1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation.
3 * Copyright(c) 2016 6WIND S.A.
14 #include <sys/queue.h>
17 #include <rte_common.h>
19 #include <rte_debug.h>
20 #include <rte_memory.h>
21 #include <rte_memzone.h>
22 #include <rte_malloc.h>
23 #include <rte_atomic.h>
24 #include <rte_launch.h>
26 #include <rte_eal_memconfig.h>
27 #include <rte_per_lcore.h>
28 #include <rte_lcore.h>
29 #include <rte_branch_prediction.h>
30 #include <rte_errno.h>
31 #include <rte_string_fns.h>
32 #include <rte_spinlock.h>
34 #include "rte_mempool.h"
36 TAILQ_HEAD(rte_mempool_list, rte_tailq_entry);
38 static struct rte_tailq_elem rte_mempool_tailq = {
39 .name = "RTE_MEMPOOL",
41 EAL_REGISTER_TAILQ(rte_mempool_tailq)
43 #define CACHE_FLUSHTHRESH_MULTIPLIER 1.5
44 #define CALC_CACHE_FLUSHTHRESH(c) \
45 ((typeof(c))((c) * CACHE_FLUSHTHRESH_MULTIPLIER))
48 * return the greatest common divisor between a and b (fast algorithm)
51 static unsigned get_gcd(unsigned a, unsigned b)
76 * Depending on memory configuration, objects addresses are spread
77 * between channels and ranks in RAM: the pool allocator will add
78 * padding between objects. This function return the new size of the
81 static unsigned optimize_object_size(unsigned obj_size)
83 unsigned nrank, nchan;
84 unsigned new_obj_size;
86 /* get number of channels */
87 nchan = rte_memory_get_nchannel();
91 nrank = rte_memory_get_nrank();
95 /* process new object size */
96 new_obj_size = (obj_size + RTE_MEMPOOL_ALIGN_MASK) / RTE_MEMPOOL_ALIGN;
97 while (get_gcd(new_obj_size, nrank * nchan) != 1)
99 return new_obj_size * RTE_MEMPOOL_ALIGN;
102 struct pagesz_walk_arg {
108 find_min_pagesz(const struct rte_memseg_list *msl, void *arg)
110 struct pagesz_walk_arg *wa = arg;
114 * we need to only look at page sizes available for a particular socket
115 * ID. so, we either need an exact match on socket ID (can match both
116 * native and external memory), or, if SOCKET_ID_ANY was specified as a
117 * socket ID argument, we must only look at native memory and ignore any
118 * page sizes associated with external memory.
120 valid = msl->socket_id == wa->socket_id;
121 valid |= wa->socket_id == SOCKET_ID_ANY && msl->external == 0;
123 if (valid && msl->page_sz < wa->min)
124 wa->min = msl->page_sz;
130 get_min_page_size(int socket_id)
132 struct pagesz_walk_arg wa;
135 wa.socket_id = socket_id;
137 rte_memseg_list_walk(find_min_pagesz, &wa);
139 return wa.min == SIZE_MAX ? (size_t) getpagesize() : wa.min;
144 mempool_add_elem(struct rte_mempool *mp, __rte_unused void *opaque,
145 void *obj, rte_iova_t iova)
147 struct rte_mempool_objhdr *hdr;
148 struct rte_mempool_objtlr *tlr __rte_unused;
150 /* set mempool ptr in header */
151 hdr = RTE_PTR_SUB(obj, sizeof(*hdr));
154 STAILQ_INSERT_TAIL(&mp->elt_list, hdr, next);
155 mp->populated_size++;
157 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
158 hdr->cookie = RTE_MEMPOOL_HEADER_COOKIE2;
159 tlr = __mempool_get_trailer(obj);
160 tlr->cookie = RTE_MEMPOOL_TRAILER_COOKIE;
164 /* call obj_cb() for each mempool element */
166 rte_mempool_obj_iter(struct rte_mempool *mp,
167 rte_mempool_obj_cb_t *obj_cb, void *obj_cb_arg)
169 struct rte_mempool_objhdr *hdr;
173 STAILQ_FOREACH(hdr, &mp->elt_list, next) {
174 obj = (char *)hdr + sizeof(*hdr);
175 obj_cb(mp, obj_cb_arg, obj, n);
182 /* call mem_cb() for each mempool memory chunk */
184 rte_mempool_mem_iter(struct rte_mempool *mp,
185 rte_mempool_mem_cb_t *mem_cb, void *mem_cb_arg)
187 struct rte_mempool_memhdr *hdr;
190 STAILQ_FOREACH(hdr, &mp->mem_list, next) {
191 mem_cb(mp, mem_cb_arg, hdr, n);
198 /* get the header, trailer and total size of a mempool element. */
200 rte_mempool_calc_obj_size(uint32_t elt_size, uint32_t flags,
201 struct rte_mempool_objsz *sz)
203 struct rte_mempool_objsz lsz;
205 sz = (sz != NULL) ? sz : &lsz;
207 sz->header_size = sizeof(struct rte_mempool_objhdr);
208 if ((flags & MEMPOOL_F_NO_CACHE_ALIGN) == 0)
209 sz->header_size = RTE_ALIGN_CEIL(sz->header_size,
212 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
213 sz->trailer_size = sizeof(struct rte_mempool_objtlr);
215 sz->trailer_size = 0;
218 /* element size is 8 bytes-aligned at least */
219 sz->elt_size = RTE_ALIGN_CEIL(elt_size, sizeof(uint64_t));
221 /* expand trailer to next cache line */
222 if ((flags & MEMPOOL_F_NO_CACHE_ALIGN) == 0) {
223 sz->total_size = sz->header_size + sz->elt_size +
225 sz->trailer_size += ((RTE_MEMPOOL_ALIGN -
226 (sz->total_size & RTE_MEMPOOL_ALIGN_MASK)) &
227 RTE_MEMPOOL_ALIGN_MASK);
231 * increase trailer to add padding between objects in order to
232 * spread them across memory channels/ranks
234 if ((flags & MEMPOOL_F_NO_SPREAD) == 0) {
236 new_size = optimize_object_size(sz->header_size + sz->elt_size +
238 sz->trailer_size = new_size - sz->header_size - sz->elt_size;
241 /* this is the size of an object, including header and trailer */
242 sz->total_size = sz->header_size + sz->elt_size + sz->trailer_size;
244 return sz->total_size;
247 /* free a memchunk allocated with rte_memzone_reserve() */
249 rte_mempool_memchunk_mz_free(__rte_unused struct rte_mempool_memhdr *memhdr,
252 const struct rte_memzone *mz = opaque;
253 rte_memzone_free(mz);
256 /* Free memory chunks used by a mempool. Objects must be in pool */
258 rte_mempool_free_memchunks(struct rte_mempool *mp)
260 struct rte_mempool_memhdr *memhdr;
263 while (!STAILQ_EMPTY(&mp->elt_list)) {
264 rte_mempool_ops_dequeue_bulk(mp, &elt, 1);
266 STAILQ_REMOVE_HEAD(&mp->elt_list, next);
267 mp->populated_size--;
270 while (!STAILQ_EMPTY(&mp->mem_list)) {
271 memhdr = STAILQ_FIRST(&mp->mem_list);
272 STAILQ_REMOVE_HEAD(&mp->mem_list, next);
273 if (memhdr->free_cb != NULL)
274 memhdr->free_cb(memhdr, memhdr->opaque);
281 mempool_ops_alloc_once(struct rte_mempool *mp)
285 /* create the internal ring if not already done */
286 if ((mp->flags & MEMPOOL_F_POOL_CREATED) == 0) {
287 ret = rte_mempool_ops_alloc(mp);
290 mp->flags |= MEMPOOL_F_POOL_CREATED;
295 /* Add objects in the pool, using a physically contiguous memory
296 * zone. Return the number of objects added, or a negative value
300 rte_mempool_populate_iova(struct rte_mempool *mp, char *vaddr,
301 rte_iova_t iova, size_t len, rte_mempool_memchunk_free_cb_t *free_cb,
306 struct rte_mempool_memhdr *memhdr;
309 ret = mempool_ops_alloc_once(mp);
313 /* mempool is already populated */
314 if (mp->populated_size >= mp->size)
317 memhdr = rte_zmalloc("MEMPOOL_MEMHDR", sizeof(*memhdr), 0);
322 memhdr->addr = vaddr;
325 memhdr->free_cb = free_cb;
326 memhdr->opaque = opaque;
328 if (mp->flags & MEMPOOL_F_NO_CACHE_ALIGN)
329 off = RTE_PTR_ALIGN_CEIL(vaddr, 8) - vaddr;
331 off = RTE_PTR_ALIGN_CEIL(vaddr, RTE_CACHE_LINE_SIZE) - vaddr;
338 i = rte_mempool_ops_populate(mp, mp->size - mp->populated_size,
340 (iova == RTE_BAD_IOVA) ? RTE_BAD_IOVA : (iova + off),
341 len - off, mempool_add_elem, NULL);
343 /* not enough room to store one object */
349 STAILQ_INSERT_TAIL(&mp->mem_list, memhdr, next);
358 /* Populate the mempool with a virtual area. Return the number of
359 * objects added, or a negative value on error.
362 rte_mempool_populate_virt(struct rte_mempool *mp, char *addr,
363 size_t len, size_t pg_sz, rte_mempool_memchunk_free_cb_t *free_cb,
367 size_t off, phys_len;
370 /* address and len must be page-aligned */
371 if (RTE_PTR_ALIGN_CEIL(addr, pg_sz) != addr)
373 if (RTE_ALIGN_CEIL(len, pg_sz) != len)
376 if (mp->flags & MEMPOOL_F_NO_IOVA_CONTIG)
377 return rte_mempool_populate_iova(mp, addr, RTE_BAD_IOVA,
378 len, free_cb, opaque);
380 for (off = 0; off + pg_sz <= len &&
381 mp->populated_size < mp->size; off += phys_len) {
383 iova = rte_mem_virt2iova(addr + off);
385 if (iova == RTE_BAD_IOVA && rte_eal_has_hugepages()) {
390 /* populate with the largest group of contiguous pages */
391 for (phys_len = pg_sz; off + phys_len < len; phys_len += pg_sz) {
394 iova_tmp = rte_mem_virt2iova(addr + off + phys_len);
396 if (iova_tmp != iova + phys_len)
400 ret = rte_mempool_populate_iova(mp, addr + off, iova,
401 phys_len, free_cb, opaque);
404 /* no need to call the free callback for next chunks */
412 rte_mempool_free_memchunks(mp);
416 /* Default function to populate the mempool: allocate memory in memzones,
417 * and populate them. Return the number of objects added, or a negative
421 rte_mempool_populate_default(struct rte_mempool *mp)
423 unsigned int mz_flags = RTE_MEMZONE_1GB|RTE_MEMZONE_SIZE_HINT_ONLY;
424 char mz_name[RTE_MEMZONE_NAMESIZE];
425 const struct rte_memzone *mz;
427 size_t align, pg_sz, pg_shift;
431 bool no_contig, try_contig, no_pageshift, external;
433 ret = mempool_ops_alloc_once(mp);
437 /* check if we can retrieve a valid socket ID */
438 ret = rte_malloc_heap_socket_is_external(mp->socket_id);
443 /* mempool must not be populated */
444 if (mp->nb_mem_chunks != 0)
447 no_contig = mp->flags & MEMPOOL_F_NO_IOVA_CONTIG;
450 * the following section calculates page shift and page size values.
452 * these values impact the result of calc_mem_size operation, which
453 * returns the amount of memory that should be allocated to store the
454 * desired number of objects. when not zero, it allocates more memory
455 * for the padding between objects, to ensure that an object does not
456 * cross a page boundary. in other words, page size/shift are to be set
457 * to zero if mempool elements won't care about page boundaries.
458 * there are several considerations for page size and page shift here.
460 * if we don't need our mempools to have physically contiguous objects,
461 * then just set page shift and page size to 0, because the user has
462 * indicated that there's no need to care about anything.
464 * if we do need contiguous objects, there is also an option to reserve
465 * the entire mempool memory as one contiguous block of memory, in
466 * which case the page shift and alignment wouldn't matter as well.
468 * if we require contiguous objects, but not necessarily the entire
469 * mempool reserved space to be contiguous, then there are two options.
471 * if our IO addresses are virtual, not actual physical (IOVA as VA
472 * case), then no page shift needed - our memory allocation will give us
473 * contiguous IO memory as far as the hardware is concerned, so
474 * act as if we're getting contiguous memory.
476 * if our IO addresses are physical, we may get memory from bigger
477 * pages, or we might get memory from smaller pages, and how much of it
478 * we require depends on whether we want bigger or smaller pages.
479 * However, requesting each and every memory size is too much work, so
480 * what we'll do instead is walk through the page sizes available, pick
481 * the smallest one and set up page shift to match that one. We will be
482 * wasting some space this way, but it's much nicer than looping around
483 * trying to reserve each and every page size.
485 * However, since size calculation will produce page-aligned sizes, it
486 * makes sense to first try and see if we can reserve the entire memzone
487 * in one contiguous chunk as well (otherwise we might end up wasting a
488 * 1G page on a 10MB memzone). If we fail to get enough contiguous
489 * memory, then we'll go and reserve space page-by-page.
491 * We also have to take into account the fact that memory that we're
492 * going to allocate from can belong to an externally allocated memory
493 * area, in which case the assumption of IOVA as VA mode being
494 * synonymous with IOVA contiguousness will not hold. We should also try
495 * to go for contiguous memory even if we're in no-huge mode, because
496 * external memory may in fact be IOVA-contiguous.
498 external = rte_malloc_heap_socket_is_external(mp->socket_id) == 1;
499 no_pageshift = no_contig ||
500 (!external && rte_eal_iova_mode() == RTE_IOVA_VA);
501 try_contig = !no_contig && !no_pageshift &&
502 (rte_eal_has_hugepages() || external);
507 } else if (try_contig) {
508 pg_sz = get_min_page_size(mp->socket_id);
509 pg_shift = rte_bsf32(pg_sz);
511 pg_sz = getpagesize();
512 pg_shift = rte_bsf32(pg_sz);
515 for (mz_id = 0, n = mp->size; n > 0; mz_id++, n -= ret) {
516 size_t min_chunk_size;
519 if (try_contig || no_pageshift)
520 mem_size = rte_mempool_ops_calc_mem_size(mp, n,
521 0, &min_chunk_size, &align);
523 mem_size = rte_mempool_ops_calc_mem_size(mp, n,
524 pg_shift, &min_chunk_size, &align);
531 ret = snprintf(mz_name, sizeof(mz_name),
532 RTE_MEMPOOL_MZ_FORMAT "_%d", mp->name, mz_id);
533 if (ret < 0 || ret >= (int)sizeof(mz_name)) {
540 /* if we're trying to reserve contiguous memory, add appropriate
544 flags |= RTE_MEMZONE_IOVA_CONTIG;
546 mz = rte_memzone_reserve_aligned(mz_name, mem_size,
547 mp->socket_id, flags, align);
549 /* if we were trying to allocate contiguous memory, failed and
550 * minimum required contiguous chunk fits minimum page, adjust
551 * memzone size to the page size, and try again.
553 if (mz == NULL && try_contig && min_chunk_size <= pg_sz) {
555 flags &= ~RTE_MEMZONE_IOVA_CONTIG;
557 mem_size = rte_mempool_ops_calc_mem_size(mp, n,
558 pg_shift, &min_chunk_size, &align);
564 mz = rte_memzone_reserve_aligned(mz_name, mem_size,
565 mp->socket_id, flags, align);
567 /* don't try reserving with 0 size if we were asked to reserve
568 * IOVA-contiguous memory.
570 if (min_chunk_size < (size_t)mem_size && mz == NULL) {
571 /* not enough memory, retry with the biggest zone we
574 mz = rte_memzone_reserve_aligned(mz_name, 0,
575 mp->socket_id, flags,
576 RTE_MAX(pg_sz, align));
583 if (mz->len < min_chunk_size) {
584 rte_memzone_free(mz);
594 if (no_pageshift || try_contig)
595 ret = rte_mempool_populate_iova(mp, mz->addr,
597 rte_mempool_memchunk_mz_free,
598 (void *)(uintptr_t)mz);
600 ret = rte_mempool_populate_virt(mp, mz->addr,
601 RTE_ALIGN_FLOOR(mz->len, pg_sz), pg_sz,
602 rte_mempool_memchunk_mz_free,
603 (void *)(uintptr_t)mz);
605 rte_memzone_free(mz);
613 rte_mempool_free_memchunks(mp);
617 /* return the memory size required for mempool objects in anonymous mem */
619 get_anon_size(const struct rte_mempool *mp)
622 size_t pg_sz, pg_shift;
623 size_t min_chunk_size;
626 pg_sz = getpagesize();
627 pg_shift = rte_bsf32(pg_sz);
628 size = rte_mempool_ops_calc_mem_size(mp, mp->size, pg_shift,
629 &min_chunk_size, &align);
634 /* unmap a memory zone mapped by rte_mempool_populate_anon() */
636 rte_mempool_memchunk_anon_free(struct rte_mempool_memhdr *memhdr,
642 * Calculate size since memhdr->len has contiguous chunk length
643 * which may be smaller if anon map is split into many contiguous
644 * chunks. Result must be the same as we calculated on populate.
646 size = get_anon_size(memhdr->mp);
650 munmap(opaque, size);
653 /* populate the mempool with an anonymous mapping */
655 rte_mempool_populate_anon(struct rte_mempool *mp)
661 /* mempool is already populated, error */
662 if ((!STAILQ_EMPTY(&mp->mem_list)) || mp->nb_mem_chunks != 0) {
667 ret = mempool_ops_alloc_once(mp);
671 size = get_anon_size(mp);
677 /* get chunk of virtually continuous memory */
678 addr = mmap(NULL, size, PROT_READ | PROT_WRITE,
679 MAP_SHARED | MAP_ANONYMOUS, -1, 0);
680 if (addr == MAP_FAILED) {
684 /* can't use MMAP_LOCKED, it does not exist on BSD */
685 if (mlock(addr, size) < 0) {
691 ret = rte_mempool_populate_virt(mp, addr, size, getpagesize(),
692 rte_mempool_memchunk_anon_free, addr);
696 return mp->populated_size;
699 rte_mempool_free_memchunks(mp);
705 rte_mempool_free(struct rte_mempool *mp)
707 struct rte_mempool_list *mempool_list = NULL;
708 struct rte_tailq_entry *te;
713 mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
714 rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
715 /* find out tailq entry */
716 TAILQ_FOREACH(te, mempool_list, next) {
717 if (te->data == (void *)mp)
722 TAILQ_REMOVE(mempool_list, te, next);
725 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
727 rte_mempool_free_memchunks(mp);
728 rte_mempool_ops_free(mp);
729 rte_memzone_free(mp->mz);
733 mempool_cache_init(struct rte_mempool_cache *cache, uint32_t size)
736 cache->flushthresh = CALC_CACHE_FLUSHTHRESH(size);
741 * Create and initialize a cache for objects that are retrieved from and
742 * returned to an underlying mempool. This structure is identical to the
743 * local_cache[lcore_id] pointed to by the mempool structure.
745 struct rte_mempool_cache *
746 rte_mempool_cache_create(uint32_t size, int socket_id)
748 struct rte_mempool_cache *cache;
750 if (size == 0 || size > RTE_MEMPOOL_CACHE_MAX_SIZE) {
755 cache = rte_zmalloc_socket("MEMPOOL_CACHE", sizeof(*cache),
756 RTE_CACHE_LINE_SIZE, socket_id);
758 RTE_LOG(ERR, MEMPOOL, "Cannot allocate mempool cache.\n");
763 mempool_cache_init(cache, size);
769 * Free a cache. It's the responsibility of the user to make sure that any
770 * remaining objects in the cache are flushed to the corresponding
774 rte_mempool_cache_free(struct rte_mempool_cache *cache)
779 /* create an empty mempool */
781 rte_mempool_create_empty(const char *name, unsigned n, unsigned elt_size,
782 unsigned cache_size, unsigned private_data_size,
783 int socket_id, unsigned flags)
785 char mz_name[RTE_MEMZONE_NAMESIZE];
786 struct rte_mempool_list *mempool_list;
787 struct rte_mempool *mp = NULL;
788 struct rte_tailq_entry *te = NULL;
789 const struct rte_memzone *mz = NULL;
791 unsigned int mz_flags = RTE_MEMZONE_1GB|RTE_MEMZONE_SIZE_HINT_ONLY;
792 struct rte_mempool_objsz objsz;
796 /* compilation-time checks */
797 RTE_BUILD_BUG_ON((sizeof(struct rte_mempool) &
798 RTE_CACHE_LINE_MASK) != 0);
799 RTE_BUILD_BUG_ON((sizeof(struct rte_mempool_cache) &
800 RTE_CACHE_LINE_MASK) != 0);
801 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
802 RTE_BUILD_BUG_ON((sizeof(struct rte_mempool_debug_stats) &
803 RTE_CACHE_LINE_MASK) != 0);
804 RTE_BUILD_BUG_ON((offsetof(struct rte_mempool, stats) &
805 RTE_CACHE_LINE_MASK) != 0);
808 mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
810 /* asked for zero items */
816 /* asked cache too big */
817 if (cache_size > RTE_MEMPOOL_CACHE_MAX_SIZE ||
818 CALC_CACHE_FLUSHTHRESH(cache_size) > n) {
823 /* "no cache align" imply "no spread" */
824 if (flags & MEMPOOL_F_NO_CACHE_ALIGN)
825 flags |= MEMPOOL_F_NO_SPREAD;
827 /* calculate mempool object sizes. */
828 if (!rte_mempool_calc_obj_size(elt_size, flags, &objsz)) {
833 rte_rwlock_write_lock(RTE_EAL_MEMPOOL_RWLOCK);
836 * reserve a memory zone for this mempool: private data is
839 private_data_size = (private_data_size +
840 RTE_MEMPOOL_ALIGN_MASK) & (~RTE_MEMPOOL_ALIGN_MASK);
843 /* try to allocate tailq entry */
844 te = rte_zmalloc("MEMPOOL_TAILQ_ENTRY", sizeof(*te), 0);
846 RTE_LOG(ERR, MEMPOOL, "Cannot allocate tailq entry!\n");
850 mempool_size = MEMPOOL_HEADER_SIZE(mp, cache_size);
851 mempool_size += private_data_size;
852 mempool_size = RTE_ALIGN_CEIL(mempool_size, RTE_MEMPOOL_ALIGN);
854 ret = snprintf(mz_name, sizeof(mz_name), RTE_MEMPOOL_MZ_FORMAT, name);
855 if (ret < 0 || ret >= (int)sizeof(mz_name)) {
856 rte_errno = ENAMETOOLONG;
860 mz = rte_memzone_reserve(mz_name, mempool_size, socket_id, mz_flags);
864 /* init the mempool structure */
866 memset(mp, 0, MEMPOOL_HEADER_SIZE(mp, cache_size));
867 ret = snprintf(mp->name, sizeof(mp->name), "%s", name);
868 if (ret < 0 || ret >= (int)sizeof(mp->name)) {
869 rte_errno = ENAMETOOLONG;
875 mp->socket_id = socket_id;
876 mp->elt_size = objsz.elt_size;
877 mp->header_size = objsz.header_size;
878 mp->trailer_size = objsz.trailer_size;
879 /* Size of default caches, zero means disabled. */
880 mp->cache_size = cache_size;
881 mp->private_data_size = private_data_size;
882 STAILQ_INIT(&mp->elt_list);
883 STAILQ_INIT(&mp->mem_list);
886 * local_cache pointer is set even if cache_size is zero.
887 * The local_cache points to just past the elt_pa[] array.
889 mp->local_cache = (struct rte_mempool_cache *)
890 RTE_PTR_ADD(mp, MEMPOOL_HEADER_SIZE(mp, 0));
892 /* Init all default caches. */
893 if (cache_size != 0) {
894 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
895 mempool_cache_init(&mp->local_cache[lcore_id],
901 rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
902 TAILQ_INSERT_TAIL(mempool_list, te, next);
903 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
904 rte_rwlock_write_unlock(RTE_EAL_MEMPOOL_RWLOCK);
909 rte_rwlock_write_unlock(RTE_EAL_MEMPOOL_RWLOCK);
911 rte_mempool_free(mp);
915 /* create the mempool */
917 rte_mempool_create(const char *name, unsigned n, unsigned elt_size,
918 unsigned cache_size, unsigned private_data_size,
919 rte_mempool_ctor_t *mp_init, void *mp_init_arg,
920 rte_mempool_obj_cb_t *obj_init, void *obj_init_arg,
921 int socket_id, unsigned flags)
924 struct rte_mempool *mp;
926 mp = rte_mempool_create_empty(name, n, elt_size, cache_size,
927 private_data_size, socket_id, flags);
932 * Since we have 4 combinations of the SP/SC/MP/MC examine the flags to
933 * set the correct index into the table of ops structs.
935 if ((flags & MEMPOOL_F_SP_PUT) && (flags & MEMPOOL_F_SC_GET))
936 ret = rte_mempool_set_ops_byname(mp, "ring_sp_sc", NULL);
937 else if (flags & MEMPOOL_F_SP_PUT)
938 ret = rte_mempool_set_ops_byname(mp, "ring_sp_mc", NULL);
939 else if (flags & MEMPOOL_F_SC_GET)
940 ret = rte_mempool_set_ops_byname(mp, "ring_mp_sc", NULL);
942 ret = rte_mempool_set_ops_byname(mp, "ring_mp_mc", NULL);
947 /* call the mempool priv initializer */
949 mp_init(mp, mp_init_arg);
951 if (rte_mempool_populate_default(mp) < 0)
954 /* call the object initializers */
956 rte_mempool_obj_iter(mp, obj_init, obj_init_arg);
961 rte_mempool_free(mp);
965 /* Return the number of entries in the mempool */
967 rte_mempool_avail_count(const struct rte_mempool *mp)
972 count = rte_mempool_ops_get_count(mp);
974 if (mp->cache_size == 0)
977 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
978 count += mp->local_cache[lcore_id].len;
981 * due to race condition (access to len is not locked), the
982 * total can be greater than size... so fix the result
984 if (count > mp->size)
989 /* return the number of entries allocated from the mempool */
991 rte_mempool_in_use_count(const struct rte_mempool *mp)
993 return mp->size - rte_mempool_avail_count(mp);
996 /* dump the cache status */
998 rte_mempool_dump_cache(FILE *f, const struct rte_mempool *mp)
1002 unsigned cache_count;
1004 fprintf(f, " internal cache infos:\n");
1005 fprintf(f, " cache_size=%"PRIu32"\n", mp->cache_size);
1007 if (mp->cache_size == 0)
1010 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
1011 cache_count = mp->local_cache[lcore_id].len;
1012 fprintf(f, " cache_count[%u]=%"PRIu32"\n",
1013 lcore_id, cache_count);
1014 count += cache_count;
1016 fprintf(f, " total_cache_count=%u\n", count);
1020 #ifndef __INTEL_COMPILER
1021 #pragma GCC diagnostic ignored "-Wcast-qual"
1024 /* check and update cookies or panic (internal) */
1025 void rte_mempool_check_cookies(const struct rte_mempool *mp,
1026 void * const *obj_table_const, unsigned n, int free)
1028 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
1029 struct rte_mempool_objhdr *hdr;
1030 struct rte_mempool_objtlr *tlr;
1036 /* Force to drop the "const" attribute. This is done only when
1037 * DEBUG is enabled */
1038 tmp = (void *) obj_table_const;
1044 if (rte_mempool_from_obj(obj) != mp)
1045 rte_panic("MEMPOOL: object is owned by another "
1048 hdr = __mempool_get_header(obj);
1049 cookie = hdr->cookie;
1052 if (cookie != RTE_MEMPOOL_HEADER_COOKIE1) {
1053 RTE_LOG(CRIT, MEMPOOL,
1054 "obj=%p, mempool=%p, cookie=%" PRIx64 "\n",
1055 obj, (const void *) mp, cookie);
1056 rte_panic("MEMPOOL: bad header cookie (put)\n");
1058 hdr->cookie = RTE_MEMPOOL_HEADER_COOKIE2;
1059 } else if (free == 1) {
1060 if (cookie != RTE_MEMPOOL_HEADER_COOKIE2) {
1061 RTE_LOG(CRIT, MEMPOOL,
1062 "obj=%p, mempool=%p, cookie=%" PRIx64 "\n",
1063 obj, (const void *) mp, cookie);
1064 rte_panic("MEMPOOL: bad header cookie (get)\n");
1066 hdr->cookie = RTE_MEMPOOL_HEADER_COOKIE1;
1067 } else if (free == 2) {
1068 if (cookie != RTE_MEMPOOL_HEADER_COOKIE1 &&
1069 cookie != RTE_MEMPOOL_HEADER_COOKIE2) {
1070 RTE_LOG(CRIT, MEMPOOL,
1071 "obj=%p, mempool=%p, cookie=%" PRIx64 "\n",
1072 obj, (const void *) mp, cookie);
1073 rte_panic("MEMPOOL: bad header cookie (audit)\n");
1076 tlr = __mempool_get_trailer(obj);
1077 cookie = tlr->cookie;
1078 if (cookie != RTE_MEMPOOL_TRAILER_COOKIE) {
1079 RTE_LOG(CRIT, MEMPOOL,
1080 "obj=%p, mempool=%p, cookie=%" PRIx64 "\n",
1081 obj, (const void *) mp, cookie);
1082 rte_panic("MEMPOOL: bad trailer cookie\n");
1087 RTE_SET_USED(obj_table_const);
1094 rte_mempool_contig_blocks_check_cookies(const struct rte_mempool *mp,
1095 void * const *first_obj_table_const, unsigned int n, int free)
1097 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
1098 struct rte_mempool_info info;
1099 const size_t total_elt_sz =
1100 mp->header_size + mp->elt_size + mp->trailer_size;
1103 rte_mempool_ops_get_info(mp, &info);
1105 for (i = 0; i < n; ++i) {
1106 void *first_obj = first_obj_table_const[i];
1108 for (j = 0; j < info.contig_block_size; ++j) {
1111 obj = (void *)((uintptr_t)first_obj + j * total_elt_sz);
1112 rte_mempool_check_cookies(mp, &obj, 1, free);
1117 RTE_SET_USED(first_obj_table_const);
1123 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
1125 mempool_obj_audit(struct rte_mempool *mp, __rte_unused void *opaque,
1126 void *obj, __rte_unused unsigned idx)
1128 __mempool_check_cookies(mp, &obj, 1, 2);
1132 mempool_audit_cookies(struct rte_mempool *mp)
1136 num = rte_mempool_obj_iter(mp, mempool_obj_audit, NULL);
1137 if (num != mp->size) {
1138 rte_panic("rte_mempool_obj_iter(mempool=%p, size=%u) "
1139 "iterated only over %u elements\n",
1144 #define mempool_audit_cookies(mp) do {} while(0)
1147 #ifndef __INTEL_COMPILER
1148 #pragma GCC diagnostic error "-Wcast-qual"
1151 /* check cookies before and after objects */
1153 mempool_audit_cache(const struct rte_mempool *mp)
1155 /* check cache size consistency */
1158 if (mp->cache_size == 0)
1161 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
1162 const struct rte_mempool_cache *cache;
1163 cache = &mp->local_cache[lcore_id];
1164 if (cache->len > cache->flushthresh) {
1165 RTE_LOG(CRIT, MEMPOOL, "badness on cache[%u]\n",
1167 rte_panic("MEMPOOL: invalid cache len\n");
1172 /* check the consistency of mempool (size, cookies, ...) */
1174 rte_mempool_audit(struct rte_mempool *mp)
1176 mempool_audit_cache(mp);
1177 mempool_audit_cookies(mp);
1179 /* For case where mempool DEBUG is not set, and cache size is 0 */
1183 /* dump the status of the mempool on the console */
1185 rte_mempool_dump(FILE *f, struct rte_mempool *mp)
1187 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
1188 struct rte_mempool_info info;
1189 struct rte_mempool_debug_stats sum;
1192 struct rte_mempool_memhdr *memhdr;
1193 unsigned common_count;
1194 unsigned cache_count;
1197 RTE_ASSERT(f != NULL);
1198 RTE_ASSERT(mp != NULL);
1200 fprintf(f, "mempool <%s>@%p\n", mp->name, mp);
1201 fprintf(f, " flags=%x\n", mp->flags);
1202 fprintf(f, " pool=%p\n", mp->pool_data);
1203 fprintf(f, " iova=0x%" PRIx64 "\n", mp->mz->iova);
1204 fprintf(f, " nb_mem_chunks=%u\n", mp->nb_mem_chunks);
1205 fprintf(f, " size=%"PRIu32"\n", mp->size);
1206 fprintf(f, " populated_size=%"PRIu32"\n", mp->populated_size);
1207 fprintf(f, " header_size=%"PRIu32"\n", mp->header_size);
1208 fprintf(f, " elt_size=%"PRIu32"\n", mp->elt_size);
1209 fprintf(f, " trailer_size=%"PRIu32"\n", mp->trailer_size);
1210 fprintf(f, " total_obj_size=%"PRIu32"\n",
1211 mp->header_size + mp->elt_size + mp->trailer_size);
1213 fprintf(f, " private_data_size=%"PRIu32"\n", mp->private_data_size);
1215 STAILQ_FOREACH(memhdr, &mp->mem_list, next)
1216 mem_len += memhdr->len;
1218 fprintf(f, " avg bytes/object=%#Lf\n",
1219 (long double)mem_len / mp->size);
1222 cache_count = rte_mempool_dump_cache(f, mp);
1223 common_count = rte_mempool_ops_get_count(mp);
1224 if ((cache_count + common_count) > mp->size)
1225 common_count = mp->size - cache_count;
1226 fprintf(f, " common_pool_count=%u\n", common_count);
1228 /* sum and dump statistics */
1229 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG
1230 rte_mempool_ops_get_info(mp, &info);
1231 memset(&sum, 0, sizeof(sum));
1232 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
1233 sum.put_bulk += mp->stats[lcore_id].put_bulk;
1234 sum.put_objs += mp->stats[lcore_id].put_objs;
1235 sum.get_success_bulk += mp->stats[lcore_id].get_success_bulk;
1236 sum.get_success_objs += mp->stats[lcore_id].get_success_objs;
1237 sum.get_fail_bulk += mp->stats[lcore_id].get_fail_bulk;
1238 sum.get_fail_objs += mp->stats[lcore_id].get_fail_objs;
1239 sum.get_success_blks += mp->stats[lcore_id].get_success_blks;
1240 sum.get_fail_blks += mp->stats[lcore_id].get_fail_blks;
1242 fprintf(f, " stats:\n");
1243 fprintf(f, " put_bulk=%"PRIu64"\n", sum.put_bulk);
1244 fprintf(f, " put_objs=%"PRIu64"\n", sum.put_objs);
1245 fprintf(f, " get_success_bulk=%"PRIu64"\n", sum.get_success_bulk);
1246 fprintf(f, " get_success_objs=%"PRIu64"\n", sum.get_success_objs);
1247 fprintf(f, " get_fail_bulk=%"PRIu64"\n", sum.get_fail_bulk);
1248 fprintf(f, " get_fail_objs=%"PRIu64"\n", sum.get_fail_objs);
1249 if (info.contig_block_size > 0) {
1250 fprintf(f, " get_success_blks=%"PRIu64"\n",
1251 sum.get_success_blks);
1252 fprintf(f, " get_fail_blks=%"PRIu64"\n", sum.get_fail_blks);
1255 fprintf(f, " no statistics available\n");
1258 rte_mempool_audit(mp);
1261 /* dump the status of all mempools on the console */
1263 rte_mempool_list_dump(FILE *f)
1265 struct rte_mempool *mp = NULL;
1266 struct rte_tailq_entry *te;
1267 struct rte_mempool_list *mempool_list;
1269 mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
1271 rte_rwlock_read_lock(RTE_EAL_MEMPOOL_RWLOCK);
1273 TAILQ_FOREACH(te, mempool_list, next) {
1274 mp = (struct rte_mempool *) te->data;
1275 rte_mempool_dump(f, mp);
1278 rte_rwlock_read_unlock(RTE_EAL_MEMPOOL_RWLOCK);
1281 /* search a mempool from its name */
1282 struct rte_mempool *
1283 rte_mempool_lookup(const char *name)
1285 struct rte_mempool *mp = NULL;
1286 struct rte_tailq_entry *te;
1287 struct rte_mempool_list *mempool_list;
1289 mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
1291 rte_rwlock_read_lock(RTE_EAL_MEMPOOL_RWLOCK);
1293 TAILQ_FOREACH(te, mempool_list, next) {
1294 mp = (struct rte_mempool *) te->data;
1295 if (strncmp(name, mp->name, RTE_MEMPOOL_NAMESIZE) == 0)
1299 rte_rwlock_read_unlock(RTE_EAL_MEMPOOL_RWLOCK);
1309 void rte_mempool_walk(void (*func)(struct rte_mempool *, void *),
1312 struct rte_tailq_entry *te = NULL;
1313 struct rte_mempool_list *mempool_list;
1316 mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
1318 rte_rwlock_read_lock(RTE_EAL_MEMPOOL_RWLOCK);
1320 TAILQ_FOREACH_SAFE(te, mempool_list, next, tmp_te) {
1321 (*func)((struct rte_mempool *) te->data, arg);
1324 rte_rwlock_read_unlock(RTE_EAL_MEMPOOL_RWLOCK);