#include "bloom.h"
#include "../hash.h"
#include "../minmax.h"
+#include "../crc/xxhash.h"
+#include "../crc/murmur3.h"
+#include "../crc/crc32c.h"
+#include "../crc/fnv.h"
struct bloom {
uint64_t nentries;
#define BITS_PER_INDEX (sizeof(uint32_t) * 8)
#define BITS_INDEX_MASK (BITS_PER_INDEX - 1)
-static unsigned int jhash_init[] = { 0, 0x12db635, 0x2a4a53 };
-#define N_HASHES 3
+struct bloom_hash {
+ unsigned int seed;
+ uint32_t (*fn)(const void *, uint32_t, uint32_t);
+};
+
+static uint32_t bloom_crc32c(const void *buf, uint32_t len, uint32_t seed)
+{
+ return fio_crc32c(buf, len);
+}
+
+static uint32_t bloom_fnv(const void *buf, uint32_t len, uint32_t seed)
+{
+ return fnv(buf, len, seed);
+}
+
+#define BLOOM_SEED 0x8989
+
+struct bloom_hash hashes[] = {
+ {
+ .seed = BLOOM_SEED,
+ .fn = jhash,
+ },
+ {
+ .seed = BLOOM_SEED,
+ .fn = XXH32,
+ },
+ {
+ .seed = BLOOM_SEED,
+ .fn = murmurhash3,
+ },
+ {
+ .seed = BLOOM_SEED,
+ .fn = bloom_crc32c,
+ },
+ {
+ .seed = BLOOM_SEED,
+ .fn = bloom_fnv,
+ },
+};
+
+#define N_HASHES 5
#define MIN_ENTRIES 1073741824UL
struct bloom *b;
size_t no_uints;
+ crc32c_intel_probe();
+
b = malloc(sizeof(*b));
b->nentries = entries;
no_uints = (entries + BITS_PER_INDEX - 1) / BITS_PER_INDEX;
static int __bloom_check(struct bloom *b, uint32_t *data, unsigned int nwords,
int set)
{
- uint32_t hashes[N_HASHES];
+ uint32_t hash[N_HASHES];
int i, was_set;
- for (i = 0; i < N_HASHES; i++)
- hashes[i] = jhash(data, nwords, jhash_init[i]) % b->nentries;
+ for (i = 0; i < N_HASHES; i++) {
+ hash[i] = hashes[i].fn(data, nwords, hashes[i].seed);
+ hash[i] = hash[i] % b->nentries;
+ }
was_set = 0;
for (i = 0; i < N_HASHES; i++) {
- const unsigned int index = hashes[i] / BITS_PER_INDEX;
- const unsigned int bit = hashes[i] & BITS_INDEX_MASK;
+ const unsigned int index = hash[i] / BITS_PER_INDEX;
+ const unsigned int bit = hash[i] & BITS_INDEX_MASK;
if (b->map[index] & (1U << bit))
was_set++;
return was_set == N_HASHES;
}
-int bloom_check(struct bloom *b, uint32_t *data, unsigned int nwords)
-{
- return __bloom_check(b, data, nwords, 0);
-}
-
int bloom_set(struct bloom *b, uint32_t *data, unsigned int nwords)
{
return __bloom_check(b, data, nwords, 1);