Add bihash statistics hook
Example / unit-test in .../src/plugins/unittest/bihash_test.c
Change-Id: I23fd0ba742d65291667a755965aee1a3d3477ca2
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vppinfra/bihash_8_8_stats.h b/src/vppinfra/bihash_8_8_stats.h
new file mode 100644
index 0000000..a6c947a
--- /dev/null
+++ b/src/vppinfra/bihash_8_8_stats.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+#undef BIHASH_TYPE
+#undef BIHASH_KVP_PER_PAGE
+#undef BIHASH_32_64_SVM
+#undef BIHASH_ENABLE_STATS
+
+#define BIHASH_TYPE _8_8_stats
+#define BIHASH_KVP_PER_PAGE 4
+#define BIHASH_ENABLE_STATS 1
+
+#ifndef __included_bihash_8_8_stats_h__
+#define __included_bihash_8_8__stats_h__
+
+#include <vppinfra/heap.h>
+#include <vppinfra/format.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/xxhash.h>
+#include <vppinfra/crc32.h>
+
+/** 8 octet key, 8 octet key value pair */
+typedef struct
+{
+ u64 key; /**< the key */
+ u64 value; /**< the value */
+} clib_bihash_kv_8_8_stats_t;
+
+/** Decide if a clib_bihash_kv_8_8_t instance is free
+ @param v- pointer to the (key,value) pair
+*/
+static inline int
+clib_bihash_is_free_8_8_stats (clib_bihash_kv_8_8_stats_t * v)
+{
+ if (v->key == ~0ULL && v->value == ~0ULL)
+ return 1;
+ return 0;
+}
+
+/** Hash a clib_bihash_kv_8_8_t instance
+ @param v - pointer to the (key,value) pair, hash the key (only)
+*/
+static inline u64
+clib_bihash_hash_8_8_stats (clib_bihash_kv_8_8_stats_t * v)
+{
+ /* Note: to torture-test linear scan, make this fn return a constant */
+#ifdef clib_crc32c_uses_intrinsics
+ return clib_crc32c ((u8 *) & v->key, 8);
+#else
+ return clib_xxhash (v->key);
+#endif
+}
+
+/** Format a clib_bihash_kv_8_8_t instance
+ @param s - u8 * vector under construction
+ @param args (vararg) - the (key,value) pair to format
+ @return s - the u8 * vector under construction
+*/
+static inline u8 *
+format_bihash_kvp_8_8_stats (u8 * s, va_list * args)
+{
+ clib_bihash_kv_8_8_stats_t *v =
+ va_arg (*args, clib_bihash_kv_8_8_stats_t *);
+
+ s = format (s, "key %llu value %llu", v->key, v->value);
+ return s;
+}
+
+/** Compare two clib_bihash_kv_8_8_t instances
+ @param a - first key
+ @param b - second key
+*/
+static inline int
+clib_bihash_key_compare_8_8_stats (u64 a, u64 b)
+{
+ return a == b;
+}
+
+#undef __included_bihash_template_h__
+#include <vppinfra/bihash_template.h>
+
+#endif /* __included_bihash_8_8_stats_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */