2 * Copyright (c) 2017 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 * buffer.c: allocate/free network buffers.
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.
43 * Allocate/free network buffers.
46 #include <rte_config.h>
48 #include <rte_common.h>
50 #include <rte_memory.h>
51 #include <rte_memzone.h>
52 #include <rte_tailq.h>
54 #include <rte_per_lcore.h>
55 #include <rte_launch.h>
56 #include <rte_atomic.h>
57 #include <rte_cycles.h>
58 #include <rte_prefetch.h>
59 #include <rte_lcore.h>
60 #include <rte_per_lcore.h>
61 #include <rte_branch_prediction.h>
62 #include <rte_interrupts.h>
64 #include <rte_random.h>
65 #include <rte_debug.h>
66 #include <rte_ether.h>
67 #include <rte_ethdev.h>
69 #include <rte_mempool.h>
71 #include <rte_version.h>
73 #include <vlib/vlib.h>
74 #include <vnet/vnet.h>
75 #include <dpdk/device/dpdk.h>
76 #include <dpdk/device/dpdk_priv.h>
79 STATIC_ASSERT (VLIB_BUFFER_PRE_DATA_SIZE == RTE_PKTMBUF_HEADROOM,
80 "VLIB_BUFFER_PRE_DATA_SIZE must be equal to RTE_PKTMBUF_HEADROOM");
82 static struct rte_mbuf ***mbuf_pending_free_list = 0;
84 static_always_inline void
85 dpdk_rte_pktmbuf_free (vlib_main_t * vm, vlib_buffer_t * b)
87 vlib_buffer_t *hb = b;
90 mb = rte_mbuf_from_vlib_buffer (hb);
91 static struct rte_mempool *last_pool = 0;
92 static u8 last_buffer_pool_index;
96 next = b->next_buffer;
97 mb = rte_mbuf_from_vlib_buffer (b);
99 if (PREDICT_FALSE (b->n_add_refs))
101 rte_mbuf_refcnt_update (mb, b->n_add_refs);
105 mb = rte_pktmbuf_prefree_seg (mb);
108 if (mb->pool != last_pool)
110 last_pool = mb->pool;
111 dpdk_mempool_private_t *privp = rte_mempool_get_priv (last_pool);
112 last_buffer_pool_index = privp->buffer_pool_index;
113 vec_validate_aligned (mbuf_pending_free_list,
114 last_buffer_pool_index,
115 CLIB_CACHE_LINE_BYTES);
117 vec_add1 (mbuf_pending_free_list[last_buffer_pool_index], mb);
120 if (flags & VLIB_BUFFER_NEXT_PRESENT)
122 b = vlib_get_buffer (vm, next);
127 #ifndef CLIB_MULTIARCH_VARIANT
129 del_free_list (vlib_main_t * vm, vlib_buffer_free_list_t * f)
134 for (i = 0; i < vec_len (f->buffers); i++)
136 b = vlib_get_buffer (vm, f->buffers[i]);
137 dpdk_rte_pktmbuf_free (vm, b);
141 vec_free (f->buffers);
144 /* Add buffer free list. */
146 dpdk_buffer_delete_free_list (vlib_main_t * vm, u32 free_list_index)
148 vlib_buffer_main_t *bm = vm->buffer_main;
149 vlib_buffer_free_list_t *f;
153 ASSERT (vlib_get_thread_index () == 0);
155 f = vlib_buffer_get_free_list (vm, free_list_index);
157 merge_index = vlib_buffer_get_free_list_with_size (vm, f->n_data_bytes);
158 if (merge_index != ~0 && merge_index != free_list_index)
160 vlib_buffer_merge_free_lists (pool_elt_at_index
161 (bm->buffer_free_list_pool, merge_index),
165 del_free_list (vm, f);
168 memset (f, 0xab, sizeof (f[0]));
170 pool_put (bm->buffer_free_list_pool, f);
172 for (i = 1; i < vec_len (vlib_mains); i++)
174 bm = vlib_mains[i]->buffer_main;
175 f = vlib_buffer_get_free_list (vlib_mains[i], free_list_index);;
176 memset (f, 0xab, sizeof (f[0]));
177 pool_put (bm->buffer_free_list_pool, f);
182 /* Make sure free list has at least given number of free buffers. */
184 fill_free_list (vlib_main_t * vm,
185 vlib_buffer_free_list_t * fl, uword min_free_buffers)
187 dpdk_main_t *dm = &dpdk_main;
188 vlib_buffer_t *b0, *b1, *b2, *b3;
190 u32 bi0, bi1, bi2, bi3;
191 unsigned socket_id = rte_socket_id ();
192 struct rte_mempool *rmp = dm->pktmbuf_pools[socket_id];
193 dpdk_mempool_private_t *privp = rte_mempool_get_priv (rmp);
194 struct rte_mbuf *mb0, *mb1, *mb2, *mb3;
198 if (PREDICT_FALSE (rmp == 0))
201 /* Already have enough free buffers on free list? */
202 n = min_free_buffers - vec_len (fl->buffers);
204 return min_free_buffers;
206 /* Always allocate round number of buffers. */
207 n = round_pow2 (n, CLIB_CACHE_LINE_BYTES / sizeof (u32));
209 /* Always allocate new buffers in reasonably large sized chunks. */
210 n = clib_max (n, fl->min_n_buffers_each_physmem_alloc);
212 vec_validate_aligned (vm->mbuf_alloc_list, n - 1, CLIB_CACHE_LINE_BYTES);
214 if (rte_mempool_get_bulk (rmp, vm->mbuf_alloc_list, n) < 0)
217 memset (&bt, 0, sizeof (vlib_buffer_t));
218 vlib_buffer_init_for_free_list (&bt, fl);
219 bt.buffer_pool_index = privp->buffer_pool_index;
221 _vec_len (vm->mbuf_alloc_list) = n;
224 int f = vec_len (fl->buffers);
225 vec_resize_aligned (fl->buffers, n, CLIB_CACHE_LINE_BYTES);
229 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
230 (vm->mbuf_alloc_list[i + 4]), STORE);
231 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
232 (vm->mbuf_alloc_list[i + 5]), STORE);
233 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
234 (vm->mbuf_alloc_list[i + 6]), STORE);
235 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
236 (vm->mbuf_alloc_list[i + 7]), STORE);
238 mb0 = vm->mbuf_alloc_list[i];
239 mb1 = vm->mbuf_alloc_list[i + 1];
240 mb2 = vm->mbuf_alloc_list[i + 2];
241 mb3 = vm->mbuf_alloc_list[i + 3];
243 b0 = vlib_buffer_from_rte_mbuf (mb0);
244 b1 = vlib_buffer_from_rte_mbuf (mb1);
245 b2 = vlib_buffer_from_rte_mbuf (mb2);
246 b3 = vlib_buffer_from_rte_mbuf (mb3);
248 bi0 = vlib_get_buffer_index (vm, b0);
249 bi1 = vlib_get_buffer_index (vm, b1);
250 bi2 = vlib_get_buffer_index (vm, b2);
251 bi3 = vlib_get_buffer_index (vm, b3);
253 fl->buffers[f++] = bi0;
254 fl->buffers[f++] = bi1;
255 fl->buffers[f++] = bi2;
256 fl->buffers[f++] = bi3;
258 clib_memcpy64_x4 (b0, b1, b2, b3, &bt);
260 if (fl->buffer_init_function)
262 fl->buffer_init_function (vm, fl, &bi0, 1);
263 fl->buffer_init_function (vm, fl, &bi1, 1);
264 fl->buffer_init_function (vm, fl, &bi2, 1);
265 fl->buffer_init_function (vm, fl, &bi3, 1);
272 mb0 = vm->mbuf_alloc_list[i];
274 b0 = vlib_buffer_from_rte_mbuf (mb0);
275 bi0 = vlib_get_buffer_index (vm, b0);
277 fl->buffers[f++] = bi0;
278 clib_memcpy (b0, &bt, sizeof (vlib_buffer_t));
280 if (fl->buffer_init_function)
281 fl->buffer_init_function (vm, fl, &bi0, 1);
291 alloc_from_free_list (vlib_main_t * vm,
292 vlib_buffer_free_list_t * free_list,
293 u32 * alloc_buffers, u32 n_alloc_buffers)
300 n_filled = fill_free_list (vm, free_list, n_alloc_buffers);
304 len = vec_len (free_list->buffers);
305 ASSERT (len >= n_alloc_buffers);
307 src = free_list->buffers + len - n_alloc_buffers;
308 clib_memcpy (dst, src, n_alloc_buffers * sizeof (u32));
310 _vec_len (free_list->buffers) -= n_alloc_buffers;
312 return n_alloc_buffers;
315 /* Allocate a given number of buffers into given array.
316 Returns number actually allocated which will be either zero or
319 CLIB_MULTIARCH_FN (dpdk_buffer_alloc) (vlib_main_t * vm, u32 * buffers,
322 vlib_buffer_main_t *bm = vm->buffer_main;
324 return alloc_from_free_list
326 pool_elt_at_index (bm->buffer_free_list_pool,
327 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX),
333 CLIB_MULTIARCH_FN (dpdk_buffer_alloc_from_free_list) (vlib_main_t * vm,
338 vlib_buffer_main_t *bm = vm->buffer_main;
339 vlib_buffer_free_list_t *f;
340 f = pool_elt_at_index (bm->buffer_free_list_pool, free_list_index);
341 return alloc_from_free_list (vm, f, buffers, n_buffers);
344 static_always_inline void
345 dpdk_prefetch_buffer_by_index (vlib_main_t * vm, u32 bi)
349 b = vlib_get_buffer (vm, bi);
350 mb = rte_mbuf_from_vlib_buffer (b);
351 CLIB_PREFETCH (mb, CLIB_CACHE_LINE_BYTES, STORE);
352 CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
355 static_always_inline void
356 recycle_or_free (vlib_main_t * vm, vlib_buffer_main_t * bm, u32 bi,
359 vlib_buffer_free_list_t *fl;
361 fl = vlib_buffer_get_buffer_free_list (vm, b, &fi);
363 /* The only current use of this callback: multicast recycle */
364 if (PREDICT_FALSE (fl->buffers_added_to_freelist_function != 0))
368 vlib_buffer_add_to_free_list (vm, fl, bi,
369 (b->flags & VLIB_BUFFER_RECYCLE) == 0);
371 for (j = 0; j < vec_len (bm->announce_list); j++)
373 if (fl == bm->announce_list[j])
374 goto already_announced;
376 vec_add1 (bm->announce_list, fl);
382 if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_RECYCLE) == 0))
383 dpdk_rte_pktmbuf_free (vm, b);
387 static_always_inline void
388 vlib_buffer_free_inline (vlib_main_t * vm,
389 u32 * buffers, u32 n_buffers, u32 follow_buffer_next)
391 vlib_buffer_main_t *bm = vm->buffer_main;
392 vlib_buffer_t *b0, *b1, *b2, *b3;
394 u32 (*cb) (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
395 u32 follow_buffer_next);
397 cb = bm->buffer_free_callback;
399 if (PREDICT_FALSE (cb != 0))
400 n_buffers = (*cb) (vm, buffers, n_buffers, follow_buffer_next);
405 while (i + 7 < n_buffers)
407 dpdk_prefetch_buffer_by_index (vm, buffers[i + 4]);
408 dpdk_prefetch_buffer_by_index (vm, buffers[i + 5]);
409 dpdk_prefetch_buffer_by_index (vm, buffers[i + 6]);
410 dpdk_prefetch_buffer_by_index (vm, buffers[i + 7]);
412 b0 = vlib_get_buffer (vm, buffers[i]);
413 b1 = vlib_get_buffer (vm, buffers[i + 1]);
414 b2 = vlib_get_buffer (vm, buffers[i + 2]);
415 b3 = vlib_get_buffer (vm, buffers[i + 3]);
417 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
418 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
419 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b2);
420 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b3);
422 recycle_or_free (vm, bm, buffers[i], b0);
423 recycle_or_free (vm, bm, buffers[i + 1], b1);
424 recycle_or_free (vm, bm, buffers[i + 2], b2);
425 recycle_or_free (vm, bm, buffers[i + 3], b3);
429 while (i < n_buffers)
431 b0 = vlib_get_buffer (vm, buffers[i]);
432 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b);
433 recycle_or_free (vm, bm, buffers[i], b0);
436 if (vec_len (bm->announce_list))
438 vlib_buffer_free_list_t *fl;
439 for (i = 0; i < vec_len (bm->announce_list); i++)
441 fl = bm->announce_list[i];
442 fl->buffers_added_to_freelist_function (vm, fl);
444 _vec_len (bm->announce_list) = 0;
447 vec_foreach_index (i, mbuf_pending_free_list)
449 int len = vec_len (mbuf_pending_free_list[i]);
452 rte_mempool_put_bulk (mbuf_pending_free_list[i][len - 1]->pool,
453 (void *) mbuf_pending_free_list[i], len);
454 vec_reset_length (mbuf_pending_free_list[i]);
460 CLIB_MULTIARCH_FN (dpdk_buffer_free) (vlib_main_t * vm, u32 * buffers,
463 vlib_buffer_free_inline (vm, buffers, n_buffers, /* follow_buffer_next */
468 CLIB_MULTIARCH_FN (dpdk_buffer_free_no_next) (vlib_main_t * vm, u32 * buffers,
471 vlib_buffer_free_inline (vm, buffers, n_buffers, /* follow_buffer_next */
475 #ifndef CLIB_MULTIARCH_VARIANT
477 dpdk_packet_template_init (vlib_main_t * vm,
480 uword n_packet_data_bytes,
481 uword min_n_buffers_each_physmem_alloc, u8 * name)
483 vlib_packet_template_t *t = (vlib_packet_template_t *) vt;
485 vlib_worker_thread_barrier_sync (vm);
486 memset (t, 0, sizeof (t[0]));
488 vec_add (t->packet_data, packet_data, n_packet_data_bytes);
490 vlib_worker_thread_barrier_release (vm);
494 dpdk_buffer_pool_create (vlib_main_t * vm, unsigned num_mbufs,
497 dpdk_main_t *dm = &dpdk_main;
498 struct rte_mempool *rmp;
499 dpdk_mempool_private_t priv;
500 vlib_physmem_region_t *pr;
501 vlib_physmem_region_index_t pri;
507 vec_validate_aligned (dm->pktmbuf_pools, socket_id, CLIB_CACHE_LINE_BYTES);
509 /* pool already exists, nothing to do */
510 if (dm->pktmbuf_pools[socket_id])
513 pool_name = format (0, "dpdk_mbuf_pool_socket%u%c", socket_id, 0);
515 elt_size = sizeof (struct rte_mbuf) +
516 VLIB_BUFFER_HDR_SIZE /* priv size */ +
517 VLIB_BUFFER_PRE_DATA_SIZE + VLIB_BUFFER_DATA_SIZE; /*data room size */
519 obj_size = rte_mempool_calc_obj_size (elt_size, 0, 0);
520 size = rte_mempool_xmem_size (num_mbufs, obj_size, 21);
522 clib_error_t *error = 0;
523 error = vlib_physmem_region_alloc (vm, (char *) pool_name, size, socket_id,
526 clib_error_report (error);
528 pr = vlib_physmem_get_region (vm, pri);
530 priv.mbp_priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
531 VLIB_BUFFER_DATA_SIZE;
532 priv.mbp_priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
535 /* Check that pg_shift parameter is valid. */
536 if (pg_shift > MEMPOOL_PG_SHIFT_MAX)
542 rmp = rte_mempool_create_empty ((char *) pool_name, /* pool name */
543 num_mbufs, /* number of mbufs */
544 elt_size, 512, /* cache size */
545 sizeof (dpdk_mempool_private_t), /* private data size */
546 socket_id, 0); /* flags */
549 rte_mempool_set_ops_byname (rmp, RTE_MBUF_DEFAULT_MEMPOOL_OPS, NULL);
551 /* call the mempool priv initializer */
552 rte_pktmbuf_pool_init (rmp, &priv);
554 ret = rte_mempool_populate_phys_tab (rmp, pr->mem, pr->page_table,
555 pr->n_pages, pr->log2_page_size,
557 if (ret == (i32) rmp->size)
559 /* call the object initializers */
560 rte_mempool_obj_iter (rmp, rte_pktmbuf_init, 0);
562 dpdk_mempool_private_t *privp = rte_mempool_get_priv (rmp);
563 privp->buffer_pool_index = vlib_buffer_add_physmem_region (vm, pri);
565 dm->pktmbuf_pools[socket_id] = rmp;
570 rte_mempool_free (rmp);
573 vec_free (pool_name);
575 /* no usable pool for this socket, try to use pool from another one */
576 for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
578 if (dm->pktmbuf_pools[i])
580 clib_warning ("WARNING: Failed to allocate mempool for CPU socket "
581 "%u. Threads running on socket %u will use socket %u "
582 "mempool.", socket_id, socket_id, i);
583 dm->pktmbuf_pools[socket_id] = dm->pktmbuf_pools[i];
588 return clib_error_return (0, "failed to allocate mempool on socket %u",
594 u32 *vlib_buffer_state_validation_lock;
595 uword *vlib_buffer_state_validation_hash;
596 void *vlib_buffer_state_heap;
598 static clib_error_t *
599 buffer_state_validation_init (vlib_main_t * vm)
603 vlib_buffer_state_heap = mheap_alloc (0, 10 << 20);
605 oldheap = clib_mem_set_heap (vlib_buffer_state_heap);
607 vlib_buffer_state_validation_hash = hash_create (0, sizeof (uword));
608 vec_validate_aligned (vlib_buffer_state_validation_lock, 0,
609 CLIB_CACHE_LINE_BYTES);
610 clib_mem_set_heap (oldheap);
614 VLIB_INIT_FUNCTION (buffer_state_validation_init);
618 struct dpdk_validate_buf_result
624 #define DPDK_TRAJECTORY_POISON 31
627 dpdk_buffer_validate_trajectory (struct rte_mempool *mp, void *opaque,
628 void *obj, unsigned obj_idx)
631 struct dpdk_validate_buf_result *counter = opaque;
632 b = vlib_buffer_from_rte_mbuf ((struct rte_mbuf *) obj);
633 if (b->pre_data[0] != 0)
635 if (b->pre_data[0] == DPDK_TRAJECTORY_POISON)
636 counter->uninitialized++;
643 dpdk_buffer_validate_trajectory_all (u32 * uninitialized)
645 dpdk_main_t *dm = &dpdk_main;
646 struct dpdk_validate_buf_result counter = { 0 };
649 for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
650 rte_mempool_obj_iter (dm->pktmbuf_pools[i],
651 dpdk_buffer_validate_trajectory, &counter);
653 *uninitialized = counter.uninitialized;
654 return counter.invalid;
658 dpdk_buffer_poison_trajectory (struct rte_mempool *mp, void *opaque,
659 void *obj, unsigned obj_idx)
662 b = vlib_buffer_from_rte_mbuf ((struct rte_mbuf *) obj);
663 b->pre_data[0] = DPDK_TRAJECTORY_POISON;
667 dpdk_buffer_poison_trajectory_all (void)
669 dpdk_main_t *dm = &dpdk_main;
672 for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
673 rte_mempool_obj_iter (dm->pktmbuf_pools[i], dpdk_buffer_poison_trajectory,
679 VLIB_BUFFER_REGISTER_CALLBACKS (dpdk, static) = {
680 .vlib_buffer_alloc_cb = &dpdk_buffer_alloc,
681 .vlib_buffer_alloc_from_free_list_cb = &dpdk_buffer_alloc_from_free_list,
682 .vlib_buffer_free_cb = &dpdk_buffer_free,
683 .vlib_buffer_free_no_next_cb = &dpdk_buffer_free_no_next,
684 .vlib_packet_template_init_cb = &dpdk_packet_template_init,
685 .vlib_buffer_delete_free_list_cb = &dpdk_buffer_delete_free_list,
690 vlib_buffer_alloc_cb_t __clib_weak dpdk_buffer_alloc_avx512;
691 vlib_buffer_alloc_cb_t __clib_weak dpdk_buffer_alloc_avx2;
692 vlib_buffer_alloc_from_free_list_cb_t __clib_weak
693 dpdk_buffer_alloc_from_free_list_avx512;
694 vlib_buffer_alloc_from_free_list_cb_t __clib_weak
695 dpdk_buffer_alloc_from_free_list_avx2;
696 vlib_buffer_free_cb_t __clib_weak dpdk_buffer_free_avx512;
697 vlib_buffer_free_cb_t __clib_weak dpdk_buffer_free_avx2;
698 vlib_buffer_free_no_next_cb_t __clib_weak dpdk_buffer_free_no_next_avx512;
699 vlib_buffer_free_no_next_cb_t __clib_weak dpdk_buffer_free_no_next_avx2;
701 static void __clib_constructor
702 dpdk_input_multiarch_select (void)
704 vlib_buffer_callbacks_t *cb = &__dpdk_buffer_callbacks;
705 if (dpdk_buffer_alloc_avx512 && clib_cpu_supports_avx512f ())
707 cb->vlib_buffer_alloc_cb = dpdk_buffer_alloc_avx512;
708 cb->vlib_buffer_alloc_from_free_list_cb =
709 dpdk_buffer_alloc_from_free_list_avx512;
710 cb->vlib_buffer_free_cb = dpdk_buffer_free_avx512;
711 cb->vlib_buffer_free_no_next_cb = dpdk_buffer_free_no_next_avx512;
713 else if (dpdk_buffer_alloc_avx2 && clib_cpu_supports_avx2 ())
715 cb->vlib_buffer_alloc_cb = dpdk_buffer_alloc_avx2;
716 cb->vlib_buffer_alloc_from_free_list_cb =
717 dpdk_buffer_alloc_from_free_list_avx2;
718 cb->vlib_buffer_free_cb = dpdk_buffer_free_avx2;
719 cb->vlib_buffer_free_no_next_cb = dpdk_buffer_free_no_next_avx2;
727 * fd.io coding-style-patch-verification: ON
730 * eval: (c-set-style "gnu")