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)
56 vlib_frame_bytes (u32 n_scalar_bytes, u32 n_vector_bytes)
60 /* Make room for vlib_frame_t plus scalar arguments. */
61 n_bytes = vlib_frame_vector_byte_offset (n_scalar_bytes);
63 /* Make room for vector arguments.
64 Allocate a few extra slots of vector data to support
65 speculative vector enqueues which overflow vector data in next frame. */
66 #define VLIB_FRAME_SIZE_EXTRA 4
67 n_bytes += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * n_vector_bytes;
69 /* Magic number is first 32bit number after vector data.
70 Used to make sure that vector data is never overrun. */
71 #define VLIB_FRAME_MAGIC (0xabadc0ed)
72 n_bytes += sizeof (u32);
74 /* Pad to cache line. */
75 n_bytes = round_pow2 (n_bytes, CLIB_CACHE_LINE_BYTES);
81 vlib_frame_find_magic (vlib_frame_t * f, vlib_node_t * node)
85 p += vlib_frame_vector_byte_offset (node->scalar_size);
87 p += (VLIB_FRAME_SIZE + VLIB_FRAME_SIZE_EXTRA) * node->vector_size;
92 static inline vlib_frame_size_t *
93 get_frame_size_info (vlib_node_main_t * nm,
94 u32 n_scalar_bytes, u32 n_vector_bytes)
96 #ifdef VLIB_SUPPORTS_ARBITRARY_SCALAR_SIZES
97 uword key = (n_scalar_bytes << 16) | n_vector_bytes;
100 p = hash_get (nm->frame_size_hash, key);
105 i = vec_len (nm->frame_sizes);
106 vec_validate (nm->frame_sizes, i);
107 hash_set (nm->frame_size_hash, key, i);
110 return vec_elt_at_index (nm->frame_sizes, i);
112 ASSERT (vlib_frame_bytes (n_scalar_bytes, n_vector_bytes)
113 == (vlib_frame_bytes (0, 4)));
114 return vec_elt_at_index (nm->frame_sizes, 0);
118 static vlib_frame_t *
119 vlib_frame_alloc_to_node (vlib_main_t * vm, u32 to_node_index,
122 vlib_node_main_t *nm = &vm->node_main;
123 vlib_frame_size_t *fs;
124 vlib_node_t *to_node;
126 u32 l, n, scalar_size, vector_size;
128 to_node = vlib_get_node (vm, to_node_index);
130 scalar_size = to_node->scalar_size;
131 vector_size = to_node->vector_size;
133 fs = get_frame_size_info (nm, scalar_size, vector_size);
134 n = vlib_frame_bytes (scalar_size, vector_size);
135 if ((l = vec_len (fs->free_frames)) > 0)
137 /* Allocate from end of free list. */
138 f = fs->free_frames[l - 1];
139 _vec_len (fs->free_frames) = l - 1;
143 f = clib_mem_alloc_aligned_no_fail (n, VLIB_FRAME_ALIGN);
146 /* Poison frame when debugging. */
148 clib_memset (f, 0xfe, n);
150 /* Insert magic number. */
154 magic = vlib_frame_find_magic (f, to_node);
155 *magic = VLIB_FRAME_MAGIC;
158 f->frame_flags = VLIB_FRAME_IS_ALLOCATED | frame_flags;
160 f->scalar_size = scalar_size;
161 f->vector_size = vector_size;
164 fs->n_alloc_frames += 1;
169 /* Allocate a frame for from FROM_NODE to TO_NODE via TO_NEXT_INDEX.
170 Returns frame index. */
171 static vlib_frame_t *
172 vlib_frame_alloc (vlib_main_t * vm, vlib_node_runtime_t * from_node_runtime,
175 vlib_node_t *from_node;
177 from_node = vlib_get_node (vm, from_node_runtime->node_index);
178 ASSERT (to_next_index < vec_len (from_node->next_nodes));
180 return vlib_frame_alloc_to_node (vm, from_node->next_nodes[to_next_index],
181 /* frame_flags */ 0);
185 vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index)
187 vlib_frame_t *f = vlib_frame_alloc_to_node (vm, to_node_index,
189 VLIB_FRAME_FREE_AFTER_DISPATCH);
190 return vlib_get_frame (vm, f);
194 vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index, vlib_frame_t * f)
196 vlib_pending_frame_t *p;
197 vlib_node_t *to_node;
199 if (f->n_vectors == 0)
202 to_node = vlib_get_node (vm, to_node_index);
204 vec_add2 (vm->node_main.pending_frames, p, 1);
206 f->frame_flags |= VLIB_FRAME_PENDING;
207 p->frame = vlib_get_frame (vm, f);
208 p->node_runtime_index = to_node->runtime_index;
209 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
212 /* Free given frame. */
214 vlib_frame_free (vlib_main_t * vm, vlib_node_runtime_t * r, vlib_frame_t * f)
216 vlib_node_main_t *nm = &vm->node_main;
218 vlib_frame_size_t *fs;
220 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
222 node = vlib_get_node (vm, r->node_index);
223 fs = get_frame_size_info (nm, node->scalar_size, node->vector_size);
225 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
227 /* No next frames may point to freed frame. */
230 vlib_next_frame_t *nf;
231 vec_foreach (nf, vm->node_main.next_frames) ASSERT (nf->frame != f);
234 f->frame_flags &= ~(VLIB_FRAME_IS_ALLOCATED | VLIB_FRAME_NO_APPEND);
236 vec_add1 (fs->free_frames, f);
237 ASSERT (fs->n_alloc_frames > 0);
238 fs->n_alloc_frames -= 1;
241 static clib_error_t *
242 show_frame_stats (vlib_main_t * vm,
243 unformat_input_t * input, vlib_cli_command_t * cmd)
245 vlib_node_main_t *nm = &vm->node_main;
246 vlib_frame_size_t *fs;
248 vlib_cli_output (vm, "%=6s%=12s%=12s", "Size", "# Alloc", "# Free");
249 vec_foreach (fs, nm->frame_sizes)
251 u32 n_alloc = fs->n_alloc_frames;
252 u32 n_free = vec_len (fs->free_frames);
254 if (n_alloc + n_free > 0)
255 vlib_cli_output (vm, "%=6d%=12d%=12d",
256 fs - nm->frame_sizes, n_alloc, n_free);
263 VLIB_CLI_COMMAND (show_frame_stats_cli, static) = {
264 .path = "show vlib frame-allocation",
265 .short_help = "Show node dispatch frame statistics",
266 .function = show_frame_stats,
270 /* Change ownership of enqueue rights to given next node. */
272 vlib_next_frame_change_ownership (vlib_main_t * vm,
273 vlib_node_runtime_t * node_runtime,
276 vlib_node_main_t *nm = &vm->node_main;
277 vlib_next_frame_t *next_frame;
278 vlib_node_t *node, *next_node;
280 node = vec_elt (nm->nodes, node_runtime->node_index);
282 /* Only internal & input nodes are allowed to call other nodes. */
283 ASSERT (node->type == VLIB_NODE_TYPE_INTERNAL
284 || node->type == VLIB_NODE_TYPE_INPUT
285 || node->type == VLIB_NODE_TYPE_PROCESS);
287 ASSERT (vec_len (node->next_nodes) == node_runtime->n_next_nodes);
290 vlib_node_runtime_get_next_frame (vm, node_runtime, next_index);
291 next_node = vec_elt (nm->nodes, node->next_nodes[next_index]);
293 if (next_node->owner_node_index != VLIB_INVALID_NODE_INDEX)
295 /* Get frame from previous owner. */
296 vlib_next_frame_t *owner_next_frame;
297 vlib_next_frame_t tmp;
300 vlib_node_get_next_frame (vm,
301 next_node->owner_node_index,
302 next_node->owner_next_index);
304 /* Swap target next frame with owner's. */
305 tmp = owner_next_frame[0];
306 owner_next_frame[0] = next_frame[0];
310 * If next_frame is already pending, we have to track down
311 * all pending frames and fix their next_frame_index fields.
313 if (next_frame->flags & VLIB_FRAME_PENDING)
315 vlib_pending_frame_t *p;
316 if (next_frame->frame != NULL)
318 vec_foreach (p, nm->pending_frames)
320 if (p->frame == next_frame->frame)
322 p->next_frame_index =
323 next_frame - vm->node_main.next_frames;
331 /* No previous owner. Take ownership. */
332 next_frame->flags |= VLIB_FRAME_OWNER;
335 /* Record new owner. */
336 next_node->owner_node_index = node->index;
337 next_node->owner_next_index = next_index;
339 /* Now we should be owner. */
340 ASSERT (next_frame->flags & VLIB_FRAME_OWNER);
343 /* Make sure that magic number is still there.
344 Otherwise, it is likely that caller has overrun frame arguments. */
346 validate_frame_magic (vlib_main_t * vm,
347 vlib_frame_t * f, vlib_node_t * n, uword next_index)
349 vlib_node_t *next_node = vlib_get_node (vm, n->next_nodes[next_index]);
350 u32 *magic = vlib_frame_find_magic (f, next_node);
351 ASSERT (VLIB_FRAME_MAGIC == magic[0]);
355 vlib_get_next_frame_internal (vlib_main_t * vm,
356 vlib_node_runtime_t * node,
357 u32 next_index, u32 allocate_new_next_frame)
360 vlib_next_frame_t *nf;
363 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
365 /* Make sure this next frame owns right to enqueue to destination frame. */
366 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_OWNER)))
367 vlib_next_frame_change_ownership (vm, node, next_index);
369 /* ??? Don't need valid flag: can use frame_index == ~0 */
370 if (PREDICT_FALSE (!(nf->flags & VLIB_FRAME_IS_ALLOCATED)))
372 nf->frame = vlib_frame_alloc (vm, node, next_index);
373 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
378 /* Has frame been removed from pending vector (e.g. finished dispatching)?
379 If so we can reuse frame. */
380 if ((nf->flags & VLIB_FRAME_PENDING)
381 && !(f->frame_flags & VLIB_FRAME_PENDING))
383 nf->flags &= ~VLIB_FRAME_PENDING;
388 /* Allocate new frame if current one is marked as no-append or
389 it is already full. */
390 n_used = f->n_vectors;
391 if (n_used >= VLIB_FRAME_SIZE || (allocate_new_next_frame && n_used > 0) ||
392 (f->frame_flags & VLIB_FRAME_NO_APPEND))
394 /* Old frame may need to be freed after dispatch, since we'll have
395 two redundant frames from node -> next node. */
396 if (!(nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH))
398 vlib_frame_t *f_old = vlib_get_frame (vm, nf->frame);
399 f_old->frame_flags |= VLIB_FRAME_FREE_AFTER_DISPATCH;
402 /* Allocate new frame to replace full one. */
403 f = nf->frame = vlib_frame_alloc (vm, node, next_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);
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;
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);
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 = nf->frame;
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)
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,
545 uword n_ticks0, uword n_ticks1)
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_counter0_ticks += n_ticks0 +
553 r->perf_counter0_ticks_since_last_overflow;
554 n->stats_total.perf_counter1_ticks += n_ticks1 +
555 r->perf_counter1_ticks_since_last_overflow;
556 n->stats_total.perf_counter_vectors += n_vectors +
557 r->perf_counter_vectors_since_last_overflow;
558 n->stats_total.max_clock = r->max_clock;
559 n->stats_total.max_clock_n = r->max_clock_n;
561 r->calls_since_last_overflow = 0;
562 r->vectors_since_last_overflow = 0;
563 r->clocks_since_last_overflow = 0;
564 r->perf_counter0_ticks_since_last_overflow = 0ULL;
565 r->perf_counter1_ticks_since_last_overflow = 0ULL;
566 r->perf_counter_vectors_since_last_overflow = 0ULL;
569 always_inline void __attribute__ ((unused))
570 vlib_process_sync_stats (vlib_main_t * vm,
572 uword n_calls, uword n_vectors, uword n_clocks,
573 uword n_ticks0, uword n_ticks1)
575 vlib_node_runtime_t *rt = &p->node_runtime;
576 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
577 vlib_node_runtime_sync_stats (vm, rt, n_calls, n_vectors, n_clocks,
579 n->stats_total.suspends += p->n_suspends;
584 vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n)
586 vlib_node_runtime_t *rt;
588 if (n->type == VLIB_NODE_TYPE_PROCESS)
590 /* Nothing to do for PROCESS nodes except in main thread */
591 if (vm != &vlib_global_main)
594 vlib_process_t *p = vlib_get_process_from_node (vm, n);
595 n->stats_total.suspends += p->n_suspends;
597 rt = &p->node_runtime;
601 vec_elt_at_index (vm->node_main.nodes_by_type[n->type],
604 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0, 0, 0);
606 /* Sync up runtime next frame vector counters with main node structure. */
608 vlib_next_frame_t *nf;
610 for (i = 0; i < rt->n_next_nodes; i++)
612 nf = vlib_node_runtime_get_next_frame (vm, rt, i);
613 vec_elt (n->n_vectors_by_next_node, i) +=
614 nf->vectors_since_last_overflow;
615 nf->vectors_since_last_overflow = 0;
621 vlib_node_runtime_update_stats (vlib_main_t * vm,
622 vlib_node_runtime_t * node,
624 uword n_vectors, uword n_clocks,
625 uword n_ticks0, uword n_ticks1)
627 u32 ca0, ca1, v0, v1, cl0, cl1, r;
628 u32 ptick00, ptick01, ptick10, ptick11, pvec0, pvec1;
630 cl0 = cl1 = node->clocks_since_last_overflow;
631 ca0 = ca1 = node->calls_since_last_overflow;
632 v0 = v1 = node->vectors_since_last_overflow;
633 ptick00 = ptick01 = node->perf_counter0_ticks_since_last_overflow;
634 ptick10 = ptick11 = node->perf_counter1_ticks_since_last_overflow;
635 pvec0 = pvec1 = node->perf_counter_vectors_since_last_overflow;
639 cl1 = cl0 + n_clocks;
640 ptick01 = ptick00 + n_ticks0;
641 ptick11 = ptick10 + n_ticks1;
642 pvec1 = pvec0 + n_vectors;
644 node->calls_since_last_overflow = ca1;
645 node->clocks_since_last_overflow = cl1;
646 node->vectors_since_last_overflow = v1;
647 node->perf_counter0_ticks_since_last_overflow = ptick01;
648 node->perf_counter1_ticks_since_last_overflow = ptick11;
649 node->perf_counter_vectors_since_last_overflow = pvec1;
651 node->max_clock_n = node->max_clock > n_clocks ?
652 node->max_clock_n : n_vectors;
653 node->max_clock = node->max_clock > n_clocks ? node->max_clock : n_clocks;
655 r = vlib_node_runtime_update_main_loop_vector_stats (vm, node, n_vectors);
657 if (PREDICT_FALSE (ca1 < ca0 || v1 < v0 || cl1 < cl0) || (ptick01 < ptick00)
658 || (ptick11 < ptick10) || (pvec1 < pvec0))
660 node->calls_since_last_overflow = ca0;
661 node->clocks_since_last_overflow = cl0;
662 node->vectors_since_last_overflow = v0;
663 node->perf_counter0_ticks_since_last_overflow = ptick00;
664 node->perf_counter1_ticks_since_last_overflow = ptick10;
665 node->perf_counter_vectors_since_last_overflow = pvec0;
667 vlib_node_runtime_sync_stats (vm, node, n_calls, n_vectors, n_clocks,
675 vlib_node_runtime_perf_counter (vlib_main_t * vm, u64 * pmc0, u64 * pmc1,
676 vlib_node_runtime_t * node,
677 vlib_frame_t * frame, int before_or_after)
681 if (PREDICT_FALSE (vec_len (vm->vlib_node_runtime_perf_counter_cbs) != 0))
682 clib_call_callbacks (vm->vlib_node_runtime_perf_counter_cbs, vm, pmc0,
683 pmc1, node, frame, before_or_after);
687 vlib_process_update_stats (vlib_main_t * vm,
689 uword n_calls, uword n_vectors, uword n_clocks)
691 vlib_node_runtime_update_stats (vm, &p->node_runtime,
692 n_calls, n_vectors, n_clocks, 0ULL, 0ULL);
695 static clib_error_t *
696 vlib_cli_elog_clear (vlib_main_t * vm,
697 unformat_input_t * input, vlib_cli_command_t * cmd)
699 elog_reset_buffer (&vm->elog_main);
704 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
705 .path = "event-logger clear",
706 .short_help = "Clear the event log",
707 .function = vlib_cli_elog_clear,
712 static clib_error_t *
713 elog_save_buffer (vlib_main_t * vm,
714 unformat_input_t * input, vlib_cli_command_t * cmd)
716 elog_main_t *em = &vm->elog_main;
717 char *file, *chroot_file;
718 clib_error_t *error = 0;
720 if (!unformat (input, "%s", &file))
722 vlib_cli_output (vm, "expected file name, got `%U'",
723 format_unformat_error, input);
727 /* It's fairly hard to get "../oopsie" through unformat; just in case */
728 if (strstr (file, "..") || index (file, '/'))
730 vlib_cli_output (vm, "illegal characters in filename '%s'", file);
734 chroot_file = (char *) format (0, "/tmp/%s%c", file, 0);
738 vlib_cli_output (vm, "Saving %wd of %wd events to %s",
739 elog_n_events_in_buffer (em),
740 elog_buffer_capacity (em), chroot_file);
742 vlib_worker_thread_barrier_sync (vm);
743 error = elog_write_file (em, chroot_file, 1 /* flush ring */ );
744 vlib_worker_thread_barrier_release (vm);
745 vec_free (chroot_file);
750 elog_post_mortem_dump (void)
752 vlib_main_t *vm = &vlib_global_main;
753 elog_main_t *em = &vm->elog_main;
757 if (!vm->elog_post_mortem_dump)
760 filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0);
761 error = elog_write_file (em, (char *) filename, 1 /* flush ring */ );
763 clib_error_report (error);
768 VLIB_CLI_COMMAND (elog_save_cli, static) = {
769 .path = "event-logger save",
770 .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
771 .function = elog_save_buffer,
775 static clib_error_t *
776 elog_stop (vlib_main_t * vm,
777 unformat_input_t * input, vlib_cli_command_t * cmd)
779 elog_main_t *em = &vm->elog_main;
781 em->n_total_events_disable_limit = em->n_total_events;
783 vlib_cli_output (vm, "Stopped the event logger...");
788 VLIB_CLI_COMMAND (elog_stop_cli, static) = {
789 .path = "event-logger stop",
790 .short_help = "Stop the event-logger",
791 .function = elog_stop,
795 static clib_error_t *
796 elog_restart (vlib_main_t * vm,
797 unformat_input_t * input, vlib_cli_command_t * cmd)
799 elog_main_t *em = &vm->elog_main;
801 em->n_total_events_disable_limit = ~0;
803 vlib_cli_output (vm, "Restarted the event logger...");
808 VLIB_CLI_COMMAND (elog_restart_cli, static) = {
809 .path = "event-logger restart",
810 .short_help = "Restart the event-logger",
811 .function = elog_restart,
815 static clib_error_t *
816 elog_resize (vlib_main_t * vm,
817 unformat_input_t * input, vlib_cli_command_t * cmd)
819 elog_main_t *em = &vm->elog_main;
822 /* Stop the parade */
823 elog_reset_buffer (&vm->elog_main);
825 if (unformat (input, "%d", &tmp))
827 elog_alloc (em, tmp);
828 em->n_total_events_disable_limit = ~0;
831 return clib_error_return (0, "Must specify how many events in the ring");
833 vlib_cli_output (vm, "Resized ring and restarted the event logger...");
838 VLIB_CLI_COMMAND (elog_resize_cli, static) = {
839 .path = "event-logger resize",
840 .short_help = "event-logger resize <nnn>",
841 .function = elog_resize,
845 #endif /* CLIB_UNIX */
848 elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
850 elog_main_t *em = &vm->elog_main;
851 elog_event_t *e, *es;
854 /* Show events in VLIB time since log clock starts after VLIB clock. */
855 dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
856 * vm->clib_time.seconds_per_clock;
858 es = elog_peek_events (em);
859 vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es),
861 em->n_total_events < em->n_total_events_disable_limit ?
862 "running" : "stopped");
865 vlib_cli_output (vm, "%18.9f: %U",
866 e->time + dt, format_elog_event, em, e);
868 if (n_events_to_show == 0)
875 static clib_error_t *
876 elog_show_buffer (vlib_main_t * vm,
877 unformat_input_t * input, vlib_cli_command_t * cmd)
879 u32 n_events_to_show;
880 clib_error_t *error = 0;
882 n_events_to_show = 250;
883 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
885 if (unformat (input, "%d", &n_events_to_show))
887 else if (unformat (input, "all"))
888 n_events_to_show = ~0;
890 return unformat_parse_error (input);
892 elog_show_buffer_internal (vm, n_events_to_show);
897 VLIB_CLI_COMMAND (elog_show_cli, static) = {
898 .path = "show event-logger",
899 .short_help = "Show event logger info",
900 .function = elog_show_buffer,
905 vlib_gdb_show_event_log (void)
907 elog_show_buffer_internal (vlib_get_main (), (u32) ~ 0);
911 vlib_elog_main_loop_event (vlib_main_t * vm,
913 u64 time, u32 n_vectors, u32 is_return)
915 vlib_main_t *evm = &vlib_global_main;
916 elog_main_t *em = &evm->elog_main;
917 int enabled = evm->elog_trace_graph_dispatch |
918 evm->elog_trace_graph_circuit;
920 if (PREDICT_FALSE (enabled && n_vectors))
922 if (PREDICT_FALSE (!elog_is_enabled (em)))
924 evm->elog_trace_graph_dispatch = 0;
925 evm->elog_trace_graph_circuit = 0;
929 (evm->elog_trace_graph_dispatch ||
930 (evm->elog_trace_graph_circuit &&
931 node_index == evm->elog_trace_graph_circuit_node_index)))
935 vec_elt_at_index (is_return
936 ? evm->node_return_elog_event_types
937 : evm->node_call_elog_event_types,
941 &vlib_worker_threads[vm->thread_index].elog_track
942 : &em->default_track),
943 /* data to log */ n_vectors);
948 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
949 void (*vlib_buffer_trace_trajectory_cb) (vlib_buffer_t * b, u32 node_index);
950 void (*vlib_buffer_trace_trajectory_init_cb) (vlib_buffer_t * b);
953 vlib_buffer_trace_trajectory_init (vlib_buffer_t * b)
955 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_init_cb != 0))
957 (*vlib_buffer_trace_trajectory_init_cb) (b);
964 add_trajectory_trace (vlib_buffer_t * b, u32 node_index)
966 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
967 if (PREDICT_TRUE (vlib_buffer_trace_trajectory_cb != 0))
969 (*vlib_buffer_trace_trajectory_cb) (b, node_index);
974 u8 *format_vnet_buffer_flags (u8 * s, va_list * args) __attribute__ ((weak));
976 format_vnet_buffer_flags (u8 * s, va_list * args)
978 s = format (s, "BUG STUB %s", __FUNCTION__);
982 u8 *format_vnet_buffer_opaque (u8 * s, va_list * args) __attribute__ ((weak));
984 format_vnet_buffer_opaque (u8 * s, va_list * args)
986 s = format (s, "BUG STUB %s", __FUNCTION__);
990 u8 *format_vnet_buffer_opaque2 (u8 * s, va_list * args)
991 __attribute__ ((weak));
993 format_vnet_buffer_opaque2 (u8 * s, va_list * args)
995 s = format (s, "BUG STUB %s", __FUNCTION__);
1000 format_buffer_metadata (u8 * s, va_list * args)
1002 vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *);
1004 s = format (s, "flags: %U\n", format_vnet_buffer_flags, b);
1005 s = format (s, "current_data: %d, current_length: %d\n",
1006 (i32) (b->current_data), (i32) (b->current_length));
1009 "current_config_index/punt_reason: %d, flow_id: %x, next_buffer: %x\n",
1010 b->current_config_index, b->flow_id, b->next_buffer);
1012 format (s, "error: %d, ref_count: %d, buffer_pool_index: %d\n",
1013 (u32) (b->error), (u32) (b->ref_count),
1014 (u32) (b->buffer_pool_index));
1016 format (s, "trace_handle: 0x%x, len_not_first_buf: %d\n", b->trace_handle,
1017 b->total_length_not_including_first_buffer);
1021 #define A(x) vec_add1(vm->pcap_buffer, (x))
1024 dispatch_pcap_trace (vlib_main_t * vm,
1025 vlib_node_runtime_t * node, vlib_frame_t * frame)
1028 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **bufp, *b;
1029 pcap_main_t *pm = &vlib_global_main.dispatch_pcap_main;
1030 vlib_trace_main_t *tm = &vm->trace_main;
1034 f64 time_now = vlib_time_now (vm);
1039 /* Input nodes don't have frames yet */
1040 if (frame == 0 || frame->n_vectors == 0)
1043 from = vlib_frame_vector_args (frame);
1044 vlib_get_buffers (vm, from, bufs, frame->n_vectors);
1047 n = vlib_get_node (vm, node->node_index);
1049 for (i = 0; i < frame->n_vectors; i++)
1051 if (PREDICT_TRUE (pm->n_packets_captured < pm->n_packets_to_capture))
1055 vec_reset_length (vm->pcap_buffer);
1058 /* Version, flags */
1059 A ((u8) VLIB_PCAP_MAJOR_VERSION);
1060 A ((u8) VLIB_PCAP_MINOR_VERSION);
1061 A (0 /* string_count */ );
1062 A (n->protocol_hint);
1064 /* Buffer index (big endian) */
1065 A ((from[i] >> 24) & 0xff);
1066 A ((from[i] >> 16) & 0xff);
1067 A ((from[i] >> 8) & 0xff);
1068 A ((from[i] >> 0) & 0xff);
1070 /* Node name, NULL-terminated ASCII */
1071 vm->pcap_buffer = format (vm->pcap_buffer, "%v%c", n->name, 0);
1074 vm->pcap_buffer = format (vm->pcap_buffer, "%U%c",
1075 format_buffer_metadata, b, 0);
1077 vm->pcap_buffer = format (vm->pcap_buffer, "%U%c",
1078 format_vnet_buffer_opaque, b, 0);
1080 vm->pcap_buffer = format (vm->pcap_buffer, "%U%c",
1081 format_vnet_buffer_opaque2, b, 0);
1084 /* Is this packet traced? */
1085 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
1087 vlib_trace_header_t **h
1088 = pool_elt_at_index (tm->trace_buffer_pool,
1089 vlib_buffer_get_trace_index (b));
1091 vm->pcap_buffer = format (vm->pcap_buffer, "%U%c",
1092 format_vlib_trace, vm, h[0], 0);
1096 /* Save the string count */
1097 vm->pcap_buffer[2] = string_count;
1099 /* Figure out how many bytes in the pcap trace */
1100 capture_size = vec_len (vm->pcap_buffer) +
1101 +vlib_buffer_length_in_chain (vm, b);
1103 clib_spinlock_lock_if_init (&pm->lock);
1104 n_left = clib_min (capture_size, 16384);
1105 d = pcap_add_packet (pm, time_now, n_left, capture_size);
1107 /* Copy the header */
1108 clib_memcpy_fast (d, vm->pcap_buffer, vec_len (vm->pcap_buffer));
1109 d += vec_len (vm->pcap_buffer);
1112 (vlib_buffer_length_in_chain (vm, b),
1113 (16384 - vec_len (vm->pcap_buffer)));
1114 /* Copy the packet data */
1117 u32 copy_length = clib_min ((u32) n_left, b->current_length);
1118 clib_memcpy_fast (d, b->data + b->current_data, copy_length);
1119 n_left -= b->current_length;
1122 d += b->current_length;
1123 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
1124 b = vlib_get_buffer (vm, b->next_buffer);
1126 clib_spinlock_unlock_if_init (&pm->lock);
1131 static_always_inline u64
1132 dispatch_node (vlib_main_t * vm,
1133 vlib_node_runtime_t * node,
1134 vlib_node_type_t type,
1135 vlib_node_state_t dispatch_state,
1136 vlib_frame_t * frame, u64 last_time_stamp)
1140 vlib_node_main_t *nm = &vm->node_main;
1141 vlib_next_frame_t *nf;
1142 u64 pmc_before[2], pmc_after[2], pmc_delta[2];
1146 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1147 ASSERT (n->type == type);
1150 /* Only non-internal nodes may be disabled. */
1151 if (type != VLIB_NODE_TYPE_INTERNAL && node->state != dispatch_state)
1153 ASSERT (type != VLIB_NODE_TYPE_INTERNAL);
1154 return last_time_stamp;
1157 if ((type == VLIB_NODE_TYPE_PRE_INPUT || type == VLIB_NODE_TYPE_INPUT)
1158 && dispatch_state != VLIB_NODE_STATE_INTERRUPT)
1160 u32 c = node->input_main_loops_per_call;
1161 /* Only call node when count reaches zero. */
1164 node->input_main_loops_per_call = c - 1;
1165 return last_time_stamp;
1169 /* Speculatively prefetch next frames. */
1170 if (node->n_next_nodes > 0)
1172 nf = vec_elt_at_index (nm->next_frames, node->next_frame_index);
1173 CLIB_PREFETCH (nf, 4 * sizeof (nf[0]), WRITE);
1176 vm->cpu_time_last_node_dispatch = last_time_stamp;
1178 vlib_elog_main_loop_event (vm, node->node_index,
1179 last_time_stamp, frame ? frame->n_vectors : 0,
1182 vlib_node_runtime_perf_counter (vm, &pmc_before[0], &pmc_before[1],
1183 node, frame, 0 /* before */ );
1186 * Turn this on if you run into
1187 * "bad monkey" contexts, and you want to know exactly
1188 * which nodes they've visited... See ixge.c...
1190 if (VLIB_BUFFER_TRACE_TRAJECTORY && frame)
1194 from = vlib_frame_vector_args (frame);
1195 for (i = 0; i < frame->n_vectors; i++)
1197 vlib_buffer_t *b = vlib_get_buffer (vm, from[i]);
1198 add_trajectory_trace (b, node->node_index);
1200 if (PREDICT_FALSE (vm->dispatch_pcap_enable))
1201 dispatch_pcap_trace (vm, node, frame);
1202 n = node->function (vm, node, frame);
1206 if (PREDICT_FALSE (vm->dispatch_pcap_enable))
1207 dispatch_pcap_trace (vm, node, frame);
1208 n = node->function (vm, node, frame);
1211 t = clib_cpu_time_now ();
1214 * To validate accounting: pmc_delta = t - pmc_before;
1215 * perf ticks should equal clocks/pkt...
1217 vlib_node_runtime_perf_counter (vm, &pmc_after[0], &pmc_after[1], node,
1218 frame, 1 /* after */ );
1220 pmc_delta[0] = pmc_after[0] - pmc_before[0];
1221 pmc_delta[1] = pmc_after[1] - pmc_before[1];
1223 vlib_elog_main_loop_event (vm, node->node_index, t, n, 1 /* is_after */ );
1225 vm->main_loop_vectors_processed += n;
1226 vm->main_loop_nodes_processed += n > 0;
1228 v = vlib_node_runtime_update_stats (vm, node,
1231 /* n_clocks */ t - last_time_stamp,
1232 pmc_delta[0] /* PMC0 */ ,
1233 pmc_delta[1] /* PMC1 */ );
1235 /* When in interrupt mode and vector rate crosses threshold switch to
1237 if (PREDICT_FALSE ((dispatch_state == VLIB_NODE_STATE_INTERRUPT)
1238 || (dispatch_state == VLIB_NODE_STATE_POLLING
1241 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))))
1244 ELOG_TYPE_DECLARE (e) =
1246 .function = (char *) __FUNCTION__,
1247 .format = "%s vector length %d, switching to %s",
1248 .format_args = "T4i4t4",
1249 .n_enum_strings = 2,
1251 "interrupt", "polling",
1257 u32 node_name, vector_length, is_polling;
1260 if ((dispatch_state == VLIB_NODE_STATE_INTERRUPT
1261 && v >= nm->polling_threshold_vector_length) &&
1263 VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
1265 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1266 n->state = VLIB_NODE_STATE_POLLING;
1267 node->state = VLIB_NODE_STATE_POLLING;
1269 ~VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1270 node->flags |= VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1271 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] -= 1;
1272 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] += 1;
1274 if (PREDICT_FALSE (vlib_global_main.elog_trace_graph_dispatch))
1276 vlib_worker_thread_t *w = vlib_worker_threads
1279 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1281 ed->node_name = n->name_elog_string;
1282 ed->vector_length = v;
1286 else if (dispatch_state == VLIB_NODE_STATE_POLLING
1287 && v <= nm->interrupt_threshold_vector_length)
1289 vlib_node_t *n = vlib_get_node (vm, node->node_index);
1291 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE)
1293 /* Switch to interrupt mode after dispatch in polling one more time.
1294 This allows driver to re-enable interrupts. */
1295 n->state = VLIB_NODE_STATE_INTERRUPT;
1296 node->state = VLIB_NODE_STATE_INTERRUPT;
1298 ~VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
1299 nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] -= 1;
1300 nm->input_node_counts_by_state[VLIB_NODE_STATE_INTERRUPT] += 1;
1305 vlib_worker_thread_t *w = vlib_worker_threads
1308 VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
1309 if (PREDICT_FALSE (vlib_global_main.elog_trace_graph_dispatch))
1311 ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e,
1313 ed->node_name = n->name_elog_string;
1314 ed->vector_length = v;
1325 dispatch_pending_node (vlib_main_t * vm, uword pending_frame_index,
1326 u64 last_time_stamp)
1328 vlib_node_main_t *nm = &vm->node_main;
1330 vlib_next_frame_t *nf, nf_dummy;
1331 vlib_node_runtime_t *n;
1332 vlib_frame_t *restore_frame;
1333 vlib_pending_frame_t *p;
1335 /* See comment below about dangling references to nm->pending_frames */
1336 p = nm->pending_frames + pending_frame_index;
1338 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1339 p->node_runtime_index);
1341 f = vlib_get_frame (vm, p->frame);
1342 if (p->next_frame_index == VLIB_PENDING_FRAME_NO_NEXT_FRAME)
1344 /* No next frame: so use dummy on stack. */
1346 nf->flags = f->frame_flags & VLIB_NODE_FLAG_TRACE;
1350 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1352 ASSERT (f->frame_flags & VLIB_FRAME_IS_ALLOCATED);
1354 /* Force allocation of new frame while current frame is being
1356 restore_frame = NULL;
1357 if (nf->frame == p->frame)
1360 nf->flags &= ~VLIB_FRAME_IS_ALLOCATED;
1361 if (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH))
1362 restore_frame = p->frame;
1365 /* Frame must be pending. */
1366 ASSERT (f->frame_flags & VLIB_FRAME_PENDING);
1367 ASSERT (f->n_vectors > 0);
1369 /* Copy trace flag from next frame to node.
1370 Trace flag indicates that at least one vector in the dispatched
1372 n->flags &= ~VLIB_NODE_FLAG_TRACE;
1373 n->flags |= (nf->flags & VLIB_FRAME_TRACE) ? VLIB_NODE_FLAG_TRACE : 0;
1374 nf->flags &= ~VLIB_FRAME_TRACE;
1376 last_time_stamp = dispatch_node (vm, n,
1377 VLIB_NODE_TYPE_INTERNAL,
1378 VLIB_NODE_STATE_POLLING,
1379 f, last_time_stamp);
1380 /* Internal node vector-rate accounting, for summary stats */
1381 vm->internal_node_vectors += f->n_vectors;
1382 vm->internal_node_calls++;
1383 vm->internal_node_last_vectors_per_main_loop =
1384 (f->n_vectors > vm->internal_node_last_vectors_per_main_loop) ?
1385 f->n_vectors : vm->internal_node_last_vectors_per_main_loop;
1387 f->frame_flags &= ~(VLIB_FRAME_PENDING | VLIB_FRAME_NO_APPEND);
1389 /* Frame is ready to be used again, so restore it. */
1390 if (restore_frame != NULL)
1393 * We musn't restore a frame that is flagged to be freed. This
1394 * shouldn't happen since frames to be freed post dispatch are
1395 * those used when the to-node frame becomes full i.e. they form a
1396 * sort of queue of frames to a single node. If we get here then
1397 * the to-node frame and the pending frame *were* the same, and so
1398 * we removed the to-node frame. Therefore this frame is no
1399 * longer part of the queue for that node and hence it cannot be
1402 ASSERT (!(f->frame_flags & VLIB_FRAME_FREE_AFTER_DISPATCH));
1405 * NB: dispatching node n can result in the creation and scheduling
1406 * of new frames, and hence in the reallocation of nm->pending_frames.
1407 * Recompute p, or no supper. This was broken for more than 10 years.
1409 p = nm->pending_frames + pending_frame_index;
1412 * p->next_frame_index can change during node dispatch if node
1413 * function decides to change graph hook up.
1415 nf = vec_elt_at_index (nm->next_frames, p->next_frame_index);
1416 nf->flags |= VLIB_FRAME_IS_ALLOCATED;
1418 if (NULL == nf->frame)
1420 /* no new frame has been assigned to this node, use the saved one */
1421 nf->frame = restore_frame;
1426 /* The node has gained a frame, implying packets from the current frame
1427 were re-queued to this same node. we don't need the saved one
1429 vlib_frame_free (vm, n, f);
1434 if (f->frame_flags & VLIB_FRAME_FREE_AFTER_DISPATCH)
1436 ASSERT (!(n->flags & VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH));
1437 vlib_frame_free (vm, n, f);
1441 return last_time_stamp;
1445 vlib_process_stack_is_valid (vlib_process_t * p)
1447 return p->stack[0] == VLIB_PROCESS_STACK_MAGIC;
1453 vlib_process_t *process;
1454 vlib_frame_t *frame;
1455 } vlib_process_bootstrap_args_t;
1457 /* Called in process stack. */
1459 vlib_process_bootstrap (uword _a)
1461 vlib_process_bootstrap_args_t *a;
1463 vlib_node_runtime_t *node;
1468 a = uword_to_pointer (_a, vlib_process_bootstrap_args_t *);
1473 node = &p->node_runtime;
1475 n = node->function (vm, node, f);
1477 ASSERT (vlib_process_stack_is_valid (p));
1479 clib_longjmp (&p->return_longjmp, n);
1484 /* Called in main stack. */
1485 static_always_inline uword
1486 vlib_process_startup (vlib_main_t * vm, vlib_process_t * p, vlib_frame_t * f)
1488 vlib_process_bootstrap_args_t a;
1495 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1496 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1497 r = clib_calljmp (vlib_process_bootstrap, pointer_to_uword (&a),
1498 (void *) p->stack + (1 << p->log2_n_stack_bytes));
1503 static_always_inline uword
1504 vlib_process_resume (vlib_process_t * p)
1507 p->flags &= ~(VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1508 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
1509 | VLIB_PROCESS_RESUME_PENDING);
1510 r = clib_setjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1511 if (r == VLIB_PROCESS_RETURN_LONGJMP_RETURN)
1512 clib_longjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_RESUME);
1517 dispatch_process (vlib_main_t * vm,
1518 vlib_process_t * p, vlib_frame_t * f, u64 last_time_stamp)
1520 vlib_node_main_t *nm = &vm->node_main;
1521 vlib_node_runtime_t *node_runtime = &p->node_runtime;
1522 vlib_node_t *node = vlib_get_node (vm, node_runtime->node_index);
1523 u32 old_process_index;
1525 uword n_vectors, is_suspend;
1527 if (node->state != VLIB_NODE_STATE_POLLING
1528 || (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1529 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)))
1530 return last_time_stamp;
1532 p->flags |= VLIB_PROCESS_IS_RUNNING;
1534 t = last_time_stamp;
1535 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1536 f ? f->n_vectors : 0, /* is_after */ 0);
1538 /* Save away current process for suspend. */
1539 old_process_index = nm->current_process_index;
1540 nm->current_process_index = node->runtime_index;
1542 n_vectors = vlib_process_startup (vm, p, f);
1544 nm->current_process_index = old_process_index;
1546 ASSERT (n_vectors != VLIB_PROCESS_RETURN_LONGJMP_RETURN);
1547 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1550 vlib_pending_frame_t *pf;
1553 pool_get (nm->suspended_process_frames, pf);
1554 pf->node_runtime_index = node->runtime_index;
1556 pf->next_frame_index = ~0;
1559 p->suspended_process_frame_index = pf - nm->suspended_process_frames;
1561 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1563 TWT (tw_timer_wheel) * tw =
1564 (TWT (tw_timer_wheel) *) nm->timing_wheel;
1565 p->stop_timer_handle =
1566 TW (tw_timer_start) (tw,
1567 vlib_timing_wheel_data_set_suspended_process
1568 (node->runtime_index) /* [sic] pool idex */ ,
1570 p->resume_clock_interval);
1574 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1576 t = clib_cpu_time_now ();
1578 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, is_suspend,
1581 vlib_process_update_stats (vm, p,
1582 /* n_calls */ !is_suspend,
1583 /* n_vectors */ n_vectors,
1584 /* n_clocks */ t - last_time_stamp);
1590 vlib_start_process (vlib_main_t * vm, uword process_index)
1592 vlib_node_main_t *nm = &vm->node_main;
1593 vlib_process_t *p = vec_elt (nm->processes, process_index);
1594 dispatch_process (vm, p, /* frame */ 0, /* cpu_time_now */ 0);
1598 dispatch_suspended_process (vlib_main_t * vm,
1599 uword process_index, u64 last_time_stamp)
1601 vlib_node_main_t *nm = &vm->node_main;
1602 vlib_node_runtime_t *node_runtime;
1606 vlib_pending_frame_t *pf;
1607 u64 t, n_vectors, is_suspend;
1609 t = last_time_stamp;
1611 p = vec_elt (nm->processes, process_index);
1612 if (PREDICT_FALSE (!(p->flags & VLIB_PROCESS_IS_RUNNING)))
1613 return last_time_stamp;
1615 ASSERT (p->flags & (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
1616 | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT));
1618 pf = pool_elt_at_index (nm->suspended_process_frames,
1619 p->suspended_process_frame_index);
1621 node_runtime = &p->node_runtime;
1622 node = vlib_get_node (vm, node_runtime->node_index);
1625 vlib_elog_main_loop_event (vm, node_runtime->node_index, t,
1626 f ? f->n_vectors : 0, /* is_after */ 0);
1628 /* Save away current process for suspend. */
1629 nm->current_process_index = node->runtime_index;
1631 n_vectors = vlib_process_resume (p);
1632 t = clib_cpu_time_now ();
1634 nm->current_process_index = ~0;
1636 is_suspend = n_vectors == VLIB_PROCESS_RETURN_LONGJMP_SUSPEND;
1639 /* Suspend it again. */
1642 if (p->flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
1644 p->stop_timer_handle =
1645 TW (tw_timer_start) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
1646 vlib_timing_wheel_data_set_suspended_process
1647 (node->runtime_index) /* [sic] pool idex */ ,
1649 p->resume_clock_interval);
1654 p->flags &= ~VLIB_PROCESS_IS_RUNNING;
1655 pool_put_index (nm->suspended_process_frames,
1656 p->suspended_process_frame_index);
1657 p->suspended_process_frame_index = ~0;
1660 t = clib_cpu_time_now ();
1661 vlib_elog_main_loop_event (vm, node_runtime->node_index, t, !is_suspend,
1664 vlib_process_update_stats (vm, p,
1665 /* n_calls */ !is_suspend,
1666 /* n_vectors */ n_vectors,
1667 /* n_clocks */ t - last_time_stamp);
1672 void vl_api_send_pending_rpc_requests (vlib_main_t *) __attribute__ ((weak));
1674 vl_api_send_pending_rpc_requests (vlib_main_t * vm)
1679 static_always_inline void
1680 vlib_main_or_worker_loop (vlib_main_t * vm, int is_main)
1682 vlib_node_main_t *nm = &vm->node_main;
1683 vlib_thread_main_t *tm = vlib_get_thread_main ();
1687 vlib_frame_queue_main_t *fqm;
1688 u32 *last_node_runtime_indices = 0;
1689 u32 frame_queue_check_counter = 0;
1691 /* Initialize pending node vector. */
1694 vec_resize (nm->pending_frames, 32);
1695 _vec_len (nm->pending_frames) = 0;
1698 /* Mark time of main loop start. */
1701 cpu_time_now = vm->clib_time.last_cpu_time;
1702 vm->cpu_time_main_loop_start = cpu_time_now;
1705 cpu_time_now = clib_cpu_time_now ();
1707 /* Pre-allocate interupt runtime indices and lock. */
1708 vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
1709 vec_alloc (last_node_runtime_indices, 32);
1711 clib_spinlock_init (&nm->pending_interrupt_lock);
1713 /* Pre-allocate expired nodes. */
1714 if (!nm->polling_threshold_vector_length)
1715 nm->polling_threshold_vector_length = 10;
1716 if (!nm->interrupt_threshold_vector_length)
1717 nm->interrupt_threshold_vector_length = 5;
1719 vm->cpu_id = clib_get_current_cpu_id ();
1720 vm->numa_node = clib_get_current_numa_node ();
1721 os_set_numa_index (vm->numa_node);
1723 /* Start all processes. */
1729 * Perform an initial barrier sync. Pays no attention to
1730 * the barrier sync hold-down timer scheme, which won't work
1731 * at this point in time.
1733 vlib_worker_thread_initial_barrier_sync_and_release (vm);
1735 nm->current_process_index = ~0;
1736 for (i = 0; i < vec_len (nm->processes); i++)
1737 cpu_time_now = dispatch_process (vm, nm->processes[i], /* frame */ 0,
1743 vlib_node_runtime_t *n;
1745 if (PREDICT_FALSE (_vec_len (vm->pending_rpc_requests) > 0))
1748 vl_api_send_pending_rpc_requests (vm);
1753 vlib_worker_thread_barrier_check ();
1754 if (PREDICT_FALSE (vm->check_frame_queues +
1755 frame_queue_check_counter))
1759 if (vm->check_frame_queues)
1761 frame_queue_check_counter = 100;
1762 vm->check_frame_queues = 0;
1765 vec_foreach (fqm, tm->frame_queue_mains)
1766 processed += vlib_frame_queue_dequeue (vm, fqm);
1768 /* No handoff queue work found? */
1770 frame_queue_check_counter = 100;
1772 frame_queue_check_counter--;
1774 if (PREDICT_FALSE (vec_len (vm->worker_thread_main_loop_callbacks)))
1775 clib_call_callbacks (vm->worker_thread_main_loop_callbacks, vm);
1778 /* Process pre-input nodes. */
1779 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1780 cpu_time_now = dispatch_node (vm, n,
1781 VLIB_NODE_TYPE_PRE_INPUT,
1782 VLIB_NODE_STATE_POLLING,
1786 /* Next process input nodes. */
1787 vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1788 cpu_time_now = dispatch_node (vm, n,
1789 VLIB_NODE_TYPE_INPUT,
1790 VLIB_NODE_STATE_POLLING,
1794 if (PREDICT_TRUE (is_main && vm->queue_signal_pending == 0))
1795 vm->queue_signal_callback (vm);
1797 /* Next handle interrupts. */
1799 /* unlocked read, for performance */
1800 uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1802 if (PREDICT_FALSE (l > 0))
1807 clib_spinlock_lock (&nm->pending_interrupt_lock);
1808 /* Re-read w/ lock held, in case another thread added an item */
1809 l = _vec_len (nm->pending_interrupt_node_runtime_indices);
1812 tmp = nm->pending_interrupt_node_runtime_indices;
1813 nm->pending_interrupt_node_runtime_indices =
1814 last_node_runtime_indices;
1815 last_node_runtime_indices = tmp;
1816 _vec_len (last_node_runtime_indices) = 0;
1818 clib_spinlock_unlock (&nm->pending_interrupt_lock);
1819 for (i = 0; i < l; i++)
1821 n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1822 last_node_runtime_indices[i]);
1824 dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
1825 VLIB_NODE_STATE_INTERRUPT,
1831 /* Input nodes may have added work to the pending vector.
1832 Process pending vector until there is nothing left.
1833 All pending vectors will be processed from input -> output. */
1834 for (i = 0; i < _vec_len (nm->pending_frames); i++)
1835 cpu_time_now = dispatch_pending_node (vm, i, cpu_time_now);
1836 /* Reset pending vector for next iteration. */
1837 _vec_len (nm->pending_frames) = 0;
1842 ELOG_TYPE_DECLARE (es) =
1844 .format = "process tw start",
1847 ELOG_TYPE_DECLARE (ee) =
1849 .format = "process tw end: %d",
1850 .format_args = "i4",
1859 /* Check if process nodes have expired from timing wheel. */
1860 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1862 if (PREDICT_FALSE (vm->elog_trace_graph_dispatch))
1863 ed = ELOG_DATA (&vlib_global_main.elog_main, es);
1865 nm->data_from_advancing_timing_wheel =
1866 TW (tw_timer_expire_timers_vec)
1867 ((TWT (tw_timer_wheel) *) nm->timing_wheel, vlib_time_now (vm),
1868 nm->data_from_advancing_timing_wheel);
1870 ASSERT (nm->data_from_advancing_timing_wheel != 0);
1872 if (PREDICT_FALSE (vm->elog_trace_graph_dispatch))
1874 ed = ELOG_DATA (&vlib_global_main.elog_main, ee);
1876 _vec_len (nm->data_from_advancing_timing_wheel);
1880 (_vec_len (nm->data_from_advancing_timing_wheel) > 0))
1884 for (i = 0; i < _vec_len (nm->data_from_advancing_timing_wheel);
1887 u32 d = nm->data_from_advancing_timing_wheel[i];
1888 u32 di = vlib_timing_wheel_data_get_index (d);
1890 if (vlib_timing_wheel_data_is_timed_event (d))
1892 vlib_signal_timed_event_data_t *te =
1893 pool_elt_at_index (nm->signal_timed_event_data_pool,
1896 vlib_get_node (vm, te->process_node_index);
1898 vec_elt (nm->processes, n->runtime_index);
1901 vlib_process_signal_event_helper (nm, n, p,
1902 te->event_type_index,
1904 te->n_data_elt_bytes);
1905 if (te->n_data_bytes < sizeof (te->inline_event_data))
1906 clib_memcpy_fast (data, te->inline_event_data,
1910 clib_memcpy_fast (data, te->event_data_as_vector,
1912 vec_free (te->event_data_as_vector);
1914 pool_put (nm->signal_timed_event_data_pool, te);
1918 cpu_time_now = clib_cpu_time_now ();
1920 dispatch_suspended_process (vm, di, cpu_time_now);
1923 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
1926 vlib_increment_main_loop_counter (vm);
1927 /* Record time stamp in case there are no enabled nodes and above
1928 calls do not update time stamp. */
1929 cpu_time_now = clib_cpu_time_now ();
1930 vm->loops_this_reporting_interval++;
1931 now = clib_time_now_internal (&vm->clib_time, cpu_time_now);
1932 /* Time to update loops_per_second? */
1933 if (PREDICT_FALSE (now >= vm->loop_interval_end))
1935 /* Next sample ends in 20ms */
1936 if (vm->loop_interval_start)
1938 f64 this_loops_per_second;
1940 this_loops_per_second =
1941 ((f64) vm->loops_this_reporting_interval) / (now -
1942 vm->loop_interval_start);
1944 vm->loops_per_second =
1945 vm->loops_per_second * vm->damping_constant +
1946 (1.0 - vm->damping_constant) * this_loops_per_second;
1947 if (vm->loops_per_second != 0.0)
1948 vm->seconds_per_loop = 1.0 / vm->loops_per_second;
1950 vm->seconds_per_loop = 0.0;
1952 /* New interval starts now, and ends in 20ms */
1953 vm->loop_interval_start = now;
1954 vm->loop_interval_end = now + 2e-4;
1955 vm->loops_this_reporting_interval = 0;
1961 vlib_main_loop (vlib_main_t * vm)
1963 vlib_main_or_worker_loop (vm, /* is_main */ 1);
1967 vlib_worker_loop (vlib_main_t * vm)
1969 vlib_main_or_worker_loop (vm, /* is_main */ 0);
1972 vlib_main_t vlib_global_main;
1974 static clib_error_t *
1975 vlib_main_configure (vlib_main_t * vm, unformat_input_t * input)
1977 int turn_on_mem_trace = 0;
1979 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1981 if (unformat (input, "memory-trace"))
1982 turn_on_mem_trace = 1;
1984 else if (unformat (input, "elog-events %d",
1985 &vm->elog_main.event_ring_size))
1987 else if (unformat (input, "elog-post-mortem-dump"))
1988 vm->elog_post_mortem_dump = 1;
1990 return unformat_parse_error (input);
1993 unformat_free (input);
1995 /* Enable memory trace as early as possible. */
1996 if (turn_on_mem_trace)
2002 VLIB_EARLY_CONFIG_FUNCTION (vlib_main_configure, "vlib");
2005 dummy_queue_signal_callback (vlib_main_t * vm)
2009 #define foreach_weak_reference_stub \
2010 _(vlib_map_stat_segment_init) \
2012 _(vlibmemory_init) \
2013 _(map_api_segment_init)
2016 clib_error_t *name (vlib_main_t *vm) __attribute__((weak)); \
2017 clib_error_t *name (vlib_main_t *vm) { return 0; }
2018 foreach_weak_reference_stub;
2021 void vl_api_set_elog_main (elog_main_t * m) __attribute__ ((weak));
2023 vl_api_set_elog_main (elog_main_t * m)
2025 clib_warning ("STUB");
2028 int vl_api_set_elog_trace_api_messages (int enable) __attribute__ ((weak));
2030 vl_api_set_elog_trace_api_messages (int enable)
2032 clib_warning ("STUB");
2036 int vl_api_get_elog_trace_api_messages (void) __attribute__ ((weak));
2038 vl_api_get_elog_trace_api_messages (void)
2040 clib_warning ("STUB");
2044 /* Main function. */
2046 vlib_main (vlib_main_t * volatile vm, unformat_input_t * input)
2048 clib_error_t *volatile error;
2049 vlib_node_main_t *nm = &vm->node_main;
2051 vm->queue_signal_callback = dummy_queue_signal_callback;
2053 /* Turn on event log. */
2054 if (!vm->elog_main.event_ring_size)
2055 vm->elog_main.event_ring_size = 128 << 10;
2056 elog_init (&vm->elog_main, vm->elog_main.event_ring_size);
2057 elog_enable_disable (&vm->elog_main, 1);
2058 vl_api_set_elog_main (&vm->elog_main);
2059 (void) vl_api_set_elog_trace_api_messages (1);
2065 if ((error = vlib_physmem_init (vm)))
2067 clib_error_report (error);
2071 if ((error = vlib_map_stat_segment_init (vm)))
2073 clib_error_report (error);
2077 if ((error = vlib_buffer_main_init (vm)))
2079 clib_error_report (error);
2083 if ((error = vlib_thread_init (vm)))
2085 clib_error_report (error);
2089 /* Register static nodes so that init functions may use them. */
2090 vlib_register_all_static_nodes (vm);
2092 /* Set seed for random number generator.
2093 Allow user to specify seed to make random sequence deterministic. */
2094 if (!unformat (input, "seed %wd", &vm->random_seed))
2095 vm->random_seed = clib_cpu_time_now ();
2096 clib_random_buffer_init (&vm->random_buffer, vm->random_seed);
2098 /* Initialize node graph. */
2099 if ((error = vlib_node_main_init (vm)))
2101 /* Arrange for graph hook up error to not be fatal when debugging. */
2103 clib_error_report (error);
2108 /* Direct call / weak reference, for vlib standalone use-cases */
2109 if ((error = vpe_api_init (vm)))
2111 clib_error_report (error);
2115 if ((error = vlibmemory_init (vm)))
2117 clib_error_report (error);
2121 if ((error = map_api_segment_init (vm)))
2123 clib_error_report (error);
2127 /* See unix/main.c; most likely already set up */
2128 if (vm->init_functions_called == 0)
2129 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
2130 if ((error = vlib_call_all_init_functions (vm)))
2133 nm->timing_wheel = clib_mem_alloc_aligned (sizeof (TWT (tw_timer_wheel)),
2134 CLIB_CACHE_LINE_BYTES);
2136 vec_validate (nm->data_from_advancing_timing_wheel, 10);
2137 _vec_len (nm->data_from_advancing_timing_wheel) = 0;
2139 /* Create the process timing wheel */
2140 TW (tw_timer_wheel_init) ((TWT (tw_timer_wheel) *) nm->timing_wheel,
2141 0 /* no callback */ ,
2142 10e-6 /* timer period 10us */ ,
2143 ~0 /* max expirations per call */ );
2145 vec_validate (vm->pending_rpc_requests, 0);
2146 _vec_len (vm->pending_rpc_requests) = 0;
2147 vec_validate (vm->processing_rpc_requests, 0);
2148 _vec_len (vm->processing_rpc_requests) = 0;
2150 if ((error = vlib_call_all_config_functions (vm, input, 0 /* is_early */ )))
2154 * Use exponential smoothing, with a half-life of 1 second
2155 * reported_rate(t) = reported_rate(t-1) * K + rate(t)*(1-K)
2157 * Sample every 20ms, aka 50 samples per second
2158 * K = exp (-1.0/20.0);
2161 vm->damping_constant = exp (-1.0 / 20.0);
2163 /* Sort per-thread init functions before we start threads */
2164 vlib_sort_init_exit_functions (&vm->worker_init_function_registrations);
2166 /* Call all main loop enter functions. */
2168 clib_error_t *sub_error;
2169 sub_error = vlib_call_all_main_loop_enter_functions (vm);
2171 clib_error_report (sub_error);
2174 switch (clib_setjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_NONE))
2176 case VLIB_MAIN_LOOP_EXIT_NONE:
2177 vm->main_loop_exit_set = 1;
2180 case VLIB_MAIN_LOOP_EXIT_CLI:
2184 error = vm->main_loop_error;
2188 vlib_main_loop (vm);
2191 /* Call all exit functions. */
2193 clib_error_t *sub_error;
2194 sub_error = vlib_call_all_main_loop_exit_functions (vm);
2196 clib_error_report (sub_error);
2200 clib_error_report (error);
2206 vlib_pcap_dispatch_trace_configure (vlib_pcap_dispatch_trace_args_t * a)
2208 vlib_main_t *vm = vlib_get_main ();
2209 pcap_main_t *pm = &vm->dispatch_pcap_main;
2210 vlib_trace_main_t *tm;
2211 vlib_trace_node_t *tn;
2215 if (vm->dispatch_pcap_enable)
2219 (vm, "pcap dispatch capture enabled: %d of %d pkts...",
2220 pm->n_packets_captured, pm->n_packets_to_capture);
2221 vlib_cli_output (vm, "capture to file %s", pm->file_name);
2223 for (i = 0; i < vec_len (vm->dispatch_buffer_trace_nodes); i++)
2225 vlib_cli_output (vm,
2226 "Buffer trace of %d pkts from %U enabled...",
2227 a->buffer_traces_to_capture,
2228 format_vlib_node_name, vm,
2229 vm->dispatch_buffer_trace_nodes[i]);
2233 vlib_cli_output (vm, "pcap dispatch capture disabled");
2237 /* Consistency checks */
2239 /* Enable w/ capture already enabled not allowed */
2240 if (vm->dispatch_pcap_enable && a->enable)
2241 return -7; /* VNET_API_ERROR_INVALID_VALUE */
2243 /* Disable capture with capture already disabled, not interesting */
2244 if (vm->dispatch_pcap_enable == 0 && a->enable == 0)
2245 return -81; /* VNET_API_ERROR_VALUE_EXIST */
2247 /* Change number of packets to capture while capturing */
2248 if (vm->dispatch_pcap_enable && a->enable
2249 && (pm->n_packets_to_capture != a->packets_to_capture))
2250 return -8; /* VNET_API_ERROR_INVALID_VALUE_2 */
2252 /* Independent of enable/disable, to allow buffer trace multi nodes */
2253 if (a->buffer_trace_node_index != ~0)
2256 foreach_vlib_main ((
2258 tm = &this_vlib_main->trace_main;
2259 tm->verbose = 0; /* not sure this ever did anything... */
2260 vec_validate (tm->nodes, a->buffer_trace_node_index);
2261 tn = tm->nodes + a->buffer_trace_node_index;
2262 tn->limit += a->buffer_traces_to_capture;
2263 tm->trace_enable = 1;
2266 vec_add1 (vm->dispatch_buffer_trace_nodes, a->buffer_trace_node_index);
2271 /* Clean up from previous run, if any */
2272 vec_free (pm->file_name);
2273 vec_free (pm->pcap_data);
2274 memset (pm, 0, sizeof (*pm));
2276 vec_validate_aligned (vnet_trace_dummy, 2048, CLIB_CACHE_LINE_BYTES);
2278 clib_spinlock_init (&(pm->lock));
2280 if (a->filename == 0)
2281 a->filename = format (0, "/tmp/dispatch.pcap%c", 0);
2283 pm->file_name = (char *) a->filename;
2284 pm->n_packets_captured = 0;
2285 pm->packet_type = PCAP_PACKET_TYPE_vpp;
2286 pm->n_packets_to_capture = a->packets_to_capture;
2288 foreach_vlib_main (({this_vlib_main->dispatch_pcap_enable = 1;}));
2294 foreach_vlib_main (({this_vlib_main->dispatch_pcap_enable = 0;}));
2296 vec_reset_length (vm->dispatch_buffer_trace_nodes);
2297 if (pm->n_packets_captured)
2299 clib_error_t *error;
2300 pm->n_packets_to_capture = pm->n_packets_captured;
2301 vlib_cli_output (vm, "Write %d packets to %s, and stop capture...",
2302 pm->n_packets_captured, pm->file_name);
2303 error = pcap_write (pm);
2304 if (pm->flags & PCAP_MAIN_INIT_DONE)
2306 /* Report I/O errors... */
2309 clib_error_report (error);
2310 return -11; /* VNET_API_ERROR_SYSCALL_ERROR_1 */
2315 return -6; /* VNET_API_ERROR_NO_SUCH_ENTRY */
2321 static clib_error_t *
2322 dispatch_trace_command_fn (vlib_main_t * vm,
2323 unformat_input_t * input, vlib_cli_command_t * cmd)
2325 unformat_input_t _line_input, *line_input = &_line_input;
2326 vlib_pcap_dispatch_trace_args_t _a, *a = &_a;
2332 u32 node_index = ~0, buffer_traces_to_capture = 100;
2334 /* Get a line of input. */
2335 if (!unformat_user (input, unformat_line_input, line_input))
2338 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2340 if (unformat (line_input, "on %=", &enable, 1))
2342 else if (unformat (line_input, "enable %=", &enable, 1))
2344 else if (unformat (line_input, "off %=", &enable, 0))
2346 else if (unformat (line_input, "disable %=", &enable, 0))
2348 else if (unformat (line_input, "max %d", &max))
2350 else if (unformat (line_input, "packets-to-capture %d", &max))
2352 else if (unformat (line_input, "file %U", unformat_vlib_tmpfile,
2355 else if (unformat (line_input, "status %=", &status, 1))
2357 else if (unformat (line_input, "buffer-trace %U %d",
2358 unformat_vlib_node, vm, &node_index,
2359 &buffer_traces_to_capture))
2363 return clib_error_return (0, "unknown input `%U'",
2364 format_unformat_error, line_input);
2368 unformat_free (line_input);
2370 /* no need for memset (a, 0, sizeof (*a)), set all fields here. */
2371 a->filename = filename;
2374 a->packets_to_capture = max;
2375 a->buffer_trace_node_index = node_index;
2376 a->buffer_traces_to_capture = buffer_traces_to_capture;
2378 rv = vlib_pcap_dispatch_trace_configure (a);
2386 return clib_error_return (0, "dispatch trace already enabled...");
2389 return clib_error_return (0, "dispatch trace already disabled...");
2392 return clib_error_return
2393 (0, "can't change number of records to capture while tracing...");
2396 return clib_error_return (0, "I/O writing trace capture...");
2399 return clib_error_return (0, "No packets captured...");
2402 vlib_cli_output (vm, "WARNING: trace configure returned %d", rv);
2409 * This command is used to start or stop pcap dispatch trace capture, or show
2410 * the capture status.
2412 * This command has the following optional parameters:
2414 * - <b>on|off</b> - Used to start or stop capture.
2416 * - <b>max <nn></b> - Depth of local buffer. Once '<em>nn</em>' number
2417 * of packets have been received, buffer is flushed to file. Once another
2418 * '<em>nn</em>' number of packets have been received, buffer is flushed
2419 * to file, overwriting previous write. If not entered, value defaults
2420 * to 100. Can only be updated if packet capture is off.
2422 * - <b>file <name></b> - Used to specify the output filename. The file will
2423 * be placed in the '<em>/tmp</em>' directory, so only the filename is
2424 * supported. Directory should not be entered. If file already exists, file
2425 * will be overwritten. If no filename is provided, '<em>/tmp/vpe.pcap</em>'
2426 * will be used. Can only be updated if packet capture is off.
2428 * - <b>status</b> - Displays the current status and configured attributes
2429 * associated with a packet capture. If packet capture is in progress,
2430 * '<em>status</em>' also will return the number of packets currently in
2431 * the local buffer. All additional attributes entered on command line
2432 * with '<em>status</em>' will be ignored and not applied.
2435 * Example of how to display the status of capture when off:
2436 * @cliexstart{pcap dispatch trace status}
2437 * max is 100, for any interface to file /tmp/vpe.pcap
2438 * pcap dispatch capture is off...
2440 * Example of how to start a dispatch trace capture:
2441 * @cliexstart{pcap dispatch trace on max 35 file dispatchTrace.pcap}
2442 * pcap dispatch capture on...
2444 * Example of how to start a dispatch trace capture with buffer tracing
2445 * @cliexstart{pcap dispatch trace on max 10000 file dispatchTrace.pcap buffer-trace dpdk-input 1000}
2446 * pcap dispatch capture on...
2448 * Example of how to display the status of a tx packet capture in progress:
2449 * @cliexstart{pcap tx trace status}
2450 * max is 35, dispatch trace to file /tmp/vppTest.pcap
2451 * pcap tx capture is on: 20 of 35 pkts...
2453 * Example of how to stop a tx packet capture:
2454 * @cliexstart{vppctl pcap dispatch trace off}
2455 * captured 21 pkts...
2456 * saved to /tmp/dispatchTrace.pcap...
2460 VLIB_CLI_COMMAND (pcap_dispatch_trace_command, static) = {
2461 .path = "pcap dispatch trace",
2463 "pcap dispatch trace [on|off] [max <nn>] [file <name>] [status]\n"
2464 " [buffer-trace <input-node-name> <nn>]",
2465 .function = dispatch_trace_command_fn,
2470 * fd.io coding-style-patch-verification: ON
2473 * eval: (c-set-style "gnu")