2017-10-06 00:23:13 +08:00
|
|
|
/* Measure memmove function combined throughput for different alignments.
|
2023-01-07 05:08:04 +08:00
|
|
|
Copyright (C) 2017-2023 Free Software Foundation, Inc.
|
2017-10-06 00:23:13 +08:00
|
|
|
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
|
Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
|
|
|
<https://www.gnu.org/licenses/>. */
|
2017-10-06 00:23:13 +08:00
|
|
|
|
|
|
|
/* This microbenchmark measures the throughput of memmove for various sizes from
|
|
|
|
1 byte to 32MiB, doubling every iteration and then misaligning by 0-15
|
|
|
|
bytes. The copies are done from source to destination and then back and the
|
|
|
|
source walks forward across the array and the destination walks backward by
|
|
|
|
one byte each, thus measuring misaligned accesses as well. The idea is to
|
|
|
|
avoid caching effects by copying a different string and far enough from each
|
|
|
|
other, walking in different directions so that we can measure prefetcher
|
|
|
|
efficiency (software or hardware) more closely than with a loop copying the
|
|
|
|
same data over and over, which eventually only gives us L1 cache
|
|
|
|
performance. */
|
|
|
|
|
|
|
|
#ifndef MEMMOVE_RESULT
|
|
|
|
# define MEMMOVE_RESULT(dst, len) dst
|
2017-11-20 20:26:35 +08:00
|
|
|
# define START_SIZE 128
|
2017-10-06 00:23:13 +08:00
|
|
|
# define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
|
|
|
|
# define TEST_MAIN
|
|
|
|
# define TEST_NAME "memmove"
|
|
|
|
# define TIMEOUT (20 * 60)
|
|
|
|
# include "bench-string.h"
|
|
|
|
|
2021-11-01 13:49:50 +08:00
|
|
|
#define NO_OVERLAP 0
|
|
|
|
#define PARTIAL_OVERLAP 1
|
|
|
|
#define COMPLETE_OVERLAP 2
|
|
|
|
|
2017-10-06 00:23:13 +08:00
|
|
|
IMPL (memmove, 1)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include "json-lib.h"
|
|
|
|
|
|
|
|
typedef char *(*proto_t) (char *, const char *, size_t);
|
|
|
|
|
|
|
|
static void
|
|
|
|
do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src,
|
|
|
|
size_t len)
|
|
|
|
{
|
2017-11-20 20:25:59 +08:00
|
|
|
size_t i = 0;
|
2017-10-06 00:23:13 +08:00
|
|
|
timing_t start, stop, cur;
|
|
|
|
|
|
|
|
char *dst_end = dst + MIN_PAGE_SIZE - len;
|
|
|
|
char *src_end = src + MIN_PAGE_SIZE - len;
|
|
|
|
|
|
|
|
TIMING_NOW (start);
|
2017-11-20 20:25:59 +08:00
|
|
|
/* Copy the entire buffer backwards, LEN at a time. */
|
|
|
|
for (; src_end >= src && dst <= dst_end; dst += len, src_end -= len, i++)
|
|
|
|
CALL (impl, dst, src_end, len);
|
2017-10-06 00:23:13 +08:00
|
|
|
TIMING_NOW (stop);
|
|
|
|
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
|
|
|
|
/* Get time taken per function call. */
|
2017-11-20 20:25:59 +08:00
|
|
|
json_element_double (json_ctx, (double) cur / i);
|
2017-10-06 00:23:13 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2021-11-01 13:49:50 +08:00
|
|
|
do_test (json_ctx_t *json_ctx, size_t len, int overlap, int both_ways)
|
2017-10-06 00:23:13 +08:00
|
|
|
{
|
2021-11-01 13:49:50 +08:00
|
|
|
char *s1, *s2, *tmp;
|
|
|
|
size_t repeats;
|
2017-10-06 00:23:13 +08:00
|
|
|
|
2021-11-01 13:49:50 +08:00
|
|
|
s1 = (char *) (buf1);
|
|
|
|
s2 = (char *) (buf2);
|
|
|
|
if (overlap != NO_OVERLAP)
|
|
|
|
s2 = s1;
|
|
|
|
if (overlap == PARTIAL_OVERLAP)
|
|
|
|
s2 += len / 2;
|
2017-10-06 00:23:13 +08:00
|
|
|
|
2021-11-01 13:49:50 +08:00
|
|
|
for (repeats = both_ways ? 2 : 1; repeats; --repeats)
|
|
|
|
{
|
|
|
|
json_element_object_begin (json_ctx);
|
|
|
|
json_attr_uint (json_ctx, "length", (double) len);
|
|
|
|
json_attr_string(json_ctx, "overlap",
|
|
|
|
overlap == NO_OVERLAP ? "none"
|
|
|
|
: overlap == PARTIAL_OVERLAP ? "partial"
|
|
|
|
: "complete");
|
|
|
|
json_attr_uint (json_ctx, "dst > src", (double) (s2 > s1));
|
|
|
|
json_array_begin (json_ctx, "timings");
|
|
|
|
|
|
|
|
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
|
|
do_one_test (json_ctx, impl, (char *) buf2, (char *) buf1, len);
|
2017-10-06 00:23:13 +08:00
|
|
|
|
2021-11-01 13:49:50 +08:00
|
|
|
json_array_end (json_ctx);
|
|
|
|
json_element_object_end (json_ctx);
|
|
|
|
|
|
|
|
tmp = s1;
|
|
|
|
s1 = s2;
|
|
|
|
s2 = tmp;
|
|
|
|
}
|
2017-10-06 00:23:13 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
test_main (void)
|
|
|
|
{
|
|
|
|
json_ctx_t json_ctx;
|
|
|
|
|
|
|
|
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, "memmove");
|
|
|
|
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");
|
|
|
|
/* Non-overlapping buffers. */
|
2018-05-07 23:24:31 +08:00
|
|
|
for (size_t i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
|
2017-10-06 00:23:13 +08:00
|
|
|
{
|
2021-11-01 13:49:50 +08:00
|
|
|
do_test (&json_ctx, i, NO_OVERLAP, 1);
|
|
|
|
do_test (&json_ctx, i + 1, NO_OVERLAP, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Partially-overlapping buffers. */
|
|
|
|
for (size_t i = START_SIZE; i <= MIN_PAGE_SIZE / 2; i <<= 1)
|
|
|
|
{
|
|
|
|
do_test (&json_ctx, i, PARTIAL_OVERLAP, 1);
|
|
|
|
do_test (&json_ctx, i + 1, PARTIAL_OVERLAP, 1);
|
2017-10-06 00:23:13 +08:00
|
|
|
}
|
|
|
|
|
2021-11-01 13:49:50 +08:00
|
|
|
/* Complete-overlapping buffers. */
|
2018-05-07 23:24:31 +08:00
|
|
|
for (size_t i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
|
2017-10-06 00:23:13 +08:00
|
|
|
{
|
2021-11-01 13:49:50 +08:00
|
|
|
do_test (&json_ctx, i, COMPLETE_OVERLAP, 0);
|
|
|
|
do_test (&json_ctx, i + 1, COMPLETE_OVERLAP, 0);
|
2017-10-06 00:23:13 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
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>
|