/* Measure STRCHR functions. Copyright (C) 2013-2024 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #define TEST_MAIN #ifdef WIDE # define TEST_NAME "wcsrchr" #else # define TEST_NAME "strrchr" #endif #include "bench-string.h" #include "json-lib.h" #define BIG_CHAR MAX_CHAR #ifdef WIDE # define SMALL_CHAR 1273 #else # define SMALL_CHAR 127 char * generic_strrchr (const char *, int); IMPL (generic_strrchr, 0) #endif typedef CHAR *(*proto_t) (const CHAR *, int); IMPL (STRRCHR, 1) static void do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, int c, CHAR *exp_res) { CHAR *res = CALL (impl, s, c); size_t i, iters = INNER_LOOP_ITERS8; timing_t start, stop, cur; if (res != exp_res) { error (0, 0, "Wrong result in function %s %p %p", impl->name, res, exp_res); ret = 1; return; } TIMING_NOW (start); for (i = 0; i < iters; ++i) { CALL (impl, s, c); } TIMING_NOW (stop); TIMING_DIFF (cur, start, stop); json_element_double (json_ctx, (double) cur / (double) iters); } static void do_test (json_ctx_t *json_ctx, size_t align, size_t pos, size_t len, int seek_char, int max_char, size_t freq) /* For wcsrchr: align here means align not in bytes, but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)) len for wcschr here isn't in bytes but it's number of wchar_t symbols. */ { size_t i; size_t pos_chunk_sz = freq ? (pos / freq) : pos; size_t last_pos = len; CHAR *result; CHAR *buf = (CHAR *) buf1; align &= (getpagesize () - 1); if ((align + len) * sizeof (CHAR) >= page_size) return; for (i = 0; i < len; ++i) { buf[align + i] = (random () * random ()) & max_char; if (!buf[align + i]) buf[align + i] = (random () * random ()) & max_char; if (!buf[align + i]) buf[align + i] = 1; if ((i > pos || pos >= len) && buf[align + i] == seek_char) buf[align + i] = seek_char + 10 + (random () & 15); } if (pos_chunk_sz == 0 && pos) pos_chunk_sz = 1; for (i = pos_chunk_sz; i < pos && i < len; i += pos_chunk_sz) { buf[align + i] = seek_char; last_pos = i; } buf[align + len] = 0; if (pos < len) { buf[align + pos] = seek_char; result = (CHAR *) (buf + align + pos); } else if (last_pos < len) result = (CHAR *) (buf + align + last_pos); else if (seek_char == 0) result = (CHAR *) (buf + align + len); else result = NULL; json_element_object_begin (json_ctx); json_attr_uint (json_ctx, "len", len); json_attr_uint (json_ctx, "pos", pos); json_attr_uint (json_ctx, "align", align); json_attr_uint (json_ctx, "freq", freq); json_attr_uint (json_ctx, "seek", seek_char); json_attr_uint (json_ctx, "max_char", max_char); json_array_begin (json_ctx, "timings"); FOR_EACH_IMPL (impl, 0) do_one_test (json_ctx, impl, (CHAR *) (buf + align), seek_char, result); json_array_end (json_ctx); json_element_object_end (json_ctx); } int test_main (void) { json_ctx_t json_ctx; size_t i, j, k; int seek; test_init (); json_init (&json_ctx, 0, stdout); json_document_begin (&json_ctx); json_attr_string (&json_ctx, "timing_type", TIMING_TYPE); json_attr_object_begin (&json_ctx, "functions"); json_attr_object_begin (&json_ctx, TEST_NAME); json_attr_string (&json_ctx, "bench-variant", ""); json_array_begin (&json_ctx, "ifuncs"); FOR_EACH_IMPL (impl, 0) json_element_string (&json_ctx, impl->name); json_array_end (&json_ctx); json_array_begin (&json_ctx, "results"); for (seek = 0; seek <= 23; seek += 23) { for (j = 1; j <= 256; j = (j * 4)) { for (i = 1; i < 9; ++i) { do_test (&json_ctx, 0, 16 << i, 2048, seek, SMALL_CHAR, j); do_test (&json_ctx, i, 16 << i, 2048, seek, SMALL_CHAR, j); } for (i = 1; i < 8; ++i) { do_test (&json_ctx, i, 64, 256, seek, SMALL_CHAR, j); do_test (&json_ctx, i, 64, 256, seek, BIG_CHAR, j); do_test (&json_ctx, i * 15, 64, 256, seek, SMALL_CHAR, j); do_test (&json_ctx, i * 15, 64, 256, seek, BIG_CHAR, j); } for (i = 0; i < 32; ++i) { do_test (&json_ctx, 0, i, i + 1, seek, SMALL_CHAR, j); do_test (&json_ctx, 0, i, i + 1, seek, BIG_CHAR, j); do_test (&json_ctx, getpagesize () - i / 2 - 1, i, i + 1, seek, SMALL_CHAR, j); } for (i = (16 / sizeof (CHAR)); i <= (288 / sizeof (CHAR)); i += 32) { do_test (&json_ctx, 0, i - 16, i, seek, SMALL_CHAR, j); do_test (&json_ctx, 0, i, i + 16, seek, SMALL_CHAR, j); } for (i = (16 / sizeof (CHAR)); i <= (2048 / sizeof (CHAR)); i += i) { for (k = 0; k <= (288 / sizeof (CHAR)); k += (48 / sizeof (CHAR))) { do_test (&json_ctx, 0, k, i, seek, SMALL_CHAR, j); do_test (&json_ctx, 0, i, i + k, seek, SMALL_CHAR, j); if (k < i) { do_test (&json_ctx, 0, i - k, i, seek, SMALL_CHAR, j); do_test (&json_ctx, 0, k, i - k, seek, SMALL_CHAR, j); do_test (&json_ctx, 0, i, i - k, seek, SMALL_CHAR, j); } } } if (seek == 0) { break; } } } json_array_end (&json_ctx); json_attr_object_end (&json_ctx); json_attr_object_end (&json_ctx); json_document_end (&json_ctx); return ret; } #include <support/test-driver.c> #define weak_alias(X,Y) #define libc_hidden_builtin_def(X) #ifndef WIDE # undef STRRCHR # define STRRCHR generic_strrchr # define __memrchr memrchr # include <string/strrchr.c> #endif