| /* Measure memset 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/>. */ |
| |
| #define TEST_MAIN |
| #ifdef TEST_BZERO |
| # define TEST_NAME "bzero" |
| #else |
| # ifndef WIDE |
| # define TEST_NAME "memset" |
| # else |
| # define TEST_NAME "wmemset" |
| # endif /* WIDE */ |
| #endif /* !TEST_BZERO */ |
| #define MIN_PAGE_SIZE 131072 |
| #include "bench-string.h" |
| |
| #ifndef WIDE |
| # define MEMSET memset |
| # define CHAR char |
| # define SIMPLE_MEMSET simple_memset |
| # define MEMCMP memcmp |
| #else |
| # include <wchar.h> |
| # define MEMSET wmemset |
| # define CHAR wchar_t |
| # define SIMPLE_MEMSET simple_wmemset |
| # define MEMCMP wmemcmp |
| #endif /* WIDE */ |
| |
| #include "json-lib.h" |
| |
| CHAR *SIMPLE_MEMSET (CHAR *, int, size_t); |
| |
| #ifdef TEST_BZERO |
| typedef void (*proto_t) (char *, size_t); |
| void simple_bzero (char *, size_t); |
| void builtin_bzero (char *, size_t); |
| |
| IMPL (simple_bzero, 0) |
| IMPL (builtin_bzero, 0) |
| IMPL (bzero, 1) |
| |
| void |
| simple_bzero (char *s, size_t n) |
| { |
| SIMPLE_MEMSET (s, 0, n); |
| } |
| |
| void |
| builtin_bzero (char *s, size_t n) |
| { |
| __builtin_bzero (s, n); |
| } |
| #else |
| typedef CHAR *(*proto_t) (CHAR *, int, size_t); |
| |
| IMPL (SIMPLE_MEMSET, 0) |
| # ifndef WIDE |
| char *builtin_memset (char *, int, size_t); |
| IMPL (builtin_memset, 0) |
| # endif /* !WIDE */ |
| IMPL (MEMSET, 1) |
| |
| # ifndef WIDE |
| char * |
| builtin_memset (char *s, int c, size_t n) |
| { |
| return __builtin_memset (s, c, n); |
| } |
| # endif /* !WIDE */ |
| #endif /* !TEST_BZERO */ |
| |
| CHAR * |
| inhibit_loop_to_libcall |
| SIMPLE_MEMSET (CHAR *s, int c, size_t n) |
| { |
| CHAR *r = s, *end = s + n; |
| while (r < end) |
| *r++ = c; |
| return s; |
| } |
| |
| static void |
| do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, |
| int c __attribute ((unused)), size_t n) |
| { |
| size_t i, iters = INNER_LOOP_ITERS; |
| timing_t start, stop, cur; |
| |
| TIMING_NOW (start); |
| for (i = 0; i < iters; ++i) |
| { |
| #ifdef TEST_BZERO |
| CALL (impl, s, n); |
| #else |
| CALL (impl, s, c, n); |
| #endif /* !TEST_BZERO */ |
| } |
| 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, int c, size_t len) |
| { |
| align &= 63; |
| if ((align + len) * sizeof (CHAR) > page_size) |
| return; |
| |
| json_element_object_begin (json_ctx); |
| json_attr_uint (json_ctx, "length", len); |
| json_attr_uint (json_ctx, "alignment", align); |
| json_attr_int (json_ctx, "char", c); |
| json_array_begin (json_ctx, "timings"); |
| |
| FOR_EACH_IMPL (impl, 0) |
| { |
| do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len); |
| realloc_bufs (); |
| } |
| |
| json_array_end (json_ctx); |
| json_element_object_end (json_ctx); |
| } |
| |
| int |
| test_main (void) |
| { |
| json_ctx_t json_ctx; |
| size_t i; |
| int c = 0; |
| |
| 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"); |
| |
| #ifndef TEST_BZERO |
| for (c = -65; c <= 130; c += 65) |
| #endif |
| { |
| for (i = 0; i < 18; ++i) |
| do_test (&json_ctx, 0, c, 1 << i); |
| for (i = 1; i < 32; ++i) |
| { |
| do_test (&json_ctx, i, c, i); |
| if (i & (i - 1)) |
| do_test (&json_ctx, 0, c, i); |
| } |
| for (i = 32; i < 512; i+=32) |
| { |
| do_test (&json_ctx, 0, c, i); |
| do_test (&json_ctx, i, c, i); |
| } |
| do_test (&json_ctx, 1, c, 14); |
| do_test (&json_ctx, 3, c, 1024); |
| do_test (&json_ctx, 4, c, 64); |
| do_test (&json_ctx, 2, c, 25); |
| } |
| for (i = 33; i <= 256; i += 4) |
| { |
| do_test (&json_ctx, 0, c, 32 * i); |
| do_test (&json_ctx, i, c, 32 * i); |
| } |
| |
| 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> |