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Diffstat (limited to 'benchtests/bench-string.h')
| -rw-r--r-- | benchtests/bench-string.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/benchtests/bench-string.h b/benchtests/bench-string.h new file mode 100644 index 0000000000..2fe8d9fae4 --- /dev/null +++ b/benchtests/bench-string.h @@ -0,0 +1,212 @@ +/* Measure string and memory functions. + Copyright (C) 2013 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 + <http://www.gnu.org/licenses/>. */ + +#include <sys/cdefs.h> + +typedef struct +{ + const char *name; + void (*fn) (void); + long test; +} impl_t; +extern impl_t __start_impls[], __stop_impls[]; + +#define IMPL(name, test) \ + impl_t tst_ ## name \ + __attribute__ ((section ("impls"), aligned (sizeof (void *)))) \ + = { __STRING (name), (void (*) (void))name, test }; + +#ifdef TEST_MAIN + +# ifndef _GNU_SOURCE +# define _GNU_SOURCE +# endif + +# undef __USE_STRING_INLINES + +# include <stdio.h> +# include <stdlib.h> +# include <string.h> +# include <sys/mman.h> +# include <sys/param.h> +# include <unistd.h> +# include <fcntl.h> +# include <error.h> +# include <errno.h> +# include <time.h> +# include <ifunc-impl-list.h> +# define GL(x) _##x +# define GLRO(x) _##x +# include <hp-timing.h> + + +# define TEST_FUNCTION test_main () +# define TIMEOUT (4 * 60) +# define OPT_ITERATIONS 10000 +# define OPT_RANDOM 10001 +# define OPT_SEED 10002 + +unsigned char *buf1, *buf2; +int ret, do_srandom; +unsigned int seed; +size_t page_size; + +hp_timing_t _dl_hp_timing_overhead; + +# ifndef ITERATIONS +size_t iterations = 100000; +# define ITERATIONS_OPTIONS \ + { "iterations", required_argument, NULL, OPT_ITERATIONS }, +# define ITERATIONS_PROCESS \ + case OPT_ITERATIONS: \ + iterations = strtoul (optarg, NULL, 0); \ + break; +# define ITERATIONS iterations +# else +# define ITERATIONS_OPTIONS +# define ITERATIONS_PROCESS +# endif + +# define CMDLINE_OPTIONS ITERATIONS_OPTIONS \ + { "random", no_argument, NULL, OPT_RANDOM }, \ + { "seed", required_argument, NULL, OPT_SEED }, +# define CMDLINE_PROCESS ITERATIONS_PROCESS \ + case OPT_RANDOM: \ + { \ + int fdr = open ("/dev/urandom", O_RDONLY); \ + \ + if (fdr < 0 || read (fdr, &seed, sizeof(seed)) != sizeof (seed)) \ + seed = time (NULL); \ + if (fdr >= 0) \ + close (fdr); \ + do_srandom = 1; \ + break; \ + } \ + \ + case OPT_SEED: \ + seed = strtoul (optarg, NULL, 0); \ + do_srandom = 1; \ + break; + +# define CALL(impl, ...) \ + (* (proto_t) (impl)->fn) (__VA_ARGS__) + +# if defined TEST_IFUNC && defined TEST_NAME +/* Increase size of FUNC_LIST if assert is triggered at run-time. */ +static struct libc_ifunc_impl func_list[32]; +static int func_count; +static int impl_count = -1; +static impl_t *impl_array; + +# define FOR_EACH_IMPL(impl, notall) \ + impl_t *impl; \ + int count; \ + if (impl_count == -1) \ + { \ + impl_count = 0; \ + if (func_count != 0) \ + { \ + int f; \ + impl_t *skip = NULL, *a; \ + for (impl = __start_impls; impl < __stop_impls; ++impl) \ + if (strcmp (impl->name, TEST_NAME) == 0) \ + skip = impl; \ + else \ + impl_count++; \ + a = impl_array = malloc ((impl_count + func_count) * \ + sizeof (impl_t)); \ + for (impl = __start_impls; impl < __stop_impls; ++impl) \ + if (impl != skip) \ + *a++ = *impl; \ + for (f = 0; f < func_count; f++) \ + if (func_list[f].usable) \ + { \ + a->name = func_list[f].name; \ + a->fn = func_list[f].fn; \ + a->test = 1; \ + a++; \ + } \ + impl_count = a - impl_array; \ + } \ + else \ + { \ + impl_count = __stop_impls - __start_impls; \ + impl_array = __start_impls; \ + } \ + } \ + impl = impl_array; \ + for (count = 0; count < impl_count; ++count, ++impl) \ + if (!notall || impl->test) +# else /* ! (defined TEST_IFUNC && defined TEST_NAME) */ +# define FOR_EACH_IMPL(impl, notall) \ + for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl) \ + if (!notall || impl->test) +# endif /* ! (defined TEST_IFUNC && defined TEST_NAME) */ + +# define HP_TIMING_BEST(best_time, start, end) \ + do \ + { \ + hp_timing_t tmptime; \ + HP_TIMING_DIFF (tmptime, start + _dl_hp_timing_overhead, end); \ + if (best_time > tmptime) \ + best_time = tmptime; \ + } \ + while (0) + +# ifndef BUF1PAGES +# define BUF1PAGES 1 +# endif + +static void +test_init (void) +{ +# if defined TEST_IFUNC && defined TEST_NAME + func_count = __libc_ifunc_impl_list (TEST_NAME, func_list, + (sizeof func_list + / sizeof func_list[0])); +# endif + + page_size = 2 * getpagesize (); +# ifdef MIN_PAGE_SIZE + if (page_size < MIN_PAGE_SIZE) + page_size = MIN_PAGE_SIZE; +# endif + buf1 = mmap (0, (BUF1PAGES + 1) * page_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); + if (buf1 == MAP_FAILED) + error (EXIT_FAILURE, errno, "mmap failed"); + if (mprotect (buf1 + BUF1PAGES * page_size, page_size, PROT_NONE)) + error (EXIT_FAILURE, errno, "mprotect failed"); + buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); + if (buf2 == MAP_FAILED) + error (EXIT_FAILURE, errno, "mmap failed"); + if (mprotect (buf2 + page_size, page_size, PROT_NONE)) + error (EXIT_FAILURE, errno, "mprotect failed"); + HP_TIMING_DIFF_INIT (); + if (do_srandom) + { + printf ("Setting seed to 0x%x\n", seed); + srandom (seed); + } + + memset (buf1, 0xa5, BUF1PAGES * page_size); + memset (buf2, 0x5a, page_size); +} + +#endif /* TEST_MAIN */ |