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");
84 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
85 struct rte_mbuf ***mbuf_pending_free_list;
87 /* cached last pool */
88 struct rte_mempool *last_pool;
89 u8 last_buffer_pool_index;
90 } dpdk_buffer_per_thread_data;
94 dpdk_buffer_per_thread_data *ptd;
97 dpdk_buffer_main_t dpdk_buffer_main;
99 static_always_inline void
100 dpdk_rte_pktmbuf_free (vlib_main_t * vm, u32 thread_index, vlib_buffer_t * b)
102 vlib_buffer_t *hb = b;
103 dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
104 dpdk_buffer_per_thread_data *d = vec_elt_at_index (dbm->ptd, thread_index);
107 mb = rte_mbuf_from_vlib_buffer (hb);
111 next = b->next_buffer;
112 mb = rte_mbuf_from_vlib_buffer (b);
114 if (PREDICT_FALSE (b->n_add_refs))
116 rte_mbuf_refcnt_update (mb, b->n_add_refs);
120 mb = rte_pktmbuf_prefree_seg (mb);
123 if (mb->pool != d->last_pool)
125 d->last_pool = mb->pool;
126 dpdk_mempool_private_t *privp = rte_mempool_get_priv (d->last_pool);
127 d->last_buffer_pool_index = privp->buffer_pool_index;
128 vec_validate_aligned (d->mbuf_pending_free_list,
129 d->last_buffer_pool_index,
130 CLIB_CACHE_LINE_BYTES);
132 vec_add1 (d->mbuf_pending_free_list[d->last_buffer_pool_index], mb);
135 if (flags & VLIB_BUFFER_NEXT_PRESENT)
137 b = vlib_get_buffer (vm, next);
142 #ifndef CLIB_MULTIARCH_VARIANT
144 del_free_list (vlib_main_t * vm, vlib_buffer_free_list_t * f)
148 u32 thread_index = vlib_get_thread_index ();
150 for (i = 0; i < vec_len (f->buffers); i++)
152 b = vlib_get_buffer (vm, f->buffers[i]);
153 dpdk_rte_pktmbuf_free (vm, thread_index, b);
157 vec_free (f->buffers);
160 /* Add buffer free list. */
162 dpdk_buffer_delete_free_list (vlib_main_t * vm,
163 vlib_buffer_free_list_index_t free_list_index)
165 vlib_buffer_main_t *bm = vm->buffer_main;
166 vlib_buffer_free_list_t *f;
167 vlib_buffer_free_list_index_t merge_index;
170 ASSERT (vlib_get_thread_index () == 0);
172 f = vlib_buffer_get_free_list (vm, free_list_index);
174 merge_index = vlib_buffer_get_free_list_with_size (vm, f->n_data_bytes);
175 if (merge_index != (vlib_buffer_free_list_index_t) ~ 0 &&
176 merge_index != free_list_index)
178 vlib_buffer_merge_free_lists (pool_elt_at_index
179 (bm->buffer_free_list_pool, merge_index),
183 del_free_list (vm, f);
186 memset (f, 0xab, sizeof (f[0]));
188 pool_put (bm->buffer_free_list_pool, f);
190 for (i = 1; i < vec_len (vlib_mains); i++)
192 bm = vlib_mains[i]->buffer_main;
193 f = vlib_buffer_get_free_list (vlib_mains[i], free_list_index);;
194 memset (f, 0xab, sizeof (f[0]));
195 pool_put (bm->buffer_free_list_pool, f);
200 /* Make sure free list has at least given number of free buffers. */
202 CLIB_MULTIARCH_FN (dpdk_buffer_fill_free_list) (vlib_main_t * vm,
203 vlib_buffer_free_list_t * fl,
204 uword min_free_buffers)
206 dpdk_main_t *dm = &dpdk_main;
207 vlib_buffer_t *b0, *b1, *b2, *b3;
209 u32 bi0, bi1, bi2, bi3;
210 unsigned socket_id = rte_socket_id ();
211 struct rte_mempool *rmp = dm->pktmbuf_pools[socket_id];
212 dpdk_mempool_private_t *privp = rte_mempool_get_priv (rmp);
213 struct rte_mbuf *mb0, *mb1, *mb2, *mb3;
217 if (PREDICT_FALSE (rmp == 0))
220 /* Already have enough free buffers on free list? */
221 n = min_free_buffers - vec_len (fl->buffers);
223 return min_free_buffers;
225 /* Always allocate round number of buffers. */
226 n = round_pow2 (n, CLIB_CACHE_LINE_BYTES / sizeof (u32));
228 /* Always allocate new buffers in reasonably large sized chunks. */
229 n = clib_max (n, fl->min_n_buffers_each_physmem_alloc);
231 vec_validate_aligned (vm->mbuf_alloc_list, n - 1, CLIB_CACHE_LINE_BYTES);
233 if (rte_mempool_get_bulk (rmp, vm->mbuf_alloc_list, n) < 0)
236 memset (&bt, 0, sizeof (vlib_buffer_t));
237 vlib_buffer_init_for_free_list (&bt, fl);
238 bt.buffer_pool_index = privp->buffer_pool_index;
240 _vec_len (vm->mbuf_alloc_list) = n;
243 int f = vec_len (fl->buffers);
244 vec_resize_aligned (fl->buffers, n, CLIB_CACHE_LINE_BYTES);
248 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
249 (vm->mbuf_alloc_list[i + 4]), STORE);
250 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
251 (vm->mbuf_alloc_list[i + 5]), STORE);
252 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
253 (vm->mbuf_alloc_list[i + 6]), STORE);
254 vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf
255 (vm->mbuf_alloc_list[i + 7]), STORE);
257 mb0 = vm->mbuf_alloc_list[i];
258 mb1 = vm->mbuf_alloc_list[i + 1];
259 mb2 = vm->mbuf_alloc_list[i + 2];
260 mb3 = vm->mbuf_alloc_list[i + 3];
262 b0 = vlib_buffer_from_rte_mbuf (mb0);
263 b1 = vlib_buffer_from_rte_mbuf (mb1);
264 b2 = vlib_buffer_from_rte_mbuf (mb2);
265 b3 = vlib_buffer_from_rte_mbuf (mb3);
267 bi0 = vlib_get_buffer_index (vm, b0);
268 bi1 = vlib_get_buffer_index (vm, b1);
269 bi2 = vlib_get_buffer_index (vm, b2);
270 bi3 = vlib_get_buffer_index (vm, b3);
272 fl->buffers[f++] = bi0;
273 fl->buffers[f++] = bi1;
274 fl->buffers[f++] = bi2;
275 fl->buffers[f++] = bi3;
277 clib_memcpy64_x4 (b0, b1, b2, b3, &bt);
279 if (fl->buffer_init_function)
281 fl->buffer_init_function (vm, fl, &bi0, 1);
282 fl->buffer_init_function (vm, fl, &bi1, 1);
283 fl->buffer_init_function (vm, fl, &bi2, 1);
284 fl->buffer_init_function (vm, fl, &bi3, 1);
291 mb0 = vm->mbuf_alloc_list[i];
293 b0 = vlib_buffer_from_rte_mbuf (mb0);
294 bi0 = vlib_get_buffer_index (vm, b0);
296 fl->buffers[f++] = bi0;
297 clib_memcpy (b0, &bt, sizeof (vlib_buffer_t));
299 if (fl->buffer_init_function)
300 fl->buffer_init_function (vm, fl, &bi0, 1);
309 static_always_inline void
310 dpdk_prefetch_buffer_by_index (vlib_main_t * vm, u32 bi)
314 b = vlib_get_buffer (vm, bi);
315 mb = rte_mbuf_from_vlib_buffer (b);
316 CLIB_PREFETCH (mb, 2 * CLIB_CACHE_LINE_BYTES, STORE);
317 CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
320 static_always_inline void
321 recycle_or_free (vlib_main_t * vm, vlib_buffer_main_t * bm, u32 bi,
324 vlib_buffer_free_list_t *fl;
325 u32 thread_index = vlib_get_thread_index ();
326 vlib_buffer_free_list_index_t fi;
327 fl = vlib_buffer_get_buffer_free_list (vm, b, &fi);
329 /* The only current use of this callback: multicast recycle */
330 if (PREDICT_FALSE (fl->buffers_added_to_freelist_function != 0))
334 vlib_buffer_add_to_free_list (vm, fl, bi,
335 (b->flags & VLIB_BUFFER_RECYCLE) == 0);
337 for (j = 0; j < vec_len (bm->announce_list); j++)
339 if (fl == bm->announce_list[j])
340 goto already_announced;
342 vec_add1 (bm->announce_list, fl);
348 if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_RECYCLE) == 0))
349 dpdk_rte_pktmbuf_free (vm, thread_index, b);
353 static_always_inline void
354 vlib_buffer_free_inline (vlib_main_t * vm,
355 u32 * buffers, u32 n_buffers, u32 follow_buffer_next)
357 vlib_buffer_main_t *bm = vm->buffer_main;
358 dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
359 vlib_buffer_t *b0, *b1, *b2, *b3;
360 u32 thread_index = vlib_get_thread_index ();
361 dpdk_buffer_per_thread_data *d = vec_elt_at_index (dbm->ptd, thread_index);
363 u32 (*cb) (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
364 u32 follow_buffer_next);
366 cb = bm->buffer_free_callback;
368 if (PREDICT_FALSE (cb != 0))
369 n_buffers = (*cb) (vm, buffers, n_buffers, follow_buffer_next);
374 while (i + 7 < n_buffers)
376 dpdk_prefetch_buffer_by_index (vm, buffers[i + 4]);
377 dpdk_prefetch_buffer_by_index (vm, buffers[i + 5]);
378 dpdk_prefetch_buffer_by_index (vm, buffers[i + 6]);
379 dpdk_prefetch_buffer_by_index (vm, buffers[i + 7]);
381 b0 = vlib_get_buffer (vm, buffers[i]);
382 b1 = vlib_get_buffer (vm, buffers[i + 1]);
383 b2 = vlib_get_buffer (vm, buffers[i + 2]);
384 b3 = vlib_get_buffer (vm, buffers[i + 3]);
386 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
387 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
388 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b2);
389 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b3);
391 recycle_or_free (vm, bm, buffers[i], b0);
392 recycle_or_free (vm, bm, buffers[i + 1], b1);
393 recycle_or_free (vm, bm, buffers[i + 2], b2);
394 recycle_or_free (vm, bm, buffers[i + 3], b3);
398 while (i < n_buffers)
400 b0 = vlib_get_buffer (vm, buffers[i]);
401 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
402 recycle_or_free (vm, bm, buffers[i], b0);
405 if (vec_len (bm->announce_list))
407 vlib_buffer_free_list_t *fl;
408 for (i = 0; i < vec_len (bm->announce_list); i++)
410 fl = bm->announce_list[i];
411 fl->buffers_added_to_freelist_function (vm, fl);
413 _vec_len (bm->announce_list) = 0;
416 vec_foreach_index (i, d->mbuf_pending_free_list)
418 int len = vec_len (d->mbuf_pending_free_list[i]);
421 rte_mempool_put_bulk (d->mbuf_pending_free_list[i][len - 1]->pool,
422 (void *) d->mbuf_pending_free_list[i], len);
423 vec_reset_length (d->mbuf_pending_free_list[i]);
429 CLIB_MULTIARCH_FN (dpdk_buffer_free) (vlib_main_t * vm, u32 * buffers,
432 vlib_buffer_free_inline (vm, buffers, n_buffers, /* follow_buffer_next */
437 CLIB_MULTIARCH_FN (dpdk_buffer_free_no_next) (vlib_main_t * vm, u32 * buffers,
440 vlib_buffer_free_inline (vm, buffers, n_buffers, /* follow_buffer_next */
444 #ifndef CLIB_MULTIARCH_VARIANT
446 dpdk_packet_template_init (vlib_main_t * vm,
449 uword n_packet_data_bytes,
450 uword min_n_buffers_each_physmem_alloc, u8 * name)
452 vlib_packet_template_t *t = (vlib_packet_template_t *) vt;
454 vlib_worker_thread_barrier_sync (vm);
455 memset (t, 0, sizeof (t[0]));
457 vec_add (t->packet_data, packet_data, n_packet_data_bytes);
459 vlib_worker_thread_barrier_release (vm);
463 dpdk_pool_create (vlib_main_t * vm, u8 * pool_name, u32 elt_size,
464 u32 num_elts, u32 pool_priv_size, u16 cache_size, u8 numa,
465 struct rte_mempool **_mp, vlib_physmem_region_index_t * pri)
467 struct rte_mempool *mp;
468 vlib_physmem_region_t *pr;
469 clib_error_t *error = 0;
473 obj_size = rte_mempool_calc_obj_size (elt_size, 0, 0);
474 #if RTE_VERSION < RTE_VERSION_NUM(17, 11, 0, 0)
475 size = rte_mempool_xmem_size (num_elts, obj_size, 21);
477 size = rte_mempool_xmem_size (num_elts, obj_size, 21, 0);
481 vlib_physmem_region_alloc (vm, (i8 *) pool_name, size, numa, 0, pri);
485 pr = vlib_physmem_get_region (vm, pri[0]);
488 rte_mempool_create_empty ((i8 *) pool_name, num_elts, elt_size,
489 512, pool_priv_size, numa, 0);
491 return clib_error_return (0, "failed to create %s", pool_name);
493 rte_mempool_set_ops_byname (mp, RTE_MBUF_DEFAULT_MEMPOOL_OPS, NULL);
495 #if RTE_VERSION < RTE_VERSION_NUM(17, 11, 0, 0)
497 rte_mempool_populate_phys_tab (mp, pr->mem, pr->page_table, pr->n_pages,
498 pr->log2_page_size, NULL, NULL);
501 rte_mempool_populate_iova_tab (mp, pr->mem, pr->page_table, pr->n_pages,
502 pr->log2_page_size, NULL, NULL);
504 if (ret != (i32) mp->size)
506 rte_mempool_free (mp);
507 return clib_error_return (0, "failed to populate %s", pool_name);
516 dpdk_buffer_pool_create (vlib_main_t * vm, unsigned num_mbufs,
519 dpdk_main_t *dm = &dpdk_main;
520 struct rte_mempool *rmp;
521 dpdk_mempool_private_t priv;
522 vlib_physmem_region_index_t pri;
523 clib_error_t *error = 0;
527 vec_validate_aligned (dm->pktmbuf_pools, socket_id, CLIB_CACHE_LINE_BYTES);
529 /* pool already exists, nothing to do */
530 if (dm->pktmbuf_pools[socket_id])
533 pool_name = format (0, "dpdk_mbuf_pool_socket%u%c", socket_id, 0);
535 elt_size = sizeof (struct rte_mbuf) +
536 VLIB_BUFFER_HDR_SIZE /* priv size */ +
537 VLIB_BUFFER_PRE_DATA_SIZE + VLIB_BUFFER_DATA_SIZE; /*data room size */
540 dpdk_pool_create (vm, pool_name, elt_size, num_mbufs,
541 sizeof (dpdk_mempool_private_t), 512, socket_id,
544 vec_free (pool_name);
548 priv.mbp_priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
549 VLIB_BUFFER_DATA_SIZE;
550 priv.mbp_priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
552 /* call the mempool priv initializer */
553 rte_pktmbuf_pool_init (rmp, &priv);
555 /* call the object initializers */
556 rte_mempool_obj_iter (rmp, rte_pktmbuf_init, 0);
558 dpdk_mempool_private_t *privp = rte_mempool_get_priv (rmp);
559 privp->buffer_pool_index = vlib_buffer_add_physmem_region (vm, pri);
561 dm->pktmbuf_pools[socket_id] = rmp;
566 clib_error_report (error);
568 /* no usable pool for this socket, try to use pool from another one */
569 for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
571 if (dm->pktmbuf_pools[i])
573 clib_warning ("WARNING: Failed to allocate mempool for CPU socket "
574 "%u. Threads running on socket %u will use socket %u "
575 "mempool.", socket_id, socket_id, i);
576 dm->pktmbuf_pools[socket_id] = dm->pktmbuf_pools[i];
581 return clib_error_return (0, "failed to allocate mempool on socket %u",
587 u32 *vlib_buffer_state_validation_lock;
588 uword *vlib_buffer_state_validation_hash;
589 void *vlib_buffer_state_heap;
591 static clib_error_t *
592 buffer_state_validation_init (vlib_main_t * vm)
596 vlib_buffer_state_heap = mheap_alloc (0, 10 << 20);
598 oldheap = clib_mem_set_heap (vlib_buffer_state_heap);
600 vlib_buffer_state_validation_hash = hash_create (0, sizeof (uword));
601 vec_validate_aligned (vlib_buffer_state_validation_lock, 0,
602 CLIB_CACHE_LINE_BYTES);
603 clib_mem_set_heap (oldheap);
607 VLIB_INIT_FUNCTION (buffer_state_validation_init);
611 struct dpdk_validate_buf_result
617 #define DPDK_TRAJECTORY_POISON 31
620 dpdk_buffer_validate_trajectory (struct rte_mempool *mp, void *opaque,
621 void *obj, unsigned obj_idx)
624 struct dpdk_validate_buf_result *counter = opaque;
625 b = vlib_buffer_from_rte_mbuf ((struct rte_mbuf *) obj);
626 if (b->pre_data[0] != 0)
628 if (b->pre_data[0] == DPDK_TRAJECTORY_POISON)
629 counter->uninitialized++;
636 dpdk_buffer_validate_trajectory_all (u32 * uninitialized)
638 dpdk_main_t *dm = &dpdk_main;
639 struct dpdk_validate_buf_result counter = { 0 };
642 for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
643 rte_mempool_obj_iter (dm->pktmbuf_pools[i],
644 dpdk_buffer_validate_trajectory, &counter);
646 *uninitialized = counter.uninitialized;
647 return counter.invalid;
651 dpdk_buffer_poison_trajectory (struct rte_mempool *mp, void *opaque,
652 void *obj, unsigned obj_idx)
655 b = vlib_buffer_from_rte_mbuf ((struct rte_mbuf *) obj);
656 b->pre_data[0] = DPDK_TRAJECTORY_POISON;
660 dpdk_buffer_poison_trajectory_all (void)
662 dpdk_main_t *dm = &dpdk_main;
665 for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
666 rte_mempool_obj_iter (dm->pktmbuf_pools[i], dpdk_buffer_poison_trajectory,
671 static clib_error_t *
672 dpdk_buffer_init (vlib_main_t * vm)
674 dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
675 vlib_thread_main_t *tm = vlib_get_thread_main ();
676 vec_validate_aligned (dbm->ptd, tm->n_vlib_mains - 1,
677 CLIB_CACHE_LINE_BYTES);
681 VLIB_INIT_FUNCTION (dpdk_buffer_init);
684 VLIB_BUFFER_REGISTER_CALLBACKS (dpdk, static) = {
685 .vlib_buffer_fill_free_list_cb = &dpdk_buffer_fill_free_list,
686 .vlib_buffer_free_cb = &dpdk_buffer_free,
687 .vlib_buffer_free_no_next_cb = &dpdk_buffer_free_no_next,
688 .vlib_packet_template_init_cb = &dpdk_packet_template_init,
689 .vlib_buffer_delete_free_list_cb = &dpdk_buffer_delete_free_list,
694 vlib_buffer_fill_free_list_cb_t __clib_weak dpdk_buffer_fill_free_list_avx512;
695 vlib_buffer_fill_free_list_cb_t __clib_weak dpdk_buffer_fill_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_fill_free_list_avx512 && clib_cpu_supports_avx512f ())
707 cb->vlib_buffer_fill_free_list_cb = dpdk_buffer_fill_free_list_avx512;
708 cb->vlib_buffer_free_cb = dpdk_buffer_free_avx512;
709 cb->vlib_buffer_free_no_next_cb = dpdk_buffer_free_no_next_avx512;
711 else if (dpdk_buffer_fill_free_list_avx2 && clib_cpu_supports_avx2 ())
713 cb->vlib_buffer_fill_free_list_cb = dpdk_buffer_fill_free_list_avx2;
714 cb->vlib_buffer_free_cb = dpdk_buffer_free_avx2;
715 cb->vlib_buffer_free_no_next_cb = dpdk_buffer_free_no_next_avx2;
723 * fd.io coding-style-patch-verification: ON
726 * eval: (c-set-style "gnu")