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46ae07324b
Improve string benchtest timing. Many tests run for 0.01s which is way too short to give accurate results. Other tests take over 40 seconds which is way too long. Significantly increase the iterations of the short running tests. Reduce number of alignment variations in the long running memcpy walk tests so they take less than 5 seconds. As a result most tests take at least 0.1s and all finish within 5 seconds. * benchtests/bench-memcpy-random.c (do_one_test): Use medium iterations. * benchtests/bench-memcpy-walk.c (test_main): Reduce alignment tests. * benchtests/bench-memmem.c (do_one_test): Use small iterations. * benchtests/bench-memmove-walk.c (test_main): Reduce alignment tests. * benchtests/bench-memset-walk.c (test_main): Reduce alignment tests. * benchtests/bench-strcasestr.c (do_one_test): Use small iterations. * benchtests/bench-string.h (INNER_LOOP_ITERS): Increase iterations. (INNER_LOOP_ITERS_MEDIUM): New define. (INNER_LOOP_ITERS_SMALL): New define. * benchtests/bench-strpbrk.c (do_one_test): Use medium iterations. * benchtests/bench-strsep.c (do_one_test): Use small iterations. * benchtests/bench-strspn.c (do_one_test): Use medium iterations. * benchtests/bench-strstr.c (do_one_test): Use small iterations. * benchtests/bench-strtok.c (do_one_test): Use small iterations.
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
/* Measure memset function throughput with large data sizes.
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Copyright (C) 2017-2019 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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<http://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifndef WIDE
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# define TEST_NAME "memset"
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#else
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# define TEST_NAME "wmemset"
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#endif /* WIDE */
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#define START_SIZE 128
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#define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
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#define TIMEOUT (20 * 60)
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#include "bench-string.h"
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#ifndef WIDE
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# define SIMPLE_MEMSET simple_memset
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#else
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# define SIMPLE_MEMSET simple_wmemset
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#endif /* WIDE */
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#include <assert.h>
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#include "json-lib.h"
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typedef CHAR *(*proto_t) (CHAR *, int, size_t);
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CHAR *
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inhibit_loop_to_libcall
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SIMPLE_MEMSET (CHAR *s, int c, size_t n)
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{
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CHAR *r = s, *end = s + n;
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while (r < end)
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*r++ = c;
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return s;
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}
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IMPL (SIMPLE_MEMSET, 1)
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static void
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do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end,
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int c __attribute ((unused)), size_t n)
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{
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size_t i, iters = MIN_PAGE_SIZE / n;
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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 && s <= s_end; s_end -= n, i++)
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CALL (impl, s, c, n);
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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/* Get time taken per function call. */
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json_element_double (json_ctx, (double) cur / i);
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}
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static void
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do_test (json_ctx_t *json_ctx, int c, size_t len)
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{
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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, "char", c);
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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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do_one_test (json_ctx, impl, (CHAR *) buf1,
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(CHAR *) buf1 + MIN_PAGE_SIZE - len, c, 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", "walk");
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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, 65, i);
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do_test (&json_ctx, 65, i + 1);
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}
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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, i);
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do_test (&json_ctx, 0, 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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