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 * 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 <vppinfra/linux/sysfs.h>
47 #include <vlib/vlib.h>
48 #include <vlib/unix/unix.h>
49 #include <vpp/stats/stat_segment.h>
51 #define VLIB_BUFFER_DEFAULT_BUFFERS_PER_NUMA 16384
52 #define VLIB_BUFFER_DEFAULT_BUFFERS_PER_NUMA_UNPRIV 8192
54 #ifdef CLIB_HAVE_VEC128
55 /* Assumptions by vlib_buffer_free_inline: */
56 STATIC_ASSERT_FITS_IN (vlib_buffer_t, flags, 16);
57 STATIC_ASSERT_FITS_IN (vlib_buffer_t, ref_count, 16);
58 STATIC_ASSERT_FITS_IN (vlib_buffer_t, buffer_pool_index, 16);
61 /* Make sure that buffer template size is not accidentally changed */
62 STATIC_ASSERT_OFFSET_OF (vlib_buffer_t, template_end, 64);
64 u16 __vlib_buffer_external_hdr_size = 0;
67 vlib_buffer_length_in_chain_slow_path (vlib_main_t * vm,
68 vlib_buffer_t * b_first)
70 vlib_buffer_t *b = b_first;
71 uword l_first = b_first->current_length;
73 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
75 b = vlib_get_buffer (vm, b->next_buffer);
76 l += b->current_length;
78 b_first->total_length_not_including_first_buffer = l;
79 b_first->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
84 format_vlib_buffer (u8 * s, va_list * args)
86 vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *);
87 u32 indent = format_get_indent (s);
90 #define _(bit, name, v) \
91 if (v && (b->flags & VLIB_BUFFER_##name)) \
92 a = format (a, "%s ", v);
93 foreach_vlib_buffer_flag
95 s = format (s, "current data %d, length %d, buffer-pool %d, "
96 "ref-count %u", b->current_data, b->current_length,
97 b->buffer_pool_index, b->ref_count);
99 if (b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)
100 s = format (s, ", totlen-nifb %d",
101 b->total_length_not_including_first_buffer);
103 if (b->flags & VLIB_BUFFER_IS_TRACED)
104 s = format (s, ", trace 0x%x", b->trace_index);
107 s = format (s, "\n%U%v", format_white_space, indent, a);
110 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
112 vlib_main_t *vm = vlib_get_main ();
113 u32 next_buffer = b->next_buffer;
114 b = vlib_get_buffer (vm, next_buffer);
117 format (s, "\n%Unext-buffer 0x%x, segment length %d, ref-count %u",
118 format_white_space, indent, next_buffer, b->current_length,
126 format_vlib_buffer_and_data (u8 * s, va_list * args)
128 vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *);
130 s = format (s, "%U, %U",
131 format_vlib_buffer, b,
132 format_hex_bytes, vlib_buffer_get_current (b), 64);
138 format_vlib_buffer_known_state (u8 * s, va_list * args)
140 vlib_buffer_known_state_t state = va_arg (*args, vlib_buffer_known_state_t);
145 case VLIB_BUFFER_UNKNOWN:
149 case VLIB_BUFFER_KNOWN_ALLOCATED:
150 t = "known-allocated";
153 case VLIB_BUFFER_KNOWN_FREE:
162 return format (s, "%s", t);
166 format_vlib_buffer_contents (u8 * s, va_list * va)
168 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
169 vlib_buffer_t *b = va_arg (*va, vlib_buffer_t *);
173 vec_add (s, vlib_buffer_get_current (b), b->current_length);
174 if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
176 b = vlib_get_buffer (vm, b->next_buffer);
183 vlib_validate_buffer_helper (vlib_main_t * vm,
185 uword follow_buffer_next, uword ** unique_hash)
187 vlib_buffer_main_t *bm = vm->buffer_main;
188 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
190 if (vec_len (bm->buffer_pools) <= b->buffer_pool_index)
191 return format (0, "unknown buffer pool 0x%x", b->buffer_pool_index);
193 if ((signed) b->current_data < (signed) -VLIB_BUFFER_PRE_DATA_SIZE)
194 return format (0, "current data %d before pre-data", b->current_data);
196 if (b->current_data + b->current_length >
197 vlib_buffer_get_default_data_size (vm))
198 return format (0, "%d-%d beyond end of buffer %d", b->current_data,
199 b->current_length, vlib_buffer_get_default_data_size (vm));
201 if (follow_buffer_next && (b->flags & VLIB_BUFFER_NEXT_PRESENT))
203 vlib_buffer_known_state_t k;
206 k = vlib_buffer_is_known (vm, b->next_buffer);
207 if (k != VLIB_BUFFER_KNOWN_ALLOCATED)
208 return format (0, "next 0x%x: %U",
209 b->next_buffer, format_vlib_buffer_known_state, k);
213 if (hash_get (*unique_hash, b->next_buffer))
214 return format (0, "duplicate buffer 0x%x", b->next_buffer);
216 hash_set1 (*unique_hash, b->next_buffer);
219 msg = vlib_validate_buffer (vm, b->next_buffer, follow_buffer_next);
222 result = format (0, "next 0x%x: %v", b->next_buffer, msg);
232 vlib_validate_buffer (vlib_main_t * vm, u32 bi, uword follow_buffer_next)
234 return vlib_validate_buffer_helper (vm, bi, follow_buffer_next,
235 /* unique_hash */ 0);
239 vlib_validate_buffers (vlib_main_t * vm,
241 uword next_buffer_stride,
243 vlib_buffer_known_state_t known_state,
244 uword follow_buffer_next)
247 u32 bi, *b = buffers;
248 vlib_buffer_known_state_t k;
249 u8 *msg = 0, *result = 0;
251 hash = hash_create (0, 0);
252 for (i = 0; i < n_buffers; i++)
255 b += next_buffer_stride;
257 /* Buffer is not unique. */
258 if (hash_get (hash, bi))
260 msg = format (0, "not unique");
264 k = vlib_buffer_is_known (vm, bi);
265 if (k != known_state)
267 msg = format (0, "is %U; expected %U",
268 format_vlib_buffer_known_state, k,
269 format_vlib_buffer_known_state, known_state);
273 msg = vlib_validate_buffer_helper (vm, bi, follow_buffer_next, &hash);
277 hash_set1 (hash, bi);
283 result = format (0, "0x%x: %v", bi, msg);
291 * Hand-craft a static vector w/ length 1, so vec_len(vlib_mains) =1
292 * and vlib_mains[0] = &vlib_global_main from the beginning of time.
294 * The only place which should ever expand vlib_mains is start_workers()
295 * in threads.c. It knows about the bootstrap vector.
302 } __attribute__ ((packed)) __bootstrap_vlib_main_vector
303 __attribute__ ((aligned (CLIB_CACHE_LINE_BYTES))) =
306 .vm = &vlib_global_main,
310 vlib_main_t **vlib_mains = &__bootstrap_vlib_main_vector.vm;
313 /* When dubugging validate that given buffers are either known allocated
316 vlib_buffer_validate_alloc_free (vlib_main_t * vm,
319 vlib_buffer_known_state_t expected_state)
321 vlib_buffer_main_t *bm = vm->buffer_main;
323 uword i, bi, is_free;
328 is_free = expected_state == VLIB_BUFFER_KNOWN_ALLOCATED;
330 for (i = 0; i < n_buffers; i++)
332 vlib_buffer_known_state_t known;
336 known = vlib_buffer_is_known (vm, bi);
338 if (known == VLIB_BUFFER_UNKNOWN &&
339 expected_state == VLIB_BUFFER_KNOWN_FREE)
340 known = VLIB_BUFFER_KNOWN_FREE;
342 if (known != expected_state)
344 clib_panic ("%s %U buffer 0x%x", is_free ? "freeing" : "allocating",
345 format_vlib_buffer_known_state, known, bi);
348 clib_spinlock_lock (&bm->buffer_known_hash_lockp);
349 hash_set (bm->buffer_known_hash, bi, is_free ? VLIB_BUFFER_KNOWN_FREE :
350 VLIB_BUFFER_KNOWN_ALLOCATED);
351 clib_spinlock_unlock (&bm->buffer_known_hash_lockp);
356 vlib_packet_template_init (vlib_main_t * vm,
357 vlib_packet_template_t * t,
359 uword n_packet_data_bytes,
360 uword min_n_buffers_each_alloc, char *fmt, ...)
365 t->name = va_format (0, fmt, &va);
368 vlib_worker_thread_barrier_sync (vm);
370 clib_memset (t, 0, sizeof (t[0]));
372 vec_add (t->packet_data, packet_data, n_packet_data_bytes);
373 t->min_n_buffers_each_alloc = min_n_buffers_each_alloc;
374 vlib_worker_thread_barrier_release (vm);
378 vlib_packet_template_get_packet (vlib_main_t * vm,
379 vlib_packet_template_t * t, u32 * bi_result)
384 if (vlib_buffer_alloc (vm, &bi, 1) != 1)
389 b = vlib_get_buffer (vm, bi);
390 clib_memcpy_fast (vlib_buffer_get_current (b),
391 t->packet_data, vec_len (t->packet_data));
392 b->current_length = vec_len (t->packet_data);
397 /* Append given data to end of buffer, possibly allocating new buffers. */
399 vlib_buffer_add_data (vlib_main_t * vm, u32 * buffer_index, void *data,
402 u32 n_buffer_bytes, n_left, n_left_this_buffer, bi;
407 if (bi == ~0 && 1 != vlib_buffer_alloc (vm, &bi, 1))
411 n_left = n_data_bytes;
412 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
414 b = vlib_get_buffer (vm, bi);
415 b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
417 /* Get to the end of the chain before we try to append data... */
418 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
419 b = vlib_get_buffer (vm, b->next_buffer);
425 ASSERT (n_buffer_bytes >= b->current_length);
427 n_buffer_bytes - (b->current_data + b->current_length);
428 n = clib_min (n_left_this_buffer, n_left);
429 clib_memcpy_fast (vlib_buffer_get_current (b) + b->current_length, d,
431 b->current_length += n;
437 if (1 != vlib_buffer_alloc (vm, &b->next_buffer, 1))
440 b->flags |= VLIB_BUFFER_NEXT_PRESENT;
442 b = vlib_get_buffer (vm, b->next_buffer);
449 clib_warning ("out of buffers");
454 vlib_buffer_chain_append_data_with_alloc (vlib_main_t * vm,
455 vlib_buffer_t * first,
456 vlib_buffer_t ** last, void *data,
459 vlib_buffer_t *l = *last;
460 u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
462 ASSERT (n_buffer_bytes >= l->current_length + l->current_data);
465 u16 max = n_buffer_bytes - l->current_length - l->current_data;
468 if (1 != vlib_buffer_alloc_from_pool (vm, &l->next_buffer, 1,
469 first->buffer_pool_index))
471 *last = l = vlib_buffer_chain_buffer (vm, l, l->next_buffer);
472 max = n_buffer_bytes - l->current_length - l->current_data;
475 u16 len = (data_len > max) ? max : data_len;
476 clib_memcpy_fast (vlib_buffer_get_current (l) + l->current_length,
478 vlib_buffer_chain_increase_length (first, l, len);
486 vlib_buffer_pool_create (vlib_main_t * vm, u8 index, char *name,
487 u32 data_size, u32 physmem_map_index)
489 vlib_buffer_main_t *bm = vm->buffer_main;
490 vlib_buffer_pool_t *bp;
491 vlib_physmem_map_t *m = vlib_physmem_get_map (vm, physmem_map_index);
492 uword start = pointer_to_uword (m->base);
493 uword size = (uword) m->n_pages << m->log2_page_size;
495 u32 alloc_size, n_alloc_per_page;;
497 vec_validate_aligned (bm->buffer_pools, index, CLIB_CACHE_LINE_BYTES);
498 bp = vec_elt_at_index (bm->buffer_pools, index);
501 return clib_error_return (0, "buffer with index %u already exists",
505 return clib_error_return (0, "buffer index must be < 255", index);
507 if (bm->buffer_mem_size == 0)
509 bm->buffer_mem_start = start;
510 bm->buffer_mem_size = size;
512 else if (start < bm->buffer_mem_start)
514 bm->buffer_mem_size += bm->buffer_mem_start - start;
515 bm->buffer_mem_start = start;
516 if (size > bm->buffer_mem_size)
517 bm->buffer_mem_size = size;
519 else if (start > bm->buffer_mem_start)
521 uword new_size = start - bm->buffer_mem_start + size;
522 if (new_size > bm->buffer_mem_size)
523 bm->buffer_mem_size = new_size;
526 if ((u64) bm->buffer_mem_size >
527 ((u64) 1 << (32 + CLIB_LOG2_CACHE_LINE_BYTES)))
529 clib_panic ("buffer memory size out of range!");
534 bp->index = bp - bm->buffer_pools;
535 bp->buffer_template.buffer_pool_index = bp->index;
536 bp->buffer_template.ref_count = 1;
537 bp->physmem_map_index = physmem_map_index;
538 bp->name = format (0, "%s%c", name, 0);
539 bp->data_size = data_size;
540 bp->numa_node = m->numa_node;
542 vec_validate_aligned (bp->threads, vec_len (vlib_mains) - 1,
543 CLIB_CACHE_LINE_BYTES);
545 alloc_size = data_size + sizeof (vlib_buffer_t) + bm->ext_hdr_size;
546 n_alloc_per_page = (1ULL << m->log2_page_size) / alloc_size;
548 /* preallocate buffer indices memory */
549 vec_validate_aligned (bp->buffers, m->n_pages * n_alloc_per_page,
550 CLIB_CACHE_LINE_BYTES);
551 vec_reset_length (bp->buffers);
553 clib_spinlock_init (&bp->lock);
555 for (j = 0; j < m->n_pages; j++)
556 for (i = 0; i < n_alloc_per_page; i++)
561 p = m->base + (j << m->log2_page_size) + i * alloc_size;
562 p += bm->ext_hdr_size;
564 vlib_buffer_copy_template ((vlib_buffer_t *) p, &bp->buffer_template);
566 bi = vlib_get_buffer_index (vm, (vlib_buffer_t *) p);
568 vec_add1_aligned (bp->buffers, bi, CLIB_CACHE_LINE_BYTES);
569 vlib_get_buffer (vm, bi);
572 bp->n_buffers = vec_len (bp->buffers);
578 format_vlib_buffer_pool (u8 * s, va_list * va)
580 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
581 vlib_buffer_pool_t *bp = va_arg (*va, vlib_buffer_pool_t *);
582 vlib_buffer_pool_thread_t *bpt;
586 return format (s, "%-20s%=6s%=6s%=6s%=11s%=6s%=8s%=8s%=8s",
587 "Pool Name", "Index", "NUMA", "Size", "Data Size",
588 "Total", "Avail", "Cached", "Used");
591 vec_foreach (bpt, bp->threads)
592 cached += vec_len (bpt->cached_buffers);
595 s = format (s, "%-20s%=6d%=6d%=6u%=11u%=6u%=8u%=8u%=8u",
596 bp->name, bp->index, bp->numa_node, bp->data_size +
597 sizeof (vlib_buffer_t) + vm->buffer_main->ext_hdr_size,
598 bp->data_size, bp->n_buffers, vec_len (bp->buffers), cached,
599 bp->n_buffers - vec_len (bp->buffers) - cached);
604 static clib_error_t *
605 show_buffers (vlib_main_t * vm,
606 unformat_input_t * input, vlib_cli_command_t * cmd)
608 vlib_buffer_main_t *bm = vm->buffer_main;
609 vlib_buffer_pool_t *bp;
611 vlib_cli_output (vm, "%U", format_vlib_buffer_pool, vm, 0);
614 vec_foreach (bp, bm->buffer_pools)
615 vlib_cli_output (vm, "%U", format_vlib_buffer_pool, vm, bp);
622 VLIB_CLI_COMMAND (show_buffers_command, static) = {
623 .path = "show buffers",
624 .short_help = "Show packet buffer allocation",
625 .function = show_buffers,
630 vlib_buffer_worker_init (vlib_main_t * vm)
632 vlib_buffer_main_t *bm = vm->buffer_main;
633 vlib_buffer_pool_t *bp;
636 vec_foreach (bp, bm->buffer_pools)
638 clib_spinlock_lock (&bp->lock);
639 vec_validate_aligned (bp->threads, vec_len (vlib_mains) - 1,
640 CLIB_CACHE_LINE_BYTES);
641 clib_spinlock_unlock (&bp->lock);
648 VLIB_WORKER_INIT_FUNCTION (vlib_buffer_worker_init);
650 static clib_error_t *
651 vlib_buffer_main_init_numa_node (struct vlib_main_t *vm, u32 numa_node)
653 vlib_buffer_main_t *bm = vm->buffer_main;
655 u32 physmem_map_index;
656 uword n_pages, pagesize;
657 u32 buffers_per_numa;
658 u32 buffer_size = CLIB_CACHE_LINE_ROUND (bm->ext_hdr_size +
659 sizeof (vlib_buffer_t) +
660 vlib_buffer_get_default_data_size
664 pagesize = clib_mem_get_default_hugepage_size ();
665 name = format (0, "buffers-numa-%d%c", numa_node, 0);
667 buffers_per_numa = bm->buffers_per_numa ? bm->buffers_per_numa :
668 VLIB_BUFFER_DEFAULT_BUFFERS_PER_NUMA;
671 n_pages = (buffers_per_numa - 1) / (pagesize / buffer_size) + 1;
672 error = vlib_physmem_shared_map_create (vm, (char *) name,
674 min_log2 (pagesize), numa_node,
677 if (error && pagesize != clib_mem_get_page_size ())
679 vlib_log_warn (bm->log_default, "%U", format_clib_error, error);
680 clib_error_free (error);
681 vlib_log_warn (bm->log_default, "falling back to non-hugepage "
682 "backed buffer pool");
683 pagesize = clib_mem_get_page_size ();
684 buffers_per_numa = bm->buffers_per_numa ? bm->buffers_per_numa :
685 VLIB_BUFFER_DEFAULT_BUFFERS_PER_NUMA_UNPRIV;
692 vec_reset_length (name);
693 name = format (name, "default-numa-%d%c", numa_node, 0);
695 return vlib_buffer_pool_create (vm, numa_node, (char *) name,
696 vlib_buffer_get_default_data_size (vm),
701 vlib_buffer_main_alloc (vlib_main_t * vm)
703 vlib_buffer_main_t *bm;
708 vm->buffer_main = bm = clib_mem_alloc (sizeof (bm[0]));
709 clib_memset (vm->buffer_main, 0, sizeof (bm[0]));
710 bm->default_data_size = VLIB_BUFFER_DEFAULT_DATA_SIZE;
714 buffer_get_cached (vlib_buffer_pool_t * bp)
717 vlib_buffer_pool_thread_t *bpt;
720 vec_foreach (bpt, bp->threads)
721 cached += vec_len (bpt->cached_buffers);
727 static vlib_buffer_pool_t *
728 buffer_get_by_name (vlib_buffer_main_t * bm, char *name)
730 vlib_buffer_pool_t *bp;
731 vec_foreach (bp, bm->buffer_pools)
733 if (!strcmp ((char *) bp->name, name))
741 buffer_gauges_update_used_fn (stat_segment_directory_entry_t * e)
743 vlib_main_t *vm = vlib_get_main ();
744 vlib_buffer_pool_t *bp;
746 bp = buffer_get_by_name (vm->buffer_main,
747 &e->name[sizeof ("/buffer/used/") - 1]);
751 e->value = bp->n_buffers - vec_len (bp->buffers) - buffer_get_cached (bp);
755 buffer_gauges_update_available_fn (stat_segment_directory_entry_t * e)
757 vlib_main_t *vm = vlib_get_main ();
758 vlib_buffer_pool_t *bp;
760 bp = buffer_get_by_name (vm->buffer_main,
761 &e->name[sizeof ("/buffer/available/") - 1]);
765 e->value = vec_len (bp->buffers);
769 buffer_gauges_update_cached_fn (stat_segment_directory_entry_t * e)
771 vlib_main_t *vm = vlib_get_main ();
772 vlib_buffer_pool_t *bp;
774 bp = buffer_get_by_name (vm->buffer_main,
775 &e->name[sizeof ("/buffer/cached/") - 1]);
779 e->value = buffer_get_cached (bp);
783 vlib_buffer_main_init (struct vlib_main_t * vm)
785 vlib_buffer_main_t *bm;
787 clib_bitmap_t *bmp = 0;
789 vlib_buffer_pool_t *bp;
792 vlib_buffer_main_alloc (vm);
794 bm = vm->buffer_main;
795 bm->log_default = vlib_log_register_class ("buffer", 0);
796 bm->ext_hdr_size = __vlib_buffer_external_hdr_size;
798 clib_spinlock_init (&bm->buffer_known_hash_lockp);
800 err = clib_sysfs_read ("/sys/devices/system/node/possible", "%U",
801 unformat_bitmap_list, &bmp);
804 /* no info from sysfs, assuming that only numa 0 exists */
805 clib_error_free (err);
806 bmp = clib_bitmap_set (bmp, 0, 1);
810 clib_bitmap_foreach (numa_node, bmp, {
811 if ((err = vlib_buffer_main_init_numa_node(vm, numa_node)))
816 bm->n_numa_nodes = clib_bitmap_last_set (bmp) + 1;
818 vec_foreach (bp, bm->buffer_pools)
820 name = format (0, "/buffer/cached/%s%c", bp->name, 0);
821 stat_segment_register_gauge (name, buffer_gauges_update_cached_fn);
823 name = format (0, "/buffer/used/%s%c", bp->name, 0);
824 stat_segment_register_gauge (name, buffer_gauges_update_used_fn);
826 name = format (0, "/buffer/available/%s%c", bp->name, 0);
827 stat_segment_register_gauge (name, buffer_gauges_update_available_fn);
837 static clib_error_t *
838 vlib_buffers_configure (vlib_main_t * vm, unformat_input_t * input)
840 vlib_buffer_main_t *bm;
842 vlib_buffer_main_alloc (vm);
844 bm = vm->buffer_main;
846 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
848 if (unformat (input, "buffers-per-numa %u", &bm->buffers_per_numa))
850 else if (unformat (input, "default data-size %u",
851 &bm->default_data_size))
854 return unformat_parse_error (input);
857 unformat_free (input);
861 VLIB_EARLY_CONFIG_FUNCTION (vlib_buffers_configure, "buffers");
866 * fd.io coding-style-patch-verification: ON
869 * eval: (c-set-style "gnu")