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>
44 #include <vppinfra/tw_timer_1t_3w_1024sl_ov.h>
46 #include <vlib/unix/cj.h>
48 CJ_GLOBAL_LOG_PROTOTYPE;
50 /* Actually allocate a few extra slots of vector data to support
51 speculative vector enqueues which overflow vector data in next frame. */
52 #define VLIB_FRAME_SIZE_ALLOC (VLIB_FRAME_SIZE + 4)
57 vlib_frame_bytes (u32 n_scalar_bytes, u32 n_vector_bytes)
61 /* Make room for vlib_frame_t plus scalar arguments. */
62 n_bytes = vlib_frame_vector_byte_offset (n_scalar_bytes);
64 /* Make room for vector arguments.
65 Allocate a few extra slots of vector data to support
66 speculative vector enqueues which overflow vector data in next frame. */
67 #define VLIB_FRAME_SIZE_EXTRA 4
68 n_bytes += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * n_vector_bytes;
70 /* Magic number is first 32bit number after vector data.
71 Used to make sure that vector data is never overrun. */
72 #define VLIB_FRAME_MAGIC (0xabadc0ed)
73 n_bytes += sizeof (u32);
75 /* Pad to cache line. */
76 n_bytes = round_pow2 (n_bytes, CLIB_CACHE_LINE_BYTES);
82 vlib_frame_find_magic (vlib_frame_t * f, vlib_node_t * node)
86 p += vlib_frame_vector_byte_offset (node->scalar_size);
88 p += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * node->vector_size;
93 static vlib_frame_size_t *
94 get_frame_size_info (vlib_node_main_t * nm,
95 u32 n_scalar_bytes, u32 n_vector_bytes)
97 uword key = (n_scalar_bytes << 16) | n_vector_bytes;
100 p = hash_get (nm->frame_size_hash, key);
105 i = vec_len (nm->frame_sizes);
106 vec_validate (nm->frame_sizes, i);
107 hash_set (nm->frame_size_hash, key, i);
110 return vec_elt_at_index (nm->frame_sizes, i);
114 vlib_frame_alloc_to_node (vlib_main_t * vm, u32 to_node_index,
117 vlib_node_main_t *nm = &vm->node_main;
118 vlib_frame_size_t *fs;
119 vlib_node_t *to_node;
121 u32 fi, l, n, scalar_size, vector_size;
123 to_node = vlib_get_node (vm, to_node_index);
125 scalar_size = to_node->scalar_size;
126 vector_size = to_node->vector_size;
128 fs = get_frame_size_info (nm, scalar_size, vector_size);
129 n = vlib_frame_bytes (scalar_size, vector_size);
130 if ((l = vec_len (fs->free_frame_indices)) > 0)
132 /* Allocate from end of free list. */
133 fi = fs->free_frame_indices[l - 1];
134 f = vlib_get_frame_no_check (vm, fi);
135 _vec_len (fs->free_frame_indices) = l - 1;
139 f = clib_mem_alloc_aligned_no_fail (n, VLIB_FRAME_ALIGN);
140 f->thread_index = vm->thread_index;
141 fi = vlib_frame_index_no_check (vm, f);
144 /* Poison frame when debugging. */
147 u32 save_thread_index = f->thread_index;
151 f->thread_index = save_thread_index;
154 /* Insert magic number. */
158 magic = vlib_frame_find_magic (f, to_node);
159 *magic = VLIB_FRAME_MAGIC;
162 f->flags = VLIB_FRAME_IS_ALLOCATED | frame_flags;
164 f->scalar_size = scalar_size;
165 f->vector_size = vector_size;
167 fs->n_alloc_frames += 1;
172 /* Allocate a frame for from FROM_NODE to TO_NODE via TO_NEXT_INDEX.
173 Returns frame index. */
175 vlib_frame_alloc (vlib_main_t * vm, vlib_node_runtime_t * from_node_runtime,
178 vlib_node_t *from_node;
180 from_node = vlib_get_node (vm, from_node_runtime->node_index);
181 ASSERT (to_next_index < vec_len (from_node->next_nodes));
183 return vlib_frame_alloc_to_node (vm, from_node->next_nodes[to_next_index],
184 /* frame_flags */ 0);
188 vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index)
190 u32 fi = vlib_frame_alloc_to_node (vm, to_node_index,
192 VLIB_FRAME_FREE_AFTER_DISPATCH);
193 return vlib_get_frame (vm, fi);
197 vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index, vlib_frame_t * f)
199 vlib_pending_frame_t *p;
200 vlib_node_t *to_node;
202 if (f->n_vectors == 0)
205 to_node = vlib_get_node (vm, to_node_index);
207 vec_add2 (vm->node_main.pending_frames, p, 1);
209 f->flags |= VLIB_FRAME_PENDING;
210 p->frame_index = vlib_frame_index (vm, f);
211 p->node_runtime_index = to_node->runtime_index;
212 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
215 /* Free given frame. */
217 vlib_frame_free (vlib_main_t * vm, vlib_node_runtime_t * r, vlib_frame_t * f)
219 vlib_node_main_t *nm = &vm->node_main;
221 vlib_frame_size_t *fs;
224 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
226 node = vlib_get_node (vm, r->node_index);
227 fs = get_frame_size_info (nm, node->scalar_size, node->vector_size);
229 frame_index = vlib_frame_index (vm, f);
231 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
233 /* No next frames may point to freed frame. */
236 vlib_next_frame_t *nf;
237 vec_foreach (nf, vm->node_main.next_frames)
238 ASSERT (nf->frame_index != frame_index);
241 f->flags &= ~VLIB_FRAME_IS_ALLOCATED;
243 vec_add1 (fs->free_frame_indices, frame_index);
244 ASSERT (fs->n_alloc_frames > 0);
245 fs->n_alloc_frames -= 1;
248 static clib_error_t *
249 show_frame_stats (vlib_main_t * vm,
250 unformat_input_t * input, vlib_cli_command_t * cmd)
252 vlib_node_main_t *nm = &vm->node_main;
253 vlib_frame_size_t *fs;
255 vlib_cli_output (vm, "%=6s%=12s%=12s", "Size", "# Alloc", "# Free");
256 vec_foreach (fs, nm->frame_sizes)
258 u32 n_alloc = fs->n_alloc_frames;
259 u32 n_free = vec_len (fs->free_frame_indices);
261 if (n_alloc + n_free > 0)
262 vlib_cli_output (vm, "%=6d%=12d%=12d",
263 fs - nm->frame_sizes, n_alloc, n_free);
270 VLIB_CLI_COMMAND (show_frame_stats_cli, static) = {
271 .path = "show vlib frame-allocation",
272 .short_help = "Show node dispatch frame statistics",
273 .function = show_frame_stats,
277 /* Change ownership of enqueue rights to given next node. */
279 vlib_next_frame_change_ownership (vlib_main_t * vm,
280 vlib_node_runtime_t * node_runtime,
283 vlib_node_main_t *nm = &vm->node_main;
284 vlib_next_frame_t *next_frame;
285 vlib_node_t *node, *next_node;
287 node = vec_elt (nm->nodes, node_runtime->node_index);
289 /* Only internal & input nodes are allowed to call other nodes. */
290 ASSERT (node->type == VLIB_NODE_TYPE_INTERNAL
291 || node->type == VLIB_NODE_TYPE_INPUT
292 || node->type == VLIB_NODE_TYPE_PROCESS);
294 ASSERT (vec_len (node->next_nodes) == node_runtime->n_next_nodes);
297 vlib_node_runtime_get_next_frame (vm, node_runtime, next_index);
298 next_node = vec_elt (nm->nodes, node->next_nodes[next_index]);
300 if (next_node->owner_node_index != VLIB_INVALID_NODE_INDEX)
302 /* Get frame from previous owner. */
303 vlib_next_frame_t *owner_next_frame;
304 vlib_next_frame_t tmp;
307 vlib_node_get_next_frame (vm,
308 next_node->owner_node_index,
309 next_node->owner_next_index);
311 /* Swap target next frame with owner's. */
312 tmp = owner_next_frame[0];
313 owner_next_frame[0] = next_frame[0];
317 * If next_frame is already pending, we have to track down
318 * all pending frames and fix their next_frame_index fields.
320 if (next_frame->flags & VLIB_FRAME_PENDING)
322 vlib_pending_frame_t *p;
323 if (next_frame->frame_index != ~0)
325 vec_foreach (p, nm->pending_frames)
327 if (p->frame_index == next_frame->frame_index)
329 p->next_frame_index =
330 next_frame - vm->node_main.next_frames;
338 /* No previous owner. Take ownership. */
339 next_frame->flags |= VLIB_FRAME_OWNER;
342 /* Record new owner. */
343 next_node->owner_node_index = node->index;
344 next_node->owner_next_index = next_index;
346 /* Now we should be owner. */
347 ASSERT (next_frame->flags & VLIB_FRAME_OWNER);
350 /* Make sure that magic number is still there.
351 Otherwise, it is likely that caller has overrun frame arguments. */
353 validate_frame_magic (vlib_main_t * vm,
354 vlib_frame_t * f, vlib_node_t * n, uword next_index)
356 vlib_node_t *next_node = vlib_get_node (vm, n->next_nodes[next_index]);
357 u32 *magic = vlib_frame_find_magic (f, next_node);
358 ASSERT (VLIB_FRAME_MAGIC == magic[0]);
362 vlib_get_next_frame_internal (vlib_main_t * vm,
363 vlib_node_runtime_t * node,
364 u32 next_index, u32 allocate_new_next_frame)
367 vlib_next_frame_t *nf;
370 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
372 /* Make sure this next frame owns right to enqueue to destination frame. */
373 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_OWNER)))
374 vlib_next_frame_change_ownership (vm, node, next_index);
376 /* ??? Don't need valid flag: can use frame_index == ~0 */
377 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_IS_ALLOCATED)))
379 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
380 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
383 f = vlib_get_frame (vm, nf->frame_index);
385 /* Has frame been removed from pending vector (e.g. finished dispatching)?
386 If so we can reuse frame. */
387 if ((nf->flags & VLIB_FRAME_PENDING) && !(f->flags & VLIB_FRAME_PENDING))
389 nf->flags &= ~VLIB_FRAME_PENDING;
393 /* Allocate new frame if current one is already full. */
394 n_used = f->n_vectors;
395 if (n_used >= VLIB_FRAME_SIZE || (allocate_new_next_frame && n_used > 0))
397 /* Old frame may need to be freed after dispatch, since we'll have
398 two redundant frames from node -> next node. */
399 if (!(nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH))
401 vlib_frame_t *f_old = vlib_get_frame (vm, nf->frame_index);
402 f_old->flags |= VLIB_FRAME_FREE_AFTER_DISPATCH;
405 /* Allocate new frame to replace full one. */
406 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
407 f = vlib_get_frame (vm, nf->frame_index);
408 n_used = f->n_vectors;
411 /* Should have free vectors in frame now. */
412 ASSERT (n_used < VLIB_FRAME_SIZE);
416 validate_frame_magic (vm, f,
417 vlib_get_node (vm, node->node_index), next_index);
424 vlib_put_next_frame_validate (vlib_main_t * vm,
425 vlib_node_runtime_t * rt,
426 u32 next_index, u32 n_vectors_left)
428 vlib_node_main_t *nm = &vm->node_main;
429 vlib_next_frame_t *nf;
431 vlib_node_runtime_t *next_rt;
432 vlib_node_t *next_node;
433 u32 n_before, n_after;
435 nf = vlib_node_runtime_get_next_frame (vm, rt, next_index);
436 f = vlib_get_frame (vm, nf->frame_index);
438 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
439 n_after = VLIB_FRAME_SIZE - n_vectors_left;
440 n_before = f->n_vectors;
442 ASSERT (n_after >= n_before);
444 next_rt = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
445 nf->node_runtime_index);
446 next_node = vlib_get_node (vm, next_rt->node_index);
447 if (n_after > 0 && next_node->validate_frame)
449 u8 *msg = next_node->validate_frame (vm, rt, f);
452 clib_warning ("%v", msg);
460 vlib_put_next_frame (vlib_main_t * vm,
461 vlib_node_runtime_t * r,
462 u32 next_index, u32 n_vectors_left)
464 vlib_node_main_t *nm = &vm->node_main;
465 vlib_next_frame_t *nf;
467 u32 n_vectors_in_frame;
469 if (vm->buffer_main->extern_buffer_mgmt == 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->thread_index != next_runtime->thread_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. */
530 (nf->flags & VLIB_NODE_FLAG_TRACE) | (r->
531 flags & VLIB_NODE_FLAG_TRACE);
533 v0 = nf->vectors_since_last_overflow;
534 v1 = v0 + n_vectors_in_frame;
535 nf->vectors_since_last_overflow = v1;
536 if (PREDICT_FALSE (v1 < v0))
538 vlib_node_t *node = vlib_get_node (vm, r->node_index);
539 vec_elt (node->n_vectors_by_next_node, next_index) += v0;
544 /* Sync up runtime (32 bit counters) and main node stats (64 bit counters). */
546 vlib_node_runtime_sync_stats (vlib_main_t * vm,
547 vlib_node_runtime_t * r,
548 uword n_calls, uword n_vectors, uword n_clocks)
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,
566 uword n_calls, uword n_vectors, uword n_clocks)
568 vlib_node_runtime_t *rt = &p->node_runtime;
569 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
570 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks);
571 n->stats_total.suspends += p->n_suspends;
576 vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
578 vlib_node_runtime_t *rt;
580 if (n->type == VLIB_NODE_TYPE_PROCESS)
582 /* Nothing to do for PROCESS nodes except in main thread */
583 if (vm != &vlib_global_main)
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;
593 vec_elt_at_index (vm->node_main.nodes_by_type[n->type],
596 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0);
598 /* Sync up runtime next frame vector counters with main node structure. */
600 vlib_next_frame_t *nf;
602 for (i = 0; i < rt->n_next_nodes; i++)
604 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
605 vec_elt (n->n_vectors_by_next_node, i) +=
606 nf->vectors_since_last_overflow;
607 nf->vectors_since_last_overflow = 0;
613 vlib_node_runtime_update_stats (vlib_main_t * vm,
614 vlib_node_runtime_t * node,
616 uword n_vectors, uword n_clocks)
618 u32 ca0, ca1, v0, v1, cl0, cl1, r;
620 cl0 = cl1 = node->clocks_since_last_overflow;
621 ca0 = ca1 = node->calls_since_last_overflow;
622 v0 = v1 = node->vectors_since_last_overflow;
626 cl1 = cl0 + n_clocks;
628 node->calls_since_last_overflow = ca1;
629 node->clocks_since_last_overflow = cl1;
630 node->vectors_since_last_overflow = v1;
631 node->max_clock_n = node->max_clock > n_clocks ?
632 node->max_clock_n : n_vectors;
633 node->max_clock = node->max_clock > n_clocks ? node->max_clock : n_clocks;
635 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
637 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0))
639 node->calls_since_last_overflow = ca0;
640 node->clocks_since_last_overflow = cl0;
641 node->vectors_since_last_overflow = v0;
642 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks);
649 vlib_process_update_stats (vlib_main_t * vm,
651 uword n_calls, uword n_vectors, uword n_clocks)
653 vlib_node_runtime_update_stats (vm, &p->node_runtime,
654 n_calls, n_vectors, n_clocks);
657 static clib_error_t *
658 vlib_cli_elog_clear (vlib_main_t * vm,
659 unformat_input_t * input, vlib_cli_command_t * cmd)
661 elog_reset_buffer (&vm->elog_main);
666 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
667 .path = "event-logger clear",
668 .short_help = "Clear the event log",
669 .function = vlib_cli_elog_clear,
674 static clib_error_t *
675 elog_save_buffer (vlib_main_t * vm,
676 unformat_input_t * input, vlib_cli_command_t * cmd)
678 elog_main_t *em = &vm->elog_main;
679 char *file, *chroot_file;
680 clib_error_t *error = 0;
682 if (!unformat (input, "%s", &file))
684 vlib_cli_output (vm, "expected file name, got `%U'",
685 format_unformat_error, input);
689 /* It's fairly hard to get "../oopsie" through unformat; just in case */
690 if (strstr (file, "..") || index (file, '/'))
692 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
696 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
700 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
701 elog_n_events_in_buffer (em),
702 elog_buffer_capacity (em), chroot_file);
704 vlib_worker_thread_barrier_sync (vm);
705 error = elog_write_file (em, chroot_file, 1 /* flush ring */ );
706 vlib_worker_thread_barrier_release (vm);
707 vec_free (chroot_file);
712 elog_post_mortem_dump (void)
714 vlib_main_t *vm = &vlib_global_main;
715 elog_main_t *em = &vm->elog_main;
719 if (!vm->elog_post_mortem_dump)
722 filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0);
723 error = elog_write_file (em, (char *) filename, 1 /* flush ring */ );
725 clib_error_report (error);
730 VLIB_CLI_COMMAND (elog_save_cli, static) = {
731 .path = "event-logger save",
732 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
733 .function = elog_save_buffer,
737 static clib_error_t *
738 elog_stop (vlib_main_t * vm,
739 unformat_input_t * input, vlib_cli_command_t * cmd)
741 elog_main_t *em = &vm->elog_main;
743 em->n_total_events_disable_limit = em->n_total_events;
745 vlib_cli_output (vm, "Stopped the event logger...");
750 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
751 .path = "event-logger stop",
752 .short_help = "Stop the event-logger",
753 .function = elog_stop,
757 static clib_error_t *
758 elog_restart (vlib_main_t * vm,
759 unformat_input_t * input, vlib_cli_command_t * cmd)
761 elog_main_t *em = &vm->elog_main;
763 em->n_total_events_disable_limit = ~0;
765 vlib_cli_output (vm, "Restarted the event logger...");
770 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
771 .path = "event-logger restart",
772 .short_help = "Restart the event-logger",
773 .function = elog_restart,
777 static clib_error_t *
778 elog_resize (vlib_main_t * vm,
779 unformat_input_t * input, vlib_cli_command_t * cmd)
781 elog_main_t *em = &vm->elog_main;
784 /* Stop the parade */
785 elog_reset_buffer (&vm->elog_main);
787 if (unformat (input, "%d", &tmp))
789 elog_alloc (em, tmp);
790 em->n_total_events_disable_limit = ~0;
793 return clib_error_return (0, "Must specify how many events in the ring");
795 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
800 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
801 .path = "event-logger resize",
802 .short_help = "event-logger resize <nnn>",
803 .function = elog_resize,
807 #endif /* CLIB_UNIX */
810 elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
812 elog_main_t *em = &vm->elog_main;
813 elog_event_t *e, *es;
816 /* Show events in VLIB time since log clock starts after VLIB clock. */
817 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
818 * vm->clib_time.seconds_per_clock;
820 es = elog_peek_events (em);
821 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
823 em->n_total_events < em->n_total_events_disable_limit ?
824 "running" : "stopped");
827 vlib_cli_output (vm, "%18.9f: %U",
828 e->time + dt, format_elog_event, em, e);
830 if (n_events_to_show == 0)
837 static clib_error_t *
838 elog_show_buffer (vlib_main_t * vm,
839 unformat_input_t * input, vlib_cli_command_t * cmd)
841 u32 n_events_to_show;
842 clib_error_t *error = 0;
844 n_events_to_show = 250;
845 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
847 if (unformat (input, "%d", &n_events_to_show))
849 else if (unformat (input, "all"))
850 n_events_to_show = ~0;
852 return unformat_parse_error (input);
854 elog_show_buffer_internal (vm, n_events_to_show);
859 VLIB_CLI_COMMAND (elog_show_cli, static) = {
860 .path = "show event-logger",
861 .short_help = "Show event logger info",
862 .function = elog_show_buffer,
867 vlib_gdb_show_event_log (void)
869 elog_show_buffer_internal (vlib_get_main (), (u32) ~ 0);
873 vlib_elog_main_loop_event (vlib_main_t * vm,
875 u64 time, u32 n_vectors, u32 is_return)
877 vlib_main_t *evm = &vlib_global_main;
878 elog_main_t *em = &evm->elog_main;
880 if (VLIB_ELOG_MAIN_LOOP && n_vectors)
883 vec_elt_at_index (is_return
884 ? evm->node_return_elog_event_types
885 : evm->node_call_elog_event_types,
888 (vm->thread_index ? &vlib_worker_threads[vm->thread_index].
889 elog_track : &em->default_track),
890 /* data to log */ n_vectors);
894 vlib_dump_context_trace (vlib_main_t * vm, u32 bi)
896 vlib_node_main_t *vnm = &vm->node_main;
900 if (VLIB_BUFFER_TRACE_TRAJECTORY)
902 b = vlib_get_buffer (vm, bi);
905 fformat (stderr, "Context trace for bi %d b 0x%llx, visited %d\n",
908 if (n == 0 || n > 20)
910 fformat (stderr, "n is unreasonable\n");
915 for (i = 0; i < n; i++)
919 node_index = b->pre_data[i + 1];
921 if (node_index > vec_len (vnm->nodes))
923 fformat (stderr, "Skip bogus node index %d\n", node_index);
927 fformat (stderr, "%v (%d)\n", vnm->nodes[node_index]->name,
934 "in vlib/buffers.h, #define VLIB_BUFFER_TRACE_TRAJECTORY 1\n");
939 static_always_inline u64
940 dispatch_node (vlib_main_t * vm,
941 vlib_node_runtime_t * node,
942 vlib_node_type_t type,
943 vlib_node_state_t dispatch_state,
944 vlib_frame_t * frame, u64 last_time_stamp)
948 vlib_node_main_t *nm = &vm->node_main;
949 vlib_next_frame_t *nf;
953 vlib_node_t *n = vlib_get_node (vm, node->node_index);
954 ASSERT (n->type == type);
957 /* Only non-internal nodes may be disabled. */
958 if (type != VLIB_NODE_TYPE_INTERNAL && node->state != dispatch_state)
960 ASSERT (type != VLIB_NODE_TYPE_INTERNAL);
961 return last_time_stamp;
964 if ((type == VLIB_NODE_TYPE_PRE_INPUT || type == VLIB_NODE_TYPE_INPUT)
965 && dispatch_state != VLIB_NODE_STATE_INTERRUPT)
967 u32 c = node->input_main_loops_per_call;
968 /* Only call node when count reaches zero. */
971 node->input_main_loops_per_call = c - 1;
972 return last_time_stamp;
976 /* Speculatively prefetch next frames. */
977 if (node->n_next_nodes > 0)
979 nf = vec_elt_at_index (nm->next_frames, node->next_frame_index);
980 CLIB_PREFETCH (nf, 4 * sizeof (nf[0]), WRITE);
983 vm->cpu_time_last_node_dispatch = last_time_stamp;
985 if (1 /* || vm->thread_index == node->thread_index */ )
987 vlib_main_t *stat_vm;
989 stat_vm = /* vlib_mains ? vlib_mains[0] : */ vm;
991 vlib_elog_main_loop_event (vm, node->node_index,
993 frame ? frame->n_vectors : 0,
997 * Turn this on if you run into
998 * "bad monkey" contexts, and you want to know exactly
999 * which nodes they've visited... See ixge.c...
1001 if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
1006 from = vlib_frame_vector_args (frame);
1007 for (i = 0; i < frame->n_vectors; i++)
1009 vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
1010 ASSERT (b->pre_data[0] < 32);
1011 log_index = b->pre_data[0]++ + 1;
1012 b->pre_data[log_index] = node->node_index;
1014 n = node->function (vm, node, frame);
1017 n = node->function (vm, node, frame);
1019 t = clib_cpu_time_now ();
1021 vlib_elog_main_loop_event (vm, node->node_index, t, n, /* is_after */
1024 vm->main_loop_vectors_processed += n;
1025 vm->main_loop_nodes_processed += n > 0;
1027 v = vlib_node_runtime_update_stats (stat_vm, node,
1030 /* n_clocks */ t - last_time_stamp);
1032 /* When in interrupt mode and vector rate crosses threshold switch to
1034 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1035 || (dispatch_state == VLIB_NODE_STATE_POLLING
1037 & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE)))
1039 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1040 ELOG_TYPE_DECLARE (e) =
1042 .function = (char *) __FUNCTION__,.format =
1043 "%s vector length %d, switching to %s",.format_args =
1044 "T4i4t4",.n_enum_strings = 2,.enum_strings =
1046 "interrupt", "polling",},};
1049 u32 node_name, vector_length, is_polling;
1051 vlib_worker_thread_t *w = vlib_worker_threads + vm->thread_index;
1054 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT
1055 && v >= nm->polling_threshold_vector_length) &&
1057 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
1059 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1060 n->state = VLIB_NODE_STATE_POLLING;
1061 node->state = VLIB_NODE_STATE_POLLING;
1063 ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1065 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1066 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1067 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1069 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1070 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1072 ed->node_name = n->name_elog_string;
1073 ed->vector_length = v;
1077 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1078 && v <= nm->interrupt_threshold_vector_length)
1080 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1082 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1084 /* Switch to interrupt mode after dispatch in polling one more time.
1085 This allows driver to re-enable interrupts. */
1086 n->state = VLIB_NODE_STATE_INTERRUPT;
1087 node->state = VLIB_NODE_STATE_INTERRUPT;
1089 ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1090 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -=
1092 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] +=
1099 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1100 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1101 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1103 ed->node_name = n->name_elog_string;
1104 ed->vector_length = v;
1116 dispatch_pending_node (vlib_main_t * vm, uword pending_frame_index,
1117 u64 last_time_stamp)
1119 vlib_node_main_t *nm = &vm->node_main;
1121 vlib_next_frame_t *nf, nf_dummy;
1122 vlib_node_runtime_t *n;
1123 u32 restore_frame_index;
1124 vlib_pending_frame_t *p;
1126 /* See comment below about dangling references to nm->pending_frames */
1127 p = nm->pending_frames + pending_frame_index;
1129 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1130 p->node_runtime_index);
1132 f = vlib_get_frame (vm, p->frame_index);
1133 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1135 /* No next frame: so use dummy on stack. */
1137 nf->flags = f->flags & VLIB_NODE_FLAG_TRACE;
1138 nf->frame_index = ~p->frame_index;
1141 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1143 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
1145 /* Force allocation of new frame while current frame is being
1147 restore_frame_index = ~0;
1148 if (nf->frame_index == p->frame_index)
1150 nf->frame_index = ~0;
1151 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1152 if (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1153 restore_frame_index = p->frame_index;
1156 /* Frame must be pending. */
1157 ASSERT (f->flags & VLIB_FRAME_PENDING);
1158 ASSERT (f->n_vectors > 0);
1160 /* Copy trace flag from next frame to node.
1161 Trace flag indicates that at least one vector in the dispatched
1163 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1164 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1165 nf->flags &= ~VLIB_FRAME_TRACE;
1167 last_time_stamp = dispatch_node (vm, n,
1168 VLIB_NODE_TYPE_INTERNAL,
1169 VLIB_NODE_STATE_POLLING,
1170 f, last_time_stamp);
1172 f->flags &= ~VLIB_FRAME_PENDING;
1174 /* Frame is ready to be used again, so restore it. */
1175 if (restore_frame_index != ~0)
1178 * We musn't restore a frame that is flagged to be freed. This
1179 * shouldn't happen since frames to be freed post dispatch are
1180 * those used when the to-node frame becomes full i.e. they form a
1181 * sort of queue of frames to a single node. If we get here then
1182 * the to-node frame and the pending frame *were* the same, and so
1183 * we removed the to-node frame. Therefore this frame is no
1184 * longer part of the queue for that node and hence it cannot be
1187 ASSERT (!(f->flags & VLIB_FRAME_FREE_AFTER_DISPATCH));
1190 * NB: dispatching node n can result in the creation and scheduling
1191 * of new frames, and hence in the reallocation of nm->pending_frames.
1192 * Recompute p, or no supper. This was broken for more than 10 years.
1194 p = nm->pending_frames + pending_frame_index;
1197 * p->next_frame_index can change during node dispatch if node
1198 * function decides to change graph hook up.
1200 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1201 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1203 if (~0 == nf->frame_index)
1205 /* no new frame has been assigned to this node, use the saved one */
1206 nf->frame_index = restore_frame_index;
1211 /* The node has gained a frame, implying packets from the current frame
1212 were re-queued to this same node. we don't need the saved one
1214 vlib_frame_free (vm, n, f);
1219 if (f->flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1221 ASSERT (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1222 vlib_frame_free (vm, n, f);
1226 return last_time_stamp;
1230 vlib_process_stack_is_valid (vlib_process_t * p)
1232 return p->stack[0] == VLIB_PROCESS_STACK_MAGIC;
1238 vlib_process_t *process;
1239 vlib_frame_t *frame;
1240 } vlib_process_bootstrap_args_t;
1242 /* Called in process stack. */
1244 vlib_process_bootstrap (uword _a)
1246 vlib_process_bootstrap_args_t *a;
1248 vlib_node_runtime_t *node;
1253 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1258 node = &p->node_runtime;
1260 n = node->function (vm, node, f);
1262 ASSERT (vlib_process_stack_is_valid (p));
1264 clib_longjmp (&p->return_longjmp, n);
1269 /* Called in main stack. */
1270 static_always_inline uword
1271 vlib_process_startup (vlib_main_t * vm, vlib_process_t * p, vlib_frame_t * f)
1273 vlib_process_bootstrap_args_t a;
1280 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1281 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1282 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1283 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1288 static_always_inline uword
1289 vlib_process_resume (vlib_process_t * p)
1292 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1293 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1294 | VLIB_PROCESS_RESUME_PENDING);
1295 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1296 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1297 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1302 dispatch_process (vlib_main_t * vm,
1303 vlib_process_t * p, vlib_frame_t * f, u64 last_time_stamp)
1305 vlib_node_main_t *nm = &vm->node_main;
1306 vlib_node_runtime_t *node_runtime = &p->node_runtime;
1307 vlib_node_t *node = vlib_get_node (vm, node_runtime->node_index);
1309 uword n_vectors, is_suspend;
1311 if (node->state != VLIB_NODE_STATE_POLLING
1312 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1313 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1314 return last_time_stamp;
1316 p->flags |= VLIB_PROCESS_IS_RUNNING;
1318 t = last_time_stamp;
1319 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1320 f ? f->n_vectors : 0, /* is_after */ 0);
1322 /* Save away current process for suspend. */
1323 nm->current_process_index = node->runtime_index;
1325 n_vectors = vlib_process_startup (vm, p, f);
1327 nm->current_process_index = ~0;
1329 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1330 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1333 vlib_pending_frame_t *pf;
1336 pool_get (nm->suspended_process_frames, pf);
1337 pf->node_runtime_index = node->runtime_index;
1338 pf->frame_index = f ? vlib_frame_index (vm, f) : ~0;
1339 pf->next_frame_index = ~0;
1342 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1344 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1346 TWT (tw_timer_wheel) * tw =
1347 (TWT (tw_timer_wheel) *) nm->timing_wheel;
1348 p->stop_timer_handle =
1349 TW (tw_timer_start) (tw,
1350 vlib_timing_wheel_data_set_suspended_process
1351 (node->runtime_index) /* [sic] pool idex */ ,
1353 p->resume_clock_interval);
1357 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1359 t = clib_cpu_time_now ();
1361 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend,
1364 vlib_process_update_stats (vm, p,
1365 /* n_calls */ !is_suspend,
1366 /* n_vectors */ n_vectors,
1367 /* n_clocks */ t - last_time_stamp);
1373 vlib_start_process (vlib_main_t * vm, uword process_index)
1375 vlib_node_main_t *nm = &vm->node_main;
1376 vlib_process_t *p = vec_elt (nm->processes, process_index);
1377 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1381 dispatch_suspended_process (vlib_main_t * vm,
1382 uword process_index, u64 last_time_stamp)
1384 vlib_node_main_t *nm = &vm->node_main;
1385 vlib_node_runtime_t *node_runtime;
1389 vlib_pending_frame_t *pf;
1390 u64 t, n_vectors, is_suspend;
1392 t = last_time_stamp;
1394 p = vec_elt (nm->processes, process_index);
1395 if (PREDICT_FALSE (!(p->flags & VLIB_PROCESS_IS_RUNNING)))
1396 return last_time_stamp;
1398 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1399 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1402 pool_elt_at_index (nm->suspended_process_frames,
1403 p->suspended_process_frame_index);
1405 node_runtime = &p->node_runtime;
1406 node = vlib_get_node (vm, node_runtime->node_index);
1407 f = pf->frame_index != ~0 ? vlib_get_frame (vm, pf->frame_index) : 0;
1409 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1410 f ? f->n_vectors : 0, /* is_after */ 0);
1412 /* Save away current process for suspend. */
1413 nm->current_process_index = node->runtime_index;
1415 n_vectors = vlib_process_resume (p);
1416 t = clib_cpu_time_now ();
1418 nm->current_process_index = ~0;
1420 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1423 /* Suspend it again. */
1426 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1428 p->stop_timer_handle =
1429 TW (tw_timer_start) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1430 vlib_timing_wheel_data_set_suspended_process
1431 (node->runtime_index) /* [sic] pool idex */ ,
1433 p->resume_clock_interval);
1438 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1439 p->suspended_process_frame_index = ~0;
1440 pool_put (nm->suspended_process_frames, pf);
1443 t = clib_cpu_time_now ();
1444 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, !is_suspend,
1447 vlib_process_update_stats (vm, p,
1448 /* n_calls */ !is_suspend,
1449 /* n_vectors */ n_vectors,
1450 /* n_clocks */ t - last_time_stamp);
1455 static_always_inline void
1456 vlib_main_or_worker_loop (vlib_main_t * vm, int is_main)
1458 vlib_node_main_t *nm = &vm->node_main;
1459 vlib_thread_main_t *tm = vlib_get_thread_main ();
1462 vlib_frame_queue_main_t *fqm;
1463 u32 *last_node_runtime_indices = 0;
1465 /* Initialize pending node vector. */
1468 vec_resize (nm->pending_frames, 32);
1469 _vec_len (nm->pending_frames) = 0;
1472 /* Mark time of main loop start. */
1475 cpu_time_now = vm->clib_time.last_cpu_time;
1476 vm->cpu_time_main_loop_start = cpu_time_now;
1479 cpu_time_now = clib_cpu_time_now ();
1481 /* Pre-allocate interupt runtime indices and lock. */
1482 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1483 vec_alloc (last_node_runtime_indices, 32);
1485 clib_spinlock_init (&nm->pending_interrupt_lock);
1487 /* Pre-allocate expired nodes. */
1488 if (!nm->polling_threshold_vector_length)
1489 nm->polling_threshold_vector_length = 10;
1490 if (!nm->interrupt_threshold_vector_length)
1491 nm->interrupt_threshold_vector_length = 5;
1493 /* Start all processes. */
1497 nm->current_process_index = ~0;
1498 for (i = 0; i < vec_len (nm->processes); i++)
1499 cpu_time_now = dispatch_process (vm, nm->processes[i], /* frame */ 0,
1505 vlib_node_runtime_t *n;
1509 vlib_worker_thread_barrier_check ();
1510 vec_foreach (fqm, tm->frame_queue_mains)
1511 vlib_frame_queue_dequeue (vm, fqm);
1514 /* Process pre-input nodes. */
1516 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1517 cpu_time_now = dispatch_node (vm, n,
1518 VLIB_NODE_TYPE_PRE_INPUT,
1519 VLIB_NODE_STATE_POLLING,
1523 /* Next process input nodes. */
1524 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1525 cpu_time_now = dispatch_node (vm, n,
1526 VLIB_NODE_TYPE_INPUT,
1527 VLIB_NODE_STATE_POLLING,
1531 if (PREDICT_TRUE (is_main && vm->queue_signal_pending == 0))
1532 vm->queue_signal_callback (vm);
1534 /* Next handle interrupts. */
1536 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1542 clib_spinlock_lock (&nm->pending_interrupt_lock);
1543 tmp = nm->pending_interrupt_node_runtime_indices;
1544 nm->pending_interrupt_node_runtime_indices =
1545 last_node_runtime_indices;
1546 last_node_runtime_indices = tmp;
1547 _vec_len (last_node_runtime_indices) = 0;
1549 clib_spinlock_unlock (&nm->pending_interrupt_lock);
1550 for (i = 0; i < l; i++)
1552 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1553 last_node_runtime_indices[i]);
1555 dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
1556 VLIB_NODE_STATE_INTERRUPT,
1565 /* Check if process nodes have expired from timing wheel. */
1566 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1568 nm->data_from_advancing_timing_wheel =
1569 TW (tw_timer_expire_timers_vec)
1570 ((TWT (tw_timer_wheel) *) nm->timing_wheel, vlib_time_now (vm),
1571 nm->data_from_advancing_timing_wheel);
1573 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1576 (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1580 processes_timing_wheel_data:
1581 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel);
1584 u32 d = nm->data_from_advancing_timing_wheel[i];
1585 u32 di = vlib_timing_wheel_data_get_index (d);
1587 if (vlib_timing_wheel_data_is_timed_event (d))
1589 vlib_signal_timed_event_data_t *te =
1590 pool_elt_at_index (nm->signal_timed_event_data_pool,
1593 vlib_get_node (vm, te->process_node_index);
1595 vec_elt (nm->processes, n->runtime_index);
1598 vlib_process_signal_event_helper (nm, n, p,
1599 te->event_type_index,
1601 te->n_data_elt_bytes);
1602 if (te->n_data_bytes < sizeof (te->inline_event_data))
1603 clib_memcpy (data, te->inline_event_data,
1607 clib_memcpy (data, te->event_data_as_vector,
1609 vec_free (te->event_data_as_vector);
1611 pool_put (nm->signal_timed_event_data_pool, te);
1615 cpu_time_now = clib_cpu_time_now ();
1617 dispatch_suspended_process (vm, di, cpu_time_now);
1620 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1624 /* Input nodes may have added work to the pending vector.
1625 Process pending vector until there is nothing left.
1626 All pending vectors will be processed from input -> output. */
1627 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1628 cpu_time_now = dispatch_pending_node (vm, i, cpu_time_now);
1629 /* Reset pending vector for next iteration. */
1630 _vec_len (nm->pending_frames) = 0;
1632 /* Pending internal nodes may resume processes. */
1633 if (is_main && _vec_len (nm->data_from_advancing_timing_wheel) > 0)
1634 goto processes_timing_wheel_data;
1636 vlib_increment_main_loop_counter (vm);
1638 /* Record time stamp in case there are no enabled nodes and above
1639 calls do not update time stamp. */
1640 cpu_time_now = clib_cpu_time_now ();
1645 vlib_main_loop (vlib_main_t * vm)
1647 vlib_main_or_worker_loop (vm, /* is_main */ 1);
1651 vlib_worker_loop (vlib_main_t * vm)
1653 vlib_main_or_worker_loop (vm, /* is_main */ 0);
1656 vlib_main_t vlib_global_main;
1658 static clib_error_t *
1659 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1661 int turn_on_mem_trace = 0;
1663 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1665 if (unformat (input, "memory-trace"))
1666 turn_on_mem_trace = 1;
1668 else if (unformat (input, "elog-events %d",
1669 &vm->elog_main.event_ring_size))
1671 else if (unformat (input, "elog-post-mortem-dump"))
1672 vm->elog_post_mortem_dump = 1;
1674 return unformat_parse_error (input);
1677 unformat_free (input);
1679 /* Enable memory trace as early as possible. */
1680 if (turn_on_mem_trace)
1686 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
1689 dummy_queue_signal_callback (vlib_main_t * vm)
1693 /* Main function. */
1695 vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
1697 clib_error_t *volatile error;
1698 vlib_node_main_t *nm = &vm->node_main;
1700 vm->queue_signal_callback = dummy_queue_signal_callback;
1702 clib_time_init (&vm->clib_time);
1704 /* Turn on event log. */
1705 if (!vm->elog_main.event_ring_size)
1706 vm->elog_main.event_ring_size = 128 << 10;
1707 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
1708 elog_enable_disable (&vm->elog_main, 1);
1714 vec_validate (vm->buffer_main, 0);
1715 vlib_buffer_cb_init (vm);
1717 if ((error = vlib_thread_init (vm)))
1719 clib_error_report (error);
1723 /* Register static nodes so that init functions may use them. */
1724 vlib_register_all_static_nodes (vm);
1726 /* Set seed for random number generator.
1727 Allow user to specify seed to make random sequence deterministic. */
1728 if (!unformat (input, "seed %wd", &vm->random_seed))
1729 vm->random_seed = clib_cpu_time_now ();
1730 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
1732 /* Initialize node graph. */
1733 if ((error = vlib_node_main_init (vm)))
1735 /* Arrange for graph hook up error to not be fatal when debugging. */
1737 clib_error_report (error);
1742 /* See unix/main.c; most likely already set up */
1743 if (vm->init_functions_called == 0)
1744 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
1745 if ((error = vlib_call_all_init_functions (vm)))
1748 /* Create default buffer free list. */
1749 vlib_buffer_get_or_create_free_list (vm,
1750 VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
1753 nm->timing_wheel = clib_mem_alloc_aligned (sizeof (TWT (tw_timer_wheel)),
1754 CLIB_CACHE_LINE_BYTES);
1756 vec_validate (nm->data_from_advancing_timing_wheel, 10);
1757 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1759 /* Create the process timing wheel */
1760 TW (tw_timer_wheel_init) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1761 0 /* no callback */ ,
1762 10e-6 /* timer period 10us */ ,
1763 ~0 /* max expirations per call */ );
1765 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
1767 case VLIB_MAIN_LOOP_EXIT_NONE:
1768 vm->main_loop_exit_set = 1;
1771 case VLIB_MAIN_LOOP_EXIT_CLI:
1775 error = vm->main_loop_error;
1779 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
1782 /* Call all main loop enter functions. */
1784 clib_error_t *sub_error;
1785 sub_error = vlib_call_all_main_loop_enter_functions (vm);
1787 clib_error_report (sub_error);
1790 vlib_main_loop (vm);
1793 /* Call all exit functions. */
1795 clib_error_t *sub_error;
1796 sub_error = vlib_call_all_main_loop_exit_functions (vm);
1798 clib_error_report (sub_error);
1802 clib_error_report (error);
1808 * fd.io coding-style-patch-verification: ON
1811 * eval: (c-set-style "gnu")