/* * 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. */ #include <vppinfra/time.h> #include <vppinfra/cache.h> #include <vppinfra/error.h> #include <vppinfra/heap.h> #include <vppinfra/format.h> #include <vppinfra/random.h> #include <vppinfra/hash.h> #include <vppinfra/flowhash_8_8.h> /* Not actually tested here. But included for compilation purposes. */ #include <vppinfra/flowhash_24_16.h> typedef struct { u64 seed; u32 fixed_entries; u32 collision_buckets; u32 nitems; u32 iterations; u32 prefetch; int non_random_keys; uword *key_hash; flowhash_lkey_8_8_t *keys; flowhash_8_8_t *hash; clib_time_t clib_time; unformat_input_t *input; } test_main_t; test_main_t test_main; static clib_error_t * test_flowhash (test_main_t * tm) { f64 before, delta; u64 total; u32 overflow; int i, j; uword *p; tm->hash = flowhash_alloc_8_8 (tm->fixed_entries, tm->collision_buckets); if (tm->hash == NULL) return clib_error_return (0, "Could not alloc hash"); fformat (stdout, "Allocated hash memory size: %llu\n", flowhash_memory_size (tm->hash)); fformat (stdout, "Pick %lld unique %s keys...\n", tm->nitems, tm->non_random_keys ? "non-random" : "random"); for (i = 0; i < tm->nitems; i++) { flowhash_lkey_8_8_t rndkey; if (tm->non_random_keys == 0) { again: rndkey.as_u64[0] = random_u64 (&tm->seed); if ((p = hash_get (tm->key_hash, rndkey.as_u64[0]))) goto again; } else rndkey.as_u64[0] = (u64) (i + 1) << 16; hash_set (tm->key_hash, rndkey.as_u64[0], i + 1); vec_add1 (tm->keys, rndkey); } hash_free (tm->key_hash); /* Additions */ overflow = 0; before = clib_time_now (&tm->clib_time); fformat (stdout, "Adding %u items...\n", tm->nitems); for (i = 0; i < tm->nitems; i++) { u32 hash = flowhash_hash_8_8 (&tm->keys[i]); u32 ei; flowhash_get_8_8 (tm->hash, &tm->keys[i], hash, 1, &ei); if (flowhash_is_overflow (ei)) overflow++; /* Set value (No matter if success) */ flowhash_value (tm->hash, ei)->as_u64[0] = i + 1; /* Save value until time > 1 */ flowhash_timeout (tm->hash, ei) = 1; } delta = clib_time_now (&tm->clib_time) - before; total = tm->nitems; fformat (stdout, "%lld additions in %.6f seconds\n", total, delta); if (delta > 0) fformat (stdout, "%.f additions per second\n", ((f64) total) / delta); fformat (stdout, "%u elements in table\n", flowhash_elts_8_8 (tm->hash, 1)); fformat (stdout, "Flowhash counters:\n"); fformat (stdout, " collision-lookup: %lu\n", tm->hash->collision_lookup_counter); fformat (stdout, " not-enough-buckets: %lu\n", tm->hash->not_enough_buckets_counter); fformat (stdout, " overflows: %lu\n", overflow); /* Lookups (very similar to additions) */ overflow = 0; before = clib_time_now (&tm->clib_time); fformat (stdout, "Looking up %u items %u times...\n", tm->nitems, tm->iterations); for (j = 0; j < tm->iterations; j++) { i = 0; if (tm->prefetch) for (; i < tm->nitems - tm->prefetch; i++) { u32 ei; u32 hash = flowhash_hash_8_8 (&tm->keys[i + tm->prefetch]); flowhash_prefetch (tm->hash, hash); hash = flowhash_hash_8_8 (&tm->keys[i]); flowhash_get_8_8 (tm->hash, &tm->keys[i], hash, 1, &ei); if (flowhash_is_overflow (ei)) overflow++; else if (flowhash_timeout (tm->hash, ei) != 1) clib_warning ("Key not found: %lld\n", tm->keys[i].as_u64[0]); else if (flowhash_value (tm->hash, ei)->as_u64[0] != i + 1) clib_warning ("Value mismatch for key %lld\n", tm->keys[i].as_u64[0]); } for (; i < tm->nitems; i++) { u32 ei; u32 hash = flowhash_hash_8_8 (&tm->keys[i]); flowhash_get_8_8 (tm->hash, &tm->keys[i], hash, 1, &ei); if (flowhash_is_overflow (ei)) overflow++; else if (flowhash_timeout (tm->hash, ei) != 1) clib_warning ("Key not found: %lld\n", tm->keys[i].as_u64[0]); else if (flowhash_value (tm->hash, ei)->as_u64[0] != i + 1) clib_warning ("Value mismatch for key %lld\n", tm->keys[i].as_u64[0]); } } delta = clib_time_now (&tm->clib_time) - before; total = tm->nitems * tm->iterations; fformat (stdout, "%lld lookups in %.6f seconds\n", total, delta); if (delta > 0) fformat (stdout, "%.f lookups per second\n", ((f64) total) / delta); /* Delete */ for (i = 0; i < tm->nitems; i++) { u32 hash = flowhash_hash_8_8 (&tm->keys[i]); u32 ei; flowhash_get_8_8 (tm->hash, &tm->keys[i], hash, 1, &ei); flowhash_timeout (tm->hash, ei) = 0; } fformat (stdout, "%u elements in table\n", flowhash_elts_8_8 (tm->hash, 1)); vec_free (tm->keys); flowhash_free_8_8 (tm->hash); return NULL; } clib_error_t * test_flowhash_main (test_main_t * tm) { unformat_input_t *i = tm->input; clib_error_t *error; while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) { if (unformat (i, "seed %u", &tm->seed)) ; else if (unformat (i, "fixed-entries %d", &tm->fixed_entries)) ; else if (unformat (i, "collision-buckets %d", &tm->collision_buckets)) ; else if (unformat (i, "non-random-keys")) tm->non_random_keys = 1; else if (unformat (i, "nitems %d", &tm->nitems)) ; else if (unformat (i, "prefetch %d", &tm->prefetch)) ; else if (unformat (i, "iterations %d", &tm->iterations)) ; else return clib_error_return (0, "unknown input '%U'", format_unformat_error, i); } error = test_flowhash (tm); return error; } #ifdef CLIB_UNIX int main (int argc, char *argv[]) { unformat_input_t i; clib_error_t *error; test_main_t *tm = &test_main; clib_mem_init (0, 3ULL << 30); tm->fixed_entries = 8 << 20; tm->collision_buckets = 1 << 20; tm->seed = 0xdeadf00l; tm->iterations = 1; tm->input = &i; tm->nitems = 1000; tm->non_random_keys = 0; tm->key_hash = hash_create (0, sizeof (uword)); tm->prefetch = 0; clib_time_init (&tm->clib_time); unformat_init_command_line (&i, argv); error = test_flowhash_main (tm); unformat_free (&i); if (error) { clib_error_report (error); return 1; } return 0; return 0; } #endif /* CLIB_UNIX */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */