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81cbc3bcae
No Bug. This commit expanding the range of tests / benchmarks for memmove and memcpy. The test expansion is mostly in the vein of increasing the maximum size, increasing the number of unique alignments tested, and testing both source < destination and vice versa. The benchmark expansaion is just to increase the number of unique alignments. test-memcpy, test-memccpy, test-mempcpy, test-memmove, and tst-memmove-overflow all pass. Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* Measure memcpy functions with large data sizes.
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Copyright (C) 2016-2021 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 START_SIZE (64 * 1024)
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# define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
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# define TEST_MAIN
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# define TEST_NAME "memcpy"
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# define TIMEOUT (20 * 60)
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# include "bench-string.h"
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IMPL (memcpy, 1)
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#endif
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#include "json-lib.h"
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typedef char *(*proto_t) (char *, const char *, 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 = 16;
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timing_t start, stop, cur;
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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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{
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size_t i, j;
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char *s1, *s2;
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align1 &= 4095;
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if (align1 + len >= page_size)
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return;
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align2 &= 4095;
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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 (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_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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}
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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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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", "large");
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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 = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
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{
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do_test (&json_ctx, 0, 0, i + 7);
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do_test (&json_ctx, 0, 3, i + 15);
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do_test (&json_ctx, 3, 0, i + 31);
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do_test (&json_ctx, 3, 5, i + 63);
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do_test (&json_ctx, 0, 127, i);
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do_test (&json_ctx, 0, 255, i);
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do_test (&json_ctx, 0, 256, i);
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do_test (&json_ctx, 0, 4064, i);
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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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