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->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->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->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->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->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) && !(f->flags & VLIB_FRAME_PENDING))
383 nf->flags &= ~VLIB_FRAME_PENDING;
387 /* Allocate new frame if current one is already full. */
388 n_used = f->n_vectors;
389 if (n_used >= VLIB_FRAME_SIZE || (allocate_new_next_frame && n_used > 0))
391 /* Old frame may need to be freed after dispatch, since we'll have
392 two redundant frames from node -> next node. */
393 if (!(nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH))
395 vlib_frame_t *f_old = vlib_get_frame (vm, nf->frame_index);
396 f_old->flags |= VLIB_FRAME_FREE_AFTER_DISPATCH;
399 /* Allocate new frame to replace full one. */
400 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
401 f = vlib_get_frame (vm, nf->frame_index);
402 n_used = f->n_vectors;
405 /* Should have free vectors in frame now. */
406 ASSERT (n_used < VLIB_FRAME_SIZE);
410 validate_frame_magic (vm, f,
411 vlib_get_node (vm, node->node_index), next_index);
418 vlib_put_next_frame_validate (vlib_main_t * vm,
419 vlib_node_runtime_t * rt,
420 u32 next_index, u32 n_vectors_left)
422 vlib_node_main_t *nm = &vm->node_main;
423 vlib_next_frame_t *nf;
425 vlib_node_runtime_t *next_rt;
426 vlib_node_t *next_node;
427 u32 n_before, n_after;
429 nf = vlib_node_runtime_get_next_frame (vm, rt, next_index);
430 f = vlib_get_frame (vm, nf->frame_index);
432 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
433 n_after = VLIB_FRAME_SIZE - n_vectors_left;
434 n_before = f->n_vectors;
436 ASSERT (n_after >= n_before);
438 next_rt = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
439 nf->node_runtime_index);
440 next_node = vlib_get_node (vm, next_rt->node_index);
441 if (n_after > 0 && next_node->validate_frame)
443 u8 *msg = next_node->validate_frame (vm, rt, f);
446 clib_warning ("%v", msg);
454 vlib_put_next_frame (vlib_main_t * vm,
455 vlib_node_runtime_t * r,
456 u32 next_index, u32 n_vectors_left)
458 vlib_node_main_t *nm = &vm->node_main;
459 vlib_next_frame_t *nf;
461 u32 n_vectors_in_frame;
463 if (buffer_main.callbacks_registered == 0 && CLIB_DEBUG > 0)
464 vlib_put_next_frame_validate (vm, r, next_index, n_vectors_left);
466 nf = vlib_node_runtime_get_next_frame (vm, r, next_index);
467 f = vlib_get_frame (vm, nf->frame_index);
469 /* Make sure that magic number is still there. Otherwise, caller
470 has overrun frame meta data. */
473 vlib_node_t *node = vlib_get_node (vm, r->node_index);
474 validate_frame_magic (vm, f, node, next_index);
477 /* Convert # of vectors left -> number of vectors there. */
478 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
479 n_vectors_in_frame = VLIB_FRAME_SIZE - n_vectors_left;
481 f->n_vectors = n_vectors_in_frame;
483 /* If vectors were added to frame, add to pending vector. */
484 if (PREDICT_TRUE (n_vectors_in_frame > 0))
486 vlib_pending_frame_t *p;
489 r->cached_next_index = next_index;
491 if (!(f->flags & VLIB_FRAME_PENDING))
493 __attribute__ ((unused)) vlib_node_t *node;
494 vlib_node_t *next_node;
495 vlib_node_runtime_t *next_runtime;
497 node = vlib_get_node (vm, r->node_index);
498 next_node = vlib_get_next_node (vm, r->node_index, next_index);
499 next_runtime = vlib_node_get_runtime (vm, next_node->index);
501 vec_add2 (nm->pending_frames, p, 1);
503 p->frame_index = nf->frame_index;
504 p->node_runtime_index = nf->node_runtime_index;
505 p->next_frame_index = nf - nm->next_frames;
506 nf->flags |= VLIB_FRAME_PENDING;
507 f->flags |= VLIB_FRAME_PENDING;
510 * If we're going to dispatch this frame on another thread,
511 * force allocation of a new frame. Otherwise, we create
512 * a dangling frame reference. Each thread has its own copy of
513 * the next_frames vector.
515 if (0 && r->thread_index != next_runtime->thread_index)
517 nf->frame_index = ~0;
518 nf->flags &= ~(VLIB_FRAME_PENDING | VLIB_FRAME_IS_ALLOCATED);
522 /* Copy trace flag from next_frame and from runtime. */
524 (nf->flags & VLIB_NODE_FLAG_TRACE) | (r->
525 flags & VLIB_NODE_FLAG_TRACE);
527 v0 = nf->vectors_since_last_overflow;
528 v1 = v0 + n_vectors_in_frame;
529 nf->vectors_since_last_overflow = v1;
530 if (PREDICT_FALSE (v1 < v0))
532 vlib_node_t *node = vlib_get_node (vm, r->node_index);
533 vec_elt (node->n_vectors_by_next_node, next_index) += v0;
538 /* Sync up runtime (32 bit counters) and main node stats (64 bit counters). */
540 vlib_node_runtime_sync_stats (vlib_main_t * vm,
541 vlib_node_runtime_t * r,
542 uword n_calls, uword n_vectors, uword n_clocks)
544 vlib_node_t *n = vlib_get_node (vm, r->node_index);
546 n->stats_total.calls += n_calls + r->calls_since_last_overflow;
547 n->stats_total.vectors += n_vectors + r->vectors_since_last_overflow;
548 n->stats_total.clocks += n_clocks + r->clocks_since_last_overflow;
549 n->stats_total.max_clock = r->max_clock;
550 n->stats_total.max_clock_n = r->max_clock_n;
552 r->calls_since_last_overflow = 0;
553 r->vectors_since_last_overflow = 0;
554 r->clocks_since_last_overflow = 0;
557 always_inline void __attribute__ ((unused))
558 vlib_process_sync_stats (vlib_main_t * vm,
560 uword n_calls, uword n_vectors, uword n_clocks)
562 vlib_node_runtime_t *rt = &p->node_runtime;
563 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
564 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks);
565 n->stats_total.suspends += p->n_suspends;
570 vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
572 vlib_node_runtime_t *rt;
574 if (n->type == VLIB_NODE_TYPE_PROCESS)
576 /* Nothing to do for PROCESS nodes except in main thread */
577 if (vm != &vlib_global_main)
580 vlib_process_t *p = vlib_get_process_from_node (vm, n);
581 n->stats_total.suspends += p->n_suspends;
583 rt = &p->node_runtime;
587 vec_elt_at_index (vm->node_main.nodes_by_type[n->type],
590 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0);
592 /* Sync up runtime next frame vector counters with main node structure. */
594 vlib_next_frame_t *nf;
596 for (i = 0; i < rt->n_next_nodes; i++)
598 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
599 vec_elt (n->n_vectors_by_next_node, i) +=
600 nf->vectors_since_last_overflow;
601 nf->vectors_since_last_overflow = 0;
607 vlib_node_runtime_update_stats (vlib_main_t * vm,
608 vlib_node_runtime_t * node,
610 uword n_vectors, uword n_clocks)
612 u32 ca0, ca1, v0, v1, cl0, cl1, r;
614 cl0 = cl1 = node->clocks_since_last_overflow;
615 ca0 = ca1 = node->calls_since_last_overflow;
616 v0 = v1 = node->vectors_since_last_overflow;
620 cl1 = cl0 + n_clocks;
622 node->calls_since_last_overflow = ca1;
623 node->clocks_since_last_overflow = cl1;
624 node->vectors_since_last_overflow = v1;
625 node->max_clock_n = node->max_clock > n_clocks ?
626 node->max_clock_n : n_vectors;
627 node->max_clock = node->max_clock > n_clocks ? node->max_clock : n_clocks;
629 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
631 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0))
633 node->calls_since_last_overflow = ca0;
634 node->clocks_since_last_overflow = cl0;
635 node->vectors_since_last_overflow = v0;
636 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks);
643 vlib_process_update_stats (vlib_main_t * vm,
645 uword n_calls, uword n_vectors, uword n_clocks)
647 vlib_node_runtime_update_stats (vm, &p->node_runtime,
648 n_calls, n_vectors, n_clocks);
651 static clib_error_t *
652 vlib_cli_elog_clear (vlib_main_t * vm,
653 unformat_input_t * input, vlib_cli_command_t * cmd)
655 elog_reset_buffer (&vm->elog_main);
660 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
661 .path = "event-logger clear",
662 .short_help = "Clear the event log",
663 .function = vlib_cli_elog_clear,
668 static clib_error_t *
669 elog_save_buffer (vlib_main_t * vm,
670 unformat_input_t * input, vlib_cli_command_t * cmd)
672 elog_main_t *em = &vm->elog_main;
673 char *file, *chroot_file;
674 clib_error_t *error = 0;
676 if (!unformat (input, "%s", &file))
678 vlib_cli_output (vm, "expected file name, got `%U'",
679 format_unformat_error, input);
683 /* It's fairly hard to get "../oopsie" through unformat; just in case */
684 if (strstr (file, "..") || index (file, '/'))
686 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
690 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
694 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
695 elog_n_events_in_buffer (em),
696 elog_buffer_capacity (em), chroot_file);
698 vlib_worker_thread_barrier_sync (vm);
699 error = elog_write_file (em, chroot_file, 1 /* flush ring */ );
700 vlib_worker_thread_barrier_release (vm);
701 vec_free (chroot_file);
706 elog_post_mortem_dump (void)
708 vlib_main_t *vm = &vlib_global_main;
709 elog_main_t *em = &vm->elog_main;
713 if (!vm->elog_post_mortem_dump)
716 filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0);
717 error = elog_write_file (em, (char *) filename, 1 /* flush ring */ );
719 clib_error_report (error);
724 VLIB_CLI_COMMAND (elog_save_cli, static) = {
725 .path = "event-logger save",
726 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
727 .function = elog_save_buffer,
731 static clib_error_t *
732 elog_stop (vlib_main_t * vm,
733 unformat_input_t * input, vlib_cli_command_t * cmd)
735 elog_main_t *em = &vm->elog_main;
737 em->n_total_events_disable_limit = em->n_total_events;
739 vlib_cli_output (vm, "Stopped the event logger...");
744 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
745 .path = "event-logger stop",
746 .short_help = "Stop the event-logger",
747 .function = elog_stop,
751 static clib_error_t *
752 elog_restart (vlib_main_t * vm,
753 unformat_input_t * input, vlib_cli_command_t * cmd)
755 elog_main_t *em = &vm->elog_main;
757 em->n_total_events_disable_limit = ~0;
759 vlib_cli_output (vm, "Restarted the event logger...");
764 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
765 .path = "event-logger restart",
766 .short_help = "Restart the event-logger",
767 .function = elog_restart,
771 static clib_error_t *
772 elog_resize (vlib_main_t * vm,
773 unformat_input_t * input, vlib_cli_command_t * cmd)
775 elog_main_t *em = &vm->elog_main;
778 /* Stop the parade */
779 elog_reset_buffer (&vm->elog_main);
781 if (unformat (input, "%d", &tmp))
783 elog_alloc (em, tmp);
784 em->n_total_events_disable_limit = ~0;
787 return clib_error_return (0, "Must specify how many events in the ring");
789 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
794 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
795 .path = "event-logger resize",
796 .short_help = "event-logger resize <nnn>",
797 .function = elog_resize,
801 #endif /* CLIB_UNIX */
804 elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
806 elog_main_t *em = &vm->elog_main;
807 elog_event_t *e, *es;
810 /* Show events in VLIB time since log clock starts after VLIB clock. */
811 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
812 * vm->clib_time.seconds_per_clock;
814 es = elog_peek_events (em);
815 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
817 em->n_total_events < em->n_total_events_disable_limit ?
818 "running" : "stopped");
821 vlib_cli_output (vm, "%18.9f: %U",
822 e->time + dt, format_elog_event, em, e);
824 if (n_events_to_show == 0)
831 static clib_error_t *
832 elog_show_buffer (vlib_main_t * vm,
833 unformat_input_t * input, vlib_cli_command_t * cmd)
835 u32 n_events_to_show;
836 clib_error_t *error = 0;
838 n_events_to_show = 250;
839 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
841 if (unformat (input, "%d", &n_events_to_show))
843 else if (unformat (input, "all"))
844 n_events_to_show = ~0;
846 return unformat_parse_error (input);
848 elog_show_buffer_internal (vm, n_events_to_show);
853 VLIB_CLI_COMMAND (elog_show_cli, static) = {
854 .path = "show event-logger",
855 .short_help = "Show event logger info",
856 .function = elog_show_buffer,
861 vlib_gdb_show_event_log (void)
863 elog_show_buffer_internal (vlib_get_main (), (u32) ~ 0);
867 vlib_elog_main_loop_event (vlib_main_t * vm,
869 u64 time, u32 n_vectors, u32 is_return)
871 vlib_main_t *evm = &vlib_global_main;
872 elog_main_t *em = &evm->elog_main;
874 if (VLIB_ELOG_MAIN_LOOP && n_vectors)
877 vec_elt_at_index (is_return
878 ? evm->node_return_elog_event_types
879 : evm->node_call_elog_event_types,
882 (vm->thread_index ? &vlib_worker_threads[vm->thread_index].
883 elog_track : &em->default_track),
884 /* data to log */ n_vectors);
887 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
888 void (*vlib_buffer_trace_trajectory_cb) (vlib_buffer_t * b, u32 node_index);
889 void (*vlib_buffer_trace_trajectory_init_cb) (vlib_buffer_t * b);
892 vlib_buffer_trace_trajectory_init (vlib_buffer_t * b)
894 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_init_cb != 0))
896 (*vlib_buffer_trace_trajectory_init_cb) (b);
903 add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
905 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
906 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_cb != 0))
908 (*vlib_buffer_trace_trajectory_cb) (b, node_index);
913 static_always_inline u64
914 dispatch_node (vlib_main_t * vm,
915 vlib_node_runtime_t * node,
916 vlib_node_type_t type,
917 vlib_node_state_t dispatch_state,
918 vlib_frame_t * frame, u64 last_time_stamp)
922 vlib_node_main_t *nm = &vm->node_main;
923 vlib_next_frame_t *nf;
927 vlib_node_t *n = vlib_get_node (vm, node->node_index);
928 ASSERT (n->type == type);
931 /* Only non-internal nodes may be disabled. */
932 if (type != VLIB_NODE_TYPE_INTERNAL && node->state != dispatch_state)
934 ASSERT (type != VLIB_NODE_TYPE_INTERNAL);
935 return last_time_stamp;
938 if ((type == VLIB_NODE_TYPE_PRE_INPUT || type == VLIB_NODE_TYPE_INPUT)
939 && dispatch_state != VLIB_NODE_STATE_INTERRUPT)
941 u32 c = node->input_main_loops_per_call;
942 /* Only call node when count reaches zero. */
945 node->input_main_loops_per_call = c - 1;
946 return last_time_stamp;
950 /* Speculatively prefetch next frames. */
951 if (node->n_next_nodes > 0)
953 nf = vec_elt_at_index (nm->next_frames, node->next_frame_index);
954 CLIB_PREFETCH (nf, 4 * sizeof (nf[0]), WRITE);
957 vm->cpu_time_last_node_dispatch = last_time_stamp;
959 if (1 /* || vm->thread_index == node->thread_index */ )
961 vlib_main_t *stat_vm;
963 stat_vm = /* vlib_mains ? vlib_mains[0] : */ vm;
965 vlib_elog_main_loop_event (vm, node->node_index,
967 frame ? frame->n_vectors : 0,
971 * Turn this on if you run into
972 * "bad monkey" contexts, and you want to know exactly
973 * which nodes they've visited... See ixge.c...
975 if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
979 from = vlib_frame_vector_args (frame);
980 for (i = 0; i < frame->n_vectors; i++)
982 vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
983 add_trajectory_trace (b, node->node_index);
985 n = node->function (vm, node, frame);
988 n = node->function (vm, node, frame);
990 t = clib_cpu_time_now ();
992 vlib_elog_main_loop_event (vm, node->node_index, t, n, /* is_after */
995 vm->main_loop_vectors_processed += n;
996 vm->main_loop_nodes_processed += n > 0;
998 v = vlib_node_runtime_update_stats (stat_vm, node,
1001 /* n_clocks */ t - last_time_stamp);
1003 /* When in interrupt mode and vector rate crosses threshold switch to
1005 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1006 || (dispatch_state == VLIB_NODE_STATE_POLLING
1008 & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE)))
1010 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1011 ELOG_TYPE_DECLARE (e) =
1013 .function = (char *) __FUNCTION__,.format =
1014 "%s vector length %d, switching to %s",.format_args =
1015 "T4i4t4",.n_enum_strings = 2,.enum_strings =
1017 "interrupt", "polling",},};
1020 u32 node_name, vector_length, is_polling;
1022 vlib_worker_thread_t *w = vlib_worker_threads + vm->thread_index;
1025 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT
1026 && v >= nm->polling_threshold_vector_length) &&
1028 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
1030 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1031 n->state = VLIB_NODE_STATE_POLLING;
1032 node->state = VLIB_NODE_STATE_POLLING;
1034 ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1036 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1037 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1038 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1040 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1041 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1043 ed->node_name = n->name_elog_string;
1044 ed->vector_length = v;
1048 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1049 && v <= nm->interrupt_threshold_vector_length)
1051 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1053 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1055 /* Switch to interrupt mode after dispatch in polling one more time.
1056 This allows driver to re-enable interrupts. */
1057 n->state = VLIB_NODE_STATE_INTERRUPT;
1058 node->state = VLIB_NODE_STATE_INTERRUPT;
1060 ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1061 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -=
1063 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] +=
1070 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1071 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1072 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1074 ed->node_name = n->name_elog_string;
1075 ed->vector_length = v;
1087 dispatch_pending_node (vlib_main_t * vm, uword pending_frame_index,
1088 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;
1095 vlib_pending_frame_t *p;
1097 /* See comment below about dangling references to nm->pending_frames */
1098 p = nm->pending_frames + pending_frame_index;
1100 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1101 p->node_runtime_index);
1103 f = vlib_get_frame (vm, p->frame_index);
1104 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1106 /* No next frame: so use dummy on stack. */
1108 nf->flags = f->flags & VLIB_NODE_FLAG_TRACE;
1109 nf->frame_index = ~p->frame_index;
1112 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1114 ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
1116 /* Force allocation of new frame while current frame is being
1118 restore_frame_index = ~0;
1119 if (nf->frame_index == p->frame_index)
1121 nf->frame_index = ~0;
1122 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1123 if (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1124 restore_frame_index = p->frame_index;
1127 /* Frame must be pending. */
1128 ASSERT (f->flags & VLIB_FRAME_PENDING);
1129 ASSERT (f->n_vectors > 0);
1131 /* Copy trace flag from next frame to node.
1132 Trace flag indicates that at least one vector in the dispatched
1134 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1135 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1136 nf->flags &= ~VLIB_FRAME_TRACE;
1138 last_time_stamp = dispatch_node (vm, n,
1139 VLIB_NODE_TYPE_INTERNAL,
1140 VLIB_NODE_STATE_POLLING,
1141 f, last_time_stamp);
1143 f->flags &= ~VLIB_FRAME_PENDING;
1145 /* Frame is ready to be used again, so restore it. */
1146 if (restore_frame_index != ~0)
1149 * We musn't restore a frame that is flagged to be freed. This
1150 * shouldn't happen since frames to be freed post dispatch are
1151 * those used when the to-node frame becomes full i.e. they form a
1152 * sort of queue of frames to a single node. If we get here then
1153 * the to-node frame and the pending frame *were* the same, and so
1154 * we removed the to-node frame. Therefore this frame is no
1155 * longer part of the queue for that node and hence it cannot be
1158 ASSERT (!(f->flags & VLIB_FRAME_FREE_AFTER_DISPATCH));
1161 * NB: dispatching node n can result in the creation and scheduling
1162 * of new frames, and hence in the reallocation of nm->pending_frames.
1163 * Recompute p, or no supper. This was broken for more than 10 years.
1165 p = nm->pending_frames + pending_frame_index;
1168 * p->next_frame_index can change during node dispatch if node
1169 * function decides to change graph hook up.
1171 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1172 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1174 if (~0 == nf->frame_index)
1176 /* no new frame has been assigned to this node, use the saved one */
1177 nf->frame_index = restore_frame_index;
1182 /* The node has gained a frame, implying packets from the current frame
1183 were re-queued to this same node. we don't need the saved one
1185 vlib_frame_free (vm, n, f);
1190 if (f->flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1192 ASSERT (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1193 vlib_frame_free (vm, n, f);
1197 return last_time_stamp;
1201 vlib_process_stack_is_valid (vlib_process_t * p)
1203 return p->stack[0] == VLIB_PROCESS_STACK_MAGIC;
1209 vlib_process_t *process;
1210 vlib_frame_t *frame;
1211 } vlib_process_bootstrap_args_t;
1213 /* Called in process stack. */
1215 vlib_process_bootstrap (uword _a)
1217 vlib_process_bootstrap_args_t *a;
1219 vlib_node_runtime_t *node;
1224 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1229 node = &p->node_runtime;
1231 n = node->function (vm, node, f);
1233 ASSERT (vlib_process_stack_is_valid (p));
1235 clib_longjmp (&p->return_longjmp, n);
1240 /* Called in main stack. */
1241 static_always_inline uword
1242 vlib_process_startup (vlib_main_t * vm, vlib_process_t * p, vlib_frame_t * f)
1244 vlib_process_bootstrap_args_t a;
1251 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1252 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1253 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1254 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1259 static_always_inline uword
1260 vlib_process_resume (vlib_process_t * p)
1263 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1264 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1265 | VLIB_PROCESS_RESUME_PENDING);
1266 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1267 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1268 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1273 dispatch_process (vlib_main_t * vm,
1274 vlib_process_t * p, vlib_frame_t * f, u64 last_time_stamp)
1276 vlib_node_main_t *nm = &vm->node_main;
1277 vlib_node_runtime_t *node_runtime = &p->node_runtime;
1278 vlib_node_t *node = vlib_get_node (vm, node_runtime->node_index);
1279 u32 old_process_index;
1281 uword n_vectors, is_suspend;
1283 if (node->state != VLIB_NODE_STATE_POLLING
1284 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1285 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1286 return last_time_stamp;
1288 p->flags |= VLIB_PROCESS_IS_RUNNING;
1290 t = last_time_stamp;
1291 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1292 f ? f->n_vectors : 0, /* is_after */ 0);
1294 /* Save away current process for suspend. */
1295 old_process_index = nm->current_process_index;
1296 nm->current_process_index = node->runtime_index;
1298 n_vectors = vlib_process_startup (vm, p, f);
1300 nm->current_process_index = old_process_index;
1302 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1303 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1306 vlib_pending_frame_t *pf;
1309 pool_get (nm->suspended_process_frames, pf);
1310 pf->node_runtime_index = node->runtime_index;
1311 pf->frame_index = f ? vlib_frame_index (vm, f) : ~0;
1312 pf->next_frame_index = ~0;
1315 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1317 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1319 TWT (tw_timer_wheel) * tw =
1320 (TWT (tw_timer_wheel) *) nm->timing_wheel;
1321 p->stop_timer_handle =
1322 TW (tw_timer_start) (tw,
1323 vlib_timing_wheel_data_set_suspended_process
1324 (node->runtime_index) /* [sic] pool idex */ ,
1326 p->resume_clock_interval);
1330 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1332 t = clib_cpu_time_now ();
1334 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend,
1337 vlib_process_update_stats (vm, p,
1338 /* n_calls */ !is_suspend,
1339 /* n_vectors */ n_vectors,
1340 /* n_clocks */ t - last_time_stamp);
1346 vlib_start_process (vlib_main_t * vm, uword process_index)
1348 vlib_node_main_t *nm = &vm->node_main;
1349 vlib_process_t *p = vec_elt (nm->processes, process_index);
1350 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1354 dispatch_suspended_process (vlib_main_t * vm,
1355 uword process_index, u64 last_time_stamp)
1357 vlib_node_main_t *nm = &vm->node_main;
1358 vlib_node_runtime_t *node_runtime;
1362 vlib_pending_frame_t *pf;
1363 u64 t, n_vectors, is_suspend;
1365 t = last_time_stamp;
1367 p = vec_elt (nm->processes, process_index);
1368 if (PREDICT_FALSE (!(p->flags & VLIB_PROCESS_IS_RUNNING)))
1369 return last_time_stamp;
1371 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1372 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1375 pool_elt_at_index (nm->suspended_process_frames,
1376 p->suspended_process_frame_index);
1378 node_runtime = &p->node_runtime;
1379 node = vlib_get_node (vm, node_runtime->node_index);
1380 f = pf->frame_index != ~0 ? vlib_get_frame (vm, pf->frame_index) : 0;
1382 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1383 f ? f->n_vectors : 0, /* is_after */ 0);
1385 /* Save away current process for suspend. */
1386 nm->current_process_index = node->runtime_index;
1388 n_vectors = vlib_process_resume (p);
1389 t = clib_cpu_time_now ();
1391 nm->current_process_index = ~0;
1393 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1396 /* Suspend it again. */
1399 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1401 p->stop_timer_handle =
1402 TW (tw_timer_start) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1403 vlib_timing_wheel_data_set_suspended_process
1404 (node->runtime_index) /* [sic] pool idex */ ,
1406 p->resume_clock_interval);
1411 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1412 p->suspended_process_frame_index = ~0;
1413 pool_put (nm->suspended_process_frames, pf);
1416 t = clib_cpu_time_now ();
1417 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, !is_suspend,
1420 vlib_process_update_stats (vm, p,
1421 /* n_calls */ !is_suspend,
1422 /* n_vectors */ n_vectors,
1423 /* n_clocks */ t - last_time_stamp);
1428 void vl_api_send_pending_rpc_requests (vlib_main_t *) __attribute__ ((weak));
1430 vl_api_send_pending_rpc_requests (vlib_main_t * vm)
1435 static_always_inline void
1436 vlib_main_or_worker_loop (vlib_main_t * vm, int is_main)
1438 vlib_node_main_t *nm = &vm->node_main;
1439 vlib_thread_main_t *tm = vlib_get_thread_main ();
1442 vlib_frame_queue_main_t *fqm;
1443 u32 *last_node_runtime_indices = 0;
1445 /* Initialize pending node vector. */
1448 vec_resize (nm->pending_frames, 32);
1449 _vec_len (nm->pending_frames) = 0;
1452 /* Mark time of main loop start. */
1455 cpu_time_now = vm->clib_time.last_cpu_time;
1456 vm->cpu_time_main_loop_start = cpu_time_now;
1459 cpu_time_now = clib_cpu_time_now ();
1461 /* Pre-allocate interupt runtime indices and lock. */
1462 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1463 vec_alloc (last_node_runtime_indices, 32);
1465 clib_spinlock_init (&nm->pending_interrupt_lock);
1467 /* Pre-allocate expired nodes. */
1468 if (!nm->polling_threshold_vector_length)
1469 nm->polling_threshold_vector_length = 10;
1470 if (!nm->interrupt_threshold_vector_length)
1471 nm->interrupt_threshold_vector_length = 5;
1473 /* Start all processes. */
1477 nm->current_process_index = ~0;
1478 for (i = 0; i < vec_len (nm->processes); i++)
1479 cpu_time_now = dispatch_process (vm, nm->processes[i], /* frame */ 0,
1485 vlib_node_runtime_t *n;
1487 if (PREDICT_FALSE (_vec_len (vm->pending_rpc_requests) > 0))
1488 vl_api_send_pending_rpc_requests (vm);
1492 vlib_worker_thread_barrier_check ();
1493 vec_foreach (fqm, tm->frame_queue_mains)
1494 vlib_frame_queue_dequeue (vm, fqm);
1497 /* Process pre-input nodes. */
1498 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1499 cpu_time_now = dispatch_node (vm, n,
1500 VLIB_NODE_TYPE_PRE_INPUT,
1501 VLIB_NODE_STATE_POLLING,
1505 /* Next process input nodes. */
1506 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1507 cpu_time_now = dispatch_node (vm, n,
1508 VLIB_NODE_TYPE_INPUT,
1509 VLIB_NODE_STATE_POLLING,
1513 if (PREDICT_TRUE (is_main && vm->queue_signal_pending == 0))
1514 vm->queue_signal_callback (vm);
1516 /* Next handle interrupts. */
1518 /* unlocked read, for performance */
1519 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1521 if (PREDICT_FALSE (l > 0))
1526 clib_spinlock_lock (&nm->pending_interrupt_lock);
1527 /* Re-read w/ lock held, in case another thread added an item */
1528 l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1531 tmp = nm->pending_interrupt_node_runtime_indices;
1532 nm->pending_interrupt_node_runtime_indices =
1533 last_node_runtime_indices;
1534 last_node_runtime_indices = tmp;
1535 _vec_len (last_node_runtime_indices) = 0;
1537 clib_spinlock_unlock (&nm->pending_interrupt_lock);
1538 for (i = 0; i < l; i++)
1540 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1541 last_node_runtime_indices[i]);
1543 dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
1544 VLIB_NODE_STATE_INTERRUPT,
1550 /* Input nodes may have added work to the pending vector.
1551 Process pending vector until there is nothing left.
1552 All pending vectors will be processed from input -> output. */
1553 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1554 cpu_time_now = dispatch_pending_node (vm, i, cpu_time_now);
1555 /* Reset pending vector for next iteration. */
1556 _vec_len (nm->pending_frames) = 0;
1560 /* Check if process nodes have expired from timing wheel. */
1561 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1563 nm->data_from_advancing_timing_wheel =
1564 TW (tw_timer_expire_timers_vec)
1565 ((TWT (tw_timer_wheel) *) nm->timing_wheel, vlib_time_now (vm),
1566 nm->data_from_advancing_timing_wheel);
1568 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1571 (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1575 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel);
1578 u32 d = nm->data_from_advancing_timing_wheel[i];
1579 u32 di = vlib_timing_wheel_data_get_index (d);
1581 if (vlib_timing_wheel_data_is_timed_event (d))
1583 vlib_signal_timed_event_data_t *te =
1584 pool_elt_at_index (nm->signal_timed_event_data_pool,
1587 vlib_get_node (vm, te->process_node_index);
1589 vec_elt (nm->processes, n->runtime_index);
1592 vlib_process_signal_event_helper (nm, n, p,
1593 te->event_type_index,
1595 te->n_data_elt_bytes);
1596 if (te->n_data_bytes < sizeof (te->inline_event_data))
1597 clib_memcpy (data, te->inline_event_data,
1601 clib_memcpy (data, te->event_data_as_vector,
1603 vec_free (te->event_data_as_vector);
1605 pool_put (nm->signal_timed_event_data_pool, te);
1609 cpu_time_now = clib_cpu_time_now ();
1611 dispatch_suspended_process (vm, di, cpu_time_now);
1614 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1617 vlib_increment_main_loop_counter (vm);
1619 /* Record time stamp in case there are no enabled nodes and above
1620 calls do not update time stamp. */
1621 cpu_time_now = clib_cpu_time_now ();
1626 vlib_main_loop (vlib_main_t * vm)
1628 vlib_main_or_worker_loop (vm, /* is_main */ 1);
1632 vlib_worker_loop (vlib_main_t * vm)
1634 vlib_main_or_worker_loop (vm, /* is_main */ 0);
1637 vlib_main_t vlib_global_main;
1639 static clib_error_t *
1640 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1642 int turn_on_mem_trace = 0;
1644 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1646 if (unformat (input, "memory-trace"))
1647 turn_on_mem_trace = 1;
1649 else if (unformat (input, "elog-events %d",
1650 &vm->elog_main.event_ring_size))
1652 else if (unformat (input, "elog-post-mortem-dump"))
1653 vm->elog_post_mortem_dump = 1;
1655 return unformat_parse_error (input);
1658 unformat_free (input);
1660 /* Enable memory trace as early as possible. */
1661 if (turn_on_mem_trace)
1667 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
1670 dummy_queue_signal_callback (vlib_main_t * vm)
1674 #define foreach_weak_reference_stub \
1675 _(vlib_map_stat_segment_init) \
1677 _(vlibmemory_init) \
1678 _(map_api_segment_init)
1681 clib_error_t *name (vlib_main_t *vm) __attribute__((weak)); \
1682 clib_error_t *name (vlib_main_t *vm) { return 0; }
1683 foreach_weak_reference_stub;
1686 /* Main function. */
1688 vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
1690 clib_error_t *volatile error;
1691 vlib_node_main_t *nm = &vm->node_main;
1693 vm->queue_signal_callback = dummy_queue_signal_callback;
1695 clib_time_init (&vm->clib_time);
1697 /* Turn on event log. */
1698 if (!vm->elog_main.event_ring_size)
1699 vm->elog_main.event_ring_size = 128 << 10;
1700 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
1701 elog_enable_disable (&vm->elog_main, 1);
1707 if ((error = unix_physmem_init (vm)))
1709 clib_error_report (error);
1713 if ((error = vlib_buffer_main_init (vm)))
1715 clib_error_report (error);
1719 if ((error = vlib_thread_init (vm)))
1721 clib_error_report (error);
1725 if ((error = vlib_map_stat_segment_init (vm)))
1727 clib_error_report (error);
1731 /* Register static nodes so that init functions may use them. */
1732 vlib_register_all_static_nodes (vm);
1734 /* Set seed for random number generator.
1735 Allow user to specify seed to make random sequence deterministic. */
1736 if (!unformat (input, "seed %wd", &vm->random_seed))
1737 vm->random_seed = clib_cpu_time_now ();
1738 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
1740 /* Initialize node graph. */
1741 if ((error = vlib_node_main_init (vm)))
1743 /* Arrange for graph hook up error to not be fatal when debugging. */
1745 clib_error_report (error);
1750 /* Direct call / weak reference, for vlib standalone use-cases */
1751 if ((error = vpe_api_init (vm)))
1753 clib_error_report (error);
1757 if ((error = vlibmemory_init (vm)))
1759 clib_error_report (error);
1763 if ((error = map_api_segment_init (vm)))
1765 clib_error_report (error);
1769 /* See unix/main.c; most likely already set up */
1770 if (vm->init_functions_called == 0)
1771 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
1772 if ((error = vlib_call_all_init_functions (vm)))
1775 /* Create default buffer free list. */
1776 vlib_buffer_create_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
1779 nm->timing_wheel = clib_mem_alloc_aligned (sizeof (TWT (tw_timer_wheel)),
1780 CLIB_CACHE_LINE_BYTES);
1782 vec_validate (nm->data_from_advancing_timing_wheel, 10);
1783 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1785 /* Create the process timing wheel */
1786 TW (tw_timer_wheel_init) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1787 0 /* no callback */ ,
1788 10e-6 /* timer period 10us */ ,
1789 ~0 /* max expirations per call */ );
1791 vec_validate (vm->pending_rpc_requests, 0);
1792 _vec_len (vm->pending_rpc_requests) = 0;
1794 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
1796 case VLIB_MAIN_LOOP_EXIT_NONE:
1797 vm->main_loop_exit_set = 1;
1800 case VLIB_MAIN_LOOP_EXIT_CLI:
1804 error = vm->main_loop_error;
1808 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
1811 /* Call all main loop enter functions. */
1813 clib_error_t *sub_error;
1814 sub_error = vlib_call_all_main_loop_enter_functions (vm);
1816 clib_error_report (sub_error);
1819 vlib_main_loop (vm);
1822 /* Call all exit functions. */
1824 clib_error_t *sub_error;
1825 sub_error = vlib_call_all_main_loop_exit_functions (vm);
1827 clib_error_report (sub_error);
1831 clib_error_report (error);
1837 * fd.io coding-style-patch-verification: ON
1840 * eval: (c-set-style "gnu")