216 lines
6.6 KiB
C
216 lines
6.6 KiB
C
/* Measure memcpy functions.
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Copyright (C) 2013-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef MEMCPY_RESULT
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# define MEMCPY_RESULT(dst, len) dst
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# define MIN_PAGE_SIZE 131072
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# define TEST_MAIN
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# define TEST_NAME "memcpy"
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# include "bench-string.h"
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void *generic_memcpy (void *, const void *, size_t);
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IMPL (memcpy, 1)
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IMPL (generic_memcpy, 0)
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#endif
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# include "json-lib.h"
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typedef void *(*proto_t) (void *, const void *, size_t);
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static void
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do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src,
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size_t len)
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{
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size_t i, iters = INNER_LOOP_ITERS;
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timing_t start, stop, cur;
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for (i = 0; i < iters / 64; ++i)
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{
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CALL (impl, dst, src, len);
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}
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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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{
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CALL (impl, dst, src, len);
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}
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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json_element_double (json_ctx, (double) cur / (double) iters);
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}
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static void
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do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
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int both_ways)
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{
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size_t i, j;
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char *s1, *s2;
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size_t repeats;
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align1 &= (getpagesize () - 1);
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if (align1 + len >= page_size)
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return;
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align2 &= (getpagesize () - 1);
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if (align2 + len >= page_size)
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return;
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s1 = (char *) (buf1 + align1);
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s2 = (char *) (buf2 + align2);
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for (repeats = both_ways ? 2 : 1; repeats; --repeats)
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{
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for (i = 0, j = 1; i < len; i++, j += 23)
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s1[i] = j;
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "length", (double) len);
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json_attr_uint (json_ctx, "align1", (double) align1);
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json_attr_uint (json_ctx, "align2", (double) align2);
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json_attr_uint (json_ctx, "dst > src", (double) (s2 > s1));
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json_array_begin (json_ctx, "timings");
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FOR_EACH_IMPL (impl, 0)
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do_one_test (json_ctx, impl, s2, s1, len);
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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s1 = (char *) (buf2 + align1);
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s2 = (char *) (buf1 + align2);
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}
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}
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int
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test_main (void)
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{
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json_ctx_t json_ctx;
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size_t i;
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size_t half_page = getpagesize () / 2;
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test_init ();
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json_init (&json_ctx, 0, stdout);
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json_document_begin (&json_ctx);
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json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
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json_attr_object_begin (&json_ctx, "functions");
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json_attr_object_begin (&json_ctx, TEST_NAME);
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json_attr_string (&json_ctx, "bench-variant", "default");
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json_array_begin (&json_ctx, "ifuncs");
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FOR_EACH_IMPL (impl, 0)
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json_element_string (&json_ctx, impl->name);
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json_array_end (&json_ctx);
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json_array_begin (&json_ctx, "results");
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for (i = 0; i < 18; ++i)
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{
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do_test (&json_ctx, 0, 0, 1 << i, 1);
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do_test (&json_ctx, i, 0, 1 << i, 1);
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do_test (&json_ctx, i + 32, 0, 1 << i, 1);
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do_test (&json_ctx, 0, i, 1 << i, 1);
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do_test (&json_ctx, 0, i + 32, 1 << i, 1);
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do_test (&json_ctx, i, i, 1 << i, 1);
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do_test (&json_ctx, i + 32, i + 32, 1 << i, 1);
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do_test (&json_ctx, half_page, 0, 1 << i, 1);
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do_test (&json_ctx, half_page + i, 0, 1 << i, 1);
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do_test (&json_ctx, half_page, i, 1 << i, 1);
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do_test (&json_ctx, half_page + i, i, 1 << i, 1);
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}
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for (i = 0; i < 32; ++i)
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{
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do_test (&json_ctx, 0, 0, i, 0);
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do_test (&json_ctx, i, 0, i, 0);
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do_test (&json_ctx, 0, i, i, 0);
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do_test (&json_ctx, i, i, i, 0);
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do_test (&json_ctx, half_page, 0, i, 0);
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do_test (&json_ctx, half_page + i, 0, i, 0);
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do_test (&json_ctx, half_page, i, i, 0);
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do_test (&json_ctx, half_page + i, i, i, 0);
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do_test (&json_ctx, getpagesize () - 1, 0, i, 0);
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do_test (&json_ctx, 0, getpagesize () - 1, i, 0);
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}
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for (i = 3; i < 32; ++i)
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{
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if ((i & (i - 1)) == 0)
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continue;
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do_test (&json_ctx, 0, 0, 16 * i, 1);
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do_test (&json_ctx, i, 0, 16 * i, 1);
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do_test (&json_ctx, 0, i, 16 * i, 1);
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do_test (&json_ctx, i, i, 16 * i, 1);
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do_test (&json_ctx, half_page, 0, 16 * i, 1);
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do_test (&json_ctx, half_page + i, 0, 16 * i, 1);
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do_test (&json_ctx, half_page, i, 16 * i, 1);
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do_test (&json_ctx, half_page + i, i, 16 * i, 1);
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}
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for (i = 32; i < 64; ++i)
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{
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do_test (&json_ctx, 0, 0, 32 * i, 1);
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do_test (&json_ctx, i, 0, 32 * i, 1);
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do_test (&json_ctx, 0, i, 32 * i, 1);
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do_test (&json_ctx, i, i, 32 * i, 1);
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do_test (&json_ctx, half_page, 0, 32 * i, 1);
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do_test (&json_ctx, half_page + i, 0, 32 * i, 1);
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do_test (&json_ctx, half_page, i, 32 * i, 1);
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do_test (&json_ctx, half_page + i, i, 32 * i, 1);
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}
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do_test (&json_ctx, 0, 0, getpagesize (), 1);
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for (i = 0; i <= 48; ++i)
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{
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do_test (&json_ctx, 0, 0, 2048 + 64 * i, 1);
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do_test (&json_ctx, i, 0, 2048 + 64 * i, 1);
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do_test (&json_ctx, i + 32, 0, 2048 + 64 * i, 1);
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do_test (&json_ctx, 0, i, 2048 + 64 * i, 1);
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do_test (&json_ctx, 0, i + 32, 2048 + 64 * i, 1);
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do_test (&json_ctx, i, i, 2048 + 64 * i, 1);
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do_test (&json_ctx, i + 32, i + 32, 2048 + 64 * i, 1);
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do_test (&json_ctx, half_page, 0, 2048 + 64 * i, 1);
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do_test (&json_ctx, half_page + i, 0, 2048 + 64 * i, 1);
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do_test (&json_ctx, half_page, i, 2048 + 64 * i, 1);
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do_test (&json_ctx, half_page + i, i, 2048 + 64 * i, 1);
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do_test (&json_ctx, i, 1, 2048 + 64 * i, 1);
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do_test (&json_ctx, 1, i, 2048 + 64 * i, 1);
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do_test (&json_ctx, i + 32, 1, 2048 + 64 * i, 1);
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do_test (&json_ctx, 1, i + 32, 2048 + 64 * i, 1);
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do_test (&json_ctx, half_page + i, 1, 2048 + 64 * i, 1);
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do_test (&json_ctx, half_page + 1, i, 2048 + 64 * i, 1);
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}
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json_array_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_document_end (&json_ctx);
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return ret;
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}
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#include <support/test-driver.c>
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#define libc_hidden_builtin_def(X)
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#undef MEMCPY
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#define MEMCPY generic_memcpy
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#include <string/memcpy.c>
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#include <string/wordcopy.c>
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