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2623479105
Adjust iteration counts so benchmarks don't run too slowly or quickly. Ensure benchmarks take less than 10 seconds on older, slower cores and more than 0.5 seconds on fast cores. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
188 lines
4.4 KiB
C
188 lines
4.4 KiB
C
/* Measure STRLEN functions.
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Copyright (C) 2013-2023 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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#define TEST_MAIN
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#ifndef WIDE
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# define TEST_NAME "strlen"
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#else
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# define TEST_NAME "wcslen"
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# define generic_strlen generic_wcslen
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# define memchr_strlen wcschr_wcslen
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#endif
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#include "bench-string.h"
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#include "json-lib.h"
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typedef size_t (*proto_t) (const CHAR *);
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size_t generic_strlen (const CHAR *);
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size_t memchr_strlen (const CHAR *);
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IMPL (memchr_strlen, 0)
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IMPL (generic_strlen, 0)
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size_t
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memchr_strlen (const CHAR *p)
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{
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return (const CHAR *)MEMCHR (p, 0, PTRDIFF_MAX) - p;
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}
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IMPL (STRLEN, 1)
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static void
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do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, size_t exp_len)
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{
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size_t len = CALL (impl, s), i, iters = INNER_LOOP_ITERS_LARGE;
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timing_t start, stop, cur;
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if (len != exp_len)
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{
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error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
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len, exp_len);
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ret = 1;
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return;
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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, s);
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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 align, size_t len)
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{
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size_t i;
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align &= 63;
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if (align + sizeof (CHAR) * len >= page_size)
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return;
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "length", len);
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json_attr_uint (json_ctx, "alignment", align);
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json_array_begin (json_ctx, "timings");
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FOR_EACH_IMPL (impl, 0)
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{
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CHAR *buf = (CHAR *) (buf1);
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for (i = 0; i < len; ++i)
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buf[align + i] = 1 + 11111 * i % MAX_CHAR;
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buf[align + len] = 0;
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do_one_test (json_ctx, impl, (CHAR *) (buf + align), len);
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alloc_bufs ();
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}
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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", "");
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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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/* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/
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for (i = 1; i < 8; ++i)
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{
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do_test (&json_ctx, sizeof (CHAR) * i, i);
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do_test (&json_ctx, 0, i);
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}
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for (i = 2; i <= 12; ++i)
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{
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do_test (&json_ctx, 0, 1 << i);
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do_test (&json_ctx, sizeof (CHAR) * 7, 1 << i);
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do_test (&json_ctx, sizeof (CHAR) * i, 1 << i);
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do_test (&json_ctx, sizeof (CHAR) * i, (size_t)((1 << i) / 1.5));
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}
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for (i = 0; i < 512; i += 32)
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{
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do_test (&json_ctx, 0, i / sizeof (CHAR));
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}
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for (i = 512; i < 1024; i += 64)
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{
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do_test (&json_ctx, 0, i / sizeof (CHAR));
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}
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for (i = 1024; i < 2048; i += 128)
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{
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do_test (&json_ctx, 0, i / sizeof (CHAR));
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}
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for (i = 2048; i < 4096; i += 256)
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{
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do_test (&json_ctx, 0, i / sizeof (CHAR));
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}
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for (i = 4096; i < 8192; i += 512)
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{
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do_test (&json_ctx, 0, i / sizeof (CHAR));
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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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#ifndef WIDE
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# undef STRLEN
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# define STRLEN generic_strlen
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# include <string/strlen.c>
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#else
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# define WCSLEN generic_strlen
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# include <wcsmbs/wcslen.c>
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#endif
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