| /* Measure memcpy functions. |
| Copyright (C) 2013-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef MEMCPY_RESULT |
| # define MEMCPY_RESULT(dst, len) dst |
| # define MIN_PAGE_SIZE 131072 |
| # define TEST_MAIN |
| # define TEST_NAME "memcpy" |
| # include "bench-string.h" |
| |
| char *simple_memcpy (char *, const char *, size_t); |
| char *builtin_memcpy (char *, const char *, size_t); |
| |
| IMPL (simple_memcpy, 0) |
| IMPL (builtin_memcpy, 0) |
| IMPL (memcpy, 1) |
| |
| char * |
| simple_memcpy (char *dst, const char *src, size_t n) |
| { |
| char *ret = dst; |
| while (n--) |
| *dst++ = *src++; |
| return ret; |
| } |
| |
| char * |
| builtin_memcpy (char *dst, const char *src, size_t n) |
| { |
| return __builtin_memcpy (dst, src, n); |
| } |
| #endif |
| |
| # include "json-lib.h" |
| |
| typedef char *(*proto_t) (char *, const char *, size_t); |
| |
| static void |
| do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src, |
| size_t len) |
| { |
| size_t i, iters = INNER_LOOP_ITERS; |
| timing_t start, stop, cur; |
| |
| TIMING_NOW (start); |
| for (i = 0; i < iters; ++i) |
| { |
| CALL (impl, dst, src, len); |
| } |
| 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 align1, size_t align2, size_t len) |
| { |
| size_t i, j; |
| char *s1, *s2; |
| |
| align1 &= 63; |
| if (align1 + len >= page_size) |
| return; |
| |
| align2 &= 63; |
| if (align2 + len >= page_size) |
| return; |
| |
| s1 = (char *) (buf1 + align1); |
| s2 = (char *) (buf2 + align2); |
| |
| for (i = 0, j = 1; i < len; i++, j += 23) |
| s1[i] = j; |
| |
| json_element_object_begin (json_ctx); |
| json_attr_uint (json_ctx, "length", (double) len); |
| json_attr_uint (json_ctx, "align1", (double) align1); |
| json_attr_uint (json_ctx, "align2", (double) align2); |
| json_array_begin (json_ctx, "timings"); |
| |
| FOR_EACH_IMPL (impl, 0) |
| do_one_test (json_ctx, impl, s2, s1, len); |
| |
| json_array_end (json_ctx); |
| json_element_object_end (json_ctx); |
| } |
| |
| int |
| test_main (void) |
| { |
| json_ctx_t json_ctx; |
| size_t i; |
| |
| 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", "default"); |
| |
| 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 (i = 0; i < 18; ++i) |
| { |
| do_test (&json_ctx, 0, 0, 1 << i); |
| do_test (&json_ctx, i, 0, 1 << i); |
| do_test (&json_ctx, 0, i, 1 << i); |
| do_test (&json_ctx, i, i, 1 << i); |
| } |
| |
| for (i = 0; i < 32; ++i) |
| { |
| do_test (&json_ctx, 0, 0, i); |
| do_test (&json_ctx, i, 0, i); |
| do_test (&json_ctx, 0, i, i); |
| do_test (&json_ctx, i, i, i); |
| } |
| |
| for (i = 3; i < 32; ++i) |
| { |
| if ((i & (i - 1)) == 0) |
| continue; |
| do_test (&json_ctx, 0, 0, 16 * i); |
| do_test (&json_ctx, i, 0, 16 * i); |
| do_test (&json_ctx, 0, i, 16 * i); |
| do_test (&json_ctx, i, i, 16 * i); |
| } |
| |
| for (i = 32; i < 64; ++i) |
| { |
| do_test (&json_ctx, 0, 0, 32 * i); |
| do_test (&json_ctx, i, 0, 32 * i); |
| do_test (&json_ctx, 0, i, 32 * i); |
| do_test (&json_ctx, i, i, 32 * i); |
| } |
| |
| do_test (&json_ctx, 0, 0, getpagesize ()); |
| |
| 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> |