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/unix.h>
47 #include <vlib/unix/cj.h>
49 CJ_GLOBAL_LOG_PROTOTYPE;
51 /* Actually allocate a few extra slots of vector data to support
52 speculative vector enqueues which overflow vector data in next frame. */
53 #define VLIB_FRAME_SIZE_ALLOC (VLIB_FRAME_SIZE + 4)
58 vlib_frame_bytes (u32 n_scalar_bytes, u32 n_vector_bytes)
62 /* Make room for vlib_frame_t plus scalar arguments. */
63 n_bytes = vlib_frame_vector_byte_offset (n_scalar_bytes);
65 /* Make room for vector arguments.
66 Allocate a few extra slots of vector data to support
67 speculative vector enqueues which overflow vector data in next frame. */
68 #define VLIB_FRAME_SIZE_EXTRA 4
69 n_bytes += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * n_vector_bytes;
71 /* Magic number is first 32bit number after vector data.
72 Used to make sure that vector data is never overrun. */
73 #define VLIB_FRAME_MAGIC (0xabadc0ed)
74 n_bytes += sizeof (u32);
76 /* Pad to cache line. */
77 n_bytes = round_pow2 (n_bytes, CLIB_CACHE_LINE_BYTES);
83 vlib_frame_find_magic (vlib_frame_t * f, vlib_node_t * node)
87 p += vlib_frame_vector_byte_offset (node->scalar_size);
89 p += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * node->vector_size;
94 static vlib_frame_size_t *
95 get_frame_size_info (vlib_node_main_t * nm,
96 u32 n_scalar_bytes, u32 n_vector_bytes)
98 uword key = (n_scalar_bytes << 16) | n_vector_bytes;
101 p = hash_get (nm->frame_size_hash, key);
106 i = vec_len (nm->frame_sizes);
107 vec_validate (nm->frame_sizes, i);
108 hash_set (nm->frame_size_hash, key, i);
111 return vec_elt_at_index (nm->frame_sizes, i);
115 vlib_frame_alloc_to_node (vlib_main_t * vm, u32 to_node_index,
118 vlib_node_main_t *nm = &vm->node_main;
119 vlib_frame_size_t *fs;
120 vlib_node_t *to_node;
122 u32 fi, l, n, scalar_size, vector_size;
124 to_node = vlib_get_node (vm, to_node_index);
126 scalar_size = to_node->scalar_size;
127 vector_size = to_node->vector_size;
129 fs = get_frame_size_info (nm, scalar_size, vector_size);
130 n = vlib_frame_bytes (scalar_size, vector_size);
131 if ((l = vec_len (fs->free_frame_indices)) > 0)
133 /* Allocate from end of free list. */
134 fi = fs->free_frame_indices[l - 1];
135 f = vlib_get_frame_no_check (vm, fi);
136 _vec_len (fs->free_frame_indices) = l - 1;
140 f = clib_mem_alloc_aligned_no_fail (n, VLIB_FRAME_ALIGN);
141 fi = vlib_frame_index_no_check (vm, f);
144 /* Poison frame when debugging. */
148 /* Insert magic number. */
152 magic = vlib_frame_find_magic (f, to_node);
153 *magic = VLIB_FRAME_MAGIC;
156 f->frame_flags = VLIB_FRAME_IS_ALLOCATED | frame_flags;
158 f->scalar_size = scalar_size;
159 f->vector_size = vector_size;
161 fs->n_alloc_frames += 1;
166 /* Allocate a frame for from FROM_NODE to TO_NODE via TO_NEXT_INDEX.
167 Returns frame index. */
169 vlib_frame_alloc (vlib_main_t * vm, vlib_node_runtime_t * from_node_runtime,
172 vlib_node_t *from_node;
174 from_node = vlib_get_node (vm, from_node_runtime->node_index);
175 ASSERT (to_next_index < vec_len (from_node->next_nodes));
177 return vlib_frame_alloc_to_node (vm, from_node->next_nodes[to_next_index],
178 /* frame_flags */ 0);
182 vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index)
184 u32 fi = vlib_frame_alloc_to_node (vm, to_node_index,
186 VLIB_FRAME_FREE_AFTER_DISPATCH);
187 return vlib_get_frame (vm, fi);
191 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->frame_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, vlib_node_runtime_t * r, vlib_frame_t * f)
213 vlib_node_main_t *nm = &vm->node_main;
215 vlib_frame_size_t *fs;
218 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
220 node = vlib_get_node (vm, r->node_index);
221 fs = get_frame_size_info (nm, node->scalar_size, node->vector_size);
223 frame_index = vlib_frame_index (vm, f);
225 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
227 /* No next frames may point to freed frame. */
230 vlib_next_frame_t *nf;
231 vec_foreach (nf, vm->node_main.next_frames)
232 ASSERT (nf->frame_index != frame_index);
235 f->frame_flags &= ~VLIB_FRAME_IS_ALLOCATED;
237 vec_add1 (fs->free_frame_indices, frame_index);
238 ASSERT (fs->n_alloc_frames > 0);
239 fs->n_alloc_frames -= 1;
242 static clib_error_t *
243 show_frame_stats (vlib_main_t * vm,
244 unformat_input_t * input, vlib_cli_command_t * cmd)
246 vlib_node_main_t *nm = &vm->node_main;
247 vlib_frame_size_t *fs;
249 vlib_cli_output (vm, "%=6s%=12s%=12s", "Size", "# Alloc", "# Free");
250 vec_foreach (fs, nm->frame_sizes)
252 u32 n_alloc = fs->n_alloc_frames;
253 u32 n_free = vec_len (fs->free_frame_indices);
255 if (n_alloc + n_free > 0)
256 vlib_cli_output (vm, "%=6d%=12d%=12d",
257 fs - nm->frame_sizes, n_alloc, n_free);
264 VLIB_CLI_COMMAND (show_frame_stats_cli, static) = {
265 .path = "show vlib frame-allocation",
266 .short_help = "Show node dispatch frame statistics",
267 .function = show_frame_stats,
271 /* Change ownership of enqueue rights to given next node. */
273 vlib_next_frame_change_ownership (vlib_main_t * vm,
274 vlib_node_runtime_t * node_runtime,
277 vlib_node_main_t *nm = &vm->node_main;
278 vlib_next_frame_t *next_frame;
279 vlib_node_t *node, *next_node;
281 node = vec_elt (nm->nodes, node_runtime->node_index);
283 /* Only internal & input nodes are allowed to call other nodes. */
284 ASSERT (node->type == VLIB_NODE_TYPE_INTERNAL
285 || node->type == VLIB_NODE_TYPE_INPUT
286 || node->type == VLIB_NODE_TYPE_PROCESS);
288 ASSERT (vec_len (node->next_nodes) == node_runtime->n_next_nodes);
291 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,
348 vlib_frame_t * f, vlib_node_t * n, uword next_index)
350 vlib_node_t *next_node = vlib_get_node (vm, n->next_nodes[next_index]);
351 u32 *magic = vlib_frame_find_magic (f, next_node);
352 ASSERT (VLIB_FRAME_MAGIC == magic[0]);
356 vlib_get_next_frame_internal (vlib_main_t * vm,
357 vlib_node_runtime_t * node,
358 u32 next_index, u32 allocate_new_next_frame)
361 vlib_next_frame_t *nf;
364 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
366 /* Make sure this next frame owns right to enqueue to destination frame. */
367 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_OWNER)))
368 vlib_next_frame_change_ownership (vm, node, next_index);
370 /* ??? Don't need valid flag: can use frame_index == ~0 */
371 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_IS_ALLOCATED)))
373 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
374 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
377 f = vlib_get_frame (vm, nf->frame_index);
379 /* Has frame been removed from pending vector (e.g. finished dispatching)?
380 If so we can reuse frame. */
381 if ((nf->flags & VLIB_FRAME_PENDING)
382 && !(f->frame_flags & VLIB_FRAME_PENDING))
384 nf->flags &= ~VLIB_FRAME_PENDING;
388 /* Allocate new frame if current one is already full. */
389 n_used = f->n_vectors;
390 if (n_used >= VLIB_FRAME_SIZE || (allocate_new_next_frame && n_used > 0))
392 /* Old frame may need to be freed after dispatch, since we'll have
393 two redundant frames from node -> next node. */
394 if (!(nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH))
396 vlib_frame_t *f_old = vlib_get_frame (vm, nf->frame_index);
397 f_old->frame_flags |= VLIB_FRAME_FREE_AFTER_DISPATCH;
400 /* Allocate new frame to replace full one. */
401 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
402 f = vlib_get_frame (vm, nf->frame_index);
403 n_used = f->n_vectors;
406 /* Should have free vectors in frame now. */
407 ASSERT (n_used < VLIB_FRAME_SIZE);
411 validate_frame_magic (vm, f,
412 vlib_get_node (vm, node->node_index), next_index);
419 vlib_put_next_frame_validate (vlib_main_t * vm,
420 vlib_node_runtime_t * rt,
421 u32 next_index, u32 n_vectors_left)
423 vlib_node_main_t *nm = &vm->node_main;
424 vlib_next_frame_t *nf;
426 vlib_node_runtime_t *next_rt;
427 vlib_node_t *next_node;
428 u32 n_before, n_after;
430 nf = vlib_node_runtime_get_next_frame (vm, rt, next_index);
431 f = vlib_get_frame (vm, nf->frame_index);
433 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
434 n_after = VLIB_FRAME_SIZE - n_vectors_left;
435 n_before = f->n_vectors;
437 ASSERT (n_after >= n_before);
439 next_rt = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
440 nf->node_runtime_index);
441 next_node = vlib_get_node (vm, next_rt->node_index);
442 if (n_after > 0 && next_node->validate_frame)
444 u8 *msg = next_node->validate_frame (vm, rt, f);
447 clib_warning ("%v", msg);
455 vlib_put_next_frame (vlib_main_t * vm,
456 vlib_node_runtime_t * r,
457 u32 next_index, u32 n_vectors_left)
459 vlib_node_main_t *nm = &vm->node_main;
460 vlib_next_frame_t *nf;
462 u32 n_vectors_in_frame;
464 if (buffer_main.callbacks_registered == 0 && CLIB_DEBUG > 0)
465 vlib_put_next_frame_validate (vm, r, next_index, n_vectors_left);
467 nf = vlib_node_runtime_get_next_frame (vm, r, next_index);
468 f = vlib_get_frame (vm, nf->frame_index);
470 /* Make sure that magic number is still there. Otherwise, caller
471 has overrun frame meta data. */
474 vlib_node_t *node = vlib_get_node (vm, r->node_index);
475 validate_frame_magic (vm, f, node, next_index);
478 /* Convert # of vectors left -> number of vectors there. */
479 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
480 n_vectors_in_frame = VLIB_FRAME_SIZE - n_vectors_left;
482 f->n_vectors = n_vectors_in_frame;
484 /* If vectors were added to frame, add to pending vector. */
485 if (PREDICT_TRUE (n_vectors_in_frame > 0))
487 vlib_pending_frame_t *p;
490 r->cached_next_index = next_index;
492 if (!(f->frame_flags & VLIB_FRAME_PENDING))
494 __attribute__ ((unused)) vlib_node_t *node;
495 vlib_node_t *next_node;
496 vlib_node_runtime_t *next_runtime;
498 node = vlib_get_node (vm, r->node_index);
499 next_node = vlib_get_next_node (vm, r->node_index, next_index);
500 next_runtime = vlib_node_get_runtime (vm, next_node->index);
502 vec_add2 (nm->pending_frames, p, 1);
504 p->frame_index = nf->frame_index;
505 p->node_runtime_index = nf->node_runtime_index;
506 p->next_frame_index = nf - nm->next_frames;
507 nf->flags |= VLIB_FRAME_PENDING;
508 f->frame_flags |= VLIB_FRAME_PENDING;
511 * If we're going to dispatch this frame on another thread,
512 * force allocation of a new frame. Otherwise, we create
513 * a dangling frame reference. Each thread has its own copy of
514 * the next_frames vector.
516 if (0 && r->thread_index != next_runtime->thread_index)
518 nf->frame_index = ~0;
519 nf->flags &= ~(VLIB_FRAME_PENDING | VLIB_FRAME_IS_ALLOCATED);
523 /* Copy trace flag from next_frame and from runtime. */
525 (nf->flags & VLIB_NODE_FLAG_TRACE) | (r->
526 flags & VLIB_NODE_FLAG_TRACE);
528 v0 = nf->vectors_since_last_overflow;
529 v1 = v0 + n_vectors_in_frame;
530 nf->vectors_since_last_overflow = v1;
531 if (PREDICT_FALSE (v1 < v0))
533 vlib_node_t *node = vlib_get_node (vm, r->node_index);
534 vec_elt (node->n_vectors_by_next_node, next_index) += v0;
539 /* Sync up runtime (32 bit counters) and main node stats (64 bit counters). */
541 vlib_node_runtime_sync_stats (vlib_main_t * vm,
542 vlib_node_runtime_t * r,
543 uword n_calls, uword n_vectors, uword n_clocks)
545 vlib_node_t *n = vlib_get_node (vm, r->node_index);
547 n->stats_total.calls += n_calls + r->calls_since_last_overflow;
548 n->stats_total.vectors += n_vectors + r->vectors_since_last_overflow;
549 n->stats_total.clocks += n_clocks + r->clocks_since_last_overflow;
550 n->stats_total.max_clock = r->max_clock;
551 n->stats_total.max_clock_n = r->max_clock_n;
553 r->calls_since_last_overflow = 0;
554 r->vectors_since_last_overflow = 0;
555 r->clocks_since_last_overflow = 0;
558 always_inline void __attribute__ ((unused))
559 vlib_process_sync_stats (vlib_main_t * vm,
561 uword n_calls, uword n_vectors, uword n_clocks)
563 vlib_node_runtime_t *rt = &p->node_runtime;
564 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
565 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks);
566 n->stats_total.suspends += p->n_suspends;
571 vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
573 vlib_node_runtime_t *rt;
575 if (n->type == VLIB_NODE_TYPE_PROCESS)
577 /* Nothing to do for PROCESS nodes except in main thread */
578 if (vm != &vlib_global_main)
581 vlib_process_t *p = vlib_get_process_from_node (vm, n);
582 n->stats_total.suspends += p->n_suspends;
584 rt = &p->node_runtime;
588 vec_elt_at_index (vm->node_main.nodes_by_type[n->type],
591 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0);
593 /* Sync up runtime next frame vector counters with main node structure. */
595 vlib_next_frame_t *nf;
597 for (i = 0; i < rt->n_next_nodes; i++)
599 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
600 vec_elt (n->n_vectors_by_next_node, i) +=
601 nf->vectors_since_last_overflow;
602 nf->vectors_since_last_overflow = 0;
608 vlib_node_runtime_update_stats (vlib_main_t * vm,
609 vlib_node_runtime_t * node,
611 uword n_vectors, uword n_clocks)
613 u32 ca0, ca1, v0, v1, cl0, cl1, r;
615 cl0 = cl1 = node->clocks_since_last_overflow;
616 ca0 = ca1 = node->calls_since_last_overflow;
617 v0 = v1 = node->vectors_since_last_overflow;
621 cl1 = cl0 + n_clocks;
623 node->calls_since_last_overflow = ca1;
624 node->clocks_since_last_overflow = cl1;
625 node->vectors_since_last_overflow = v1;
626 node->max_clock_n = node->max_clock > n_clocks ?
627 node->max_clock_n : n_vectors;
628 node->max_clock = node->max_clock > n_clocks ? node->max_clock : n_clocks;
630 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
632 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0))
634 node->calls_since_last_overflow = ca0;
635 node->clocks_since_last_overflow = cl0;
636 node->vectors_since_last_overflow = v0;
637 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks);
644 vlib_process_update_stats (vlib_main_t * vm,
646 uword n_calls, uword n_vectors, uword n_clocks)
648 vlib_node_runtime_update_stats (vm, &p->node_runtime,
649 n_calls, n_vectors, n_clocks);
652 static clib_error_t *
653 vlib_cli_elog_clear (vlib_main_t * vm,
654 unformat_input_t * input, vlib_cli_command_t * cmd)
656 elog_reset_buffer (&vm->elog_main);
661 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
662 .path = "event-logger clear",
663 .short_help = "Clear the event log",
664 .function = vlib_cli_elog_clear,
669 static clib_error_t *
670 elog_save_buffer (vlib_main_t * vm,
671 unformat_input_t * input, vlib_cli_command_t * cmd)
673 elog_main_t *em = &vm->elog_main;
674 char *file, *chroot_file;
675 clib_error_t *error = 0;
677 if (!unformat (input, "%s", &file))
679 vlib_cli_output (vm, "expected file name, got `%U'",
680 format_unformat_error, input);
684 /* It's fairly hard to get "../oopsie" through unformat; just in case */
685 if (strstr (file, "..") || index (file, '/'))
687 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
691 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
695 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
696 elog_n_events_in_buffer (em),
697 elog_buffer_capacity (em), chroot_file);
699 vlib_worker_thread_barrier_sync (vm);
700 error = elog_write_file (em, chroot_file, 1 /* flush ring */ );
701 vlib_worker_thread_barrier_release (vm);
702 vec_free (chroot_file);
707 elog_post_mortem_dump (void)
709 vlib_main_t *vm = &vlib_global_main;
710 elog_main_t *em = &vm->elog_main;
714 if (!vm->elog_post_mortem_dump)
717 filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0);
718 error = elog_write_file (em, (char *) filename, 1 /* flush ring */ );
720 clib_error_report (error);
725 VLIB_CLI_COMMAND (elog_save_cli, static) = {
726 .path = "event-logger save",
727 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
728 .function = elog_save_buffer,
732 static clib_error_t *
733 elog_stop (vlib_main_t * vm,
734 unformat_input_t * input, vlib_cli_command_t * cmd)
736 elog_main_t *em = &vm->elog_main;
738 em->n_total_events_disable_limit = em->n_total_events;
740 vlib_cli_output (vm, "Stopped the event logger...");
745 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
746 .path = "event-logger stop",
747 .short_help = "Stop the event-logger",
748 .function = elog_stop,
752 static clib_error_t *
753 elog_restart (vlib_main_t * vm,
754 unformat_input_t * input, vlib_cli_command_t * cmd)
756 elog_main_t *em = &vm->elog_main;
758 em->n_total_events_disable_limit = ~0;
760 vlib_cli_output (vm, "Restarted the event logger...");
765 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
766 .path = "event-logger restart",
767 .short_help = "Restart the event-logger",
768 .function = elog_restart,
772 static clib_error_t *
773 elog_resize (vlib_main_t * vm,
774 unformat_input_t * input, vlib_cli_command_t * cmd)
776 elog_main_t *em = &vm->elog_main;
779 /* Stop the parade */
780 elog_reset_buffer (&vm->elog_main);
782 if (unformat (input, "%d", &tmp))
784 elog_alloc (em, tmp);
785 em->n_total_events_disable_limit = ~0;
788 return clib_error_return (0, "Must specify how many events in the ring");
790 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
795 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
796 .path = "event-logger resize",
797 .short_help = "event-logger resize <nnn>",
798 .function = elog_resize,
802 #endif /* CLIB_UNIX */
805 elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
807 elog_main_t *em = &vm->elog_main;
808 elog_event_t *e, *es;
811 /* Show events in VLIB time since log clock starts after VLIB clock. */
812 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
813 * vm->clib_time.seconds_per_clock;
815 es = elog_peek_events (em);
816 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
818 em->n_total_events < em->n_total_events_disable_limit ?
819 "running" : "stopped");
822 vlib_cli_output (vm, "%18.9f: %U",
823 e->time + dt, format_elog_event, em, e);
825 if (n_events_to_show == 0)
832 static clib_error_t *
833 elog_show_buffer (vlib_main_t * vm,
834 unformat_input_t * input, vlib_cli_command_t * cmd)
836 u32 n_events_to_show;
837 clib_error_t *error = 0;
839 n_events_to_show = 250;
840 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
842 if (unformat (input, "%d", &n_events_to_show))
844 else if (unformat (input, "all"))
845 n_events_to_show = ~0;
847 return unformat_parse_error (input);
849 elog_show_buffer_internal (vm, n_events_to_show);
854 VLIB_CLI_COMMAND (elog_show_cli, static) = {
855 .path = "show event-logger",
856 .short_help = "Show event logger info",
857 .function = elog_show_buffer,
862 vlib_gdb_show_event_log (void)
864 elog_show_buffer_internal (vlib_get_main (), (u32) ~ 0);
868 vlib_elog_main_loop_event (vlib_main_t * vm,
870 u64 time, u32 n_vectors, u32 is_return)
872 vlib_main_t *evm = &vlib_global_main;
873 elog_main_t *em = &evm->elog_main;
875 if (VLIB_ELOG_MAIN_LOOP && n_vectors)
878 vec_elt_at_index (is_return
879 ? evm->node_return_elog_event_types
880 : evm->node_call_elog_event_types,
883 (vm->thread_index ? &vlib_worker_threads[vm->thread_index].
884 elog_track : &em->default_track),
885 /* data to log */ n_vectors);
888 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
889 void (*vlib_buffer_trace_trajectory_cb) (vlib_buffer_t * b, u32 node_index);
890 void (*vlib_buffer_trace_trajectory_init_cb) (vlib_buffer_t * b);
893 vlib_buffer_trace_trajectory_init (vlib_buffer_t * b)
895 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_init_cb != 0))
897 (*vlib_buffer_trace_trajectory_init_cb) (b);
904 add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
906 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
907 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_cb != 0))
909 (*vlib_buffer_trace_trajectory_cb) (b, node_index);
914 static_always_inline u64
915 dispatch_node (vlib_main_t * vm,
916 vlib_node_runtime_t * node,
917 vlib_node_type_t type,
918 vlib_node_state_t dispatch_state,
919 vlib_frame_t * frame, u64 last_time_stamp)
923 vlib_node_main_t *nm = &vm->node_main;
924 vlib_next_frame_t *nf;
928 vlib_node_t *n = vlib_get_node (vm, node->node_index);
929 ASSERT (n->type == type);
932 /* Only non-internal nodes may be disabled. */
933 if (type != VLIB_NODE_TYPE_INTERNAL && node->state != dispatch_state)
935 ASSERT (type != VLIB_NODE_TYPE_INTERNAL);
936 return last_time_stamp;
939 if ((type == VLIB_NODE_TYPE_PRE_INPUT || type == VLIB_NODE_TYPE_INPUT)
940 && dispatch_state != VLIB_NODE_STATE_INTERRUPT)
942 u32 c = node->input_main_loops_per_call;
943 /* Only call node when count reaches zero. */
946 node->input_main_loops_per_call = c - 1;
947 return last_time_stamp;
951 /* Speculatively prefetch next frames. */
952 if (node->n_next_nodes > 0)
954 nf = vec_elt_at_index (nm->next_frames, node->next_frame_index);
955 CLIB_PREFETCH (nf, 4 * sizeof (nf[0]), WRITE);
958 vm->cpu_time_last_node_dispatch = last_time_stamp;
960 if (1 /* || vm->thread_index == node->thread_index */ )
962 vlib_main_t *stat_vm;
964 stat_vm = /* vlib_mains ? vlib_mains[0] : */ vm;
966 vlib_elog_main_loop_event (vm, node->node_index,
968 frame ? frame->n_vectors : 0,
972 * Turn this on if you run into
973 * "bad monkey" contexts, and you want to know exactly
974 * which nodes they've visited... See ixge.c...
976 if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
980 from = vlib_frame_vector_args (frame);
981 for (i = 0; i < frame->n_vectors; i++)
983 vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
984 add_trajectory_trace (b, node->node_index);
986 n = node->function (vm, node, frame);
989 n = node->function (vm, node, frame);
991 t = clib_cpu_time_now ();
993 vlib_elog_main_loop_event (vm, node->node_index, t, n, /* is_after */
996 vm->main_loop_vectors_processed += n;
997 vm->main_loop_nodes_processed += n > 0;
999 v = vlib_node_runtime_update_stats (stat_vm, node,
1002 /* n_clocks */ t - last_time_stamp);
1004 /* When in interrupt mode and vector rate crosses threshold switch to
1006 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1007 || (dispatch_state == VLIB_NODE_STATE_POLLING
1009 & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE)))
1011 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1012 ELOG_TYPE_DECLARE (e) =
1014 .function = (char *) __FUNCTION__,.format =
1015 "%s vector length %d, switching to %s",.format_args =
1016 "T4i4t4",.n_enum_strings = 2,.enum_strings =
1018 "interrupt", "polling",},};
1021 u32 node_name, vector_length, is_polling;
1023 vlib_worker_thread_t *w = vlib_worker_threads + vm->thread_index;
1026 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT
1027 && v >= nm->polling_threshold_vector_length) &&
1029 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
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;
1035 ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1037 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1038 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1039 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1041 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1042 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1044 ed->node_name = n->name_elog_string;
1045 ed->vector_length = v;
1049 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1050 && v <= nm->interrupt_threshold_vector_length)
1052 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1054 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1056 /* Switch to interrupt mode after dispatch in polling one more time.
1057 This allows driver to re-enable interrupts. */
1058 n->state = VLIB_NODE_STATE_INTERRUPT;
1059 node->state = VLIB_NODE_STATE_INTERRUPT;
1061 ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1062 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -=
1064 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] +=
1071 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1072 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1073 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1075 ed->node_name = n->name_elog_string;
1076 ed->vector_length = v;
1088 dispatch_pending_node (vlib_main_t * vm, uword pending_frame_index,
1089 u64 last_time_stamp)
1091 vlib_node_main_t *nm = &vm->node_main;
1093 vlib_next_frame_t *nf, nf_dummy;
1094 vlib_node_runtime_t *n;
1095 u32 restore_frame_index;
1096 vlib_pending_frame_t *p;
1098 /* See comment below about dangling references to nm->pending_frames */
1099 p = nm->pending_frames + pending_frame_index;
1101 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1102 p->node_runtime_index);
1104 f = vlib_get_frame (vm, p->frame_index);
1105 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1107 /* No next frame: so use dummy on stack. */
1109 nf->flags = f->frame_flags & VLIB_NODE_FLAG_TRACE;
1110 nf->frame_index = ~p->frame_index;
1113 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1115 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
1117 /* Force allocation of new frame while current frame is being
1119 restore_frame_index = ~0;
1120 if (nf->frame_index == p->frame_index)
1122 nf->frame_index = ~0;
1123 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1124 if (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1125 restore_frame_index = p->frame_index;
1128 /* Frame must be pending. */
1129 ASSERT (f->frame_flags & VLIB_FRAME_PENDING);
1130 ASSERT (f->n_vectors > 0);
1132 /* Copy trace flag from next frame to node.
1133 Trace flag indicates that at least one vector in the dispatched
1135 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1136 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1137 nf->flags &= ~VLIB_FRAME_TRACE;
1139 last_time_stamp = dispatch_node (vm, n,
1140 VLIB_NODE_TYPE_INTERNAL,
1141 VLIB_NODE_STATE_POLLING,
1142 f, last_time_stamp);
1144 f->frame_flags &= ~VLIB_FRAME_PENDING;
1146 /* Frame is ready to be used again, so restore it. */
1147 if (restore_frame_index != ~0)
1150 * We musn't restore a frame that is flagged to be freed. This
1151 * shouldn't happen since frames to be freed post dispatch are
1152 * those used when the to-node frame becomes full i.e. they form a
1153 * sort of queue of frames to a single node. If we get here then
1154 * the to-node frame and the pending frame *were* the same, and so
1155 * we removed the to-node frame. Therefore this frame is no
1156 * longer part of the queue for that node and hence it cannot be
1159 ASSERT (!(f->frame_flags & VLIB_FRAME_FREE_AFTER_DISPATCH));
1162 * NB: dispatching node n can result in the creation and scheduling
1163 * of new frames, and hence in the reallocation of nm->pending_frames.
1164 * Recompute p, or no supper. This was broken for more than 10 years.
1166 p = nm->pending_frames + pending_frame_index;
1169 * p->next_frame_index can change during node dispatch if node
1170 * function decides to change graph hook up.
1172 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1173 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1175 if (~0 == nf->frame_index)
1177 /* no new frame has been assigned to this node, use the saved one */
1178 nf->frame_index = restore_frame_index;
1183 /* The node has gained a frame, implying packets from the current frame
1184 were re-queued to this same node. we don't need the saved one
1186 vlib_frame_free (vm, n, f);
1191 if (f->frame_flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1193 ASSERT (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1194 vlib_frame_free (vm, n, f);
1198 return last_time_stamp;
1202 vlib_process_stack_is_valid (vlib_process_t * p)
1204 return p->stack[0] == VLIB_PROCESS_STACK_MAGIC;
1210 vlib_process_t *process;
1211 vlib_frame_t *frame;
1212 } vlib_process_bootstrap_args_t;
1214 /* Called in process stack. */
1216 vlib_process_bootstrap (uword _a)
1218 vlib_process_bootstrap_args_t *a;
1220 vlib_node_runtime_t *node;
1225 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1230 node = &p->node_runtime;
1232 n = node->function (vm, node, f);
1234 ASSERT (vlib_process_stack_is_valid (p));
1236 clib_longjmp (&p->return_longjmp, n);
1241 /* Called in main stack. */
1242 static_always_inline uword
1243 vlib_process_startup (vlib_main_t * vm, vlib_process_t * p, vlib_frame_t * f)
1245 vlib_process_bootstrap_args_t a;
1252 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1253 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1254 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1255 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1260 static_always_inline uword
1261 vlib_process_resume (vlib_process_t * p)
1264 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1265 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1266 | VLIB_PROCESS_RESUME_PENDING);
1267 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1268 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1269 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1274 dispatch_process (vlib_main_t * vm,
1275 vlib_process_t * p, vlib_frame_t * f, u64 last_time_stamp)
1277 vlib_node_main_t *nm = &vm->node_main;
1278 vlib_node_runtime_t *node_runtime = &p->node_runtime;
1279 vlib_node_t *node = vlib_get_node (vm, node_runtime->node_index);
1280 u32 old_process_index;
1282 uword n_vectors, is_suspend;
1284 if (node->state != VLIB_NODE_STATE_POLLING
1285 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1286 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1287 return last_time_stamp;
1289 p->flags |= VLIB_PROCESS_IS_RUNNING;
1291 t = last_time_stamp;
1292 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1293 f ? f->n_vectors : 0, /* is_after */ 0);
1295 /* Save away current process for suspend. */
1296 old_process_index = nm->current_process_index;
1297 nm->current_process_index = node->runtime_index;
1299 n_vectors = vlib_process_startup (vm, p, f);
1301 nm->current_process_index = old_process_index;
1303 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1304 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1307 vlib_pending_frame_t *pf;
1310 pool_get (nm->suspended_process_frames, pf);
1311 pf->node_runtime_index = node->runtime_index;
1312 pf->frame_index = f ? vlib_frame_index (vm, f) : ~0;
1313 pf->next_frame_index = ~0;
1316 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1318 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1320 TWT (tw_timer_wheel) * tw =
1321 (TWT (tw_timer_wheel) *) nm->timing_wheel;
1322 p->stop_timer_handle =
1323 TW (tw_timer_start) (tw,
1324 vlib_timing_wheel_data_set_suspended_process
1325 (node->runtime_index) /* [sic] pool idex */ ,
1327 p->resume_clock_interval);
1331 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1333 t = clib_cpu_time_now ();
1335 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend,
1338 vlib_process_update_stats (vm, p,
1339 /* n_calls */ !is_suspend,
1340 /* n_vectors */ n_vectors,
1341 /* n_clocks */ t - last_time_stamp);
1347 vlib_start_process (vlib_main_t * vm, uword process_index)
1349 vlib_node_main_t *nm = &vm->node_main;
1350 vlib_process_t *p = vec_elt (nm->processes, process_index);
1351 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1355 dispatch_suspended_process (vlib_main_t * vm,
1356 uword process_index, u64 last_time_stamp)
1358 vlib_node_main_t *nm = &vm->node_main;
1359 vlib_node_runtime_t *node_runtime;
1363 vlib_pending_frame_t *pf;
1364 u64 t, n_vectors, is_suspend;
1366 t = last_time_stamp;
1368 p = vec_elt (nm->processes, process_index);
1369 if (PREDICT_FALSE (!(p->flags & VLIB_PROCESS_IS_RUNNING)))
1370 return last_time_stamp;
1372 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1373 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1376 pool_elt_at_index (nm->suspended_process_frames,
1377 p->suspended_process_frame_index);
1379 node_runtime = &p->node_runtime;
1380 node = vlib_get_node (vm, node_runtime->node_index);
1381 f = pf->frame_index != ~0 ? vlib_get_frame (vm, pf->frame_index) : 0;
1383 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1384 f ? f->n_vectors : 0, /* is_after */ 0);
1386 /* Save away current process for suspend. */
1387 nm->current_process_index = node->runtime_index;
1389 n_vectors = vlib_process_resume (p);
1390 t = clib_cpu_time_now ();
1392 nm->current_process_index = ~0;
1394 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1397 /* Suspend it again. */
1400 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1402 p->stop_timer_handle =
1403 TW (tw_timer_start) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1404 vlib_timing_wheel_data_set_suspended_process
1405 (node->runtime_index) /* [sic] pool idex */ ,
1407 p->resume_clock_interval);
1412 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1413 p->suspended_process_frame_index = ~0;
1414 pool_put (nm->suspended_process_frames, pf);
1417 t = clib_cpu_time_now ();
1418 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, !is_suspend,
1421 vlib_process_update_stats (vm, p,
1422 /* n_calls */ !is_suspend,
1423 /* n_vectors */ n_vectors,
1424 /* n_clocks */ t - last_time_stamp);
1429 void vl_api_send_pending_rpc_requests (vlib_main_t *) __attribute__ ((weak));
1431 vl_api_send_pending_rpc_requests (vlib_main_t * vm)
1436 static_always_inline void
1437 vlib_main_or_worker_loop (vlib_main_t * vm, int is_main)
1439 vlib_node_main_t *nm = &vm->node_main;
1440 vlib_thread_main_t *tm = vlib_get_thread_main ();
1443 vlib_frame_queue_main_t *fqm;
1444 u32 *last_node_runtime_indices = 0;
1446 /* Initialize pending node vector. */
1449 vec_resize (nm->pending_frames, 32);
1450 _vec_len (nm->pending_frames) = 0;
1453 /* Mark time of main loop start. */
1456 cpu_time_now = vm->clib_time.last_cpu_time;
1457 vm->cpu_time_main_loop_start = cpu_time_now;
1460 cpu_time_now = clib_cpu_time_now ();
1462 /* Pre-allocate interupt runtime indices and lock. */
1463 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1464 vec_alloc (last_node_runtime_indices, 32);
1466 clib_spinlock_init (&nm->pending_interrupt_lock);
1468 /* Pre-allocate expired nodes. */
1469 if (!nm->polling_threshold_vector_length)
1470 nm->polling_threshold_vector_length = 10;
1471 if (!nm->interrupt_threshold_vector_length)
1472 nm->interrupt_threshold_vector_length = 5;
1474 /* Start all processes. */
1478 nm->current_process_index = ~0;
1479 for (i = 0; i < vec_len (nm->processes); i++)
1480 cpu_time_now = dispatch_process (vm, nm->processes[i], /* frame */ 0,
1486 vlib_node_runtime_t *n;
1488 if (PREDICT_FALSE (_vec_len (vm->pending_rpc_requests) > 0))
1489 vl_api_send_pending_rpc_requests (vm);
1493 vlib_worker_thread_barrier_check ();
1494 vec_foreach (fqm, tm->frame_queue_mains)
1495 vlib_frame_queue_dequeue (vm, fqm);
1498 /* Process pre-input nodes. */
1499 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1500 cpu_time_now = dispatch_node (vm, n,
1501 VLIB_NODE_TYPE_PRE_INPUT,
1502 VLIB_NODE_STATE_POLLING,
1506 /* Next process input nodes. */
1507 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1508 cpu_time_now = dispatch_node (vm, n,
1509 VLIB_NODE_TYPE_INPUT,
1510 VLIB_NODE_STATE_POLLING,
1514 if (PREDICT_TRUE (is_main && vm->queue_signal_pending == 0))
1515 vm->queue_signal_callback (vm);
1517 /* Next handle interrupts. */
1519 /* unlocked read, for performance */
1520 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1522 if (PREDICT_FALSE (l > 0))
1527 clib_spinlock_lock (&nm->pending_interrupt_lock);
1528 /* Re-read w/ lock held, in case another thread added an item */
1529 l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1532 tmp = nm->pending_interrupt_node_runtime_indices;
1533 nm->pending_interrupt_node_runtime_indices =
1534 last_node_runtime_indices;
1535 last_node_runtime_indices = tmp;
1536 _vec_len (last_node_runtime_indices) = 0;
1538 clib_spinlock_unlock (&nm->pending_interrupt_lock);
1539 for (i = 0; i < l; i++)
1541 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1542 last_node_runtime_indices[i]);
1544 dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
1545 VLIB_NODE_STATE_INTERRUPT,
1551 /* Input nodes may have added work to the pending vector.
1552 Process pending vector until there is nothing left.
1553 All pending vectors will be processed from input -> output. */
1554 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1555 cpu_time_now = dispatch_pending_node (vm, i, cpu_time_now);
1556 /* Reset pending vector for next iteration. */
1557 _vec_len (nm->pending_frames) = 0;
1561 /* Check if process nodes have expired from timing wheel. */
1562 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1564 nm->data_from_advancing_timing_wheel =
1565 TW (tw_timer_expire_timers_vec)
1566 ((TWT (tw_timer_wheel) *) nm->timing_wheel, vlib_time_now (vm),
1567 nm->data_from_advancing_timing_wheel);
1569 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1572 (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1576 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel);
1579 u32 d = nm->data_from_advancing_timing_wheel[i];
1580 u32 di = vlib_timing_wheel_data_get_index (d);
1582 if (vlib_timing_wheel_data_is_timed_event (d))
1584 vlib_signal_timed_event_data_t *te =
1585 pool_elt_at_index (nm->signal_timed_event_data_pool,
1588 vlib_get_node (vm, te->process_node_index);
1590 vec_elt (nm->processes, n->runtime_index);
1593 vlib_process_signal_event_helper (nm, n, p,
1594 te->event_type_index,
1596 te->n_data_elt_bytes);
1597 if (te->n_data_bytes < sizeof (te->inline_event_data))
1598 clib_memcpy (data, te->inline_event_data,
1602 clib_memcpy (data, te->event_data_as_vector,
1604 vec_free (te->event_data_as_vector);
1606 pool_put (nm->signal_timed_event_data_pool, te);
1610 cpu_time_now = clib_cpu_time_now ();
1612 dispatch_suspended_process (vm, di, cpu_time_now);
1615 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1618 vlib_increment_main_loop_counter (vm);
1620 /* Record time stamp in case there are no enabled nodes and above
1621 calls do not update time stamp. */
1622 cpu_time_now = clib_cpu_time_now ();
1627 vlib_main_loop (vlib_main_t * vm)
1629 vlib_main_or_worker_loop (vm, /* is_main */ 1);
1633 vlib_worker_loop (vlib_main_t * vm)
1635 vlib_main_or_worker_loop (vm, /* is_main */ 0);
1638 vlib_main_t vlib_global_main;
1640 static clib_error_t *
1641 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1643 int turn_on_mem_trace = 0;
1645 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1647 if (unformat (input, "memory-trace"))
1648 turn_on_mem_trace = 1;
1650 else if (unformat (input, "elog-events %d",
1651 &vm->elog_main.event_ring_size))
1653 else if (unformat (input, "elog-post-mortem-dump"))
1654 vm->elog_post_mortem_dump = 1;
1656 return unformat_parse_error (input);
1659 unformat_free (input);
1661 /* Enable memory trace as early as possible. */
1662 if (turn_on_mem_trace)
1668 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
1671 dummy_queue_signal_callback (vlib_main_t * vm)
1675 #define foreach_weak_reference_stub \
1676 _(vlib_map_stat_segment_init) \
1678 _(vlibmemory_init) \
1679 _(map_api_segment_init)
1682 clib_error_t *name (vlib_main_t *vm) __attribute__((weak)); \
1683 clib_error_t *name (vlib_main_t *vm) { return 0; }
1684 foreach_weak_reference_stub;
1687 /* Main function. */
1689 vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
1691 clib_error_t *volatile error;
1692 vlib_node_main_t *nm = &vm->node_main;
1694 vm->queue_signal_callback = dummy_queue_signal_callback;
1696 clib_time_init (&vm->clib_time);
1698 /* Turn on event log. */
1699 if (!vm->elog_main.event_ring_size)
1700 vm->elog_main.event_ring_size = 128 << 10;
1701 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
1702 elog_enable_disable (&vm->elog_main, 1);
1708 if ((error = unix_physmem_init (vm)))
1710 clib_error_report (error);
1714 if ((error = vlib_buffer_main_init (vm)))
1716 clib_error_report (error);
1720 if ((error = vlib_thread_init (vm)))
1722 clib_error_report (error);
1726 if ((error = vlib_map_stat_segment_init (vm)))
1728 clib_error_report (error);
1732 /* Register static nodes so that init functions may use them. */
1733 vlib_register_all_static_nodes (vm);
1735 /* Set seed for random number generator.
1736 Allow user to specify seed to make random sequence deterministic. */
1737 if (!unformat (input, "seed %wd", &vm->random_seed))
1738 vm->random_seed = clib_cpu_time_now ();
1739 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
1741 /* Initialize node graph. */
1742 if ((error = vlib_node_main_init (vm)))
1744 /* Arrange for graph hook up error to not be fatal when debugging. */
1746 clib_error_report (error);
1751 /* Direct call / weak reference, for vlib standalone use-cases */
1752 if ((error = vpe_api_init (vm)))
1754 clib_error_report (error);
1758 if ((error = vlibmemory_init (vm)))
1760 clib_error_report (error);
1764 if ((error = map_api_segment_init (vm)))
1766 clib_error_report (error);
1770 /* See unix/main.c; most likely already set up */
1771 if (vm->init_functions_called == 0)
1772 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
1773 if ((error = vlib_call_all_init_functions (vm)))
1776 /* Create default buffer free list. */
1777 vlib_buffer_create_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
1780 nm->timing_wheel = clib_mem_alloc_aligned (sizeof (TWT (tw_timer_wheel)),
1781 CLIB_CACHE_LINE_BYTES);
1783 vec_validate (nm->data_from_advancing_timing_wheel, 10);
1784 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1786 /* Create the process timing wheel */
1787 TW (tw_timer_wheel_init) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1788 0 /* no callback */ ,
1789 10e-6 /* timer period 10us */ ,
1790 ~0 /* max expirations per call */ );
1792 vec_validate (vm->pending_rpc_requests, 0);
1793 _vec_len (vm->pending_rpc_requests) = 0;
1795 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
1797 case VLIB_MAIN_LOOP_EXIT_NONE:
1798 vm->main_loop_exit_set = 1;
1801 case VLIB_MAIN_LOOP_EXIT_CLI:
1805 error = vm->main_loop_error;
1809 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
1812 /* Call all main loop enter functions. */
1814 clib_error_t *sub_error;
1815 sub_error = vlib_call_all_main_loop_enter_functions (vm);
1817 clib_error_report (sub_error);
1820 vlib_main_loop (vm);
1823 /* Call all exit functions. */
1825 clib_error_t *sub_error;
1826 sub_error = vlib_call_all_main_loop_exit_functions (vm);
1828 clib_error_report (sub_error);
1832 clib_error_report (error);
1838 * fd.io coding-style-patch-verification: ON
1841 * eval: (c-set-style "gnu")