16e4a4a0ae
Template instances can allocate BIHASH_KVP_PER_PAGE data records tangent to the bucket, to remove a dependent read / prefetch. Template instances can ask for immediate memory allocation, to avoid several branches in the lookup path. Clean up l2 fib, gpb plugin codes: use clib_bihash_get_bucket(...) Use hugepages for bihash allocation arenas Type: improvement Signed-off-by: Dave Barach <dave@barachs.net> Signed-off-by: Damjan Marion <damarion@cisco.com> Change-Id: I92fc11bc58e48d84e2d61f44580916dd1c56361c
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
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* Copyright (c) 2016 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#undef BIHASH_TYPE
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#undef BIHASH_KVP_PER_PAGE
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#undef BIHASH_32_64_SVM
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#undef BIHASH_ENABLE_STATS
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#undef BIHASH_KVP_AT_BUCKET_LEVEL
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#undef BIHASH_LAZY_INSTANTIATE
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#undef BIHASH_BUCKET_PREFETCH_CACHE_LINES
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#define BIHASH_TYPE _48_8
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#define BIHASH_KVP_PER_PAGE 4
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#define BIHASH_KVP_AT_BUCKET_LEVEL 0
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#define BIHASH_LAZY_INSTANTIATE 1
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#define BIHASH_BUCKET_PREFETCH_CACHE_LINES 1
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#ifndef __included_bihash_48_8_h__
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#define __included_bihash_48_8_h__
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#include <vppinfra/crc32.h>
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#include <vppinfra/heap.h>
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#include <vppinfra/format.h>
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#include <vppinfra/pool.h>
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#include <vppinfra/xxhash.h>
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typedef struct
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{
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u64 key[6];
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u64 value;
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} clib_bihash_kv_48_8_t;
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static inline int
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clib_bihash_is_free_48_8 (const clib_bihash_kv_48_8_t * v)
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{
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/* Free values are clib_memset to 0xff, check a bit... */
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if (v->key[0] == ~0ULL && v->value == ~0ULL)
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return 1;
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return 0;
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}
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static inline u64
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clib_bihash_hash_48_8 (const clib_bihash_kv_48_8_t * v)
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{
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#ifdef clib_crc32c_uses_intrinsics
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return clib_crc32c ((u8 *) v->key, 48);
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#else
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u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4]
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^ v->key[5];
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return clib_xxhash (tmp);
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#endif
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}
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static inline u8 *
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format_bihash_kvp_48_8 (u8 * s, va_list * args)
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{
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clib_bihash_kv_48_8_t *v = va_arg (*args, clib_bihash_kv_48_8_t *);
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s = format (s, "key %llu %llu %llu %llu %llu %llu value %llu", v->key[0],
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v->key[1], v->key[2], v->key[3], v->key[4], v->key[5],
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v->value);
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return s;
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}
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static inline int
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clib_bihash_key_compare_48_8 (u64 * a, u64 * b)
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{
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#if defined (CLIB_HAVE_VEC512)
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u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
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return (u64x8_is_zero_mask (v) & 0x3f) == 0;
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#elif defined (CLIB_HAVE_VEC256)
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u64x4 v = { 0 };
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v = u64x4_insert_lo (v, u64x2_load_unaligned (a + 4) ^
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u64x2_load_unaligned (b + 4));
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v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
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return u64x4_is_all_zero (v);
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#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
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u64x2 v;
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v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
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v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
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v |= u64x2_load_unaligned (a + 4) ^ u64x2_load_unaligned (b + 4);
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return u64x2_is_all_zero (v);
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#else
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return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
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| (a[4] ^ b[4]) | (a[5] ^ b[5])) == 0;
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#endif
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}
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#undef __included_bihash_template_h__
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#include <vppinfra/bihash_template.h>
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#endif /* __included_bihash_48_8_h__ */
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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