Line data Source code
1 : /*
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:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
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.
14 : */
15 :
16 : /** @cond DOCUMENTATION_IS_IN_BIHASH_DOC_H */
17 :
18 : #ifndef MAP_HUGE_SHIFT
19 : #define MAP_HUGE_SHIFT 26
20 : #endif
21 :
22 : #ifndef BIIHASH_MIN_ALLOC_LOG2_PAGES
23 : #define BIIHASH_MIN_ALLOC_LOG2_PAGES 10
24 : #endif
25 :
26 : #ifndef BIHASH_USE_HEAP
27 : #define BIHASH_USE_HEAP 1
28 : #endif
29 :
30 140355 : static inline void *BV (alloc_aligned) (BVT (clib_bihash) * h, uword nbytes)
31 : {
32 : uword rv;
33 :
34 : /* Round to an even number of cache lines */
35 140355 : nbytes = round_pow2 (nbytes, CLIB_CACHE_LINE_BYTES);
36 :
37 : if (BIHASH_USE_HEAP)
38 : {
39 : void *rv, *oldheap;
40 140355 : uword page_sz = sizeof (BVT (clib_bihash_value));
41 140355 : uword chunk_sz = round_pow2 (page_sz << BIIHASH_MIN_ALLOC_LOG2_PAGES,
42 : CLIB_CACHE_LINE_BYTES);
43 :
44 140355 : BVT (clib_bihash_alloc_chunk) * chunk = h->chunks;
45 :
46 : /* if there is enough space in the currenrt chunk */
47 140355 : if (chunk && chunk->bytes_left >= nbytes)
48 : {
49 129814 : rv = chunk->next_alloc;
50 129814 : chunk->bytes_left -= nbytes;
51 129814 : chunk->next_alloc += nbytes;
52 129814 : return rv;
53 : }
54 :
55 : /* requested allocation is bigger than chunk size */
56 10541 : if (nbytes >= chunk_sz)
57 : {
58 8509 : oldheap = clib_mem_set_heap (h->heap);
59 8509 : chunk = clib_mem_alloc_aligned (nbytes + sizeof (*chunk),
60 : CLIB_CACHE_LINE_BYTES);
61 8509 : clib_mem_set_heap (oldheap);
62 8509 : clib_memset_u8 (chunk, 0, sizeof (*chunk));
63 8509 : chunk->size = nbytes;
64 8509 : rv = (u8 *) (chunk + 1);
65 8509 : if (h->chunks)
66 : {
67 : /* take 2nd place in the list */
68 0 : chunk->next = h->chunks->next;
69 0 : chunk->prev = h->chunks;
70 0 : h->chunks->next = chunk;
71 0 : if (chunk->next)
72 0 : chunk->next->prev = chunk;
73 : }
74 : else
75 8509 : h->chunks = chunk;
76 :
77 8509 : return rv;
78 : }
79 :
80 2032 : oldheap = clib_mem_set_heap (h->heap);
81 2032 : chunk = clib_mem_alloc_aligned (chunk_sz + sizeof (*chunk),
82 : CLIB_CACHE_LINE_BYTES);
83 2032 : clib_mem_set_heap (oldheap);
84 2032 : chunk->size = chunk_sz;
85 2032 : chunk->bytes_left = chunk_sz;
86 2032 : chunk->next_alloc = (u8 *) (chunk + 1);
87 2032 : chunk->next = h->chunks;
88 2032 : chunk->prev = 0;
89 2032 : if (chunk->next)
90 1854 : chunk->next->prev = chunk;
91 2032 : h->chunks = chunk;
92 2032 : rv = chunk->next_alloc;
93 2032 : chunk->bytes_left -= nbytes;
94 2032 : chunk->next_alloc += nbytes;
95 2032 : return rv;
96 : }
97 :
98 : rv = alloc_arena_next (h);
99 : alloc_arena_next (h) += nbytes;
100 :
101 : if (alloc_arena_next (h) > alloc_arena_size (h))
102 : os_out_of_memory ();
103 :
104 : if (alloc_arena_next (h) > alloc_arena_mapped (h))
105 : {
106 : void *base, *rv;
107 : uword alloc = alloc_arena_next (h) - alloc_arena_mapped (h);
108 : int mmap_flags = MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS;
109 : int mmap_flags_huge = (mmap_flags | MAP_HUGETLB | MAP_LOCKED |
110 : BIHASH_LOG2_HUGEPAGE_SIZE << MAP_HUGE_SHIFT);
111 :
112 : /* new allocation is 25% of existing one */
113 : if (alloc_arena_mapped (h) >> 2 > alloc)
114 : alloc = alloc_arena_mapped (h) >> 2;
115 :
116 : /* round allocation to page size */
117 : alloc = round_pow2 (alloc, 1 << BIHASH_LOG2_HUGEPAGE_SIZE);
118 :
119 : base = (void *) (uword) (alloc_arena (h) + alloc_arena_mapped (h));
120 :
121 : rv = mmap (base, alloc, PROT_READ | PROT_WRITE, mmap_flags_huge, -1, 0);
122 :
123 : /* fallback - maybe we are still able to allocate normal pages */
124 : if (rv == MAP_FAILED || mlock (base, alloc) != 0)
125 : rv = mmap (base, alloc, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
126 :
127 : if (rv == MAP_FAILED)
128 : os_out_of_memory ();
129 :
130 : alloc_arena_mapped (h) += alloc;
131 : }
132 :
133 : return (void *) (uword) (rv + alloc_arena (h));
134 : }
135 :
136 8687 : static void BV (clib_bihash_instantiate) (BVT (clib_bihash) * h)
137 : {
138 : uword bucket_size;
139 :
140 : if (BIHASH_USE_HEAP)
141 : {
142 8687 : h->heap = clib_mem_get_heap ();
143 8687 : h->chunks = 0;
144 8687 : alloc_arena (h) = (uword) clib_mem_get_heap_base (h->heap);
145 : }
146 : else
147 : {
148 : alloc_arena (h) = clib_mem_vm_reserve (0, h->memory_size,
149 : BIHASH_LOG2_HUGEPAGE_SIZE);
150 : if (alloc_arena (h) == ~0)
151 : os_out_of_memory ();
152 : alloc_arena_next (h) = 0;
153 : alloc_arena_size (h) = h->memory_size;
154 : alloc_arena_mapped (h) = 0;
155 : }
156 :
157 8687 : bucket_size = h->nbuckets * sizeof (h->buckets[0]);
158 :
159 : if (BIHASH_KVP_AT_BUCKET_LEVEL)
160 6559 : bucket_size +=
161 6559 : h->nbuckets * BIHASH_KVP_PER_PAGE * sizeof (BVT (clib_bihash_kv));
162 :
163 8687 : h->buckets = BV (alloc_aligned) (h, bucket_size);
164 8687 : clib_memset_u8 (h->buckets, 0, bucket_size);
165 :
166 : if (BIHASH_KVP_AT_BUCKET_LEVEL)
167 : {
168 : int i, j;
169 : BVT (clib_bihash_bucket) * b;
170 :
171 6559 : b = h->buckets;
172 :
173 151137130 : for (i = 0; i < h->nbuckets; i++)
174 : {
175 : BVT (clib_bihash_kv) * v;
176 151130328 : b->offset = BV (clib_bihash_get_offset) (h, (void *) (b + 1));
177 151130328 : b->refcnt = 1;
178 : /* Mark all elements free */
179 151130328 : v = (void *) (b + 1);
180 1138752384 : for (j = 0; j < BIHASH_KVP_PER_PAGE; j++)
181 : {
182 987621556 : BV (clib_bihash_mark_free) (v);
183 987621556 : v++;
184 : }
185 : /* Compute next bucket start address */
186 151130328 : b = (void *) (((uword) b) + sizeof (*b) +
187 : (BIHASH_KVP_PER_PAGE *
188 : sizeof (BVT (clib_bihash_kv))));
189 : }
190 : }
191 8687 : CLIB_MEMORY_STORE_BARRIER ();
192 8687 : h->instantiated = 1;
193 8687 : }
194 :
195 18820 : void BV (clib_bihash_init2) (BVT (clib_bihash_init2_args) * a)
196 : {
197 : int i;
198 : void *oldheap;
199 18820 : BVT (clib_bihash) * h = a->h;
200 :
201 18820 : a->nbuckets = 1 << (max_log2 (a->nbuckets));
202 :
203 18820 : h->name = (u8 *) a->name;
204 18820 : h->nbuckets = a->nbuckets;
205 18820 : h->log2_nbuckets = max_log2 (a->nbuckets);
206 18820 : h->memory_size = BIHASH_USE_HEAP ? 0 : a->memory_size;
207 18820 : h->instantiated = 0;
208 18820 : h->dont_add_to_all_bihash_list = a->dont_add_to_all_bihash_list;
209 18820 : h->fmt_fn = BV (format_bihash);
210 18820 : h->kvp_fmt_fn = a->kvp_fmt_fn;
211 :
212 18820 : alloc_arena (h) = 0;
213 :
214 : /*
215 : * Make sure the requested size is rational. The max table
216 : * size without playing the alignment card is 64 Gbytes.
217 : * If someone starts complaining that's not enough, we can shift
218 : * the offset by CLIB_LOG2_CACHE_LINE_BYTES...
219 : */
220 : if (BIHASH_USE_HEAP)
221 18820 : ASSERT (h->memory_size < (1ULL << BIHASH_BUCKET_OFFSET_BITS));
222 :
223 : /* Add this hash table to the list */
224 18820 : if (a->dont_add_to_all_bihash_list == 0)
225 : {
226 269644 : for (i = 0; i < vec_len (clib_all_bihashes); i++)
227 252598 : if (clib_all_bihashes[i] == h)
228 14 : goto do_lock;
229 17046 : oldheap = clib_all_bihash_set_heap ();
230 17046 : vec_add1 (clib_all_bihashes, (void *) h);
231 17046 : clib_mem_set_heap (oldheap);
232 : }
233 :
234 1760 : do_lock:
235 18820 : if (h->alloc_lock)
236 14 : clib_mem_free ((void *) h->alloc_lock);
237 :
238 : /*
239 : * Set up the lock now, so we can use it to make the first add
240 : * thread-safe
241 : */
242 18820 : h->alloc_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
243 : CLIB_CACHE_LINE_BYTES);
244 18820 : h->alloc_lock[0] = 0;
245 :
246 : #if BIHASH_LAZY_INSTANTIATE
247 12263 : if (a->instantiate_immediately)
248 : #endif
249 6843 : BV (clib_bihash_instantiate) (h);
250 18820 : }
251 :
252 17060 : void BV (clib_bihash_init)
253 : (BVT (clib_bihash) * h, char *name, u32 nbuckets, uword memory_size)
254 : {
255 17060 : BVT (clib_bihash_init2_args) _a, *a = &_a;
256 :
257 17060 : memset (a, 0, sizeof (*a));
258 :
259 17060 : a->h = h;
260 17060 : a->name = name;
261 17060 : a->nbuckets = nbuckets;
262 17060 : a->memory_size = memory_size;
263 :
264 17060 : BV (clib_bihash_init2) (a);
265 17060 : }
266 :
267 : #if BIHASH_32_64_SVM
268 : #if !defined (MFD_ALLOW_SEALING)
269 : #define MFD_ALLOW_SEALING 0x0002U
270 : #endif
271 :
272 : void BV (clib_bihash_initiator_init_svm)
273 : (BVT (clib_bihash) * h, char *name, u32 nbuckets, u64 memory_size)
274 : {
275 : uword bucket_size;
276 : u8 *mmap_addr;
277 : vec_header_t *freelist_vh;
278 : int fd;
279 :
280 : ASSERT (BIHASH_USE_HEAP == 0);
281 :
282 : ASSERT (memory_size < (1ULL << 32));
283 : /* Set up for memfd sharing */
284 : if ((fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT, name) == -1)
285 : {
286 : clib_unix_warning ("memfd_create");
287 : return;
288 : }
289 :
290 : if (ftruncate (fd, memory_size) < 0)
291 : {
292 : clib_unix_warning ("ftruncate");
293 : return;
294 : }
295 :
296 : /* Not mission-critical, complain and continue */
297 : if ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
298 : clib_unix_warning ("fcntl (F_ADD_SEALS)");
299 :
300 : mmap_addr = mmap (0, memory_size,
301 : PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 /* offset */ );
302 :
303 : if (mmap_addr == MAP_FAILED)
304 : {
305 : clib_unix_warning ("mmap failed");
306 : ASSERT (0);
307 : }
308 :
309 : h->sh = (void *) mmap_addr;
310 : h->memfd = fd;
311 : nbuckets = 1 << (max_log2 (nbuckets));
312 :
313 : h->name = (u8 *) name;
314 : h->sh->nbuckets = h->nbuckets = nbuckets;
315 : h->log2_nbuckets = max_log2 (nbuckets);
316 :
317 : alloc_arena (h) = (u64) (uword) mmap_addr;
318 : alloc_arena_next (h) = CLIB_CACHE_LINE_BYTES;
319 : alloc_arena_size (h) = memory_size;
320 :
321 : bucket_size = nbuckets * sizeof (h->buckets[0]);
322 : h->buckets = BV (alloc_aligned) (h, bucket_size);
323 : clib_memset_u8 (h->buckets, 0, bucket_size);
324 : h->sh->buckets_as_u64 = (u64) BV (clib_bihash_get_offset) (h, h->buckets);
325 :
326 : h->alloc_lock = BV (alloc_aligned) (h, CLIB_CACHE_LINE_BYTES);
327 : h->alloc_lock[0] = 0;
328 :
329 : h->sh->alloc_lock_as_u64 =
330 : (u64) BV (clib_bihash_get_offset) (h, (void *) h->alloc_lock);
331 : freelist_vh =
332 : BV (alloc_aligned) (h,
333 : sizeof (vec_header_t) +
334 : BIHASH_FREELIST_LENGTH * sizeof (u64));
335 : freelist_vh->len = BIHASH_FREELIST_LENGTH;
336 : h->sh->freelists_as_u64 =
337 : (u64) BV (clib_bihash_get_offset) (h, freelist_vh->vector_data);
338 : h->freelists = (void *) (freelist_vh->vector_data);
339 :
340 : h->fmt_fn = BV (format_bihash);
341 : h->kvp_fmt_fn = NULL;
342 : h->instantiated = 1;
343 : }
344 :
345 : void BV (clib_bihash_responder_init_svm)
346 : (BVT (clib_bihash) * h, char *name, int fd)
347 : {
348 : u8 *mmap_addr;
349 : u64 memory_size;
350 : BVT (clib_bihash_shared_header) * sh;
351 :
352 : ASSERT (BIHASH_USE_HEAP == 0);
353 :
354 : /* Trial mapping, to learn the segment size */
355 : mmap_addr = mmap (0, 4096, PROT_READ, MAP_SHARED, fd, 0 /* offset */ );
356 : if (mmap_addr == MAP_FAILED)
357 : {
358 : clib_unix_warning ("trial mmap failed");
359 : ASSERT (0);
360 : }
361 :
362 : sh = (BVT (clib_bihash_shared_header) *) mmap_addr;
363 :
364 : memory_size = sh->alloc_arena_size;
365 :
366 : munmap (mmap_addr, 4096);
367 :
368 : /* Actual mapping, at the required size */
369 : mmap_addr = mmap (0, memory_size,
370 : PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 /* offset */ );
371 :
372 : if (mmap_addr == MAP_FAILED)
373 : {
374 : clib_unix_warning ("mmap failed");
375 : ASSERT (0);
376 : }
377 :
378 : (void) close (fd);
379 :
380 : h->sh = (void *) mmap_addr;
381 : alloc_arena (h) = (u64) (uword) mmap_addr;
382 : h->memfd = -1;
383 :
384 : h->name = (u8 *) name;
385 : h->buckets = BV (clib_bihash_get_value) (h, h->sh->buckets_as_u64);
386 : h->nbuckets = h->sh->nbuckets;
387 : h->log2_nbuckets = max_log2 (h->nbuckets);
388 :
389 : h->alloc_lock = BV (clib_bihash_get_value) (h, h->sh->alloc_lock_as_u64);
390 : h->freelists = BV (clib_bihash_get_value) (h, h->sh->freelists_as_u64);
391 : h->fmt_fn = BV (format_bihash);
392 : h->kvp_fmt_fn = NULL;
393 : }
394 : #endif /* BIHASH_32_64_SVM */
395 :
396 1637 : void BV (clib_bihash_set_kvp_format_fn) (BVT (clib_bihash) * h,
397 : format_function_t * kvp_fmt_fn)
398 : {
399 1637 : h->kvp_fmt_fn = kvp_fmt_fn;
400 1637 : }
401 :
402 257 : int BV (clib_bihash_is_initialised) (const BVT (clib_bihash) * h)
403 : {
404 257 : return (h->instantiated != 0);
405 : }
406 :
407 625 : void BV (clib_bihash_free) (BVT (clib_bihash) * h)
408 : {
409 : int i;
410 :
411 625 : if (PREDICT_FALSE (h->instantiated == 0))
412 22 : goto never_initialized;
413 :
414 603 : h->instantiated = 0;
415 :
416 : if (BIHASH_USE_HEAP)
417 : {
418 : BVT (clib_bihash_alloc_chunk) * next, *chunk;
419 603 : void *oldheap = clib_mem_set_heap (h->heap);
420 :
421 603 : chunk = h->chunks;
422 1314 : while (chunk)
423 : {
424 711 : next = chunk->next;
425 711 : clib_mem_free (chunk);
426 711 : chunk = next;
427 : }
428 603 : clib_mem_set_heap (oldheap);
429 : }
430 :
431 603 : vec_free (h->working_copies);
432 603 : vec_free (h->working_copy_lengths);
433 603 : clib_mem_free ((void *) h->alloc_lock);
434 : #if BIHASH_32_64_SVM == 0
435 603 : vec_free (h->freelists);
436 : #else
437 : if (h->memfd > 0)
438 : (void) close (h->memfd);
439 : #endif
440 : if (BIHASH_USE_HEAP == 0)
441 : clib_mem_vm_free ((void *) (uword) (alloc_arena (h)),
442 : alloc_arena_size (h));
443 603 : never_initialized:
444 625 : if (h->dont_add_to_all_bihash_list)
445 : {
446 12 : clib_memset_u8 (h, 0, sizeof (*h));
447 12 : return;
448 : }
449 613 : clib_memset_u8 (h, 0, sizeof (*h));
450 18588 : for (i = 0; i < vec_len (clib_all_bihashes); i++)
451 : {
452 18588 : if ((void *) h == clib_all_bihashes[i])
453 : {
454 613 : vec_delete (clib_all_bihashes, 1, i);
455 613 : return;
456 : }
457 : }
458 0 : clib_warning ("Couldn't find hash table %llx on clib_all_bihashes...",
459 : (u64) (uword) h);
460 : }
461 :
462 : static
463 : BVT (clib_bihash_value) *
464 1096630 : BV (value_alloc) (BVT (clib_bihash) * h, u32 log2_pages)
465 : {
466 : int i;
467 1096630 : BVT (clib_bihash_value) * rv = 0;
468 :
469 1096630 : ASSERT (h->alloc_lock[0]);
470 :
471 : #if BIHASH_32_64_SVM
472 : ASSERT (log2_pages < vec_len (h->freelists));
473 : #endif
474 :
475 1096630 : if (log2_pages >= vec_len (h->freelists) || h->freelists[log2_pages] == 0)
476 : {
477 133520 : vec_validate_init_empty (h->freelists, log2_pages, 0);
478 131660 : rv = BV (alloc_aligned) (h, (sizeof (*rv) * (1 << log2_pages)));
479 131660 : goto initialize;
480 : }
481 964973 : rv = BV (clib_bihash_get_value) (h, (uword) h->freelists[log2_pages]);
482 964973 : h->freelists[log2_pages] = rv->next_free_as_u64;
483 :
484 1096630 : initialize:
485 1096630 : ASSERT (rv);
486 :
487 : BVT (clib_bihash_kv) * v;
488 1096630 : v = (BVT (clib_bihash_kv) *) rv;
489 :
490 5935432 : for (i = 0; i < BIHASH_KVP_PER_PAGE * (1 << log2_pages); i++)
491 : {
492 4838802 : BV (clib_bihash_mark_free) (v);
493 4838802 : v++;
494 : }
495 1096630 : return rv;
496 : }
497 :
498 : static void
499 1076862 : BV (value_free) (BVT (clib_bihash) * h, BVT (clib_bihash_value) * v,
500 : u32 log2_pages)
501 : {
502 1076862 : ASSERT (h->alloc_lock[0]);
503 :
504 1076862 : ASSERT (vec_len (h->freelists) > log2_pages);
505 :
506 1076862 : if (BIHASH_USE_HEAP && log2_pages >= BIIHASH_MIN_ALLOC_LOG2_PAGES)
507 : {
508 : /* allocations bigger or equal to chunk size always contain single
509 : * alloc and they can be given back to heap */
510 : void *oldheap;
511 : BVT (clib_bihash_alloc_chunk) * c;
512 0 : c = (BVT (clib_bihash_alloc_chunk) *) v - 1;
513 :
514 0 : if (c->prev)
515 0 : c->prev->next = c->next;
516 : else
517 0 : h->chunks = c->next;
518 :
519 0 : if (c->next)
520 0 : c->next->prev = c->prev;
521 :
522 0 : oldheap = clib_mem_set_heap (h->heap);
523 0 : clib_mem_free (c);
524 0 : clib_mem_set_heap (oldheap);
525 0 : return;
526 : }
527 :
528 : if (CLIB_DEBUG > 0)
529 1076862 : clib_memset_u8 (v, 0xFE, sizeof (*v) * (1 << log2_pages));
530 :
531 1076862 : v->next_free_as_u64 = (u64) h->freelists[log2_pages];
532 1076862 : h->freelists[log2_pages] = (u64) BV (clib_bihash_get_offset) (h, v);
533 : }
534 :
535 : static inline void
536 73020 : BV (make_working_copy) (BVT (clib_bihash) * h, BVT (clib_bihash_bucket) * b)
537 : {
538 : BVT (clib_bihash_value) * v;
539 : BVT (clib_bihash_bucket) working_bucket __attribute__ ((aligned (8)));
540 : BVT (clib_bihash_value) * working_copy;
541 73020 : u32 thread_index = os_get_thread_index ();
542 : int log2_working_copy_length;
543 :
544 73020 : ASSERT (h->alloc_lock[0]);
545 :
546 73020 : if (thread_index >= vec_len (h->working_copies))
547 : {
548 4 : vec_validate (h->working_copies, thread_index);
549 8 : vec_validate_init_empty (h->working_copy_lengths, thread_index, ~0);
550 : }
551 :
552 : /*
553 : * working_copies are per-cpu so that near-simultaneous
554 : * updates from multiple threads will not result in sporadic, spurious
555 : * lookup failures.
556 : */
557 73020 : working_copy = h->working_copies[thread_index];
558 73020 : log2_working_copy_length = h->working_copy_lengths[thread_index];
559 :
560 73020 : h->saved_bucket.as_u64 = b->as_u64;
561 :
562 73020 : if (b->log2_pages > log2_working_copy_length)
563 : {
564 : /*
565 : * It's not worth the bookkeeping to free working copies
566 : * if (working_copy)
567 : * clib_mem_free (working_copy);
568 : */
569 8 : working_copy = BV (alloc_aligned)
570 8 : (h, sizeof (working_copy[0]) * (1 << b->log2_pages));
571 8 : h->working_copy_lengths[thread_index] = b->log2_pages;
572 8 : h->working_copies[thread_index] = working_copy;
573 :
574 8 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_working_copy_lost,
575 8 : 1ULL << b->log2_pages);
576 : }
577 :
578 73020 : v = BV (clib_bihash_get_value) (h, b->offset);
579 :
580 73020 : clib_memcpy_fast (working_copy, v, sizeof (*v) * (1 << b->log2_pages));
581 73020 : working_bucket.as_u64 = b->as_u64;
582 73020 : working_bucket.offset = BV (clib_bihash_get_offset) (h, working_copy);
583 73020 : CLIB_MEMORY_STORE_BARRIER ();
584 73020 : b->as_u64 = working_bucket.as_u64;
585 73020 : h->working_copies[thread_index] = working_copy;
586 73020 : }
587 :
588 : static
589 : BVT (clib_bihash_value) *
590 77668 : BV (split_and_rehash)
591 : (BVT (clib_bihash) * h,
592 : BVT (clib_bihash_value) * old_values, u32 old_log2_pages,
593 : u32 new_log2_pages)
594 : {
595 : BVT (clib_bihash_value) * new_values, *new_v;
596 : int i, j, length_in_kvs;
597 :
598 77668 : ASSERT (h->alloc_lock[0]);
599 :
600 77668 : new_values = BV (value_alloc) (h, new_log2_pages);
601 77668 : length_in_kvs = (1 << old_log2_pages) * BIHASH_KVP_PER_PAGE;
602 :
603 436782 : for (i = 0; i < length_in_kvs; i++)
604 : {
605 : u64 new_hash;
606 :
607 : /* Entry not in use? Forget it */
608 359121 : if (BV (clib_bihash_is_free) (&(old_values->kvp[i])))
609 30075 : continue;
610 :
611 : /* rehash the item onto its new home-page */
612 329046 : new_hash = BV (clib_bihash_hash) (&(old_values->kvp[i]));
613 329046 : new_hash = extract_bits (new_hash, h->log2_nbuckets, new_log2_pages);
614 329046 : new_v = &new_values[new_hash];
615 :
616 : /* Across the new home-page */
617 567181 : for (j = 0; j < BIHASH_KVP_PER_PAGE; j++)
618 : {
619 : /* Empty slot */
620 567174 : if (BV (clib_bihash_is_free) (&(new_v->kvp[j])))
621 : {
622 329039 : clib_memcpy_fast (&(new_v->kvp[j]), &(old_values->kvp[i]),
623 : sizeof (new_v->kvp[j]));
624 329039 : goto doublebreak;
625 : }
626 : }
627 : /* Crap. Tell caller to try again */
628 7 : BV (value_free) (h, new_values, new_log2_pages);
629 7 : return 0;
630 359114 : doublebreak:;
631 : }
632 :
633 77661 : return new_values;
634 : }
635 :
636 : static
637 : BVT (clib_bihash_value) *
638 302 : BV (split_and_rehash_linear)
639 : (BVT (clib_bihash) * h,
640 : BVT (clib_bihash_value) * old_values, u32 old_log2_pages,
641 : u32 new_log2_pages)
642 : {
643 : BVT (clib_bihash_value) * new_values;
644 : int i, j, new_length, old_length;
645 :
646 302 : ASSERT (h->alloc_lock[0]);
647 :
648 302 : new_values = BV (value_alloc) (h, new_log2_pages);
649 302 : new_length = (1 << new_log2_pages) * BIHASH_KVP_PER_PAGE;
650 302 : old_length = (1 << old_log2_pages) * BIHASH_KVP_PER_PAGE;
651 :
652 302 : j = 0;
653 : /* Across the old value array */
654 1694 : for (i = 0; i < old_length; i++)
655 : {
656 : /* Find a free slot in the new linear scan bucket */
657 1392 : for (; j < new_length; j++)
658 : {
659 : /* Old value not in use? Forget it. */
660 1392 : if (BV (clib_bihash_is_free) (&(old_values->kvp[i])))
661 113 : goto doublebreak;
662 :
663 : /* New value should never be in use */
664 1279 : if (BV (clib_bihash_is_free) (&(new_values->kvp[j])))
665 : {
666 : /* Copy the old value and move along */
667 1279 : clib_memcpy_fast (&(new_values->kvp[j]), &(old_values->kvp[i]),
668 : sizeof (new_values->kvp[j]));
669 1279 : j++;
670 1279 : goto doublebreak;
671 : }
672 : }
673 : /* This should never happen... */
674 0 : clib_warning ("BUG: linear rehash failed!");
675 0 : BV (value_free) (h, new_values, new_log2_pages);
676 0 : return 0;
677 :
678 1392 : doublebreak:;
679 : }
680 302 : return new_values;
681 : }
682 :
683 6473737 : static_always_inline int BV (clib_bihash_add_del_inline_with_hash) (
684 : BVT (clib_bihash) * h, BVT (clib_bihash_kv) * add_v, u64 hash, int is_add,
685 : int (*is_stale_cb) (BVT (clib_bihash_kv) *, void *), void *is_stale_arg,
686 : void (*overwrite_cb) (BVT (clib_bihash_kv) *, void *), void *overwrite_arg)
687 : {
688 : BVT (clib_bihash_bucket) * b, tmp_b;
689 : BVT (clib_bihash_value) * v, *new_v, *save_new_v, *working_copy;
690 : int i, limit;
691 : u64 new_hash;
692 : u32 new_log2_pages, old_log2_pages;
693 6473737 : u32 thread_index = os_get_thread_index ();
694 : int mark_bucket_linear;
695 : int resplit_once;
696 :
697 : /* *INDENT-OFF* */
698 : static const BVT (clib_bihash_bucket) mask = {
699 : .linear_search = 1,
700 : .log2_pages = -1
701 : };
702 : /* *INDENT-ON* */
703 :
704 : #if BIHASH_LAZY_INSTANTIATE
705 : /*
706 : * Create the table (is_add=1,2), or flunk the request now (is_add=0)
707 : * Use the alloc_lock to protect the instantiate operation.
708 : */
709 6208736 : if (PREDICT_FALSE (h->instantiated == 0))
710 : {
711 1850 : if (is_add == 0)
712 4 : return (-1);
713 :
714 1846 : BV (clib_bihash_alloc_lock) (h);
715 1846 : if (h->instantiated == 0)
716 1844 : BV (clib_bihash_instantiate) (h);
717 1846 : BV (clib_bihash_alloc_unlock) (h);
718 : }
719 : #else
720 : /* Debug image: make sure the table has been instantiated */
721 264999 : ASSERT (h->instantiated != 0);
722 : #endif
723 :
724 : /*
725 : * Debug image: make sure that an item being added doesn't accidentally
726 : * look like a free item.
727 : */
728 6473731 : ASSERT ((is_add && BV (clib_bihash_is_free) (add_v)) == 0);
729 :
730 6473730 : b = BV (clib_bihash_get_bucket) (h, hash);
731 :
732 6473730 : BV (clib_bihash_lock_bucket) (b);
733 :
734 : /* First elt in the bucket? */
735 6208072 : if (BIHASH_KVP_AT_BUCKET_LEVEL == 0 && BV (clib_bihash_bucket_is_empty) (b))
736 : {
737 1022762 : if (is_add == 0)
738 : {
739 4102 : BV (clib_bihash_unlock_bucket) (b);
740 4102 : return (-1);
741 : }
742 :
743 1018660 : BV (clib_bihash_alloc_lock) (h);
744 1018663 : v = BV (value_alloc) (h, 0);
745 1018663 : BV (clib_bihash_alloc_unlock) (h);
746 :
747 1018663 : *v->kvp = *add_v;
748 1018663 : tmp_b.as_u64 = 0; /* clears bucket lock */
749 1018663 : tmp_b.offset = BV (clib_bihash_get_offset) (h, v);
750 1018663 : tmp_b.refcnt = 1;
751 1018663 : CLIB_MEMORY_STORE_BARRIER ();
752 :
753 1018663 : b->as_u64 = tmp_b.as_u64; /* unlocks the bucket */
754 1018663 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_alloc_add, 1);
755 :
756 1018663 : return (0);
757 : }
758 :
759 : /* WARNING: we're still looking at the live copy... */
760 5450984 : limit = BIHASH_KVP_PER_PAGE;
761 5450984 : v = BV (clib_bihash_get_value) (h, b->offset);
762 :
763 5450981 : if (PREDICT_FALSE (b->as_u64 & mask.as_u64))
764 : {
765 411866 : if (PREDICT_FALSE (b->linear_search))
766 2006 : limit <<= b->log2_pages;
767 : else
768 409860 : v += extract_bits (hash, h->log2_nbuckets, b->log2_pages);
769 : }
770 :
771 5450981 : if (is_add)
772 : {
773 : /*
774 : * Because reader threads are looking at live data,
775 : * we have to be extra careful. Readers do NOT hold the
776 : * bucket lock. We need to be SLOWER than a search, past the
777 : * point where readers CHECK the bucket lock.
778 : */
779 :
780 : /*
781 : * For obvious (in hindsight) reasons, see if we're supposed to
782 : * replace an existing key, then look for an empty slot.
783 : */
784 10968423 : for (i = 0; i < limit; i++)
785 : {
786 8812564 : if (BV (clib_bihash_is_free) (&(v->kvp[i])))
787 4944917 : continue;
788 3867644 : if (BV (clib_bihash_key_compare) (v->kvp[i].key, add_v->key))
789 : {
790 : /* Add but do not overwrite? */
791 85434 : if (is_add == 2)
792 : {
793 14792 : BV (clib_bihash_unlock_bucket) (b);
794 14792 : return (-2);
795 : }
796 70642 : if (overwrite_cb)
797 0 : overwrite_cb (&(v->kvp[i]), overwrite_arg);
798 70642 : clib_memcpy_fast (&(v->kvp[i].value),
799 70642 : &add_v->value, sizeof (add_v->value));
800 70642 : BV (clib_bihash_unlock_bucket) (b);
801 70642 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_replace, 1);
802 70642 : return (0);
803 : }
804 : }
805 : /*
806 : * Look for an empty slot. If found, use it
807 : */
808 5496716 : for (i = 0; i < limit; i++)
809 : {
810 5423688 : if (BV (clib_bihash_is_free) (&(v->kvp[i])))
811 : {
812 : /*
813 : * Copy the value first, so that if a reader manages
814 : * to match the new key, the value will be right...
815 : */
816 2082830 : clib_memcpy_fast (&(v->kvp[i].value),
817 2082830 : &add_v->value, sizeof (add_v->value));
818 2082832 : CLIB_MEMORY_STORE_BARRIER (); /* Make sure the value has settled */
819 2082832 : clib_memcpy_fast (&(v->kvp[i]), &add_v->key,
820 : sizeof (add_v->key));
821 2082832 : b->refcnt++;
822 2082832 : ASSERT (b->refcnt > 0);
823 2082832 : BV (clib_bihash_unlock_bucket) (b);
824 2082831 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_add, 1);
825 2082832 : return (0);
826 : }
827 : }
828 : /* look for stale data to overwrite */
829 73029 : if (is_stale_cb)
830 : {
831 56 : for (i = 0; i < limit; i++)
832 : {
833 49 : if (is_stale_cb (&(v->kvp[i]), is_stale_arg))
834 : {
835 0 : clib_memcpy_fast (&(v->kvp[i]), add_v, sizeof (*add_v));
836 0 : CLIB_MEMORY_STORE_BARRIER ();
837 0 : BV (clib_bihash_unlock_bucket) (b);
838 0 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_replace, 1);
839 0 : return (0);
840 : }
841 : }
842 : }
843 : /* Out of space in this bucket, split the bucket... */
844 : }
845 : else /* delete case */
846 : {
847 6385801 : for (i = 0; i < limit; i++)
848 : {
849 : /* no sense even looking at this one */
850 6328866 : if (BV (clib_bihash_is_free) (&(v->kvp[i])))
851 2725094 : continue;
852 : /* Found the key? Kill it... */
853 3603772 : if (BV (clib_bihash_key_compare) (v->kvp[i].key, add_v->key))
854 : {
855 3152751 : BV (clib_bihash_mark_free) (&(v->kvp[i]));
856 : /* Is the bucket empty? */
857 3152751 : if (PREDICT_TRUE (b->refcnt > 1))
858 : {
859 2153858 : b->refcnt--;
860 : /* Switch back to the bucket-level kvp array? */
861 95506 : if (BIHASH_KVP_AT_BUCKET_LEVEL && b->refcnt == 1
862 68684 : && b->log2_pages > 0)
863 : {
864 19 : tmp_b.as_u64 = b->as_u64;
865 38 : b->offset = BV (clib_bihash_get_offset)
866 19 : (h, (void *) (b + 1));
867 19 : b->linear_search = 0;
868 19 : b->log2_pages = 0;
869 : /* Clean up the bucket-level kvp array */
870 19 : BVT (clib_bihash_kv) *v = (void *) (b + 1);
871 : int j;
872 108 : for (j = 0; j < BIHASH_KVP_PER_PAGE; j++)
873 : {
874 89 : BV (clib_bihash_mark_free) (v);
875 89 : v++;
876 : }
877 19 : CLIB_MEMORY_STORE_BARRIER ();
878 19 : BV (clib_bihash_unlock_bucket) (b);
879 19 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_del, 1);
880 19 : goto free_backing_store;
881 : }
882 :
883 2153839 : CLIB_MEMORY_STORE_BARRIER ();
884 2098329 : BV (clib_bihash_unlock_bucket) (b);
885 2153839 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_del, 1);
886 2153839 : return (0);
887 : }
888 : else /* yes, free it */
889 : {
890 : /* Save old bucket value, need log2_pages to free it */
891 998894 : tmp_b.as_u64 = b->as_u64;
892 :
893 : /* Kill and unlock the bucket */
894 998894 : b->as_u64 = 0;
895 :
896 998913 : free_backing_store:
897 : /* And free the backing storage */
898 998913 : BV (clib_bihash_alloc_lock) (h);
899 : /* Note: v currently points into the middle of the bucket */
900 998913 : v = BV (clib_bihash_get_value) (h, tmp_b.offset);
901 998913 : BV (value_free) (h, v, tmp_b.log2_pages);
902 998913 : BV (clib_bihash_alloc_unlock) (h);
903 998913 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_del_free,
904 : 1);
905 998913 : return (0);
906 : }
907 : }
908 : }
909 : /* Not found... */
910 56935 : BV (clib_bihash_unlock_bucket) (b);
911 56935 : return (-3);
912 : }
913 :
914 : /* Move readers to a (locked) temp copy of the bucket */
915 73029 : BV (clib_bihash_alloc_lock) (h);
916 73020 : BV (make_working_copy) (h, b);
917 :
918 73020 : v = BV (clib_bihash_get_value) (h, h->saved_bucket.offset);
919 :
920 73020 : old_log2_pages = h->saved_bucket.log2_pages;
921 73020 : new_log2_pages = old_log2_pages + 1;
922 73020 : mark_bucket_linear = 0;
923 73020 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_split_add, 1);
924 73020 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_splits, old_log2_pages);
925 :
926 73020 : working_copy = h->working_copies[thread_index];
927 73020 : resplit_once = 0;
928 73020 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_splits, 1);
929 :
930 73020 : new_v = BV (split_and_rehash) (h, working_copy, old_log2_pages,
931 : new_log2_pages);
932 73020 : if (new_v == 0)
933 : {
934 5 : try_resplit:
935 4648 : resplit_once = 1;
936 4648 : new_log2_pages++;
937 : /* Try re-splitting. If that fails, fall back to linear search */
938 4648 : new_v = BV (split_and_rehash) (h, working_copy, old_log2_pages,
939 : new_log2_pages);
940 4648 : if (new_v == 0)
941 : {
942 2 : mark_linear:
943 302 : new_log2_pages--;
944 : /* pinned collisions, use linear search */
945 : new_v =
946 302 : BV (split_and_rehash_linear) (h, working_copy, old_log2_pages,
947 : new_log2_pages);
948 302 : mark_bucket_linear = 1;
949 302 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_linear, 1);
950 : }
951 4948 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_resplit, 1);
952 4948 : BV (clib_bihash_increment_stat) (h, BIHASH_STAT_splits,
953 4948 : old_log2_pages + 1);
954 : }
955 :
956 : /* Try to add the new entry */
957 77963 : save_new_v = new_v;
958 77963 : new_hash = BV (clib_bihash_hash) (add_v);
959 77963 : limit = BIHASH_KVP_PER_PAGE;
960 77963 : if (mark_bucket_linear)
961 302 : limit <<= new_log2_pages;
962 : else
963 77661 : new_v += extract_bits (new_hash, h->log2_nbuckets, new_log2_pages);
964 :
965 234692 : for (i = 0; i < limit; i++)
966 : {
967 229749 : if (BV (clib_bihash_is_free) (&(new_v->kvp[i])))
968 : {
969 73020 : clib_memcpy_fast (&(new_v->kvp[i]), add_v, sizeof (*add_v));
970 73020 : goto expand_ok;
971 : }
972 : }
973 :
974 : /* Crap. Try again */
975 4943 : BV (value_free) (h, save_new_v, new_log2_pages);
976 : /*
977 : * If we've already doubled the size of the bucket once,
978 : * fall back to linear search now.
979 : */
980 4943 : if (resplit_once)
981 300 : goto mark_linear;
982 : else
983 4643 : goto try_resplit;
984 :
985 73020 : expand_ok:
986 73020 : tmp_b.log2_pages = new_log2_pages;
987 73020 : tmp_b.offset = BV (clib_bihash_get_offset) (h, save_new_v);
988 73020 : tmp_b.linear_search = mark_bucket_linear;
989 : #if BIHASH_KVP_AT_BUCKET_LEVEL
990 : /* Compensate for permanent refcount bump at the bucket level */
991 19 : if (new_log2_pages > 0)
992 : #endif
993 73020 : tmp_b.refcnt = h->saved_bucket.refcnt + 1;
994 73020 : ASSERT (tmp_b.refcnt > 0);
995 73020 : tmp_b.lock = 0;
996 73020 : CLIB_MEMORY_STORE_BARRIER ();
997 73020 : b->as_u64 = tmp_b.as_u64;
998 :
999 : #if BIHASH_KVP_AT_BUCKET_LEVEL
1000 19 : if (h->saved_bucket.log2_pages > 0)
1001 : {
1002 : #endif
1003 :
1004 : /* free the old bucket, except at the bucket level if so configured */
1005 73001 : v = BV (clib_bihash_get_value) (h, h->saved_bucket.offset);
1006 73001 : BV (value_free) (h, v, h->saved_bucket.log2_pages);
1007 :
1008 : #if BIHASH_KVP_AT_BUCKET_LEVEL
1009 : }
1010 : #endif
1011 :
1012 :
1013 73020 : BV (clib_bihash_alloc_unlock) (h);
1014 73020 : return (0);
1015 : }
1016 :
1017 6473740 : static_always_inline int BV (clib_bihash_add_del_inline)
1018 : (BVT (clib_bihash) * h, BVT (clib_bihash_kv) * add_v, int is_add,
1019 : int (*is_stale_cb) (BVT (clib_bihash_kv) *, void *), void *arg)
1020 : {
1021 6473740 : u64 hash = BV (clib_bihash_hash) (add_v);
1022 6473738 : return BV (clib_bihash_add_del_inline_with_hash) (h, add_v, hash, is_add,
1023 : is_stale_cb, arg, 0, 0);
1024 : }
1025 :
1026 0 : int BV (clib_bihash_add_del_with_hash) (BVT (clib_bihash) * h,
1027 : BVT (clib_bihash_kv) * add_v, u64 hash,
1028 : int is_add)
1029 : {
1030 0 : return BV (clib_bihash_add_del_inline_with_hash) (h, add_v, hash, is_add, 0,
1031 : 0, 0, 0);
1032 : }
1033 :
1034 6452765 : int BV (clib_bihash_add_del)
1035 : (BVT (clib_bihash) * h, BVT (clib_bihash_kv) * add_v, int is_add)
1036 : {
1037 6452765 : return BV (clib_bihash_add_del_inline) (h, add_v, is_add, 0, 0);
1038 : }
1039 :
1040 20974 : int BV (clib_bihash_add_or_overwrite_stale)
1041 : (BVT (clib_bihash) * h, BVT (clib_bihash_kv) * add_v,
1042 : int (*stale_callback) (BVT (clib_bihash_kv) *, void *), void *arg)
1043 : {
1044 20974 : return BV (clib_bihash_add_del_inline) (h, add_v, 1, stale_callback, arg);
1045 : }
1046 :
1047 0 : int BV (clib_bihash_add_with_overwrite_cb) (
1048 : BVT (clib_bihash) * h, BVT (clib_bihash_kv) * add_v,
1049 : void (overwrite_cb) (BVT (clib_bihash_kv) *, void *), void *arg)
1050 : {
1051 0 : u64 hash = BV (clib_bihash_hash) (add_v);
1052 0 : return BV (clib_bihash_add_del_inline_with_hash) (h, add_v, hash, 1, 0, 0,
1053 : overwrite_cb, arg);
1054 : }
1055 :
1056 1608904 : int BV (clib_bihash_search)
1057 : (BVT (clib_bihash) * h,
1058 : BVT (clib_bihash_kv) * search_key, BVT (clib_bihash_kv) * valuep)
1059 : {
1060 1608904 : return BV (clib_bihash_search_inline_2) (h, search_key, valuep);
1061 : }
1062 :
1063 47568 : u8 *BV (format_bihash) (u8 * s, va_list * args)
1064 : {
1065 47568 : BVT (clib_bihash) * h = va_arg (*args, BVT (clib_bihash) *);
1066 47568 : int verbose = va_arg (*args, int);
1067 : BVT (clib_bihash_bucket) * b;
1068 : BVT (clib_bihash_value) * v;
1069 : int i, j, k;
1070 47568 : u64 active_elements = 0;
1071 47568 : u64 active_buckets = 0;
1072 47568 : u64 linear_buckets = 0;
1073 :
1074 47568 : s = format (s, "Hash table '%s'\n", h->name ? h->name : (u8 *) "(unnamed)");
1075 :
1076 : #if BIHASH_LAZY_INSTANTIATE
1077 30492 : if (PREDICT_FALSE (h->instantiated == 0))
1078 25176 : return format (s, " empty, uninitialized");
1079 : #endif
1080 :
1081 794113880 : for (i = 0; i < h->nbuckets; i++)
1082 : {
1083 794088768 : b = BV (clib_bihash_get_bucket) (h, i);
1084 794088768 : if (BV (clib_bihash_bucket_is_empty) (b))
1085 : {
1086 793878953 : if (verbose > 1)
1087 0 : s = format (s, "[%d]: empty\n", i);
1088 793878953 : continue;
1089 : }
1090 :
1091 209823 : active_buckets++;
1092 :
1093 209823 : if (b->linear_search)
1094 32 : linear_buckets++;
1095 :
1096 209823 : if (verbose)
1097 : {
1098 12931 : s = format
1099 : (s, "[%d]: heap offset %lld, len %d, refcnt %d, linear %d\n", i,
1100 12931 : b->offset, (1 << b->log2_pages), b->refcnt, b->linear_search);
1101 : }
1102 :
1103 209823 : v = BV (clib_bihash_get_value) (h, b->offset);
1104 429127 : for (j = 0; j < (1 << b->log2_pages); j++)
1105 : {
1106 1190263 : for (k = 0; k < BIHASH_KVP_PER_PAGE; k++)
1107 : {
1108 970959 : if (BV (clib_bihash_is_free) (&v->kvp[k]))
1109 : {
1110 650719 : if (verbose > 1)
1111 0 : s = format (s, " %d: empty\n",
1112 0 : j * BIHASH_KVP_PER_PAGE + k);
1113 650719 : continue;
1114 : }
1115 320240 : if (verbose)
1116 : {
1117 31699 : if (h->kvp_fmt_fn)
1118 : {
1119 31699 : s = format (s, " %d: %U\n",
1120 31699 : j * BIHASH_KVP_PER_PAGE + k,
1121 : h->kvp_fmt_fn, &(v->kvp[k]), verbose);
1122 : }
1123 : else
1124 : {
1125 0 : s = format (s, " %d: %U\n",
1126 0 : j * BIHASH_KVP_PER_PAGE + k,
1127 : BV (format_bihash_kvp), &(v->kvp[k]));
1128 : }
1129 : }
1130 320240 : active_elements++;
1131 : }
1132 219304 : v++;
1133 : }
1134 : }
1135 :
1136 22392 : s = format (s, " %lld active elements %lld active buckets\n",
1137 : active_elements, active_buckets);
1138 22392 : s = format (s, " %d free lists\n", vec_len (h->freelists));
1139 :
1140 27733 : for (i = 0; i < vec_len (h->freelists); i++)
1141 : {
1142 5341 : u32 nfree = 0;
1143 : BVT (clib_bihash_value) * free_elt;
1144 5341 : u64 free_elt_as_u64 = h->freelists[i];
1145 :
1146 88802 : while (free_elt_as_u64)
1147 : {
1148 83461 : free_elt = BV (clib_bihash_get_value) (h, free_elt_as_u64);
1149 83461 : nfree++;
1150 83461 : free_elt_as_u64 = free_elt->next_free_as_u64;
1151 : }
1152 :
1153 5341 : if (nfree || verbose)
1154 1515 : s = format (s, " [len %d] %u free elts\n", 1 << i, nfree);
1155 : }
1156 :
1157 22392 : s = format (s, " %lld linear search buckets\n", linear_buckets);
1158 : if (BIHASH_USE_HEAP)
1159 : {
1160 22392 : BVT (clib_bihash_alloc_chunk) * c = h->chunks;
1161 22392 : uword bytes_left = 0, total_size = 0, n_chunks = 0;
1162 :
1163 50000 : while (c)
1164 : {
1165 27608 : bytes_left += c->bytes_left;
1166 27608 : total_size += c->size;
1167 27608 : n_chunks += 1;
1168 27608 : c = c->next;
1169 : }
1170 22392 : s = format (s,
1171 : " heap: %u chunk(s) allocated\n"
1172 : " bytes: used %U, scrap %U\n", n_chunks,
1173 : format_memory_size, total_size,
1174 : format_memory_size, bytes_left);
1175 : }
1176 : else
1177 : {
1178 : u64 used_bytes = alloc_arena_next (h);
1179 : s = format (s,
1180 : " arena: base %llx, next %llx\n"
1181 : " used %lld b (%lld Mbytes) of %lld b (%lld Mbytes)\n",
1182 : alloc_arena (h), alloc_arena_next (h),
1183 : used_bytes, used_bytes >> 20,
1184 : alloc_arena_size (h), alloc_arena_size (h) >> 20);
1185 : }
1186 22392 : return s;
1187 : }
1188 :
1189 2192 : void BV (clib_bihash_foreach_key_value_pair)
1190 : (BVT (clib_bihash) * h,
1191 : BV (clib_bihash_foreach_key_value_pair_cb) cb, void *arg)
1192 : {
1193 : int i, j, k;
1194 : BVT (clib_bihash_bucket) * b;
1195 : BVT (clib_bihash_value) * v;
1196 :
1197 :
1198 : #if BIHASH_LAZY_INSTANTIATE
1199 1910 : if (PREDICT_FALSE (h->instantiated == 0))
1200 1 : return;
1201 : #endif
1202 :
1203 162676944 : for (i = 0; i < h->nbuckets; i++)
1204 : {
1205 162674792 : b = BV (clib_bihash_get_bucket) (h, i);
1206 162674792 : if (BV (clib_bihash_bucket_is_empty) (b))
1207 162607826 : continue;
1208 :
1209 66776 : v = BV (clib_bihash_get_value) (h, b->offset);
1210 133552 : for (j = 0; j < (1 << b->log2_pages); j++)
1211 : {
1212 352040 : for (k = 0; k < BIHASH_KVP_PER_PAGE; k++)
1213 : {
1214 285264 : if (BV (clib_bihash_is_free) (&v->kvp[k]))
1215 218485 : continue;
1216 :
1217 66779 : if (BIHASH_WALK_STOP == cb (&v->kvp[k], arg))
1218 0 : return;
1219 : /*
1220 : * In case the callback deletes the last entry in the bucket...
1221 : */
1222 66779 : if (BV (clib_bihash_bucket_is_empty) (b))
1223 0 : goto doublebreak;
1224 : }
1225 66776 : v++;
1226 : }
1227 162674792 : doublebreak:
1228 : ;
1229 : }
1230 : }
1231 :
1232 : /** @endcond */
1233 :
1234 : /*
1235 : * fd.io coding-style-patch-verification: ON
1236 : *
1237 : * Local Variables:
1238 : * eval: (c-set-style "gnu")
1239 : * End:
1240 : */
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