src/vppinfra/test_bihash_template.c - fdio/vpp - Gitiles

 /*
  * 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/bihash_8_8.h>
 #include <vppinfra/bihash_template.h>

 #include <vppinfra/bihash_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;
     BVT (clib_bihash) 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);
 }

 static clib_error_t *
 test_bihash (test_main_t * tm)
 {
   int i, j;
   uword *p;
   uword total_searches;
   f64 before, delta;
   BVT (clib_bihash) * h;
   BVT (clib_bihash_kv) kv;

   h = &tm->hash;

   BV (clib_bihash_init) (h, "test", tm->nbuckets, 3ULL << 30);

   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;

       BV (clib_bihash_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", BV (format_bihash), h,
 		   2 /* very verbose */ );
 	}
     }

   fformat (stdout, "%U", BV (format_bihash), h, 0 /* very verbose */ );

   fformat (stdout, "Search for items %d times...\n", tm->search_iter);

   before = clib_time_now (&tm->clib_time);

   for (j = 0; j < tm->search_iter; j++)
     {
       u64 hash1 = clib_xxhash (tm->keys[0]);

       for (i = 0; i < tm->nitems; i++)
 	{
 	  if (i < (tm->nitems - 3))
 	    {
 	      clib_bihash_bucket_t *b;
 	      BVT (clib_bihash_value) * v;
 	      u64 hash2 = clib_xxhash (tm->keys[i + 3]);
 	      u32 bucket_index = hash2 & (h->nbuckets - 1);
 	      b = &h->buckets[bucket_index];
 	      CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);

 	      bucket_index = hash1 & (h->nbuckets - 1);
 	      b = &h->buckets[bucket_index];
 	      v = BV (clib_bihash_get_value) (h, b->offset);
 	      hash1 >>= h->log2_nbuckets;
 	      hash1 = hash1 & ((1 << b->log2_pages) - 1);
 	      v += hash1;
 	      CLIB_PREFETCH (v, CLIB_CACHE_LINE_BYTES, LOAD);

 	      hash1 = hash2;
 	    }

 	  kv.key = tm->keys[i];
 	  if (BV (clib_bihash_search) (h, &kv, &kv) < 0)
 	    clib_warning ("search for key %lld failed unexpectedly\n",
 			  tm->keys[i]);
 	  if (kv.value != (u64) (i + 1))
 	    clib_warning ("search for key %lld returned %lld, not %lld\n",
 			  tm->keys, kv.value, (u64) (i + 1));
 	}
     }

   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);

   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);

   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 = BV (clib_bihash_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 = BV (clib_bihash_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", BV (format_bihash), h, 0 /* very verbose */ );
   return 0;
 }

 clib_error_t *
 test_bihash_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_bihash (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 = 5;
   tm->verbose = 1;
   tm->search_iter = 1;
   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_bihash_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:
  */
	/*
	* 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/bihash_8_8.h>
	#include <vppinfra/bihash_template.h>

	#include <vppinfra/bihash_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;
	BVT (clib_bihash) 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);
	}

	static clib_error_t *
	test_bihash (test_main_t * tm)
	{
	int i, j;
	uword *p;
	uword total_searches;
	f64 before, delta;
	BVT (clib_bihash) * h;
	BVT (clib_bihash_kv) kv;

	h = &tm->hash;

	BV (clib_bihash_init) (h, "test", tm->nbuckets, 3ULL << 30);

	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;

	BV (clib_bihash_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", BV (format_bihash), h,
	2 /* very verbose */ );
	}
	}

	fformat (stdout, "%U", BV (format_bihash), h, 0 /* very verbose */ );

	fformat (stdout, "Search for items %d times...\n", tm->search_iter);

	before = clib_time_now (&tm->clib_time);

	for (j = 0; j < tm->search_iter; j++)
	{
	u64 hash1 = clib_xxhash (tm->keys[0]);

	for (i = 0; i < tm->nitems; i++)
	{
	if (i < (tm->nitems - 3))
	{
	clib_bihash_bucket_t *b;
	BVT (clib_bihash_value) * v;
	u64 hash2 = clib_xxhash (tm->keys[i + 3]);
	u32 bucket_index = hash2 & (h->nbuckets - 1);
	b = &h->buckets[bucket_index];
	CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);

	bucket_index = hash1 & (h->nbuckets - 1);
	b = &h->buckets[bucket_index];
	v = BV (clib_bihash_get_value) (h, b->offset);
	hash1 >>= h->log2_nbuckets;
	hash1 = hash1 & ((1 << b->log2_pages) - 1);
	v += hash1;
	CLIB_PREFETCH (v, CLIB_CACHE_LINE_BYTES, LOAD);

	hash1 = hash2;
	}

	kv.key = tm->keys[i];
	if (BV (clib_bihash_search) (h, &kv, &kv) < 0)
	clib_warning ("search for key %lld failed unexpectedly\n",
	tm->keys[i]);
	if (kv.value != (u64) (i + 1))
	clib_warning ("search for key %lld returned %lld, not %lld\n",
	tm->keys, kv.value, (u64) (i + 1));
	}
	}

	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);

	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);

	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 = BV (clib_bihash_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 = BV (clib_bihash_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", BV (format_bihash), h, 0 /* very verbose */ );
	return 0;
	}

	clib_error_t *
	test_bihash_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_bihash (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 = 5;
	tm->verbose = 1;
	tm->search_iter = 1;
	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_bihash_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:
	*/