FD.io VPP  v20.01-48-g3e0dafb74
Vector Packet Processing
bihash_8_8_stats.h
Go to the documentation of this file.
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 #undef BIHASH_TYPE
16 #undef BIHASH_KVP_PER_PAGE
17 #undef BIHASH_32_64_SVM
18 #undef BIHASH_ENABLE_STATS
19 
20 #define BIHASH_TYPE _8_8_stats
21 #define BIHASH_KVP_PER_PAGE 4
22 #define BIHASH_ENABLE_STATS 1
23 
24 #ifndef __included_bihash_8_8_stats_h__
25 #define __included_bihash_8_8__stats_h__
26 
27 #include <vppinfra/heap.h>
28 #include <vppinfra/format.h>
29 #include <vppinfra/pool.h>
30 #include <vppinfra/xxhash.h>
31 #include <vppinfra/crc32.h>
32 
33 /** 8 octet key, 8 octet key value pair */
34 typedef struct
35 {
36  u64 key; /**< the key */
37  u64 value; /**< the value */
39 
40 /** Decide if a clib_bihash_kv_8_8_t instance is free
41  @param v- pointer to the (key,value) pair
42 */
43 static inline int
45 {
46  if (v->key == ~0ULL && v->value == ~0ULL)
47  return 1;
48  return 0;
49 }
50 
51 /** Hash a clib_bihash_kv_8_8_t instance
52  @param v - pointer to the (key,value) pair, hash the key (only)
53 */
54 static inline u64
56 {
57  /* Note: to torture-test linear scan, make this fn return a constant */
58 #ifdef clib_crc32c_uses_intrinsics
59  return clib_crc32c ((u8 *) & v->key, 8);
60 #else
61  return clib_xxhash (v->key);
62 #endif
63 }
64 
65 /** Format a clib_bihash_kv_8_8_t instance
66  @param s - u8 * vector under construction
67  @param args (vararg) - the (key,value) pair to format
68  @return s - the u8 * vector under construction
69 */
70 static inline u8 *
71 format_bihash_kvp_8_8_stats (u8 * s, va_list * args)
72 {
74  va_arg (*args, clib_bihash_kv_8_8_stats_t *);
75 
76  s = format (s, "key %llu value %llu", v->key, v->value);
77  return s;
78 }
79 
80 /** Compare two clib_bihash_kv_8_8_t instances
81  @param a - first key
82  @param b - second key
83 */
84 static inline int
86 {
87  return a == b;
88 }
89 
90 #undef __included_bihash_template_h__
92 
93 #endif /* __included_bihash_8_8_stats_h__ */
94 
95 /*
96  * fd.io coding-style-patch-verification: ON
97  *
98  * Local Variables:
99  * eval: (c-set-style "gnu")
100  * End:
101  */
a
Definition: bitmap.h:538
unsigned long u64
Definition: types.h:89
Fixed length block allocator.
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
static u64 clib_bihash_hash_8_8_stats(clib_bihash_kv_8_8_stats_t *v)
Hash a clib_bihash_kv_8_8_t instance.
8 octet key, 8 octet key value pair
unsigned char u8
Definition: types.h:56
static u8 * format_bihash_kvp_8_8_stats(u8 *s, va_list *args)
Format a clib_bihash_kv_8_8_t instance.
static int clib_bihash_key_compare_8_8_stats(u64 a, u64 b)
Compare two clib_bihash_kv_8_8_t instances.
static int clib_bihash_is_free_8_8_stats(clib_bihash_kv_8_8_stats_t *v)
Decide if a clib_bihash_kv_8_8_t instance is free.