frame reference. Each thread has its own copy of
516 * the next_frames vector.
518 if (0 && r->cpu_index != next_runtime->cpu_index)
520 nf->frame_index = ~0;
521 nf->flags &= ~(VLIB_FRAME_PENDING | VLIB_FRAME_IS_ALLOCATED);
525 /* Copy trace flag from next_frame and from runtime. */
527 (nf->flags & VLIB_NODE_FLAG_TRACE) | (r->
528 flags & VLIB_NODE_FLAG_TRACE);
530 v0 = nf->vectors_since_last_overflow;
531 v1 = v0 + n_vectors_in_frame;
532 nf->vectors_since_last_overflow = v1;
533 if (PREDICT_FALSE (v1 < v0))
535 vlib_node_t *node = vlib_get_node (vm, r->node_index);
536 vec_elt (node->n_vectors_by_next_node, next_index) += v0;
541 /* Sync up runtime (32 bit counters) and main node stats (64 bit counters). */
543 vlib_node_runtime_sync_stats (vlib_main_t * vm,
544 vlib_node_runtime_t * r,
545 uword n_calls, uword n_vectors, uword n_clocks)
547 vlib_node_t *n = vlib_get_node (vm, r->node_index);
549 n->stats_total.calls += n_calls + r->calls_since_last_overflow;
550 n->stats_total.vectors += n_vectors + r->vectors_since_last_overflow;
551 n->stats_total.clocks += n_clocks + r->clocks_since_last_overflow;
552 n->stats_total.max_clock = r->max_clock;
553 n->stats_total.max_clock_n = r->max_clock_n;
555 r->calls_since_last_overflow = 0;
556 r->vectors_since_last_overflow = 0;
557 r->clocks_since_last_overflow = 0;
560 always_inline void __attribute__ ((unused))
561 vlib_process_sync_stats (vlib_main_t * vm,
563 uword n_calls, uword n_vectors, uword n_clocks)
565 vlib_node_runtime_t *rt = &p->node_runtime;
566 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
567 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks);
568 n->stats_total.suspends += p->n_suspends;
573 vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
575 vlib_node_runtime_t *rt;
577 if (n->type == VLIB_NODE_TYPE_PROCESS)
579 /* Nothing to do for PROCESS nodes except in main thread */
580 if (vm != &vlib_global_main)
583 vlib_process_t *p = vlib_get_process_from_node (vm, n);
584 n->stats_total.suspends += p->n_suspends;
586 rt = &p->node_runtime;
590 vec_elt_at_index (vm->node_main.nodes_by_type[n->type],
593 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0);
595 /* Sync up runtime next frame vector counters with main node structure. */
597 vlib_next_frame_t *nf;
599 for (i = 0; i < rt->n_next_nodes; i++)
601 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
602 vec_elt (n->n_vectors_by_next_node, i) +=
603 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,
613 uword n_vectors, uword n_clocks)
615 u32 ca0, ca1, v0, v1, cl0, cl1, r;
617 cl0 = cl1 = node->clocks_since_last_overflow;
618 ca0 = ca1 = node->calls_since_last_overflow;
619 v0 = v1 = node->vectors_since_last_overflow;
623 cl1 = cl0 + n_clocks;
625 node->calls_since_last_overflow = ca1;
626 node->clocks_since_last_overflow = cl1;
627 node->vectors_since_last_overflow = v1;
628 node->max_clock_n = node->max_clock > n_clocks ?
629 node->max_clock_n : n_vectors;
630 node->max_clock = node->max_clock > n_clocks ? node->max_clock : n_clocks;
632 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
634 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0))
636 node->calls_since_last_overflow = ca0;
637 node->clocks_since_last_overflow = cl0;
638 node->vectors_since_last_overflow = v0;
639 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks);
646 vlib_process_update_stats (vlib_main_t * vm,
648 uword n_calls, uword n_vectors, uword n_clocks)
650 vlib_node_runtime_update_stats (vm, &p->node_runtime,
651 n_calls, n_vectors, n_clocks);
654 static clib_error_t *
655 vlib_cli_elog_clear (vlib_main_t * vm,
656 unformat_input_t * input, vlib_cli_command_t * cmd)
658 elog_reset_buffer (&vm->elog_main);
663 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
664 .path = "event-logger clear",
665 .short_help = "Clear the event log",
666 .function = vlib_cli_elog_clear,
671 static clib_error_t *
672 elog_save_buffer (vlib_main_t * vm,
673 unformat_input_t * input, vlib_cli_command_t * cmd)
675 elog_main_t *em = &vm->elog_main;
676 char *file, *chroot_file;
677 clib_error_t *error = 0;
679 if (!unformat (input, "%s", &file))
681 vlib_cli_output (vm, "expected file name, got `%U'",
682 format_unformat_error, input);
686 /* It's fairly hard to get "../oopsie" through unformat; just in case */
687 if (strstr (file, "..") || index (file, '/'))
689 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
693 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
697 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
698 elog_n_events_in_buffer (em),
699 elog_buffer_capacity (em), chroot_file);
701 vlib_worker_thread_barrier_sync (vm);
702 error = elog_write_file (em, chroot_file);
703 vlib_worker_thread_barrier_release (vm);
704 vec_free (chroot_file);
709 VLIB_CLI_COMMAND (elog_save_cli, static) = {
710 .path = "event-logger save",
711 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
712 .function = elog_save_buffer,
716 static clib_error_t *
717 elog_stop (vlib_main_t * vm,
718 unformat_input_t * input, vlib_cli_command_t * cmd)
720 elog_main_t *em = &vm->elog_main;
722 em->n_total_events_disable_limit = em->n_total_events;
724 vlib_cli_output (vm, "Stopped the event logger...");
729 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
730 .path = "event-logger stop",
731 .short_help = "Stop the event-logger",
732 .function = elog_stop,
736 static clib_error_t *
737 elog_restart (vlib_main_t * vm,
738 unformat_input_t * input, vlib_cli_command_t * cmd)
740 elog_main_t *em = &vm->elog_main;
742 em->n_total_events_disable_limit = ~0;
744 vlib_cli_output (vm, "Restarted the event logger...");
749 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
750 .path = "event-logger restart",
751 .short_help = "Restart the event-logger",
752 .function = elog_restart,
756 static clib_error_t *
757 elog_resize (vlib_main_t * vm,
758 unformat_input_t * input, vlib_cli_command_t * cmd)
760 elog_main_t *em = &vm->elog_main;
763 /* Stop the parade */
764 elog_reset_buffer (&vm->elog_main);
766 if (unformat (input, "%d", &tmp))
768 elog_alloc (em, tmp);
769 em->n_total_events_disable_limit = ~0;
772 return clib_error_return (0, "Must specify how many events in the ring");
774 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
779 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
780 .path = "event-logger resize",
781 .short_help = "event-logger resize <nnn>",
782 .function = elog_resize,
786 #endif /* CLIB_UNIX */
789 elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
791 elog_main_t *em = &vm->elog_main;
792 elog_event_t *e, *es;
795 /* Show events in VLIB time since log clock starts after VLIB clock. */
796 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
797 * vm->clib_time.seconds_per_clock;
799 es = elog_peek_events (em);
800 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
802 em->n_total_events < em->n_total_events_disable_limit ?
803 "running" : "stopped");
806 vlib_cli_output (vm, "%18.9f: %U",
807 e->time + dt, 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, vlib_cli_command_t * cmd)
820 u32 n_events_to_show;
821 clib_error_t *error = 0;
823 n_events_to_show = 250;
824 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
826 if (unformat (input, "%d", &n_events_to_show))
828 else if (unformat (input, "all"))
829 n_events_to_show = ~0;
831 return unformat_parse_error (input);
833 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,
846 vlib_gdb_show_event_log (void)
848 elog_show_buffer_internal (vlib_get_main (), (u32) ~ 0);
852 vlib_elog_main_loop_event (vlib_main_t * vm,
854 u64 time, u32 n_vectors, u32 is_return)
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].
868 elog_track : &em->default_track),
869 /* data to log */ n_vectors);
873 vlib_dump_context_trace (vlib_main_t * vm, u32 bi)
875 vlib_node_main_t *vnm = &vm->node_main;
879 if (VLIB_BUFFER_TRACE_TRAJECTORY)
881 b = vlib_get_buffer (vm, bi);
884 fformat (stderr, "Context trace for bi %d b 0x%llx, visited %d\n",
887 if (n == 0 || n > 20)
889 fformat (stderr, "n is unreasonable\n");
894 for (i = 0; i < n; i++)
898 node_index = b->pre_data[i + 1];
900 if (node_index > vec_len (vnm->nodes))
902 fformat (stderr, "Skip bogus node index %d\n", node_index);
906 fformat (stderr, "%v (%d)\n", vnm->nodes[node_index]->name,
913 "in vlib/buffers.h, #define VLIB_BUFFER_TRACE_TRAJECTORY 1\n");
918 /* static_always_inline */ u64
919 dispatch_node (vlib_main_t * vm,
920 vlib_node_runtime_t * node,
921 vlib_node_type_t type,
922 vlib_node_state_t dispatch_state,
923 vlib_frame_t * frame, u64 last_time_stamp)
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 */
1003 vm->main_loop_vectors_processed += n;
1004 vm->main_loop_nodes_processed += n > 0;
1006 v = vlib_node_runtime_update_stats (stat_vm, node,
1009 /* n_clocks */ t - last_time_stamp);
1011 /* When in interrupt mode and vector rate crosses threshold switch to
1013 if ((DPDK == 0 && dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1014 || (DPDK == 0 && dispatch_state == VLIB_NODE_STATE_POLLING
1016 & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE)))
1018 ELOG_TYPE_DECLARE (e) =
1020 .function = (char *) __FUNCTION__,.format =
1021 "%s vector length %d, switching to %s",.format_args =
1022 "T4i4t4",.n_enum_strings = 2,.enum_strings =
1024 "interrupt", "polling",},};
1027 u32 node_name, vector_length, is_polling;
1030 if (dispatch_state == VLIB_NODE_STATE_INTERRUPT
1031 && v >= nm->polling_threshold_vector_length)
1033 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1034 n->state = VLIB_NODE_STATE_POLLING;
1035 node->state = VLIB_NODE_STATE_POLLING;
1038 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE));
1040 ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1042 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1043 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1044 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1046 ed = ELOG_DATA (&vm->elog_main, e);
1047 ed->node_name = n->name_elog_string;
1048 ed->vector_length = v;
1051 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1052 && v <= nm->interrupt_threshold_vector_length)
1054 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1056 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1058 /* Switch to interrupt mode after dispatch in polling one more time.
1059 This allows driver to re-enable interrupts. */
1060 n->state = VLIB_NODE_STATE_INTERRUPT;
1061 node->state = VLIB_NODE_STATE_INTERRUPT;
1063 ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1064 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -=
1066 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] +=
1073 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1074 ed = ELOG_DATA (&vm->elog_main, e);
1075 ed->node_name = n->name_elog_string;
1076 ed->vector_length = v;
1087 dispatch_pending_node (vlib_main_t * vm,
1088 vlib_pending_frame_t * p, u64 last_time_stamp)
1090 vlib_node_main_t *nm = &vm->node_main;
1092 vlib_next_frame_t *nf, nf_dummy;
1093 vlib_node_runtime_t *n;
1094 u32 restore_frame_index;
1096 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1097 p->node_runtime_index);
1099 f = vlib_get_frame (vm, p->frame_index);
1100 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1102 /* No next frame: so use dummy on stack. */
1104 nf->flags = f->flags & VLIB_NODE_FLAG_TRACE;
1105 nf->frame_index = ~p->frame_index;
1108 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1110 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
1112 /* Force allocation of new frame while current frame is being
1114 restore_frame_index = ~0;
1115 if (nf->frame_index == p->frame_index)
1117 nf->frame_index = ~0;
1118 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1119 if (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1120 restore_frame_index = p->frame_index;
1123 /* Frame must be pending. */
1124 ASSERT (f->flags & VLIB_FRAME_PENDING);
1125 ASSERT (f->n_vectors > 0);
1127 /* Copy trace flag from next frame to node.
1128 Trace flag indicates that at least one vector in the dispatched
1130 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1131 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1132 nf->flags &= ~VLIB_FRAME_TRACE;
1134 last_time_stamp = dispatch_node (vm, n,
1135 VLIB_NODE_TYPE_INTERNAL,
1136 VLIB_NODE_STATE_POLLING,
1137 f, last_time_stamp);
1139 f->flags &= ~VLIB_FRAME_PENDING;
1141 /* Frame is ready to be used again, so restore it. */
1142 if (restore_frame_index != ~0)
1144 /* p->next_frame_index can change during node dispatch if node
1145 function decides to change graph hook up. */
1146 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1147 nf->frame_index = restore_frame_index;
1148 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1151 if (f->flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1153 ASSERT (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1154 vlib_frame_free (vm, n, f);
1157 return last_time_stamp;
1161 vlib_process_stack_is_valid (vlib_process_t * p)
1163 return p->stack[0] == VLIB_PROCESS_STACK_MAGIC;
1169 vlib_process_t *process;
1170 vlib_frame_t *frame;
1171 } vlib_process_bootstrap_args_t;
1173 /* Called in process stack. */
1175 vlib_process_bootstrap (uword _a)
1177 vlib_process_bootstrap_args_t *a;
1179 vlib_node_runtime_t *node;
1184 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1189 node = &p->node_runtime;
1191 n = node->function (vm, node, f);
1193 ASSERT (vlib_process_stack_is_valid (p));
1195 clib_longjmp (&p->return_longjmp, n);
1200 /* Called in main stack. */
1201 static_always_inline uword
1202 vlib_process_startup (vlib_main_t * vm, vlib_process_t * p, vlib_frame_t * f)
1204 vlib_process_bootstrap_args_t a;
1211 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1212 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1213 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1214 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1219 static_always_inline uword
1220 vlib_process_resume (vlib_process_t * p)
1223 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1224 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1225 | VLIB_PROCESS_RESUME_PENDING);
1226 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1227 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1228 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1233 dispatch_process (vlib_main_t * vm,
1234 vlib_process_t * p, vlib_frame_t * f, u64 last_time_stamp)
1236 vlib_node_main_t *nm = &vm->node_main;
1237 vlib_node_runtime_t *node_runtime = &p->node_runtime;
1238 vlib_node_t *node = vlib_get_node (vm, node_runtime->node_index);
1240 uword n_vectors, is_suspend;
1242 if (node->state != VLIB_NODE_STATE_POLLING
1243 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1244 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1245 return last_time_stamp;
1247 p->flags |= VLIB_PROCESS_IS_RUNNING;
1249 t = last_time_stamp;
1250 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1251 f ? f->n_vectors : 0, /* is_after */ 0);
1253 /* Save away current process for suspend. */
1254 nm->current_process_index = node->runtime_index;
1256 n_vectors = vlib_process_startup (vm, p, f);
1258 nm->current_process_index = ~0;
1260 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1261 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1264 vlib_pending_frame_t *pf;
1267 pool_get (nm->suspended_process_frames, pf);
1268 pf->node_runtime_index = node->runtime_index;
1269 pf->frame_index = f ? vlib_frame_index (vm, f) : ~0;
1270 pf->next_frame_index = ~0;
1273 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1275 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1276 timing_wheel_insert (&nm->timing_wheel, p->resume_cpu_time,
1277 vlib_timing_wheel_data_set_suspended_process
1278 (node->runtime_index));
1281 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1283 t = clib_cpu_time_now ();
1285 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend,
1288 vlib_process_update_stats (vm, p,
1289 /* n_calls */ !is_suspend,
1290 /* n_vectors */ n_vectors,
1291 /* n_clocks */ t - last_time_stamp);
1297 vlib_start_process (vlib_main_t * vm, uword process_index)
1299 vlib_node_main_t *nm = &vm->node_main;
1300 vlib_process_t *p = vec_elt (nm->processes, process_index);
1301 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1305 dispatch_suspended_process (vlib_main_t * vm,
1306 uword process_index, u64 last_time_stamp)
1308 vlib_node_main_t *nm = &vm->node_main;
1309 vlib_node_runtime_t *node_runtime;
1313 vlib_pending_frame_t *pf;
1314 u64 t, n_vectors, is_suspend;
1316 t = last_time_stamp;
1318 p = vec_elt (nm->processes, process_index);
1319 if (PREDICT_FALSE (!(p->flags & VLIB_PROCESS_IS_RUNNING)))
1320 return last_time_stamp;
1322 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1323 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1326 pool_elt_at_index (nm->suspended_process_frames,
1327 p->suspended_process_frame_index);
1329 node_runtime = &p->node_runtime;
1330 node = vlib_get_node (vm, node_runtime->node_index);
1331 f = pf->frame_index != ~0 ? vlib_get_frame (vm, pf->frame_index) : 0;
1333 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1334 f ? f->n_vectors : 0, /* is_after */ 0);
1336 /* Save away current process for suspend. */
1337 nm->current_process_index = node->runtime_index;
1339 n_vectors = vlib_process_resume (p);
1340 t = clib_cpu_time_now ();
1342 nm->current_process_index = ~0;
1344 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1347 /* Suspend it again. */
1350 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1351 timing_wheel_insert (&nm->timing_wheel, p->resume_cpu_time,
1352 vlib_timing_wheel_data_set_suspended_process
1353 (node->runtime_index));
1357 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1358 p->suspended_process_frame_index = ~0;
1359 pool_put (nm->suspended_process_frames, pf);
1362 t = clib_cpu_time_now ();
1363 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, !is_suspend,
1366 vlib_process_update_stats (vm, p,
1367 /* n_calls */ !is_suspend,
1368 /* n_vectors */ n_vectors,
1369 /* n_clocks */ t - last_time_stamp);
1375 vlib_main_loop (vlib_main_t * vm)
1377 vlib_node_main_t *nm = &vm->node_main;
1381 /* Initialize pending node vector. */
1382 vec_resize (nm->pending_frames, 32);
1383 _vec_len (nm->pending_frames) = 0;
1385 /* Mark time of main loop start. */
1386 cpu_time_now = vm->clib_time.last_cpu_time;
1387 vm->cpu_time_main_loop_start = cpu_time_now;
1389 /* Arrange for first level of timing wheel to cover times we care
1391 nm->timing_wheel.min_sched_time = 10e-6;
1392 nm->timing_wheel.max_sched_time = 10e-3;
1393 timing_wheel_init (&nm->timing_wheel,
1394 cpu_time_now, vm->clib_time.clocks_per_second);
1396 /* Pre-allocate expired nodes. */
1397 vec_alloc (nm->data_from_advancing_timing_wheel, 32);
1398 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1400 if (!nm->polling_threshold_vector_length)
1401 nm->polling_threshold_vector_length = 10;
1402 if (!nm->interrupt_threshold_vector_length)
1403 nm->interrupt_threshold_vector_length = 5;
1405 nm->current_process_index = ~0;
1407 /* Start all processes. */
1410 for (i = 0; i < vec_len (nm->processes); i++)
1412 dispatch_process (vm, nm->processes[i], /* frame */ 0, cpu_time_now);
1417 vlib_node_runtime_t *n;
1419 /* Process pre-input nodes. */
1420 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1421 cpu_time_now = dispatch_node (vm, n,
1422 VLIB_NODE_TYPE_PRE_INPUT,
1423 VLIB_NODE_STATE_POLLING,
1427 /* Next process input nodes. */
1428 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1429 cpu_time_now = dispatch_node (vm, n,
1430 VLIB_NODE_TYPE_INPUT,
1431 VLIB_NODE_STATE_POLLING,
1435 if (PREDICT_TRUE (vm->queue_signal_pending == 0))
1436 vm->queue_signal_callback (vm);
1438 /* Next handle interrupts. */
1440 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1444 _vec_len (nm->pending_interrupt_node_runtime_indices) = 0;
1445 for (i = 0; i < l; i++)
1447 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1449 pending_interrupt_node_runtime_indices
1452 dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
1453 VLIB_NODE_STATE_INTERRUPT,
1460 /* Check if process nodes have expired from timing wheel. */
1461 nm->data_from_advancing_timing_wheel
1462 = timing_wheel_advance (&nm->timing_wheel, cpu_time_now,
1463 nm->data_from_advancing_timing_wheel,
1464 &nm->cpu_time_next_process_ready);
1466 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1467 if (PREDICT_FALSE (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1471 processes_timing_wheel_data:
1472 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel);
1475 u32 d = nm->data_from_advancing_timing_wheel[i];
1476 u32 di = vlib_timing_wheel_data_get_index (d);
1478 if (vlib_timing_wheel_data_is_timed_event (d))
1480 vlib_signal_timed_event_data_t *te =
1481 pool_elt_at_index (nm->signal_timed_event_data_pool, di);
1482 vlib_node_t *n = vlib_get_node (vm, te->process_node_index);
1484 vec_elt (nm->processes, n->runtime_index);
1487 vlib_process_signal_event_helper (nm, n, p,
1488 te->event_type_index,
1490 te->n_data_elt_bytes);
1491 if (te->n_data_bytes < sizeof (te->inline_event_data))
1492 clib_memcpy (data, te->inline_event_data,
1496 clib_memcpy (data, te->event_data_as_vector,
1498 vec_free (te->event_data_as_vector);
1500 pool_put (nm->signal_timed_event_data_pool, te);
1504 cpu_time_now = clib_cpu_time_now ();
1506 dispatch_suspended_process (vm, di, cpu_time_now);
1511 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1514 /* Input nodes may have added work to the pending vector.
1515 Process pending vector until there is nothing left.
1516 All pending vectors will be processed from input -> output. */
1517 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1518 cpu_time_now = dispatch_pending_node (vm, nm->pending_frames + i,
1520 /* Reset pending vector for next iteration. */
1521 _vec_len (nm->pending_frames) = 0;
1523 /* Pending internal nodes may resume processes. */
1524 if (_vec_len (nm->data_from_advancing_timing_wheel) > 0)
1525 goto processes_timing_wheel_data;
1527 vlib_increment_main_loop_counter (vm);
1529 /* Record time stamp in case there are no enabled nodes and above
1530 calls do not update time stamp. */
1531 cpu_time_now = clib_cpu_time_now ();
1535 vlib_main_t vlib_global_main;
1537 static clib_error_t *
1538 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1540 int turn_on_mem_trace = 0;
1542 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1544 if (unformat (input, "memory-trace"))
1545 turn_on_mem_trace = 1;
1547 else if (unformat (input, "elog-events %d",
1548 &vm->elog_main.event_ring_size))
1551 return unformat_parse_error (input);
1554 unformat_free (input);
1556 /* Enable memory trace as early as possible. */
1557 if (turn_on_mem_trace)
1563 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
1566 dummy_queue_signal_callback (vlib_main_t * vm)
1570 /* Main function. */
1572 vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
1574 clib_error_t *volatile error;
1576 vm->queue_signal_callback = dummy_queue_signal_callback;
1578 clib_time_init (&vm->clib_time);
1580 /* Turn on event log. */
1581 if (!vm->elog_main.event_ring_size)
1582 vm->elog_main.event_ring_size = 128 << 10;
1583 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
1584 elog_enable_disable (&vm->elog_main, 1);
1590 vec_validate (vm->buffer_main, 0);
1592 if ((error = vlib_thread_init (vm)))
1594 clib_error_report (error);
1598 /* Register static nodes so that init functions may use them. */
1599 vlib_register_all_static_nodes (vm);
1601 /* Set seed for random number generator.
1602 Allow user to specify seed to make random sequence deterministic. */
1603 if (!unformat (input, "seed %wd", &vm->random_seed))
1604 vm->random_seed = clib_cpu_time_now ();
1605 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
1607 /* Initialize node graph. */
1608 if ((error = vlib_node_main_init (vm)))
1610 /* Arrange for graph hook up error to not be fatal when debugging. */
1612 clib_error_report (error);
1617 /* See unix/main.c; most likely already set up */
1618 if (vm->init_functions_called == 0)
1619 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
1620 if ((error = vlib_call_all_init_functions (vm)))
1623 /* Create default buffer free list. */
1624 vlib_buffer_get_or_create_free_list (vm,
1625 VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
1628 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
1630 case VLIB_MAIN_LOOP_EXIT_NONE:
1631 vm->main_loop_exit_set = 1;
1634 case VLIB_MAIN_LOOP_EXIT_CLI:
1638 error = vm->main_loop_error;
1642 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
1645 /* Call all main loop enter functions. */
1647 clib_error_t *sub_error;
1648 sub_error = vlib_call_all_main_loop_enter_functions (vm);
1650 clib_error_report (sub_error);
1653 vlib_main_loop (vm);
1656 /* Call all exit functions. */
1658 clib_error_t *sub_error;
1659 sub_error = vlib_call_all_main_loop_exit_functions (vm);
1661 clib_error_report (sub_error);
1665 clib_error_report (error);
1671 * fd.io coding-style-patch-verification: ON
1674 * eval: (c-set-style "gnu")