[PATCH] benchtests: Add benches for bzero (original) (raw)

H.J. Lu hjl.tools@gmail.com
Mon Feb 7 15:13:13 GMT 2022

Add bench-bzero-large.c, bench-bzero-walk.c and bench-bzero.c.

benchtests/Makefile | 3 + benchtests/bench-bzero-large.c | 117 ++++++++++++++++++++++++++++ benchtests/bench-bzero-walk.c | 118 +++++++++++++++++++++++++++++ benchtests/bench-bzero.c | 134 +++++++++++++++++++++++++++++++++ 4 files changed, 372 insertions(+) create mode 100644 benchtests/bench-bzero-large.c create mode 100644 benchtests/bench-bzero-walk.c create mode 100644 benchtests/bench-bzero.c

diff --git a/benchtests/Makefile b/benchtests/Makefile index 7c330e9967..6f718fac35 100644 --- a/benchtests/Makefile +++ b/benchtests/Makefile @@ -119,6 +119,9 @@ endif # String function benchmarks. string-benchset :=
+ bzero
+ bzero-large
+ bzero-walk
memccpy
memchr
memcmp
diff --git a/benchtests/bench-bzero-large.c b/benchtests/bench-bzero-large.c new file mode 100644 index 0000000000..f2e2e981b7 --- /dev/null +++ b/benchtests/bench-bzero-large.c @@ -0,0 +1,117 @@ +/* Measure bzero functions with large data sizes. + 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 + <https://www.gnu.org/licenses/>. */ + +#define TEST_MAIN +#define TEST_NAME "bzero" +#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" + +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) + +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) + { + CALL (impl, s, n); + } + 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> diff --git a/benchtests/bench-bzero-walk.c b/benchtests/bench-bzero-walk.c new file mode 100644 index 0000000000..d8e5b448c3 --- /dev/null +++ b/benchtests/bench-bzero-walk.c @@ -0,0 +1,118 @@ +/ Measure memset function throughput with large data sizes. + Copyright (C) 2017-2022 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 + <https://www.gnu.org/licenses/>. */ + +#define TEST_MAIN +#define TEST_NAME "memset" +#define START_SIZE 128 +#define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024) +#define TIMEOUT (20 * 60) +#include "bench-string.h" + +#include "json-lib.h" + +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) + +static void +do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR s_end, + size_t n) +{ + size_t i, iters = MIN_PAGE_SIZE / n; + timing_t start, stop, cur; + + TIMING_NOW (start); + for (i = 0; i < iters && s <= s_end; s_end -= n, i++) + CALL (impl, s, n); + TIMING_NOW (stop); + + TIMING_DIFF (cur, start, stop); + + /* Get time taken per function call. */ + json_element_double (json_ctx, (double) cur / i); +} + +static void +do_test (json_ctx_t *json_ctx, size_t len) +{ + json_element_object_begin (json_ctx); + json_attr_uint (json_ctx, "length", len); + json_array_begin (json_ctx, "timings"); + + FOR_EACH_IMPL (impl, 0) + { + do_one_test (json_ctx, impl, (CHAR *) buf1, + (CHAR *) buf1 + MIN_PAGE_SIZE - len, 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", "walk"); + + 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, i); + do_test (&json_ctx, i + 1); + } + + for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) + { + do_test (&json_ctx, i); + do_test (&json_ctx, i + 1); + } + + 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> diff --git a/benchtests/bench-bzero.c b/benchtests/bench-bzero.c new file mode 100644 index 0000000000..93ec521725 --- /dev/null +++ b/benchtests/bench-bzero.c @@ -0,0 +1,134 @@ +/ Measure bzero functions. + 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 + <https://www.gnu.org/licenses/>. */ + +#define TEST_MAIN +#define TEST_NAME "bzero" +#define MIN_PAGE_SIZE 131072 +#include "bench-string.h" + +#include "json-lib.h" + +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) + +static void +do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, size_t n) +{ + size_t i, iters = INNER_LOOP_ITERS_LARGE; + timing_t start, stop, cur; + + TIMING_NOW (start); + for (i = 0; i < iters; ++i) + { + CALL (impl, s, n); + } + 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 &= 4095; + 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); + } + + 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 (); + alloc_bufs (); + 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", "default"); + + 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 = 0; i < 18; ++i) + do_test (&json_ctx, 0, 1 << i); + for (i = 0; i < 64; ++i) + { + do_test (&json_ctx, i, i); + do_test (&json_ctx, 4096 - i, i); + do_test (&json_ctx, 4095, i); + if (i & (i - 1)) + do_test (&json_ctx, 0, i); + } + for (i = 32; i < 1024; i+=32) + { + do_test (&json_ctx, 0, i); + do_test (&json_ctx, i, i); + } + do_test (&json_ctx, 1, 14); + do_test (&json_ctx, 3, 1024); + do_test (&json_ctx, 4, 64); + do_test (&json_ctx, 2, 25); + + for (i = 33; i <= 256; i += 4) + { + do_test (&json_ctx, 0, 32 * i); + do_test (&json_ctx, i, 32 * 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>

2.34.1

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