rv = alloc_arena_next (h);
alloc_arena_next (h) += nbytes;
- if (rv >= (alloc_arena (h) + alloc_arena_size (h)))
+ if (alloc_arena_next (h) > alloc_arena_size (h))
os_out_of_memory ();
- return (void *) rv;
+ return (void *) (uword) (rv + alloc_arena (h));
}
-
-void BV (clib_bihash_init)
- (BVT (clib_bihash) * h, char *name, u32 nbuckets, uword memory_size)
+static void BV (clib_bihash_instantiate) (BVT (clib_bihash) * h)
{
uword bucket_size;
- nbuckets = 1 << (max_log2 (nbuckets));
+ alloc_arena (h) = (uword) clib_mem_vm_alloc (h->memory_size);
+ alloc_arena_next (h) = 0;
+ alloc_arena_size (h) = h->memory_size;
- h->name = (u8 *) name;
- h->nbuckets = nbuckets;
- h->log2_nbuckets = max_log2 (nbuckets);
+ bucket_size = h->nbuckets * sizeof (h->buckets[0]);
+ h->buckets = BV (alloc_aligned) (h, bucket_size);
+ CLIB_MEMORY_BARRIER ();
+ h->instantiated = 1;
+}
+
+void BV (clib_bihash_init2) (BVT (clib_bihash_init2_args) * a)
+{
+ int i;
+ void *oldheap;
+ BVT (clib_bihash) * h = a->h;
+
+ a->nbuckets = 1 << (max_log2 (a->nbuckets));
+
+ h->name = (u8 *) a->name;
+ h->nbuckets = a->nbuckets;
+ h->log2_nbuckets = max_log2 (a->nbuckets);
+ h->memory_size = a->memory_size;
+ h->instantiated = 0;
+ h->fmt_fn = a->fmt_fn;
+
+ alloc_arena (h) = 0;
/*
* Make sure the requested size is rational. The max table
* If someone starts complaining that's not enough, we can shift
* the offset by CLIB_LOG2_CACHE_LINE_BYTES...
*/
- ASSERT (memory_size < (1ULL << BIHASH_BUCKET_OFFSET_BITS));
+ ASSERT (h->memory_size < (1ULL << BIHASH_BUCKET_OFFSET_BITS));
- alloc_arena (h) = (uword) clib_mem_vm_alloc (memory_size);
- alloc_arena_next (h) = alloc_arena (h);
- alloc_arena_size (h) = memory_size;
+ /* Add this hash table to the list */
+ if (a->dont_add_to_all_bihash_list == 0)
+ {
+ for (i = 0; i < vec_len (clib_all_bihashes); i++)
+ if (clib_all_bihashes[i] == h)
+ goto do_lock;
+ oldheap = clib_all_bihash_set_heap ();
+ vec_add1 (clib_all_bihashes, (void *) h);
+ clib_mem_set_heap (oldheap);
+ }
- bucket_size = nbuckets * sizeof (h->buckets[0]);
- h->buckets = BV (alloc_aligned) (h, bucket_size);
+do_lock:
+ if (h->alloc_lock)
+ clib_mem_free ((void *) h->alloc_lock);
- h->alloc_lock = BV (alloc_aligned) (h, CLIB_CACHE_LINE_BYTES);
+ /*
+ * Set up the lock now, so we can use it to make the first add
+ * thread-safe
+ */
+ h->alloc_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
+ CLIB_CACHE_LINE_BYTES);
h->alloc_lock[0] = 0;
- h->fmt_fn = NULL;
+ if (a->instantiate_immediately)
+ BV (clib_bihash_instantiate) (h);
+}
+
+void BV (clib_bihash_init)
+ (BVT (clib_bihash) * h, char *name, u32 nbuckets, uword memory_size)
+{
+ BVT (clib_bihash_init2_args) _a, *a = &_a;
+
+ memset (a, 0, sizeof (*a));
+
+ a->h = h;
+ a->name = name;
+ a->nbuckets = nbuckets;
+ a->memory_size = memory_size;
+
+ BV (clib_bihash_init2) (a);
}
#if BIHASH_32_64_SVM
#endif
void BV (clib_bihash_master_init_svm)
- (BVT (clib_bihash) * h, char *name, u32 nbuckets,
- u64 base_address, u64 memory_size)
+ (BVT (clib_bihash) * h, char *name, u32 nbuckets, u64 memory_size)
{
uword bucket_size;
u8 *mmap_addr;
vec_header_t *freelist_vh;
int fd;
- ASSERT (base_address);
- ASSERT (base_address + memory_size < (1ULL << 32));
-
+ ASSERT (memory_size < (1ULL << 32));
/* Set up for memfd sharing */
if ((fd = memfd_create (name, MFD_ALLOW_SEALING)) == -1)
{
if ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
clib_unix_warning ("fcntl (F_ADD_SEALS)");
- mmap_addr = mmap (u64_to_pointer (base_address), memory_size,
- PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, fd,
- 0 /* offset */ );
+ mmap_addr = mmap (0, memory_size,
+ PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 /* offset */ );
if (mmap_addr == MAP_FAILED)
{
h->log2_nbuckets = max_log2 (nbuckets);
alloc_arena (h) = (u64) (uword) mmap_addr;
- alloc_arena_next (h) = alloc_arena (h) + CLIB_CACHE_LINE_BYTES;
+ alloc_arena_next (h) = CLIB_CACHE_LINE_BYTES;
alloc_arena_size (h) = memory_size;
bucket_size = nbuckets * sizeof (h->buckets[0]);
h->buckets = BV (alloc_aligned) (h, bucket_size);
- h->sh->buckets_as_u64 = (u64) (uword) h->buckets;
+ h->sh->buckets_as_u64 = (u64) BV (clib_bihash_get_offset) (h, h->buckets);
h->alloc_lock = BV (alloc_aligned) (h, CLIB_CACHE_LINE_BYTES);
h->alloc_lock[0] = 0;
- h->sh->alloc_lock_as_u64 = (u64) (uword) (h->alloc_lock);
- freelist_vh = BV (alloc_aligned) (h, sizeof (vec_header_t) +
- BIHASH_FREELIST_LENGTH * sizeof (u64));
+ h->sh->alloc_lock_as_u64 =
+ (u64) BV (clib_bihash_get_offset) (h, (void *) h->alloc_lock);
+ freelist_vh =
+ BV (alloc_aligned) (h,
+ sizeof (vec_header_t) +
+ BIHASH_FREELIST_LENGTH * sizeof (u64));
freelist_vh->len = BIHASH_FREELIST_LENGTH;
- freelist_vh->dlmalloc_header_offset = 0xDEADBEEF;
- h->sh->freelists_as_u64 = (u64) (uword) freelist_vh->vector_data;
- h->freelists = (void *) (uword) (h->sh->freelists_as_u64);
+ h->sh->freelists_as_u64 =
+ (u64) BV (clib_bihash_get_offset) (h, freelist_vh->vector_data);
+ h->freelists = (void *) (freelist_vh->vector_data);
h->fmt_fn = NULL;
+ h->instantiated = 1;
}
void BV (clib_bihash_slave_init_svm)
(BVT (clib_bihash) * h, char *name, int fd)
{
u8 *mmap_addr;
- u64 base_address, memory_size;
+ u64 memory_size;
BVT (clib_bihash_shared_header) * sh;
- /* Trial mapping, to place the segment */
+ /* Trial mapping, to learn the segment size */
mmap_addr = mmap (0, 4096, PROT_READ, MAP_SHARED, fd, 0 /* offset */ );
if (mmap_addr == MAP_FAILED)
{
sh = (BVT (clib_bihash_shared_header) *) mmap_addr;
- base_address = sh->alloc_arena;
memory_size = sh->alloc_arena_size;
munmap (mmap_addr, 4096);
- /* Actual mapping, at the required address */
- mmap_addr = mmap (u64_to_pointer (base_address), memory_size,
- PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, fd,
- 0 /* offset */ );
+ /* Actual mapping, at the required size */
+ mmap_addr = mmap (0, memory_size,
+ PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 /* offset */ );
if (mmap_addr == MAP_FAILED)
{
(void) close (fd);
h->sh = (void *) mmap_addr;
+ alloc_arena (h) = (u64) (uword) mmap_addr;
h->memfd = -1;
h->name = (u8 *) name;
- h->buckets = u64_to_pointer (h->sh->buckets_as_u64);
+ h->buckets = BV (clib_bihash_get_value) (h, h->sh->buckets_as_u64);
h->nbuckets = h->sh->nbuckets;
h->log2_nbuckets = max_log2 (h->nbuckets);
- h->alloc_lock = u64_to_pointer (h->sh->alloc_lock_as_u64);
- h->freelists = u64_to_pointer (h->sh->freelists_as_u64);
+ h->alloc_lock = BV (clib_bihash_get_value) (h, h->sh->alloc_lock_as_u64);
+ h->freelists = BV (clib_bihash_get_value) (h, h->sh->freelists_as_u64);
h->fmt_fn = NULL;
}
#endif /* BIHASH_32_64_SVM */
void BV (clib_bihash_free) (BVT (clib_bihash) * h)
{
+ int i;
+
+ if (PREDICT_FALSE (h->instantiated == 0))
+ goto never_initialized;
+
+ h->instantiated = 0;
vec_free (h->working_copies);
+ vec_free (h->working_copy_lengths);
#if BIHASH_32_64_SVM == 0
vec_free (h->freelists);
#else
(void) close (h->memfd);
#endif
clib_mem_vm_free ((void *) (uword) (alloc_arena (h)), alloc_arena_size (h));
- memset (h, 0, sizeof (*h));
+never_initialized:
+ clib_memset (h, 0, sizeof (*h));
+ for (i = 0; i < vec_len (clib_all_bihashes); i++)
+ {
+ if ((void *) h == clib_all_bihashes[i])
+ {
+ vec_delete (clib_all_bihashes, 1, i);
+ return;
+ }
+ }
+ clib_warning ("Couldn't find hash table %llx on clib_all_bihashes...",
+ (u64) (uword) h);
}
static
rv = BV (alloc_aligned) (h, (sizeof (*rv) * (1 << log2_pages)));
goto initialize;
}
- rv = (void *) (uword) h->freelists[log2_pages];
+ rv = BV (clib_bihash_get_value) (h, (uword) h->freelists[log2_pages]);
h->freelists[log2_pages] = rv->next_free_as_u64;
initialize:
* if we replace (1<<log2_pages) with vec_len(rv).
* No clue.
*/
- memset (rv, 0xff, sizeof (*rv) * (1 << log2_pages));
+ clib_memset (rv, 0xff, sizeof (*rv) * (1 << log2_pages));
return rv;
}
ASSERT (vec_len (h->freelists) > log2_pages);
if (CLIB_DEBUG > 0)
- memset (v, 0xFE, sizeof (*v) * (1 << log2_pages));
+ clib_memset (v, 0xFE, sizeof (*v) * (1 << log2_pages));
v->next_free_as_u64 = (u64) h->freelists[log2_pages];
- h->freelists[log2_pages] = (u64) (uword) v;
+ h->freelists[log2_pages] = (u64) BV (clib_bihash_get_offset) (h, v);
}
static inline void
(h, sizeof (working_copy[0]) * (1 << b->log2_pages));
h->working_copy_lengths[thread_index] = b->log2_pages;
h->working_copies[thread_index] = working_copy;
+
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_working_copy_lost,
+ 1ULL << b->log2_pages);
}
v = BV (clib_bihash_get_value) (h, b->offset);
- clib_memcpy (working_copy, v, sizeof (*v) * (1 << b->log2_pages));
+ clib_memcpy_fast (working_copy, v, sizeof (*v) * (1 << b->log2_pages));
working_bucket.as_u64 = b->as_u64;
working_bucket.offset = BV (clib_bihash_get_offset) (h, working_copy);
CLIB_MEMORY_BARRIER ();
/* Empty slot */
if (BV (clib_bihash_is_free) (&(new_v->kvp[j])))
{
- clib_memcpy (&(new_v->kvp[j]), &(old_values->kvp[i]),
- sizeof (new_v->kvp[j]));
+ clib_memcpy_fast (&(new_v->kvp[j]), &(old_values->kvp[i]),
+ sizeof (new_v->kvp[j]));
goto doublebreak;
}
}
if (BV (clib_bihash_is_free) (&(new_values->kvp[j])))
{
/* Copy the old value and move along */
- clib_memcpy (&(new_values->kvp[j]), &(old_values->kvp[i]),
- sizeof (new_values->kvp[j]));
+ clib_memcpy_fast (&(new_values->kvp[j]), &(old_values->kvp[i]),
+ sizeof (new_values->kvp[j]));
j++;
goto doublebreak;
}
int mark_bucket_linear;
int resplit_once;
+ /*
+ * Create the table (is_add=1,2), or flunk the request now (is_add=0)
+ * Use the alloc_lock to protect the instantiate operation.
+ */
+ if (PREDICT_FALSE (h->instantiated == 0))
+ {
+ if (is_add == 0)
+ return (-1);
+
+ BV (clib_bihash_alloc_lock) (h);
+ if (h->instantiated == 0)
+ BV (clib_bihash_instantiate) (h);
+ BV (clib_bihash_alloc_unlock) (h);
+ }
+
hash = BV (clib_bihash_hash) (add_v);
bucket_index = hash & (h->nbuckets - 1);
tmp_b.refcnt = 1;
CLIB_MEMORY_BARRIER ();
- b->as_u64 = tmp_b.as_u64;
- BV (clib_bihash_unlock_bucket) (b);
+ b->as_u64 = tmp_b.as_u64; /* unlocks the bucket */
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_alloc_add, 1);
+
return (0);
}
*/
for (i = 0; i < limit; i++)
{
- if (!memcmp (&(v->kvp[i]), &add_v->key, sizeof (add_v->key)))
+ if (BV (clib_bihash_key_compare) (v->kvp[i].key, add_v->key))
{
+ /* Add but do not overwrite? */
+ if (is_add == 2)
+ {
+ BV (clib_bihash_unlock_bucket) (b);
+ return (-2);
+ }
+
CLIB_MEMORY_BARRIER (); /* Add a delay */
- clib_memcpy (&(v->kvp[i]), add_v, sizeof (*add_v));
+ clib_memcpy_fast (&(v->kvp[i]), add_v, sizeof (*add_v));
BV (clib_bihash_unlock_bucket) (b);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_replace, 1);
return (0);
}
}
* Copy the value first, so that if a reader manages
* to match the new key, the value will be right...
*/
- clib_memcpy (&(v->kvp[i].value),
- &add_v->value, sizeof (add_v->value));
+ clib_memcpy_fast (&(v->kvp[i].value),
+ &add_v->value, sizeof (add_v->value));
CLIB_MEMORY_BARRIER (); /* Make sure the value has settled */
- clib_memcpy (&(v->kvp[i]), &add_v->key, sizeof (add_v->key));
+ clib_memcpy_fast (&(v->kvp[i]), &add_v->key,
+ sizeof (add_v->key));
b->refcnt++;
ASSERT (b->refcnt > 0);
BV (clib_bihash_unlock_bucket) (b);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_add, 1);
return (0);
}
}
if (is_stale_cb (&(v->kvp[i]), arg))
{
CLIB_MEMORY_BARRIER ();
- clib_memcpy (&(v->kvp[i]), add_v, sizeof (*add_v));
+ clib_memcpy_fast (&(v->kvp[i]), add_v, sizeof (*add_v));
BV (clib_bihash_unlock_bucket) (b);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_replace, 1);
return (0);
}
}
for (i = 0; i < limit; i++)
{
/* Found the key? Kill it... */
- if (!memcmp (&(v->kvp[i]), &add_v->key, sizeof (add_v->key)))
+ if (BV (clib_bihash_key_compare) (v->kvp[i].key, add_v->key))
{
- memset (&(v->kvp[i]), 0xff, sizeof (*(add_v)));
+ clib_memset (&(v->kvp[i]), 0xff, sizeof (*(add_v)));
/* Is the bucket empty? */
if (PREDICT_TRUE (b->refcnt > 1))
{
b->refcnt--;
BV (clib_bihash_unlock_bucket) (b);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_del, 1);
return (0);
}
else /* yes, free it */
v = BV (clib_bihash_get_value) (h, tmp_b.offset);
BV (value_free) (h, v, tmp_b.log2_pages);
BV (clib_bihash_alloc_unlock) (h);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_del_free,
+ 1);
return (0);
}
}
old_log2_pages = h->saved_bucket.log2_pages;
new_log2_pages = old_log2_pages + 1;
mark_bucket_linear = 0;
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_split_add, 1);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_splits, old_log2_pages);
working_copy = h->working_copies[thread_index];
resplit_once = 0;
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_splits, 1);
new_v = BV (split_and_rehash) (h, working_copy, old_log2_pages,
new_log2_pages);
BV (split_and_rehash_linear) (h, working_copy, old_log2_pages,
new_log2_pages);
mark_bucket_linear = 1;
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_linear, 1);
}
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_resplit, 1);
+ BV (clib_bihash_increment_stat) (h, BIHASH_STAT_splits,
+ old_log2_pages + 1);
}
/* Try to add the new entry */
{
if (BV (clib_bihash_is_free) (&(new_v->kvp[i])))
{
- clib_memcpy (&(new_v->kvp[i]), add_v, sizeof (*add_v));
+ clib_memcpy_fast (&(new_v->kvp[i]), add_v, sizeof (*add_v));
goto expand_ok;
}
}
tmp_b.lock = 0;
CLIB_MEMORY_BARRIER ();
b->as_u64 = tmp_b.as_u64;
+ /* free the old bucket */
+ v = BV (clib_bihash_get_value) (h, h->saved_bucket.offset);
+ BV (value_free) (h, v, h->saved_bucket.log2_pages);
BV (clib_bihash_alloc_unlock) (h);
return (0);
}
ASSERT (valuep);
+ if (PREDICT_FALSE (alloc_arena (h) == 0))
+ return -1;
+
hash = BV (clib_bihash_hash) (search_key);
bucket_index = hash & (h->nbuckets - 1);
s = format (s, "Hash table %s\n", h->name ? h->name : (u8 *) "(unnamed)");
+ if (PREDICT_FALSE (alloc_arena (h) == 0))
+ return format (s, "[empty, uninitialized]");
+
for (i = 0; i < h->nbuckets; i++)
{
b = &h->buckets[i];
{
s = format (s, " %d: %U\n",
j * BIHASH_KVP_PER_PAGE + k,
- h->fmt_fn, &(v->kvp[k]));
+ h->fmt_fn, &(v->kvp[k]), verbose);
}
else
{
{
u32 nfree = 0;
BVT (clib_bihash_value) * free_elt;
+ u64 free_elt_as_u64 = h->freelists[i];
- free_elt = (void *) (uword) h->freelists[i];
- while (free_elt)
+ while (free_elt_as_u64)
{
+ free_elt = BV (clib_bihash_get_value) (h, free_elt_as_u64);
nfree++;
- free_elt = (void *) (uword) free_elt->next_free_as_u64;
+ free_elt_as_u64 = free_elt->next_free_as_u64;
}
if (nfree || verbose)
}
s = format (s, " %lld linear search buckets\n", linear_buckets);
- used_bytes = alloc_arena_next (h) - alloc_arena (h);
+ used_bytes = alloc_arena_next (h);
s = format (s,
" arena: base %llx, next %llx\n"
" used %lld b (%lld Mbytes) of %lld b (%lld Mbytes)\n",
}
void BV (clib_bihash_foreach_key_value_pair)
- (BVT (clib_bihash) * h, void *callback, void *arg)
+ (BVT (clib_bihash) * h,
+ BV (clib_bihash_foreach_key_value_pair_cb) cb, void *arg)
{
int i, j, k;
BVT (clib_bihash_bucket) * b;
BVT (clib_bihash_value) * v;
- void (*fp) (BVT (clib_bihash_kv) *, void *) = callback;
+
+ if (PREDICT_FALSE (alloc_arena (h) == 0))
+ return;
for (i = 0; i < h->nbuckets; i++)
{
if (BV (clib_bihash_is_free) (&v->kvp[k]))
continue;
- (*fp) (&v->kvp[k], arg);
+ if (BIHASH_WALK_STOP == cb (&v->kvp[k], arg))
+ return;
/*
* In case the callback deletes the last entry in the bucket...
*/
Code Review / vpp.git / blobdiff