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. */
146 clib_memset (f, 0xfe, n);
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;
162 fs->n_alloc_frames += 1;
167 /* Allocate a frame for from FROM_NODE to TO_NODE via TO_NEXT_INDEX.
168 Returns frame index. */
170 vlib_frame_alloc (vlib_main_t * vm, vlib_node_runtime_t * from_node_runtime,
173 vlib_node_t *from_node;
175 from_node = vlib_get_node (vm, from_node_runtime->node_index);
176 ASSERT (to_next_index < vec_len (from_node->next_nodes));
178 return vlib_frame_alloc_to_node (vm, from_node->next_nodes[to_next_index],
179 /* frame_flags */ 0);
183 vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index)
185 u32 fi = vlib_frame_alloc_to_node (vm, to_node_index,
187 VLIB_FRAME_FREE_AFTER_DISPATCH);
188 return vlib_get_frame (vm, fi);
192 vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index, vlib_frame_t * f)
194 vlib_pending_frame_t *p;
195 vlib_node_t *to_node;
197 if (f->n_vectors == 0)
200 to_node = vlib_get_node (vm, to_node_index);
202 vec_add2 (vm->node_main.pending_frames, p, 1);
204 f->frame_flags |= VLIB_FRAME_PENDING;
205 p->frame_index = vlib_frame_index (vm, f);
206 p->node_runtime_index = to_node->runtime_index;
207 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
210 /* Free given frame. */
212 vlib_frame_free (vlib_main_t * vm, vlib_node_runtime_t * r, vlib_frame_t * f)
214 vlib_node_main_t *nm = &vm->node_main;
216 vlib_frame_size_t *fs;
219 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
221 node = vlib_get_node (vm, r->node_index);
222 fs = get_frame_size_info (nm, node->scalar_size, node->vector_size);
224 frame_index = vlib_frame_index (vm, f);
226 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
228 /* No next frames may point to freed frame. */
231 vlib_next_frame_t *nf;
232 vec_foreach (nf, vm->node_main.next_frames)
233 ASSERT (nf->frame_index != frame_index);
236 f->frame_flags &= ~VLIB_FRAME_IS_ALLOCATED;
238 vec_add1 (fs->free_frame_indices, frame_index);
239 ASSERT (fs->n_alloc_frames > 0);
240 fs->n_alloc_frames -= 1;
243 static clib_error_t *
244 show_frame_stats (vlib_main_t * vm,
245 unformat_input_t * input, vlib_cli_command_t * cmd)
247 vlib_node_main_t *nm = &vm->node_main;
248 vlib_frame_size_t *fs;
250 vlib_cli_output (vm, "%=6s%=12s%=12s", "Size", "# Alloc", "# Free");
251 vec_foreach (fs, nm->frame_sizes)
253 u32 n_alloc = fs->n_alloc_frames;
254 u32 n_free = vec_len (fs->free_frame_indices);
256 if (n_alloc + n_free > 0)
257 vlib_cli_output (vm, "%=6d%=12d%=12d",
258 fs - nm->frame_sizes, n_alloc, n_free);
265 VLIB_CLI_COMMAND (show_frame_stats_cli, static) = {
266 .path = "show vlib frame-allocation",
267 .short_help = "Show node dispatch frame statistics",
268 .function = show_frame_stats,
272 /* Change ownership of enqueue rights to given next node. */
274 vlib_next_frame_change_ownership (vlib_main_t * vm,
275 vlib_node_runtime_t * node_runtime,
278 vlib_node_main_t *nm = &vm->node_main;
279 vlib_next_frame_t *next_frame;
280 vlib_node_t *node, *next_node;
282 node = vec_elt (nm->nodes, node_runtime->node_index);
284 /* Only internal & input nodes are allowed to call other nodes. */
285 ASSERT (node->type == VLIB_NODE_TYPE_INTERNAL
286 || node->type == VLIB_NODE_TYPE_INPUT
287 || node->type == VLIB_NODE_TYPE_PROCESS);
289 ASSERT (vec_len (node->next_nodes) == node_runtime->n_next_nodes);
292 vlib_node_runtime_get_next_frame (vm, node_runtime, next_index);
293 next_node = vec_elt (nm->nodes, node->next_nodes[next_index]);
295 if (next_node->owner_node_index != VLIB_INVALID_NODE_INDEX)
297 /* Get frame from previous owner. */
298 vlib_next_frame_t *owner_next_frame;
299 vlib_next_frame_t tmp;
302 vlib_node_get_next_frame (vm,
303 next_node->owner_node_index,
304 next_node->owner_next_index);
306 /* Swap target next frame with owner's. */
307 tmp = owner_next_frame[0];
308 owner_next_frame[0] = next_frame[0];
312 * If next_frame is already pending, we have to track down
313 * all pending frames and fix their next_frame_index fields.
315 if (next_frame->flags & VLIB_FRAME_PENDING)
317 vlib_pending_frame_t *p;
318 if (next_frame->frame_index != ~0)
320 vec_foreach (p, nm->pending_frames)
322 if (p->frame_index == next_frame->frame_index)
324 p->next_frame_index =
325 next_frame - vm->node_main.next_frames;
333 /* No previous owner. Take ownership. */
334 next_frame->flags |= VLIB_FRAME_OWNER;
337 /* Record new owner. */
338 next_node->owner_node_index = node->index;
339 next_node->owner_next_index = next_index;
341 /* Now we should be owner. */
342 ASSERT (next_frame->flags & VLIB_FRAME_OWNER);
345 /* Make sure that magic number is still there.
346 Otherwise, it is likely that caller has overrun frame arguments. */
348 validate_frame_magic (vlib_main_t * vm,
349 vlib_frame_t * f, vlib_node_t * n, uword next_index)
351 vlib_node_t *next_node = vlib_get_node (vm, n->next_nodes[next_index]);
352 u32 *magic = vlib_frame_find_magic (f, next_node);
353 ASSERT (VLIB_FRAME_MAGIC == magic[0]);
357 vlib_get_next_frame_internal (vlib_main_t * vm,
358 vlib_node_runtime_t * node,
359 u32 next_index, u32 allocate_new_next_frame)
362 vlib_next_frame_t *nf;
365 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
367 /* Make sure this next frame owns right to enqueue to destination frame. */
368 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_OWNER)))
369 vlib_next_frame_change_ownership (vm, node, next_index);
371 /* ??? Don't need valid flag: can use frame_index == ~0 */
372 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_IS_ALLOCATED)))
374 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
375 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
378 f = vlib_get_frame (vm, nf->frame_index);
380 /* Has frame been removed from pending vector (e.g. finished dispatching)?
381 If so we can reuse frame. */
382 if ((nf->flags & VLIB_FRAME_PENDING)
383 && !(f->frame_flags & VLIB_FRAME_PENDING))
385 nf->flags &= ~VLIB_FRAME_PENDING;
389 /* Allocate new frame if current one is already full. */
390 n_used = f->n_vectors;
391 if (n_used >= VLIB_FRAME_SIZE || (allocate_new_next_frame && n_used > 0))
393 /* Old frame may need to be freed after dispatch, since we'll have
394 two redundant frames from node -> next node. */
395 if (!(nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH))
397 vlib_frame_t *f_old = vlib_get_frame (vm, nf->frame_index);
398 f_old->frame_flags |= VLIB_FRAME_FREE_AFTER_DISPATCH;
401 /* Allocate new frame to replace full one. */
402 nf->frame_index = vlib_frame_alloc (vm, node, next_index);
403 f = vlib_get_frame (vm, nf->frame_index);
404 n_used = f->n_vectors;
407 /* Should have free vectors in frame now. */
408 ASSERT (n_used < VLIB_FRAME_SIZE);
412 validate_frame_magic (vm, f,
413 vlib_get_node (vm, node->node_index), next_index);
420 vlib_put_next_frame_validate (vlib_main_t * vm,
421 vlib_node_runtime_t * rt,
422 u32 next_index, u32 n_vectors_left)
424 vlib_node_main_t *nm = &vm->node_main;
425 vlib_next_frame_t *nf;
427 vlib_node_runtime_t *next_rt;
428 vlib_node_t *next_node;
429 u32 n_before, n_after;
431 nf = vlib_node_runtime_get_next_frame (vm, rt, next_index);
432 f = vlib_get_frame (vm, nf->frame_index);
434 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
435 n_after = VLIB_FRAME_SIZE - n_vectors_left;
436 n_before = f->n_vectors;
438 ASSERT (n_after >= n_before);
440 next_rt = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
441 nf->node_runtime_index);
442 next_node = vlib_get_node (vm, next_rt->node_index);
443 if (n_after > 0 && next_node->validate_frame)
445 u8 *msg = next_node->validate_frame (vm, rt, f);
448 clib_warning ("%v", msg);
456 vlib_put_next_frame (vlib_main_t * vm,
457 vlib_node_runtime_t * r,
458 u32 next_index, u32 n_vectors_left)
460 vlib_node_main_t *nm = &vm->node_main;
461 vlib_next_frame_t *nf;
463 u32 n_vectors_in_frame;
465 if (buffer_main.callbacks_registered == 0 && CLIB_DEBUG > 0)
466 vlib_put_next_frame_validate (vm, r, next_index, n_vectors_left);
468 nf = vlib_node_runtime_get_next_frame (vm, r, next_index);
469 f = vlib_get_frame (vm, nf->frame_index);
471 /* Make sure that magic number is still there. Otherwise, caller
472 has overrun frame meta data. */
475 vlib_node_t *node = vlib_get_node (vm, r->node_index);
476 validate_frame_magic (vm, f, node, next_index);
479 /* Convert # of vectors left -> number of vectors there. */
480 ASSERT (n_vectors_left <= VLIB_FRAME_SIZE);
481 n_vectors_in_frame = VLIB_FRAME_SIZE - n_vectors_left;
483 f->n_vectors = n_vectors_in_frame;
485 /* If vectors were added to frame, add to pending vector. */
486 if (PREDICT_TRUE (n_vectors_in_frame > 0))
488 vlib_pending_frame_t *p;
491 r->cached_next_index = next_index;
493 if (!(f->frame_flags & VLIB_FRAME_PENDING))
495 __attribute__ ((unused)) vlib_node_t *node;
496 vlib_node_t *next_node;
497 vlib_node_runtime_t *next_runtime;
499 node = vlib_get_node (vm, r->node_index);
500 next_node = vlib_get_next_node (vm, r->node_index, next_index);
501 next_runtime = vlib_node_get_runtime (vm, next_node->index);
503 vec_add2 (nm->pending_frames, p, 1);
505 p->frame_index = nf->frame_index;
506 p->node_runtime_index = nf->node_runtime_index;
507 p->next_frame_index = nf - nm->next_frames;
508 nf->flags |= VLIB_FRAME_PENDING;
509 f->frame_flags |= VLIB_FRAME_PENDING;
512 * If we're going to dispatch this frame on another thread,
513 * force allocation of a new frame. Otherwise, we create
514 * a dangling frame reference. Each thread has its own copy of
515 * the next_frames vector.
517 if (0 && r->thread_index != next_runtime->thread_index)
519 nf->frame_index = ~0;
520 nf->flags &= ~(VLIB_FRAME_PENDING | VLIB_FRAME_IS_ALLOCATED);
524 /* Copy trace flag from next_frame and from runtime. */
526 (nf->flags & VLIB_NODE_FLAG_TRACE) | (r->
527 flags & VLIB_NODE_FLAG_TRACE);
529 v0 = nf->vectors_since_last_overflow;
530 v1 = v0 + n_vectors_in_frame;
531 nf->vectors_since_last_overflow = v1;
532 if (PREDICT_FALSE (v1 < v0))
534 vlib_node_t *node = vlib_get_node (vm, r->node_index);
535 vec_elt (node->n_vectors_by_next_node, next_index) += v0;
540 /* Sync up runtime (32 bit counters) and main node stats (64 bit counters). */
542 vlib_node_runtime_sync_stats (vlib_main_t * vm,
543 vlib_node_runtime_t * r,
544 uword n_calls, uword n_vectors, uword n_clocks,
547 vlib_node_t *n = vlib_get_node (vm, r->node_index);
549 n->stats_total.calls += n_calls + r->calls_since_last_overflow;
550 n->stats_total.vectors += n_vectors + r->vectors_since_last_overflow;
551 n->stats_total.clocks += n_clocks + r->clocks_since_last_overflow;
552 n->stats_total.perf_counter_ticks += n_ticks +
553 r->perf_counter_ticks_since_last_overflow;
554 n->stats_total.perf_counter_vectors += n_vectors +
555 r->perf_counter_vectors_since_last_overflow;
556 n->stats_total.max_clock = r->max_clock;
557 n->stats_total.max_clock_n = r->max_clock_n;
559 r->calls_since_last_overflow = 0;
560 r->vectors_since_last_overflow = 0;
561 r->clocks_since_last_overflow = 0;
562 r->perf_counter_ticks_since_last_overflow = 0ULL;
563 r->perf_counter_vectors_since_last_overflow = 0ULL;
566 always_inline void __attribute__ ((unused))
567 vlib_process_sync_stats (vlib_main_t * vm,
569 uword n_calls, uword n_vectors, uword n_clocks,
572 vlib_node_runtime_t *rt = &p->node_runtime;
573 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
574 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks,
576 n->stats_total.suspends += p->n_suspends;
581 vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
583 vlib_node_runtime_t *rt;
585 if (n->type == VLIB_NODE_TYPE_PROCESS)
587 /* Nothing to do for PROCESS nodes except in main thread */
588 if (vm != &vlib_global_main)
591 vlib_process_t *p = vlib_get_process_from_node (vm, n);
592 n->stats_total.suspends += p->n_suspends;
594 rt = &p->node_runtime;
598 vec_elt_at_index (vm->node_main.nodes_by_type[n->type],
601 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0, 0);
603 /* Sync up runtime next frame vector counters with main node structure. */
605 vlib_next_frame_t *nf;
607 for (i = 0; i < rt->n_next_nodes; i++)
609 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
610 vec_elt (n->n_vectors_by_next_node, i) +=
611 nf->vectors_since_last_overflow;
612 nf->vectors_since_last_overflow = 0;
618 vlib_node_runtime_update_stats (vlib_main_t * vm,
619 vlib_node_runtime_t * node,
621 uword n_vectors, uword n_clocks,
624 u32 ca0, ca1, v0, v1, cl0, cl1, r;
625 u32 ptick0, ptick1, pvec0, pvec1;
627 cl0 = cl1 = node->clocks_since_last_overflow;
628 ca0 = ca1 = node->calls_since_last_overflow;
629 v0 = v1 = node->vectors_since_last_overflow;
630 ptick0 = ptick1 = node->perf_counter_ticks_since_last_overflow;
631 pvec0 = pvec1 = node->perf_counter_vectors_since_last_overflow;
635 cl1 = cl0 + n_clocks;
636 ptick1 = ptick0 + n_ticks;
637 pvec1 = pvec0 + n_vectors;
639 node->calls_since_last_overflow = ca1;
640 node->clocks_since_last_overflow = cl1;
641 node->vectors_since_last_overflow = v1;
642 node->perf_counter_ticks_since_last_overflow = ptick1;
643 node->perf_counter_vectors_since_last_overflow = pvec1;
645 node->max_clock_n = node->max_clock > n_clocks ?
646 node->max_clock_n : n_vectors;
647 node->max_clock = node->max_clock > n_clocks ? node->max_clock : n_clocks;
649 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
651 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0) || (ptick1 < ptick0)
654 node->calls_since_last_overflow = ca0;
655 node->clocks_since_last_overflow = cl0;
656 node->vectors_since_last_overflow = v0;
657 node->perf_counter_ticks_since_last_overflow = ptick0;
658 node->perf_counter_vectors_since_last_overflow = pvec0;
660 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks,
668 vlib_node_runtime_perf_counter (vlib_main_t * vm)
670 if (PREDICT_FALSE (vm->vlib_node_runtime_perf_counter_cb != 0))
671 return ((*vm->vlib_node_runtime_perf_counter_cb) (vm));
676 vlib_process_update_stats (vlib_main_t * vm,
678 uword n_calls, uword n_vectors, uword n_clocks,
681 vlib_node_runtime_update_stats (vm, &p->node_runtime,
682 n_calls, n_vectors, n_clocks, n_ticks);
685 static clib_error_t *
686 vlib_cli_elog_clear (vlib_main_t * vm,
687 unformat_input_t * input, vlib_cli_command_t * cmd)
689 elog_reset_buffer (&vm->elog_main);
694 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
695 .path = "event-logger clear",
696 .short_help = "Clear the event log",
697 .function = vlib_cli_elog_clear,
702 static clib_error_t *
703 elog_save_buffer (vlib_main_t * vm,
704 unformat_input_t * input, vlib_cli_command_t * cmd)
706 elog_main_t *em = &vm->elog_main;
707 char *file, *chroot_file;
708 clib_error_t *error = 0;
710 if (!unformat (input, "%s", &file))
712 vlib_cli_output (vm, "expected file name, got `%U'",
713 format_unformat_error, input);
717 /* It's fairly hard to get "../oopsie" through unformat; just in case */
718 if (strstr (file, "..") || index (file, '/'))
720 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
724 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
728 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
729 elog_n_events_in_buffer (em),
730 elog_buffer_capacity (em), chroot_file);
732 vlib_worker_thread_barrier_sync (vm);
733 error = elog_write_file (em, chroot_file, 1 /* flush ring */ );
734 vlib_worker_thread_barrier_release (vm);
735 vec_free (chroot_file);
740 elog_post_mortem_dump (void)
742 vlib_main_t *vm = &vlib_global_main;
743 elog_main_t *em = &vm->elog_main;
747 if (!vm->elog_post_mortem_dump)
750 filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0);
751 error = elog_write_file (em, (char *) filename, 1 /* flush ring */ );
753 clib_error_report (error);
758 VLIB_CLI_COMMAND (elog_save_cli, static) = {
759 .path = "event-logger save",
760 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
761 .function = elog_save_buffer,
765 static clib_error_t *
766 elog_stop (vlib_main_t * vm,
767 unformat_input_t * input, vlib_cli_command_t * cmd)
769 elog_main_t *em = &vm->elog_main;
771 em->n_total_events_disable_limit = em->n_total_events;
773 vlib_cli_output (vm, "Stopped the event logger...");
778 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
779 .path = "event-logger stop",
780 .short_help = "Stop the event-logger",
781 .function = elog_stop,
785 static clib_error_t *
786 elog_restart (vlib_main_t * vm,
787 unformat_input_t * input, vlib_cli_command_t * cmd)
789 elog_main_t *em = &vm->elog_main;
791 em->n_total_events_disable_limit = ~0;
793 vlib_cli_output (vm, "Restarted the event logger...");
798 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
799 .path = "event-logger restart",
800 .short_help = "Restart the event-logger",
801 .function = elog_restart,
805 static clib_error_t *
806 elog_resize (vlib_main_t * vm,
807 unformat_input_t * input, vlib_cli_command_t * cmd)
809 elog_main_t *em = &vm->elog_main;
812 /* Stop the parade */
813 elog_reset_buffer (&vm->elog_main);
815 if (unformat (input, "%d", &tmp))
817 elog_alloc (em, tmp);
818 em->n_total_events_disable_limit = ~0;
821 return clib_error_return (0, "Must specify how many events in the ring");
823 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
828 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
829 .path = "event-logger resize",
830 .short_help = "event-logger resize <nnn>",
831 .function = elog_resize,
835 #endif /* CLIB_UNIX */
838 elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
840 elog_main_t *em = &vm->elog_main;
841 elog_event_t *e, *es;
844 /* Show events in VLIB time since log clock starts after VLIB clock. */
845 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
846 * vm->clib_time.seconds_per_clock;
848 es = elog_peek_events (em);
849 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
851 em->n_total_events < em->n_total_events_disable_limit ?
852 "running" : "stopped");
855 vlib_cli_output (vm, "%18.9f: %U",
856 e->time + dt, format_elog_event, em, e);
858 if (n_events_to_show == 0)
865 static clib_error_t *
866 elog_show_buffer (vlib_main_t * vm,
867 unformat_input_t * input, vlib_cli_command_t * cmd)
869 u32 n_events_to_show;
870 clib_error_t *error = 0;
872 n_events_to_show = 250;
873 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
875 if (unformat (input, "%d", &n_events_to_show))
877 else if (unformat (input, "all"))
878 n_events_to_show = ~0;
880 return unformat_parse_error (input);
882 elog_show_buffer_internal (vm, n_events_to_show);
887 VLIB_CLI_COMMAND (elog_show_cli, static) = {
888 .path = "show event-logger",
889 .short_help = "Show event logger info",
890 .function = elog_show_buffer,
895 vlib_gdb_show_event_log (void)
897 elog_show_buffer_internal (vlib_get_main (), (u32) ~ 0);
901 vlib_elog_main_loop_event (vlib_main_t * vm,
903 u64 time, u32 n_vectors, u32 is_return)
905 vlib_main_t *evm = &vlib_global_main;
906 elog_main_t *em = &evm->elog_main;
908 if (VLIB_ELOG_MAIN_LOOP && n_vectors)
911 vec_elt_at_index (is_return
912 ? evm->node_return_elog_event_types
913 : evm->node_call_elog_event_types,
916 (vm->thread_index ? &vlib_worker_threads[vm->thread_index].
917 elog_track : &em->default_track),
918 /* data to log */ n_vectors);
921 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
922 void (*vlib_buffer_trace_trajectory_cb) (vlib_buffer_t * b, u32 node_index);
923 void (*vlib_buffer_trace_trajectory_init_cb) (vlib_buffer_t * b);
926 vlib_buffer_trace_trajectory_init (vlib_buffer_t * b)
928 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_init_cb != 0))
930 (*vlib_buffer_trace_trajectory_init_cb) (b);
937 add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
939 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
940 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_cb != 0))
942 (*vlib_buffer_trace_trajectory_cb) (b, node_index);
948 dispatch_pcap_trace (vlib_main_t * vm,
949 vlib_node_runtime_t * node, vlib_frame_t * frame)
952 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **bufp, *b;
954 pcap_main_t *pm = &vm->dispatch_pcap_main;
958 f64 time_now = vlib_time_now (vm);
963 /* Input nodes don't have frames yet */
964 if (frame == 0 || frame->n_vectors == 0)
967 from = vlib_frame_vector_args (frame);
968 vlib_get_buffers (vm, from, bufs, frame->n_vectors);
971 /* Create a node name TLV, since WS can't possibly guess */
972 n = vlib_get_node (vm, node->node_index);
973 name_length = vec_len (n->name);
974 name_length = name_length < ARRAY_LEN (name_tlv) - 2 ?
975 name_length : ARRAY_LEN (name_tlv) - 2;
977 name_tlv[0] = (u8) name_length;
978 clib_memcpy_fast (name_tlv + 1, n->name, name_length);
979 name_tlv[name_length + 1] = 0;
981 for (i = 0; i < frame->n_vectors; i++)
983 if (PREDICT_TRUE (pm->n_packets_captured < pm->n_packets_to_capture))
987 /* Figure out how many bytes we're capturing */
988 capture_size = (sizeof (vlib_buffer_t) - VLIB_BUFFER_PRE_DATA_SIZE) + vlib_buffer_length_in_chain (vm, b) + sizeof (u32) + +(name_length + 2); /* +2: count plus NULL byte */
990 clib_spinlock_lock_if_init (&pm->lock);
991 n_left = clib_min (capture_size, 512);
992 d = pcap_add_packet (pm, time_now, n_left, capture_size);
994 /* Copy the buffer index */
995 clib_memcpy_fast (d, &from[i], sizeof (u32));
998 /* Copy the name TLV */
999 clib_memcpy_fast (d, name_tlv, name_length + 2);
1000 d += name_length + 2;
1002 /* Copy the buffer metadata, but not the rewrite space */
1003 clib_memcpy_fast (d, b, sizeof (*b) - VLIB_BUFFER_PRE_DATA_SIZE);
1004 d += sizeof (*b) - VLIB_BUFFER_PRE_DATA_SIZE;
1006 n_left = clib_min (vlib_buffer_length_in_chain (vm, b),
1007 512 - (sizeof (*b) - VLIB_BUFFER_PRE_DATA_SIZE));
1008 /* Copy the packet data */
1011 u32 copy_length = clib_min ((u32) n_left, b->current_length);
1012 clib_memcpy_fast (d, b->data + b->current_data, copy_length);
1013 n_left -= b->current_length;
1016 d += b->current_length;
1017 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
1018 b = vlib_get_buffer (vm, b->next_buffer);
1020 clib_spinlock_unlock_if_init (&pm->lock);
1025 static_always_inline u64
1026 dispatch_node (vlib_main_t * vm,
1027 vlib_node_runtime_t * node,
1028 vlib_node_type_t type,
1029 vlib_node_state_t dispatch_state,
1030 vlib_frame_t * frame, u64 last_time_stamp)
1034 vlib_node_main_t *nm = &vm->node_main;
1035 vlib_next_frame_t *nf;
1039 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1040 ASSERT (n->type == type);
1043 /* Only non-internal nodes may be disabled. */
1044 if (type != VLIB_NODE_TYPE_INTERNAL && node->state != dispatch_state)
1046 ASSERT (type != VLIB_NODE_TYPE_INTERNAL);
1047 return last_time_stamp;
1050 if ((type == VLIB_NODE_TYPE_PRE_INPUT || type == VLIB_NODE_TYPE_INPUT)
1051 && dispatch_state != VLIB_NODE_STATE_INTERRUPT)
1053 u32 c = node->input_main_loops_per_call;
1054 /* Only call node when count reaches zero. */
1057 node->input_main_loops_per_call = c - 1;
1058 return last_time_stamp;
1062 /* Speculatively prefetch next frames. */
1063 if (node->n_next_nodes > 0)
1065 nf = vec_elt_at_index (nm->next_frames, node->next_frame_index);
1066 CLIB_PREFETCH (nf, 4 * sizeof (nf[0]), WRITE);
1069 vm->cpu_time_last_node_dispatch = last_time_stamp;
1071 if (1 /* || vm->thread_index == node->thread_index */ )
1073 u64 pmc_before, pmc_delta;
1075 vlib_elog_main_loop_event (vm, node->node_index,
1077 frame ? frame->n_vectors : 0,
1081 * To validate accounting: pmc_before = last_time_stamp
1082 * perf ticks should equal clocks/pkt...
1084 pmc_before = vlib_node_runtime_perf_counter (vm);
1087 * Turn this on if you run into
1088 * "bad monkey" contexts, and you want to know exactly
1089 * which nodes they've visited... See ixge.c...
1091 if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
1095 from = vlib_frame_vector_args (frame);
1096 for (i = 0; i < frame->n_vectors; i++)
1098 vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
1099 add_trajectory_trace (b, node->node_index);
1101 if (PREDICT_FALSE (vm->dispatch_pcap_enable))
1102 dispatch_pcap_trace (vm, node, frame);
1103 n = node->function (vm, node, frame);
1107 if (PREDICT_FALSE (vm->dispatch_pcap_enable))
1108 dispatch_pcap_trace (vm, node, frame);
1109 n = node->function (vm, node, frame);
1112 t = clib_cpu_time_now ();
1115 * To validate accounting: pmc_delta = t - pmc_before;
1116 * perf ticks should equal clocks/pkt...
1118 pmc_delta = vlib_node_runtime_perf_counter (vm) - pmc_before;
1120 vlib_elog_main_loop_event (vm, node->node_index, t, n, /* is_after */
1123 vm->main_loop_vectors_processed += n;
1124 vm->main_loop_nodes_processed += n > 0;
1126 v = vlib_node_runtime_update_stats (vm, node,
1129 /* n_clocks */ t - last_time_stamp,
1130 pmc_delta /* PMC ticks */ );
1132 /* When in interrupt mode and vector rate crosses threshold switch to
1134 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1135 || (dispatch_state == VLIB_NODE_STATE_POLLING
1137 & VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE)))
1139 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1140 ELOG_TYPE_DECLARE (e) =
1142 .function = (char *) __FUNCTION__,.format =
1143 "%s vector length %d, switching to %s",.format_args =
1144 "T4i4t4",.n_enum_strings = 2,.enum_strings =
1146 "interrupt", "polling",},};
1149 u32 node_name, vector_length, is_polling;
1151 vlib_worker_thread_t *w = vlib_worker_threads + vm->thread_index;
1154 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT
1155 && v >= nm->polling_threshold_vector_length) &&
1157 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
1159 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1160 n->state = VLIB_NODE_STATE_POLLING;
1161 node->state = VLIB_NODE_STATE_POLLING;
1163 ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1165 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1166 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1167 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1169 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1170 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1172 ed->node_name = n->name_elog_string;
1173 ed->vector_length = v;
1177 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1178 && v <= nm->interrupt_threshold_vector_length)
1180 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1182 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1184 /* Switch to interrupt mode after dispatch in polling one more time.
1185 This allows driver to re-enable interrupts. */
1186 n->state = VLIB_NODE_STATE_INTERRUPT;
1187 node->state = VLIB_NODE_STATE_INTERRUPT;
1189 ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1190 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -=
1192 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] +=
1199 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1200 #ifdef DISPATCH_NODE_ELOG_REQUIRED
1201 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1203 ed->node_name = n->name_elog_string;
1204 ed->vector_length = v;
1216 dispatch_pending_node (vlib_main_t * vm, uword pending_frame_index,
1217 u64 last_time_stamp)
1219 vlib_node_main_t *nm = &vm->node_main;
1221 vlib_next_frame_t *nf, nf_dummy;
1222 vlib_node_runtime_t *n;
1223 u32 restore_frame_index;
1224 vlib_pending_frame_t *p;
1226 /* See comment below about dangling references to nm->pending_frames */
1227 p = nm->pending_frames + pending_frame_index;
1229 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1230 p->node_runtime_index);
1232 f = vlib_get_frame (vm, p->frame_index);
1233 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1235 /* No next frame: so use dummy on stack. */
1237 nf->flags = f->frame_flags & VLIB_NODE_FLAG_TRACE;
1238 nf->frame_index = ~p->frame_index;
1241 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1243 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
1245 /* Force allocation of new frame while current frame is being
1247 restore_frame_index = ~0;
1248 if (nf->frame_index == p->frame_index)
1250 nf->frame_index = ~0;
1251 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1252 if (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1253 restore_frame_index = p->frame_index;
1256 /* Frame must be pending. */
1257 ASSERT (f->frame_flags & VLIB_FRAME_PENDING);
1258 ASSERT (f->n_vectors > 0);
1260 /* Copy trace flag from next frame to node.
1261 Trace flag indicates that at least one vector in the dispatched
1263 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1264 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1265 nf->flags &= ~VLIB_FRAME_TRACE;
1267 last_time_stamp = dispatch_node (vm, n,
1268 VLIB_NODE_TYPE_INTERNAL,
1269 VLIB_NODE_STATE_POLLING,
1270 f, last_time_stamp);
1272 f->frame_flags &= ~VLIB_FRAME_PENDING;
1274 /* Frame is ready to be used again, so restore it. */
1275 if (restore_frame_index != ~0)
1278 * We musn't restore a frame that is flagged to be freed. This
1279 * shouldn't happen since frames to be freed post dispatch are
1280 * those used when the to-node frame becomes full i.e. they form a
1281 * sort of queue of frames to a single node. If we get here then
1282 * the to-node frame and the pending frame *were* the same, and so
1283 * we removed the to-node frame. Therefore this frame is no
1284 * longer part of the queue for that node and hence it cannot be
1287 ASSERT (!(f->frame_flags & VLIB_FRAME_FREE_AFTER_DISPATCH));
1290 * NB: dispatching node n can result in the creation and scheduling
1291 * of new frames, and hence in the reallocation of nm->pending_frames.
1292 * Recompute p, or no supper. This was broken for more than 10 years.
1294 p = nm->pending_frames + pending_frame_index;
1297 * p->next_frame_index can change during node dispatch if node
1298 * function decides to change graph hook up.
1300 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1301 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1303 if (~0 == nf->frame_index)
1305 /* no new frame has been assigned to this node, use the saved one */
1306 nf->frame_index = restore_frame_index;
1311 /* The node has gained a frame, implying packets from the current frame
1312 were re-queued to this same node. we don't need the saved one
1314 vlib_frame_free (vm, n, f);
1319 if (f->frame_flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1321 ASSERT (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1322 vlib_frame_free (vm, n, f);
1326 return last_time_stamp;
1330 vlib_process_stack_is_valid (vlib_process_t * p)
1332 return p->stack[0] == VLIB_PROCESS_STACK_MAGIC;
1338 vlib_process_t *process;
1339 vlib_frame_t *frame;
1340 } vlib_process_bootstrap_args_t;
1342 /* Called in process stack. */
1344 vlib_process_bootstrap (uword _a)
1346 vlib_process_bootstrap_args_t *a;
1348 vlib_node_runtime_t *node;
1353 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1358 node = &p->node_runtime;
1360 n = node->function (vm, node, f);
1362 ASSERT (vlib_process_stack_is_valid (p));
1364 clib_longjmp (&p->return_longjmp, n);
1369 /* Called in main stack. */
1370 static_always_inline uword
1371 vlib_process_startup (vlib_main_t * vm, vlib_process_t * p, vlib_frame_t * f)
1373 vlib_process_bootstrap_args_t a;
1380 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1381 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1382 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1383 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1388 static_always_inline uword
1389 vlib_process_resume (vlib_process_t * p)
1392 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1393 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1394 | VLIB_PROCESS_RESUME_PENDING);
1395 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1396 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1397 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1402 dispatch_process (vlib_main_t * vm,
1403 vlib_process_t * p, vlib_frame_t * f, u64 last_time_stamp)
1405 vlib_node_main_t *nm = &vm->node_main;
1406 vlib_node_runtime_t *node_runtime = &p->node_runtime;
1407 vlib_node_t *node = vlib_get_node (vm, node_runtime->node_index);
1408 u32 old_process_index;
1410 uword n_vectors, is_suspend;
1412 if (node->state != VLIB_NODE_STATE_POLLING
1413 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1414 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1415 return last_time_stamp;
1417 p->flags |= VLIB_PROCESS_IS_RUNNING;
1419 t = last_time_stamp;
1420 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1421 f ? f->n_vectors : 0, /* is_after */ 0);
1423 /* Save away current process for suspend. */
1424 old_process_index = nm->current_process_index;
1425 nm->current_process_index = node->runtime_index;
1427 n_vectors = vlib_process_startup (vm, p, f);
1429 nm->current_process_index = old_process_index;
1431 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1432 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1435 vlib_pending_frame_t *pf;
1438 pool_get (nm->suspended_process_frames, pf);
1439 pf->node_runtime_index = node->runtime_index;
1440 pf->frame_index = f ? vlib_frame_index (vm, f) : ~0;
1441 pf->next_frame_index = ~0;
1444 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1446 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1448 TWT (tw_timer_wheel) * tw =
1449 (TWT (tw_timer_wheel) *) nm->timing_wheel;
1450 p->stop_timer_handle =
1451 TW (tw_timer_start) (tw,
1452 vlib_timing_wheel_data_set_suspended_process
1453 (node->runtime_index) /* [sic] pool idex */ ,
1455 p->resume_clock_interval);
1459 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1461 t = clib_cpu_time_now ();
1463 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend,
1466 vlib_process_update_stats (vm, p,
1467 /* n_calls */ !is_suspend,
1468 /* n_vectors */ n_vectors,
1469 /* n_clocks */ t - last_time_stamp,
1470 /* pmc_ticks */ 0ULL);
1476 vlib_start_process (vlib_main_t * vm, uword process_index)
1478 vlib_node_main_t *nm = &vm->node_main;
1479 vlib_process_t *p = vec_elt (nm->processes, process_index);
1480 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1484 dispatch_suspended_process (vlib_main_t * vm,
1485 uword process_index, u64 last_time_stamp)
1487 vlib_node_main_t *nm = &vm->node_main;
1488 vlib_node_runtime_t *node_runtime;
1492 vlib_pending_frame_t *pf;
1493 u64 t, n_vectors, is_suspend;
1495 t = last_time_stamp;
1497 p = vec_elt (nm->processes, process_index);
1498 if (PREDICT_FALSE (!(p->flags & VLIB_PROCESS_IS_RUNNING)))
1499 return last_time_stamp;
1501 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1502 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1504 pf = pool_elt_at_index (nm->suspended_process_frames,
1505 p->suspended_process_frame_index);
1507 node_runtime = &p->node_runtime;
1508 node = vlib_get_node (vm, node_runtime->node_index);
1509 f = pf->frame_index != ~0 ? vlib_get_frame (vm, pf->frame_index) : 0;
1511 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1512 f ? f->n_vectors : 0, /* is_after */ 0);
1514 /* Save away current process for suspend. */
1515 nm->current_process_index = node->runtime_index;
1517 n_vectors = vlib_process_resume (p);
1518 t = clib_cpu_time_now ();
1520 nm->current_process_index = ~0;
1522 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1525 /* Suspend it again. */
1528 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1530 p->stop_timer_handle =
1531 TW (tw_timer_start) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1532 vlib_timing_wheel_data_set_suspended_process
1533 (node->runtime_index) /* [sic] pool idex */ ,
1535 p->resume_clock_interval);
1540 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1541 pool_put_index (nm->suspended_process_frames,
1542 p->suspended_process_frame_index);
1543 p->suspended_process_frame_index = ~0;
1546 t = clib_cpu_time_now ();
1547 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, !is_suspend,
1550 vlib_process_update_stats (vm, p,
1551 /* n_calls */ !is_suspend,
1552 /* n_vectors */ n_vectors,
1553 /* n_clocks */ t - last_time_stamp,
1554 /* pmc_ticks */ 0ULL);
1559 void vl_api_send_pending_rpc_requests (vlib_main_t *) __attribute__ ((weak));
1561 vl_api_send_pending_rpc_requests (vlib_main_t * vm)
1566 static_always_inline void
1567 vlib_main_or_worker_loop (vlib_main_t * vm, int is_main)
1569 vlib_node_main_t *nm = &vm->node_main;
1570 vlib_thread_main_t *tm = vlib_get_thread_main ();
1573 vlib_frame_queue_main_t *fqm;
1574 u32 *last_node_runtime_indices = 0;
1576 /* Initialize pending node vector. */
1579 vec_resize (nm->pending_frames, 32);
1580 _vec_len (nm->pending_frames) = 0;
1583 /* Mark time of main loop start. */
1586 cpu_time_now = vm->clib_time.last_cpu_time;
1587 vm->cpu_time_main_loop_start = cpu_time_now;
1590 cpu_time_now = clib_cpu_time_now ();
1592 /* Pre-allocate interupt runtime indices and lock. */
1593 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1594 vec_alloc (last_node_runtime_indices, 32);
1596 clib_spinlock_init (&nm->pending_interrupt_lock);
1598 /* Pre-allocate expired nodes. */
1599 if (!nm->polling_threshold_vector_length)
1600 nm->polling_threshold_vector_length = 10;
1601 if (!nm->interrupt_threshold_vector_length)
1602 nm->interrupt_threshold_vector_length = 5;
1604 /* Make sure the performance monitor counter is disabled */
1605 vm->perf_counter_id = ~0;
1607 /* Start all processes. */
1611 nm->current_process_index = ~0;
1612 for (i = 0; i < vec_len (nm->processes); i++)
1613 cpu_time_now = dispatch_process (vm, nm->processes[i], /* frame */ 0,
1619 vlib_node_runtime_t *n;
1621 if (PREDICT_FALSE (_vec_len (vm->pending_rpc_requests) > 0))
1624 vl_api_send_pending_rpc_requests (vm);
1629 vlib_worker_thread_barrier_check ();
1630 vec_foreach (fqm, tm->frame_queue_mains)
1631 vlib_frame_queue_dequeue (vm, fqm);
1632 if (PREDICT_FALSE (vm->worker_thread_main_loop_callback != 0))
1633 ((void (*)(vlib_main_t *)) vm->worker_thread_main_loop_callback)
1637 /* Process pre-input nodes. */
1638 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1639 cpu_time_now = dispatch_node (vm, n,
1640 VLIB_NODE_TYPE_PRE_INPUT,
1641 VLIB_NODE_STATE_POLLING,
1645 /* Next process input nodes. */
1646 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1647 cpu_time_now = dispatch_node (vm, n,
1648 VLIB_NODE_TYPE_INPUT,
1649 VLIB_NODE_STATE_POLLING,
1653 if (PREDICT_TRUE (is_main && vm->queue_signal_pending == 0))
1654 vm->queue_signal_callback (vm);
1656 /* Next handle interrupts. */
1658 /* unlocked read, for performance */
1659 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1661 if (PREDICT_FALSE (l > 0))
1666 clib_spinlock_lock (&nm->pending_interrupt_lock);
1667 /* Re-read w/ lock held, in case another thread added an item */
1668 l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1671 tmp = nm->pending_interrupt_node_runtime_indices;
1672 nm->pending_interrupt_node_runtime_indices =
1673 last_node_runtime_indices;
1674 last_node_runtime_indices = tmp;
1675 _vec_len (last_node_runtime_indices) = 0;
1677 clib_spinlock_unlock (&nm->pending_interrupt_lock);
1678 for (i = 0; i < l; i++)
1680 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1681 last_node_runtime_indices[i]);
1683 dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
1684 VLIB_NODE_STATE_INTERRUPT,
1690 /* Input nodes may have added work to the pending vector.
1691 Process pending vector until there is nothing left.
1692 All pending vectors will be processed from input -> output. */
1693 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1694 cpu_time_now = dispatch_pending_node (vm, i, cpu_time_now);
1695 /* Reset pending vector for next iteration. */
1696 _vec_len (nm->pending_frames) = 0;
1700 /* Check if process nodes have expired from timing wheel. */
1701 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1703 nm->data_from_advancing_timing_wheel =
1704 TW (tw_timer_expire_timers_vec)
1705 ((TWT (tw_timer_wheel) *) nm->timing_wheel, vlib_time_now (vm),
1706 nm->data_from_advancing_timing_wheel);
1708 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1711 (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1715 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel);
1718 u32 d = nm->data_from_advancing_timing_wheel[i];
1719 u32 di = vlib_timing_wheel_data_get_index (d);
1721 if (vlib_timing_wheel_data_is_timed_event (d))
1723 vlib_signal_timed_event_data_t *te =
1724 pool_elt_at_index (nm->signal_timed_event_data_pool,
1727 vlib_get_node (vm, te->process_node_index);
1729 vec_elt (nm->processes, n->runtime_index);
1732 vlib_process_signal_event_helper (nm, n, p,
1733 te->event_type_index,
1735 te->n_data_elt_bytes);
1736 if (te->n_data_bytes < sizeof (te->inline_event_data))
1737 clib_memcpy_fast (data, te->inline_event_data,
1741 clib_memcpy_fast (data, te->event_data_as_vector,
1743 vec_free (te->event_data_as_vector);
1745 pool_put (nm->signal_timed_event_data_pool, te);
1749 cpu_time_now = clib_cpu_time_now ();
1751 dispatch_suspended_process (vm, di, cpu_time_now);
1754 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1757 vlib_increment_main_loop_counter (vm);
1759 /* Record time stamp in case there are no enabled nodes and above
1760 calls do not update time stamp. */
1761 cpu_time_now = clib_cpu_time_now ();
1766 vlib_main_loop (vlib_main_t * vm)
1768 vlib_main_or_worker_loop (vm, /* is_main */ 1);
1772 vlib_worker_loop (vlib_main_t * vm)
1774 vlib_main_or_worker_loop (vm, /* is_main */ 0);
1777 vlib_main_t vlib_global_main;
1779 static clib_error_t *
1780 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1782 int turn_on_mem_trace = 0;
1784 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1786 if (unformat (input, "memory-trace"))
1787 turn_on_mem_trace = 1;
1789 else if (unformat (input, "elog-events %d",
1790 &vm->elog_main.event_ring_size))
1792 else if (unformat (input, "elog-post-mortem-dump"))
1793 vm->elog_post_mortem_dump = 1;
1795 return unformat_parse_error (input);
1798 unformat_free (input);
1800 /* Enable memory trace as early as possible. */
1801 if (turn_on_mem_trace)
1807 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
1810 dummy_queue_signal_callback (vlib_main_t * vm)
1814 #define foreach_weak_reference_stub \
1815 _(vlib_map_stat_segment_init) \
1817 _(vlibmemory_init) \
1818 _(map_api_segment_init)
1821 clib_error_t *name (vlib_main_t *vm) __attribute__((weak)); \
1822 clib_error_t *name (vlib_main_t *vm) { return 0; }
1823 foreach_weak_reference_stub;
1826 /* Main function. */
1828 vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
1830 clib_error_t *volatile error;
1831 vlib_node_main_t *nm = &vm->node_main;
1833 vm->queue_signal_callback = dummy_queue_signal_callback;
1835 clib_time_init (&vm->clib_time);
1837 /* Turn on event log. */
1838 if (!vm->elog_main.event_ring_size)
1839 vm->elog_main.event_ring_size = 128 << 10;
1840 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
1841 elog_enable_disable (&vm->elog_main, 1);
1847 if ((error = vlib_physmem_init (vm)))
1849 clib_error_report (error);
1853 if ((error = vlib_buffer_main_init (vm)))
1855 clib_error_report (error);
1859 if ((error = vlib_thread_init (vm)))
1861 clib_error_report (error);
1865 if ((error = vlib_map_stat_segment_init (vm)))
1867 clib_error_report (error);
1871 /* Register static nodes so that init functions may use them. */
1872 vlib_register_all_static_nodes (vm);
1874 /* Set seed for random number generator.
1875 Allow user to specify seed to make random sequence deterministic. */
1876 if (!unformat (input, "seed %wd", &vm->random_seed))
1877 vm->random_seed = clib_cpu_time_now ();
1878 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
1880 /* Initialize node graph. */
1881 if ((error = vlib_node_main_init (vm)))
1883 /* Arrange for graph hook up error to not be fatal when debugging. */
1885 clib_error_report (error);
1890 /* Direct call / weak reference, for vlib standalone use-cases */
1891 if ((error = vpe_api_init (vm)))
1893 clib_error_report (error);
1897 if ((error = vlibmemory_init (vm)))
1899 clib_error_report (error);
1903 if ((error = map_api_segment_init (vm)))
1905 clib_error_report (error);
1909 /* See unix/main.c; most likely already set up */
1910 if (vm->init_functions_called == 0)
1911 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
1912 if ((error = vlib_call_all_init_functions (vm)))
1915 /* Create default buffer free list. */
1916 vlib_buffer_create_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES,
1919 nm->timing_wheel = clib_mem_alloc_aligned (sizeof (TWT (tw_timer_wheel)),
1920 CLIB_CACHE_LINE_BYTES);
1922 vec_validate (nm->data_from_advancing_timing_wheel, 10);
1923 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1925 /* Create the process timing wheel */
1926 TW (tw_timer_wheel_init) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1927 0 /* no callback */ ,
1928 10e-6 /* timer period 10us */ ,
1929 ~0 /* max expirations per call */ );
1931 vec_validate (vm->pending_rpc_requests, 0);
1932 _vec_len (vm->pending_rpc_requests) = 0;
1933 vec_validate (vm->processing_rpc_requests, 0);
1934 _vec_len (vm->processing_rpc_requests) = 0;
1936 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
1938 case VLIB_MAIN_LOOP_EXIT_NONE:
1939 vm->main_loop_exit_set = 1;
1942 case VLIB_MAIN_LOOP_EXIT_CLI:
1946 error = vm->main_loop_error;
1950 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
1953 /* Call all main loop enter functions. */
1955 clib_error_t *sub_error;
1956 sub_error = vlib_call_all_main_loop_enter_functions (vm);
1958 clib_error_report (sub_error);
1961 vlib_main_loop (vm);
1964 /* Call all exit functions. */
1966 clib_error_t *sub_error;
1967 sub_error = vlib_call_all_main_loop_exit_functions (vm);
1969 clib_error_report (sub_error);
1973 clib_error_report (error);
1978 static inline clib_error_t *
1979 pcap_dispatch_trace_command_internal (vlib_main_t * vm,
1980 unformat_input_t * input,
1981 vlib_cli_command_t * cmd, int rx_tx)
1983 #define PCAP_DEF_PKT_TO_CAPTURE (100)
1985 unformat_input_t _line_input, *line_input = &_line_input;
1986 pcap_main_t *pm = &vm->dispatch_pcap_main;
1988 u8 *chroot_filename = 0;
1992 clib_error_t *error = 0;
1994 /* Get a line of input. */
1995 if (!unformat_user (input, unformat_line_input, line_input))
1998 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2000 if (unformat (line_input, "on"))
2002 if (vm->dispatch_pcap_enable == 0)
2008 vlib_cli_output (vm, "pcap dispatch capture already on...");
2013 else if (unformat (line_input, "off"))
2015 if (vm->dispatch_pcap_enable)
2018 (vm, "captured %d pkts...", pm->n_packets_captured);
2019 if (pm->n_packets_captured)
2021 pm->n_packets_to_capture = pm->n_packets_captured;
2022 error = pcap_write (pm);
2024 clib_error_report (error);
2026 vlib_cli_output (vm, "saved to %s...", pm->file_name);
2028 vm->dispatch_pcap_enable = 0;
2032 vlib_cli_output (vm, "pcap tx capture already off...");
2037 else if (unformat (line_input, "max %d", &max))
2039 if (vm->dispatch_pcap_enable)
2043 "can't change max value while pcap tx capture active...");
2047 pm->n_packets_to_capture = max;
2049 else if (unformat (line_input, "file %s", &filename))
2051 if (vm->dispatch_pcap_enable)
2054 (vm, "can't change file while pcap tx capture active...");
2059 /* Brain-police user path input */
2060 if (strstr ((char *) filename, "..")
2061 || index ((char *) filename, '/'))
2063 vlib_cli_output (vm, "illegal characters in filename '%s'",
2065 vlib_cli_output (vm, "Hint: .. and / are not allowed.");
2066 vec_free (filename);
2071 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
2072 vec_free (filename);
2074 else if (unformat (line_input, "status"))
2076 if (vm->dispatch_pcap_enable)
2079 (vm, "pcap dispatch capture is on: %d of %d pkts...",
2080 pm->n_packets_captured, pm->n_packets_to_capture);
2081 vlib_cli_output (vm, "Capture to file %s", pm->file_name);
2085 vlib_cli_output (vm, "pcap dispatch capture is off...");
2092 error = clib_error_return (0, "unknown input `%U'",
2093 format_unformat_error, line_input);
2098 unformat_free (line_input);
2103 /* Since no error, save configured values. */
2104 if (chroot_filename)
2107 vec_free (pm->file_name);
2108 vec_add1 (chroot_filename, 0);
2109 pm->file_name = (char *) chroot_filename;
2113 pm->n_packets_to_capture = max;
2117 if (pm->file_name == 0)
2118 pm->file_name = (char *) format (0, "/tmp/dispatch.pcap%c", 0);
2120 pm->n_packets_captured = 0;
2121 pm->packet_type = PCAP_PACKET_TYPE_user13;
2123 clib_spinlock_init (&(pm->lock));
2124 vm->dispatch_pcap_enable = 1;
2125 vlib_cli_output (vm, "pcap dispatch capture on...");
2128 else if (chroot_filename)
2129 vec_free (chroot_filename);
2134 static clib_error_t *
2135 pcap_dispatch_trace_command_fn (vlib_main_t * vm,
2136 unformat_input_t * input,
2137 vlib_cli_command_t * cmd)
2139 return pcap_dispatch_trace_command_internal (vm, input, cmd, VLIB_RX);
2143 * This command is used to start or stop pcap dispatch trace capture, or show
2144 * the capture status.
2146 * This command has the following optional parameters:
2148 * - <b>on|off</b> - Used to start or stop capture.
2150 * - <b>max <nn></b> - Depth of local buffer. Once '<em>nn</em>' number
2151 * of packets have been received, buffer is flushed to file. Once another
2152 * '<em>nn</em>' number of packets have been received, buffer is flushed
2153 * to file, overwriting previous write. If not entered, value defaults
2154 * to 100. Can only be updated if packet capture is off.
2156 * - <b>file <name></b> - Used to specify the output filename. The file will
2157 * be placed in the '<em>/tmp</em>' directory, so only the filename is
2158 * supported. Directory should not be entered. If file already exists, file
2159 * will be overwritten. If no filename is provided, '<em>/tmp/vpe.pcap</em>'
2160 * will be used. Can only be updated if packet capture is off.
2162 * - <b>status</b> - Displays the current status and configured attributes
2163 * associated with a packet capture. If packet capture is in progress,
2164 * '<em>status</em>' also will return the number of packets currently in
2165 * the local buffer. All additional attributes entered on command line
2166 * with '<em>status</em>' will be ignored and not applied.
2169 * Example of how to display the status of capture when off:
2170 * @cliexstart{pcap dispatch trace status}
2171 * max is 100, for any interface to file /tmp/vpe.pcap
2172 * pcap dispatch capture is off...
2174 * Example of how to start a dispatch trace capture:
2175 * @cliexstart{pcap dispatch trace on max 35 file dispatchTrace.pcap}
2176 * pcap dispatc capture on...
2178 * Example of how to display the status of a tx packet capture in progress:
2179 * @cliexstart{pcap tx trace status}
2180 * max is 35, dispatch trace to file /tmp/vppTest.pcap
2181 * pcap tx capture is on: 20 of 35 pkts...
2183 * Example of how to stop a tx packet capture:
2184 * @cliexstart{vppctl pcap dispatch trace off}
2185 * captured 21 pkts...
2186 * saved to /tmp/dispatchTrace.pcap...
2190 VLIB_CLI_COMMAND (pcap_dispatch_trace_command, static) = {
2191 .path = "pcap dispatch trace",
2193 "pcap dispatch trace [on|off] [max <nn>] [file <name>] [status]",
2194 .function = pcap_dispatch_trace_command_fn,
2199 * fd.io coding-style-patch-verification: ON
2202 * eval: (c-set-style "gnu")