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Diffstat (limited to 'src/vppinfra/test_phash.c')
| -rw-r--r-- | src/vppinfra/test_phash.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/vppinfra/test_phash.c b/src/vppinfra/test_phash.c new file mode 100644 index 00000000..9ed2ac7b --- /dev/null +++ b/src/vppinfra/test_phash.c @@ -0,0 +1,149 @@ +/* + * 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. + */ +/* + Copyright (c) 2005 Eliot Dresselhaus + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#include <vppinfra/phash.h> +#include <vppinfra/format.h> +#include <vppinfra/random.h> + +static int verbose; +#define if_verbose(format,args...) \ + if (verbose) { clib_warning(format, ## args); } + +int +test_phash_main (unformat_input_t * input) +{ + phash_main_t _pm = { 0 }, *pm = &_pm; + int n_keys, random_keys; + u32 seed; + clib_error_t *error; + + random_keys = 1; + n_keys = 1000; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (0 == unformat (input, "keys %d", &n_keys) + && 0 == unformat (input, "verbose %=", &verbose, 1) + && 0 == unformat (input, "random-keys %=", &random_keys, 1) + && 0 == unformat (input, "sequential-keys %=", &random_keys, 0) + && 0 == unformat (input, "seed %d", &pm->random_seed) + && 0 == unformat (input, "64-bit %|", &pm->flags, PHASH_FLAG_MIX64) + && 0 == unformat (input, "32-bit %|", &pm->flags, PHASH_FLAG_MIX32) + && 0 == unformat (input, "fast %|", &pm->flags, + PHASH_FLAG_FAST_MODE) + && 0 == unformat (input, "slow %|", &pm->flags, + PHASH_FLAG_SLOW_MODE) + && 0 == unformat (input, "minimal %|", &pm->flags, + PHASH_FLAG_MINIMAL) + && 0 == unformat (input, "non-minimal %|", &pm->flags, + PHASH_FLAG_NON_MINIMAL)) + clib_error ("unknown input `%U'", format_unformat_error, input); + } + + if (!pm->random_seed) + pm->random_seed = random_default_seed (); + + if_verbose + ("%d %d-bit keys, random seed %d, %s mode, looking for %sminimal hash", + n_keys, (pm->flags & PHASH_FLAG_MIX64) ? 64 : 32, pm->random_seed, + (pm->flags & PHASH_FLAG_FAST_MODE) ? "fast" : "slow", + (pm->flags & PHASH_FLAG_MINIMAL) ? "" : "non-"); + + seed = pm->random_seed; + + /* Initialize random keys. */ + { + phash_key_t *k; + + vec_resize (pm->keys, n_keys); + vec_foreach (k, pm->keys) + { + k->key = k - pm->keys; + if (random_keys) + { + if (pm->flags & PHASH_FLAG_MIX64) + k->key = random_u64 (&seed); + else + k->key = random_u32 (&seed); + } + } + } + + error = phash_find_perfect_hash (pm); + if (error) + { + clib_error_report (error); + return 1; + } + else + { + if_verbose ("(%d,%d) (a,b) bits, %d seeds tried, %d tree walks", + pm->a_bits, pm->b_bits, + pm->n_seed_trials, pm->n_perfect_calls); + + error = phash_validate (pm); + if (error) + { + clib_error_report (error); + return 1; + } + } + + return 0; +} + +#ifdef CLIB_UNIX +int +main (int argc, char *argv[]) +{ + unformat_input_t i; + int res; + + verbose = (argc > 1); + unformat_init_command_line (&i, argv); + res = test_phash_main (&i); + unformat_free (&i); + return res; +} +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |