From 319dddc143d0c59cc48661fa141ae575f80a074a Mon Sep 17 00:00:00 2001 From: Noah Goldstein Date: Thu, 19 May 2022 17:18:01 -0500 Subject: benchtests: Add benchtests for dl_elf_hash, dl_new_hash and nss_hash Benchtests are for throughput and include random / fixed size benchmarks. Reviewed-by: Siddhesh Poyarekar --- benchtests/bench-hash-funcs-kernel.h | 86 ++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 benchtests/bench-hash-funcs-kernel.h (limited to 'benchtests/bench-hash-funcs-kernel.h') diff --git a/benchtests/bench-hash-funcs-kernel.h b/benchtests/bench-hash-funcs-kernel.h new file mode 100644 index 0000000000..83995cc0ae --- /dev/null +++ b/benchtests/bench-hash-funcs-kernel.h @@ -0,0 +1,86 @@ +/* Actual benchmark kernels used by bench-hash-funcs.h + Copyright (C) 2022 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 + . */ + + + +/* We go through the trouble of using macros here because many of the + hash functions are meant to be inlined so its not fair to benchmark + them with a function pointer where they won't be inlinable. */ +#undef RUN_FUNC +#undef POSTFIX +#ifdef SIMPLE +# define RUN_FUNC SIMPLE_TEST_FUNC +# define POSTFIX _simple +#else +# define RUN_FUNC TEST_FUNC +# define POSTFIX _optimized +#endif + +#define PRIMITIVE_CAT(x, y) x ## y +#define CAT(x, y) PRIMITIVE_CAT (x, y) + +static double __attribute__ ((noinline, noclone)) +CAT (do_one_test_kernel, POSTFIX) (const char *s, size_t len) +{ + + unsigned int iters; + timing_t start, stop, cur; + + /* Warmup. */ + for (iters = NFIXED_ITERS / 32; iters; --iters) + DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len)); + + TIMING_NOW (start); + for (iters = NFIXED_ITERS; iters; --iters) + DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len)); + + TIMING_NOW (stop); + + TIMING_DIFF (cur, start, stop); + + (void) (len); + return (double) cur / (double) NFIXED_ITERS; +} + +static double __attribute__ ((noinline, noclone)) +CAT (do_rand_test_kernel, POSTFIX) (char const *bufs, + unsigned int const *sizes) +{ + unsigned int i, iters; + size_t offset; + timing_t start, stop, cur; + + /* Warmup. */ + for (i = 0, offset = 0; i < NRAND_BUFS; ++i, offset += RAND_BENCH_MAX_LEN) + DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i])); + + TIMING_NOW (start); + for (iters = NRAND_ITERS; iters; --iters) + { + for (i = 0, offset = 0; i < NRAND_BUFS; + ++i, offset += RAND_BENCH_MAX_LEN) + DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i])); + + } + TIMING_NOW (stop); + + TIMING_DIFF (cur, start, stop); + + (void) (sizes); + return (double) cur / (double) (NRAND_ITERS * NRAND_BUFS); +} -- cgit 1.4.1