/* Measure bzero functions with large data sizes. Copyright (C) 2022-2023 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 <https://www.gnu.org/licenses/>. */ #define TEST_MAIN #ifdef DO_MEMSET # define TEST_NAME "memset" #else # define TEST_NAME "bzero" #endif #define START_SIZE (128 * 1024) #define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024) #define TIMEOUT (20 * 60) #include "bench-string.h" #include "json-lib.h" #ifdef DO_MEMSET void *generic_memset (void *, int, size_t); typedef void *(*proto_t) (void *, int, size_t); IMPL (memset, 1) IMPL (generic_memset, 0) #else static void memset_zero (void * s, size_t len) { memset (s, '\0', len); } typedef void (*proto_t) (void *, size_t); IMPL (bzero, 1) IMPL (memset_zero, 0) #endif static void do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, size_t n) { size_t i, iters = 16; timing_t start, stop, cur; TIMING_NOW (start); for (i = 0; i < iters; ++i) { #ifdef DO_MEMSET CALL (impl, s, 0, n); #else CALL (impl, s, n); #endif } 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, 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_array_begin (json_ctx, "timings"); FOR_EACH_IMPL (impl, 0) { do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, len); alloc_bufs (); } json_array_end (json_ctx); json_element_object_end (json_ctx); } int test_main (void) { json_ctx_t json_ctx; size_t i; 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", "large"); 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"); for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) { do_test (&json_ctx, 0, i); do_test (&json_ctx, 3, 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> #ifdef DO_MEMSET # define libc_hidden_builtin_def(X) # define libc_hidden_def(X) # define libc_hidden_weak(X) # define weak_alias(X,Y) # undef MEMSET # define MEMSET generic_memset # include <string/memset.c> #endif