summaryrefslogtreecommitdiffstats
path: root/src/vppinfra/pfhash.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/vppinfra/pfhash.c')
-rw-r--r--src/vppinfra/pfhash.c689
1 files changed, 0 insertions, 689 deletions
diff --git a/src/vppinfra/pfhash.c b/src/vppinfra/pfhash.c
deleted file mode 100644
index 3b9fa8f34aa..00000000000
--- a/src/vppinfra/pfhash.c
+++ /dev/null
@@ -1,689 +0,0 @@
-/*
- Copyright (c) 2013 Cisco and/or its affiliates.
-
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
-*/
-
-#include <vppinfra/pfhash.h>
-#include <vppinfra/format.h>
-
-/* This is incredibly handy when debugging */
-u32 vl (void *v) __attribute__ ((weak));
-u32
-vl (void *v)
-{
- return vec_len (v);
-}
-
-#if defined(CLIB_HAVE_VEC128) && ! defined (__ALTIVEC__)
-
-typedef struct
-{
- u8 *key[16];
- u64 value;
-} pfhash_show_t;
-
-static int
-sh_compare (pfhash_show_t * sh0, pfhash_show_t * sh1)
-{
- return ((i32) (sh0->value) - ((i32) sh1->value));
-}
-
-u8 *
-format_pfhash (u8 * s, va_list * args)
-{
- pfhash_t *p = va_arg (*args, pfhash_t *);
- int verbose = va_arg (*args, int);
-
- if (p == 0 || p->overflow_hash == 0 || p->buckets == 0)
- {
- s = format (s, "*** uninitialized ***");
- return s;
- }
-
- s = format (s, "Prefetch hash '%s'\n", p->name);
- s =
- format (s, " %d buckets, %u bucket overflows, %.1f%% bucket overflow \n",
- vec_len (p->buckets), p->overflow_count,
- 100.0 * ((f64) p->overflow_count) / ((f64) vec_len (p->buckets)));
- if (p->nitems)
- s =
- format (s,
- " %u items, %u items in overflow, %.1f%% items in overflow\n",
- p->nitems, p->nitems_in_overflow,
- 100.0 * ((f64) p->nitems_in_overflow) / ((f64) p->nitems));
-
- if (verbose)
- {
- pfhash_show_t *shs = 0, *sh;
- hash_pair_t *hp;
- int i, j;
-
- for (i = 0; i < vec_len (p->buckets); i++)
- {
- pfhash_kv_t *kv;
- pfhash_kv_16_t *kv16;
- pfhash_kv_8_t *kv8;
- pfhash_kv_8v8_t *kv8v8;
- pfhash_kv_4_t *kv4;
-
- if (p->buckets[i] == 0 || p->buckets[i] == PFHASH_BUCKET_OVERFLOW)
- continue;
-
- kv = pool_elt_at_index (p->kvp, p->buckets[i]);
-
- switch (p->key_size)
- {
- case 16:
- kv16 = &kv->kv16;
- for (j = 0; j < 3; j++)
- {
- if (kv16->values[j] != (u32) ~ 0)
- {
- vec_add2 (shs, sh, 1);
- clib_memcpy (sh->key, &kv16->kb.k_u32x4[j],
- p->key_size);
- sh->value = kv16->values[j];
- }
- }
- break;
- case 8:
- if (p->value_size == 4)
- {
- kv8 = &kv->kv8;
- for (j = 0; j < 5; j++)
- {
- if (kv8->values[j] != (u32) ~ 0)
- {
- vec_add2 (shs, sh, 1);
- clib_memcpy (sh->key, &kv8->kb.k_u64[j],
- p->key_size);
- sh->value = kv8->values[j];
- }
- }
- }
- else
- {
- kv8v8 = &kv->kv8v8;
- for (j = 0; j < 4; j++)
- {
- if (kv8v8->values[j] != (u64) ~ 0)
- {
- vec_add2 (shs, sh, 1);
- clib_memcpy (sh->key, &kv8v8->kb.k_u64[j],
- p->key_size);
- sh->value = kv8v8->values[j];
- }
- }
-
- }
- break;
- case 4:
- kv4 = &kv->kv4;
- for (j = 0; j < 8; j++)
- {
- if (kv4->values[j] != (u32) ~ 0)
- {
- vec_add2 (shs, sh, 1);
- clib_memcpy (sh->key, &kv4->kb.kb[j], p->key_size);
- sh->value = kv4->values[j];
- }
- }
- break;
- }
- }
-
- /* *INDENT-OFF* */
- hash_foreach_pair (hp, p->overflow_hash,
- ({
- vec_add2 (shs, sh, 1);
- clib_memcpy (sh->key, (u8 *)hp->key, p->key_size);
- sh->value = hp->value[0];
- }));
- /* *INDENT-ON* */
-
- vec_sort_with_function (shs, sh_compare);
-
- for (i = 0; i < vec_len (shs); i++)
- {
- sh = vec_elt_at_index (shs, i);
- s = format (s, " %U value %u\n", format_hex_bytes, sh->key,
- p->key_size, sh->value);
- }
- vec_free (shs);
- }
- return s;
-}
-
-
-void abort (void);
-
-void
-pfhash_init (pfhash_t * p, char *name, u32 key_size, u32 value_size,
- u32 nbuckets)
-{
- pfhash_kv_t *kv;
- memset (p, 0, sizeof (*p));
- u32 key_bytes;
-
- switch (key_size)
- {
- case 4:
- key_bytes = 4;
- break;
- case 8:
- key_bytes = 8;
- break;
- case 16:
- key_bytes = 16;
- break;
- default:
- ASSERT (0);
- abort ();
- }
-
- switch (value_size)
- {
- case 4:
- case 8:
- break;
- default:
- ASSERT (0);
- abort ();
- }
-
-
- p->name = format (0, "%s", name);
- vec_add1 (p->name, 0);
- p->overflow_hash = hash_create_mem (0, key_bytes, sizeof (uword));
-
- nbuckets = 1 << (max_log2 (nbuckets));
-
- /* This sets the entire bucket array to zero */
- vec_validate (p->buckets, nbuckets - 1);
- p->key_size = key_size;
- p->value_size = value_size;
-
- /*
- * Unset buckets implicitly point at the 0th pool elt.
- * All search routines will return ~0 if they go there.
- */
- pool_get_aligned (p->kvp, kv, 16);
- memset (kv, 0xff, sizeof (*kv));
-}
-
-static pfhash_kv_16_t *
-pfhash_get_kv_16 (pfhash_t * p, u32 bucket_contents,
- u32x4 * key, u32 * match_index)
-{
- u32x4 diff[3];
- u32 is_equal[3];
- pfhash_kv_16_t *kv = 0;
-
- *match_index = (u32) ~ 0;
-
- kv = &p->kvp[bucket_contents].kv16;
-
- diff[0] = u32x4_sub (kv->kb.k_u32x4[0], key[0]);
- diff[1] = u32x4_sub (kv->kb.k_u32x4[1], key[0]);
- diff[2] = u32x4_sub (kv->kb.k_u32x4[2], key[0]);
-
- is_equal[0] = u32x4_zero_byte_mask (diff[0]) == 0xffff;
- is_equal[1] = u32x4_zero_byte_mask (diff[1]) == 0xffff;
- is_equal[2] = u32x4_zero_byte_mask (diff[2]) == 0xffff;
-
- if (is_equal[0])
- *match_index = 0;
- if (is_equal[1])
- *match_index = 1;
- if (is_equal[2])
- *match_index = 2;
-
- return kv;
-}
-
-static pfhash_kv_8_t *
-pfhash_get_kv_8 (pfhash_t * p, u32 bucket_contents,
- u64 * key, u32 * match_index)
-{
- pfhash_kv_8_t *kv;
-
- *match_index = (u32) ~ 0;
-
- kv = &p->kvp[bucket_contents].kv8;
-
- if (kv->kb.k_u64[0] == key[0])
- *match_index = 0;
- if (kv->kb.k_u64[1] == key[0])
- *match_index = 1;
- if (kv->kb.k_u64[2] == key[0])
- *match_index = 2;
- if (kv->kb.k_u64[3] == key[0])
- *match_index = 3;
- if (kv->kb.k_u64[4] == key[0])
- *match_index = 4;
-
- return kv;
-}
-
-static pfhash_kv_8v8_t *
-pfhash_get_kv_8v8 (pfhash_t * p,
- u32 bucket_contents, u64 * key, u32 * match_index)
-{
- pfhash_kv_8v8_t *kv;
-
- *match_index = (u32) ~ 0;
-
- kv = &p->kvp[bucket_contents].kv8v8;
-
- if (kv->kb.k_u64[0] == key[0])
- *match_index = 0;
- if (kv->kb.k_u64[1] == key[0])
- *match_index = 1;
- if (kv->kb.k_u64[2] == key[0])
- *match_index = 2;
- if (kv->kb.k_u64[3] == key[0])
- *match_index = 3;
-
- return kv;
-}
-
-static pfhash_kv_4_t *
-pfhash_get_kv_4 (pfhash_t * p, u32 bucket_contents,
- u32 * key, u32 * match_index)
-{
- u32x4 vector_key;
- u32x4 is_equal[2];
- u32 zbm[2], winner_index;
- pfhash_kv_4_t *kv;
-
- *match_index = (u32) ~ 0;
-
- kv = &p->kvp[bucket_contents].kv4;
-
- vector_key = u32x4_splat (key[0]);
-
- is_equal[0] = u32x4_is_equal (kv->kb.k_u32x4[0], vector_key);
- is_equal[1] = u32x4_is_equal (kv->kb.k_u32x4[1], vector_key);
- zbm[0] = ~u32x4_zero_byte_mask (is_equal[0]) & 0xFFFF;
- zbm[1] = ~u32x4_zero_byte_mask (is_equal[1]) & 0xFFFF;
-
- if (PREDICT_FALSE ((zbm[0] == 0) && (zbm[1] == 0)))
- return kv;
-
- winner_index = min_log2 (zbm[0]) >> 2;
- winner_index = zbm[1] ? (4 + (min_log2 (zbm[1]) >> 2)) : winner_index;
-
- *match_index = winner_index;
- return kv;
-}
-
-static pfhash_kv_t *
-pfhash_get_internal (pfhash_t * p, u32 bucket_contents,
- void *key, u32 * match_index)
-{
- pfhash_kv_t *kv = 0;
-
- switch (p->key_size)
- {
- case 16:
- kv =
- (pfhash_kv_t *) pfhash_get_kv_16 (p, bucket_contents, key,
- match_index);
- break;
- case 8:
- if (p->value_size == 4)
- kv = (pfhash_kv_t *) pfhash_get_kv_8 (p, bucket_contents,
- key, match_index);
- else
- kv = (pfhash_kv_t *) pfhash_get_kv_8v8 (p, bucket_contents,
- key, match_index);
- break;
- case 4:
- kv =
- (pfhash_kv_t *) pfhash_get_kv_4 (p, bucket_contents, key,
- match_index);
- break;
- default:
- ASSERT (0);
- }
- return kv;
-}
-
-u64
-pfhash_get (pfhash_t * p, u32 bucket, void *key)
-{
- pfhash_kv_t *kv;
- u32 match_index = ~0;
- pfhash_kv_16_t *kv16;
- pfhash_kv_8_t *kv8;
- pfhash_kv_8v8_t *kv8v8;
- pfhash_kv_4_t *kv4;
-
- u32 bucket_contents = pfhash_read_bucket_prefetch_kv (p, bucket);
-
- if (bucket_contents == PFHASH_BUCKET_OVERFLOW)
- {
- uword *hp;
-
- hp = hash_get_mem (p->overflow_hash, key);
- if (hp)
- return hp[0];
- return (u64) ~ 0;
- }
-
- kv = pfhash_get_internal (p, bucket_contents, key, &match_index);
- if (match_index == (u32) ~ 0)
- return (u64) ~ 0;
-
- kv16 = (void *) kv;
- kv8 = (void *) kv;
- kv4 = (void *) kv;
- kv8v8 = (void *) kv;
-
- switch (p->key_size)
- {
- case 16:
- return (kv16->values[match_index] == (u32) ~ 0)
- ? (u64) ~ 0 : (u64) kv16->values[match_index];
- case 8:
- if (p->value_size == 4)
- return (kv8->values[match_index] == (u32) ~ 0)
- ? (u64) ~ 0 : (u64) kv8->values[match_index];
- else
- return kv8v8->values[match_index];
- case 4:
- return (kv4->values[match_index] == (u32) ~ 0)
- ? (u64) ~ 0 : (u64) kv4->values[match_index];
- default:
- ASSERT (0);
- }
- return (u64) ~ 0;
-}
-
-void
-pfhash_set (pfhash_t * p, u32 bucket, void *key, void *value)
-{
- u32 bucket_contents = pfhash_read_bucket_prefetch_kv (p, bucket);
- u32 match_index = (u32) ~ 0;
- pfhash_kv_t *kv;
- pfhash_kv_16_t *kv16;
- pfhash_kv_8_t *kv8;
- pfhash_kv_8v8_t *kv8v8;
- pfhash_kv_4_t *kv4;
- int i;
- u8 *kcopy;
-
- if (bucket_contents == PFHASH_BUCKET_OVERFLOW)
- {
- hash_pair_t *hp;
- hp = hash_get_pair_mem (p->overflow_hash, key);
- if (hp)
- {
- clib_warning ("replace value 0x%08x with value 0x%08x",
- hp->value[0], (u64) value);
- hp->value[0] = (u64) value;
- return;
- }
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, key, p->key_size);
- hash_set_mem (p->overflow_hash, kcopy, value);
- p->nitems++;
- p->nitems_in_overflow++;
- return;
- }
-
- if (bucket_contents == 0)
- {
- pool_get_aligned (p->kvp, kv, 16);
- memset (kv, 0xff, sizeof (*kv));
- p->buckets[bucket] = kv - p->kvp;
- }
- else
- kv = pfhash_get_internal (p, bucket_contents, key, &match_index);
-
- kv16 = (void *) kv;
- kv8 = (void *) kv;
- kv8v8 = (void *) kv;
- kv4 = (void *) kv;
-
- p->nitems++;
-
- if (match_index != (u32) ~ 0)
- {
- switch (p->key_size)
- {
- case 16:
- kv16->values[match_index] = (u32) (u64) value;
- return;
-
- case 8:
- if (p->value_size == 4)
- kv8->values[match_index] = (u32) (u64) value;
- else
- kv8v8->values[match_index] = (u64) value;
- return;
-
- case 4:
- kv4->values[match_index] = (u64) value;
- return;
-
- default:
- ASSERT (0);
- }
- }
-
- switch (p->key_size)
- {
- case 16:
- for (i = 0; i < 3; i++)
- {
- if (kv16->values[i] == (u32) ~ 0)
- {
- clib_memcpy (&kv16->kb.k_u32x4[i], key, p->key_size);
- kv16->values[i] = (u32) (u64) value;
- return;
- }
- }
- /* copy bucket contents to overflow hash tbl */
- for (i = 0; i < 3; i++)
- {
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, &kv16->kb.k_u32x4[i], p->key_size);
- hash_set_mem (p->overflow_hash, kcopy, kv16->values[i]);
- p->nitems_in_overflow++;
- }
- /* Add new key to overflow */
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, key, p->key_size);
- hash_set_mem (p->overflow_hash, kcopy, value);
- p->buckets[bucket] = PFHASH_BUCKET_OVERFLOW;
- p->overflow_count++;
- p->nitems_in_overflow++;
- return;
-
- case 8:
- if (p->value_size == 4)
- {
- for (i = 0; i < 5; i++)
- {
- if (kv8->values[i] == (u32) ~ 0)
- {
- clib_memcpy (&kv8->kb.k_u64[i], key, 8);
- kv8->values[i] = (u32) (u64) value;
- return;
- }
- }
- /* copy bucket contents to overflow hash tbl */
- for (i = 0; i < 5; i++)
- {
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, &kv8->kb.k_u64[i], 8);
- hash_set_mem (p->overflow_hash, kcopy, kv8->values[i]);
- p->nitems_in_overflow++;
- }
- }
- else
- {
- for (i = 0; i < 4; i++)
- {
- if (kv8v8->values[i] == (u64) ~ 0)
- {
- clib_memcpy (&kv8v8->kb.k_u64[i], key, 8);
- kv8v8->values[i] = (u64) value;
- return;
- }
- }
- /* copy bucket contents to overflow hash tbl */
- for (i = 0; i < 4; i++)
- {
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, &kv8v8->kb.k_u64[i], 8);
- hash_set_mem (p->overflow_hash, kcopy, kv8v8->values[i]);
- p->nitems_in_overflow++;
- }
-
- }
- /* Add new key to overflow */
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, key, p->key_size);
- hash_set_mem (p->overflow_hash, kcopy, value);
- p->buckets[bucket] = PFHASH_BUCKET_OVERFLOW;
- p->overflow_count++;
- p->nitems_in_overflow++;
- return;
-
- case 4:
- for (i = 0; i < 8; i++)
- {
- if (kv4->values[i] == (u32) ~ 0)
- {
- clib_memcpy (&kv4->kb.kb[i], key, 4);
- kv4->values[i] = (u32) (u64) value;
- return;
- }
- }
- /* copy bucket contents to overflow hash tbl */
- for (i = 0; i < 8; i++)
- {
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, &kv4->kb.kb[i], 4);
- hash_set_mem (p->overflow_hash, kcopy, kv4->values[i]);
- p->nitems_in_overflow++;
- }
- /* Add new key to overflow */
- kcopy = clib_mem_alloc (p->key_size);
- clib_memcpy (kcopy, key, p->key_size);
- hash_set_mem (p->overflow_hash, kcopy, value);
- p->buckets[bucket] = PFHASH_BUCKET_OVERFLOW;
- p->overflow_count++;
- p->nitems_in_overflow++;
- return;
-
- default:
- ASSERT (0);
- }
-}
-
-void
-pfhash_unset (pfhash_t * p, u32 bucket, void *key)
-{
- u32 bucket_contents = pfhash_read_bucket_prefetch_kv (p, bucket);
- u32 match_index = (u32) ~ 0;
- pfhash_kv_t *kv;
- pfhash_kv_16_t *kv16;
- pfhash_kv_8_t *kv8;
- pfhash_kv_8v8_t *kv8v8;
- pfhash_kv_4_t *kv4;
- void *oldkey;
-
- if (bucket_contents == PFHASH_BUCKET_OVERFLOW)
- {
- hash_pair_t *hp;
- hp = hash_get_pair_mem (p->overflow_hash, key);
- if (hp)
- {
- oldkey = (void *) hp->key;
- hash_unset_mem (p->overflow_hash, key);
- clib_mem_free (oldkey);
- p->nitems--;
- p->nitems_in_overflow--;
- }
- return;
- }
-
- kv = pfhash_get_internal (p, bucket_contents, key, &match_index);
- if (match_index == (u32) ~ 0)
- return;
-
- p->nitems--;
-
- kv16 = (void *) kv;
- kv8 = (void *) kv;
- kv8v8 = (void *) kv;
- kv4 = (void *) kv;
-
- switch (p->key_size)
- {
- case 16:
- kv16->values[match_index] = (u32) ~ 0;
- return;
-
- case 8:
- if (p->value_size == 4)
- kv8->values[match_index] = (u32) ~ 0;
- else
- kv8v8->values[match_index] = (u64) ~ 0;
- return;
-
- case 4:
- kv4->values[match_index] = (u32) ~ 0;
- return;
-
- default:
- ASSERT (0);
- }
-}
-
-void
-pfhash_free (pfhash_t * p)
-{
- hash_pair_t *hp;
- int i;
- u8 **keys = 0;
-
- vec_free (p->name);
-
- pool_free (p->kvp);
-
- /* *INDENT-OFF* */
- hash_foreach_pair (hp, p->overflow_hash,
- ({
- vec_add1 (keys, (u8 *)hp->key);
- }));
- /* *INDENT-ON* */
- hash_free (p->overflow_hash);
- for (i = 0; i < vec_len (keys); i++)
- vec_free (keys[i]);
- vec_free (keys);
-}
-
-#endif
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */