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authorKlement Sekera <ksekera@cisco.com>2017-03-08 05:21:24 +0100
committerDamjan Marion <dmarion.lists@gmail.com>2017-10-20 11:02:33 +0000
commit470a011511a41dcb893df12b33261030717d1e08 (patch)
tree4807109ccd61ceabccc915a8717e89474864f2b8 /src/vppinfra/test_cuckoo_template.c
parent1d35963766490eb98d7776a28a82f5e3f00e24e2 (diff)
add cuckoo hash
Change-Id: I78215041588014e9e5c3599c60471ced610735bb Signed-off-by: Klement Sekera <ksekera@cisco.com>
Diffstat (limited to 'src/vppinfra/test_cuckoo_template.c')
-rw-r--r--src/vppinfra/test_cuckoo_template.c316
1 files changed, 316 insertions, 0 deletions
diff --git a/src/vppinfra/test_cuckoo_template.c b/src/vppinfra/test_cuckoo_template.c
new file mode 100644
index 00000000000..52af38589c8
--- /dev/null
+++ b/src/vppinfra/test_cuckoo_template.c
@@ -0,0 +1,316 @@
+/*
+ * Copyright (c) 2017 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/pool.h>
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/cache.h>
+
+#include <vppinfra/time.h>
+#include <vppinfra/cache.h>
+#include <vppinfra/error.h>
+
+#include <vppinfra/cuckoo_8_8.h>
+#include <vppinfra/cuckoo_template.h>
+#include <vppinfra/cuckoo_template.c>
+
+typedef struct
+{
+ u64 seed;
+ u32 nbuckets;
+ u32 nitems;
+ u32 search_iter;
+ int careful_delete_tests;
+ int verbose;
+ int non_random_keys;
+ uword *key_hash;
+ u64 *keys;
+ CVT (clib_cuckoo) hash;
+ clib_time_t clib_time;
+
+ unformat_input_t *input;
+
+} test_main_t;
+
+test_main_t test_main;
+
+uword
+vl (void *v)
+{
+ return vec_len (v);
+}
+
+void
+do_search (test_main_t * tm, CVT (clib_cuckoo) * h)
+{
+ int i, j;
+ CVT (clib_cuckoo_kv) kv;
+ for (j = 0; j < tm->search_iter; j++)
+ {
+ for (i = 0; i < tm->nitems; i++)
+ {
+ kv.key = tm->keys[i];
+ if (CV (clib_cuckoo_search) (h, &kv, &kv) < 0)
+ if (CV (clib_cuckoo_search) (h, &kv, &kv) < 0)
+ clib_warning ("[%d] search for key %llu failed unexpectedly\n",
+ i, tm->keys[i]);
+ if (kv.value != (u64) (i + 1))
+ clib_warning
+ ("[%d] search for key %llu returned %llu, not %llu\n", i,
+ tm->keys[i], kv.value, (u64) (i + 1));
+ }
+ }
+}
+
+static void
+cb (CVT (clib_cuckoo) * h, void *ctx)
+{
+ fformat (stdout, "Garbage callback called...");
+ if (clib_cpu_time_now () % 3)
+ {
+ fformat (stdout, "collecting garbage...\n");
+ CV (clib_cuckoo_garbage_collect) (h);
+ }
+ else
+ {
+ fformat (stdout, "ignoring for now...\n");
+ }
+}
+
+static clib_error_t *
+test_cuckoo (test_main_t * tm)
+{
+ int i;
+ uword *p;
+ uword total_searches;
+ f64 before, delta;
+ CVT (clib_cuckoo) * h;
+ CVT (clib_cuckoo_kv) kv;
+
+ h = &tm->hash;
+
+ CV (clib_cuckoo_init) (h, "test", tm->nbuckets, cb, NULL);
+
+ fformat (stdout, "Pick %lld unique %s keys...\n", tm->nitems,
+ tm->non_random_keys ? "non-random" : "random");
+
+ for (i = 0; i < tm->nitems; i++)
+ {
+ u64 rndkey;
+
+ if (tm->non_random_keys == 0)
+ {
+
+ again:
+ rndkey = random_u64 (&tm->seed);
+
+ p = hash_get (tm->key_hash, rndkey);
+ if (p)
+ goto again;
+ }
+ else
+ rndkey = (u64) (i + 1) << 16;
+
+ hash_set (tm->key_hash, rndkey, i + 1);
+ vec_add1 (tm->keys, rndkey);
+ }
+
+ fformat (stdout, "Add items...\n");
+ for (i = 0; i < tm->nitems; i++)
+ {
+ kv.key = tm->keys[i];
+ kv.value = i + 1;
+
+ CV (clib_cuckoo_add_del) (h, &kv, 1 /* is_add */ );
+
+ if (tm->verbose > 1)
+ {
+ fformat (stdout, "--------------------\n");
+ fformat (stdout, "After adding key %llu value %lld...\n",
+ tm->keys[i], (u64) (i + 1));
+ fformat (stdout, "%U", CV (format_cuckoo), h,
+ 2 /* very verbose */ );
+ }
+
+ CVT (clib_cuckoo_kv) kv2;
+ int rv = CV (clib_cuckoo_search) (h, &kv, &kv2);
+ ASSERT (CLIB_CUCKOO_ERROR_SUCCESS == rv);
+ }
+
+ fformat (stdout, "%U", CV (format_cuckoo), h, 0 /* very verbose */ );
+
+ fformat (stdout, "Search for items %d times...\n", tm->search_iter);
+
+ before = clib_time_now (&tm->clib_time);
+
+ do_search (tm, h);
+
+ delta = clib_time_now (&tm->clib_time) - before;
+ total_searches = (uword) tm->search_iter * (uword) tm->nitems;
+
+ if (delta > 0)
+ fformat (stdout, "%.f searches per second\n",
+ ((f64) total_searches) / delta);
+
+ fformat (stdout, "%lld searches in %.6f seconds\n", total_searches, delta);
+
+#if 0
+ int j;
+ fformat (stdout, "Standard E-hash search for items %d times...\n",
+ tm->search_iter);
+
+ before = clib_time_now (&tm->clib_time);
+
+ for (j = 0; j < tm->search_iter; j++)
+ {
+ for (i = 0; i < tm->nitems; i++)
+ {
+ p = hash_get (tm->key_hash, tm->keys[i]);
+ if (p == 0 || p[0] != (uword) (i + 1))
+ clib_warning ("ugh, couldn't find %lld\n", tm->keys[i]);
+ }
+ }
+
+ delta = clib_time_now (&tm->clib_time) - before;
+ total_searches = (uword) tm->search_iter * (uword) tm->nitems;
+
+ fformat (stdout, "%lld searches in %.6f seconds\n", total_searches, delta);
+
+ if (delta > 0)
+ fformat (stdout, "%.f searches per second\n",
+ ((f64) total_searches) / delta);
+
+#endif
+ fformat (stdout, "Delete items...\n");
+
+ for (i = 0; i < tm->nitems; i++)
+ {
+ int j;
+ int rv;
+
+ kv.key = tm->keys[i];
+ kv.value = (u64) (i + 1);
+ rv = CV (clib_cuckoo_add_del) (h, &kv, 0 /* is_add */ );
+
+ if (rv < 0)
+ clib_warning ("delete key %lld not ok but should be", tm->keys[i]);
+
+ if (tm->careful_delete_tests)
+ {
+ for (j = 0; j < tm->nitems; j++)
+ {
+ kv.key = tm->keys[j];
+ rv = CV (clib_cuckoo_search) (h, &kv, &kv);
+ if (j <= i && rv >= 0)
+ {
+ clib_warning
+ ("i %d j %d search ok but should not be, value %lld", i,
+ j, kv.value);
+ }
+ if (j > i && rv < 0)
+ {
+ clib_warning ("i %d j %d search not ok but should be", i,
+ j);
+ }
+ }
+ }
+ }
+
+ fformat (stdout, "After deletions, should be empty...\n");
+
+ fformat (stdout, "%U", CV (format_cuckoo), h, 0 /* very verbose */ );
+ return 0;
+}
+
+clib_error_t *
+test_cuckoo_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, "nbuckets %d", &tm->nbuckets))
+ ;
+ else if (unformat (i, "non-random-keys"))
+ tm->non_random_keys = 1;
+ else if (unformat (i, "nitems %d", &tm->nitems))
+ ;
+ else if (unformat (i, "careful %d", &tm->careful_delete_tests))
+ ;
+ else if (unformat (i, "verbose %d", &tm->verbose))
+ ;
+ else if (unformat (i, "search %d", &tm->search_iter))
+ ;
+ else if (unformat (i, "verbose"))
+ tm->verbose = 1;
+ else
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, i);
+ }
+
+ error = test_cuckoo (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->input = &i;
+ tm->seed = 0xdeaddabe;
+
+ tm->nbuckets = 2;
+ tm->nitems = 100000;
+ tm->verbose = 1;
+ tm->search_iter = 10000;
+ tm->careful_delete_tests = 0;
+ tm->key_hash = hash_create (0, sizeof (uword));
+ clib_time_init (&tm->clib_time);
+
+ unformat_init_command_line (&i, argv);
+ error = test_cuckoo_main (tm);
+ unformat_free (&i);
+
+ if (error)
+ {
+ clib_error_report (error);
+ return 1;
+ }
+ return 0;
+}
+#endif /* CLIB_UNIX */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */