From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vppinfra/test_random.c | 148 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 src/vppinfra/test_random.c (limited to 'src/vppinfra/test_random.c') diff --git a/src/vppinfra/test_random.c b/src/vppinfra/test_random.c new file mode 100644 index 00000000..49759eac --- /dev/null +++ b/src/vppinfra/test_random.c @@ -0,0 +1,148 @@ +/* + * 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) 2001, 2002, 2003 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 +#include + +static u32 known_random_sequence[] = { + 0x00000000, 0x3c6ef35f, 0x47502932, 0xd1ccf6e9, + 0xaaf95334, 0x6252e503, 0x9f2ec686, 0x57fe6c2d, + 0xa3d95fa8, 0x81fdbee7, 0x94f0af1a, 0xcbf633b1, +}; + + +int +test_random_main (unformat_input_t * input) +{ + uword n_iterations; + uword i, repeat_count; + uword *bitmap = 0; + uword print; + u32 seed; + u32 *seedp = &seed; + + /* first, check known sequence from Numerical Recipes in C, 2nd ed. + page 284 */ + seed = known_random_sequence[0]; + for (i = 0; i < ARRAY_LEN (known_random_sequence) - 1; i++) + { + u32 rv; + rv = random_u32 (seedp); + if (rv != known_random_sequence[i + 1]) + { + fformat (stderr, "known sequence check FAILS at index %d", i + 1); + break; + } + } + + clib_warning ("known sequence check passes"); + + n_iterations = 1000; + seed = 0; + print = 1 << 24; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (0 == unformat (input, "iter %d", &n_iterations) + && 0 == unformat (input, "print %d", &print) + && 0 == unformat (input, "seed %d", &seed)) + clib_error ("unknown input `%U'", format_unformat_error, input); + } + + if (!seed) + seed = random_default_seed (); + + if (n_iterations == 0) + n_iterations = random_u32_max (); + + clib_warning ("%d iterations, seed %d\n", n_iterations, seed); + + repeat_count = 0; + for (i = 0; i < n_iterations; i++) + { + uword r = random_u32 (&seed); + uword b, ri, rj; + + ri = r / BITS (bitmap[0]); + rj = (uword) 1 << (r % BITS (bitmap[0])); + + vec_validate (bitmap, ri); + b = bitmap[ri]; + + if (b & rj) + goto repeat; + b |= rj; + bitmap[ri] = b; + + if (0 == (i & (print - 1))) + fformat (stderr, "0x%08x iterations %d repeats\n", i, repeat_count); + continue; + + repeat: + fformat (stderr, "repeat found at iteration %d/%d\n", i, n_iterations); + repeat_count++; + continue; + } + + return 0; +} + +#ifdef CLIB_UNIX +int +main (int argc, char *argv[]) +{ + unformat_input_t i; + int ret; + + clib_mem_init (0, 3ULL << 30); + + unformat_init_command_line (&i, argv); + ret = test_random_main (&i); + unformat_free (&i); + + return ret; +} +#endif /* CLIB_UNIX */ + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg