mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 17:40:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
71 lines
2.6 KiB
Plaintext
71 lines
2.6 KiB
Plaintext
# x86 specific tunables.
|
|
# 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/>.
|
|
|
|
glibc {
|
|
cpu {
|
|
hwcaps {
|
|
type: STRING
|
|
}
|
|
x86_ibt {
|
|
type: STRING
|
|
}
|
|
x86_shstk {
|
|
type: STRING
|
|
}
|
|
x86_non_temporal_threshold {
|
|
type: SIZE_T
|
|
}
|
|
x86_rep_movsb_threshold {
|
|
type: SIZE_T
|
|
# Since there is overhead to set up REP MOVSB operation, REP
|
|
# MOVSB isn't faster on short data. The memcpy micro benchmark
|
|
# in glibc shows that 2KB is the approximate value above which
|
|
# REP MOVSB becomes faster than SSE2 optimization on processors
|
|
# with Enhanced REP MOVSB. Since larger register size can move
|
|
# more data with a single load and store, the threshold is
|
|
# higher with larger register size. Micro benchmarks show AVX
|
|
# REP MOVSB becomes faster apprximately at 8KB. The AVX512
|
|
# threshold is extrapolated to 16KB. For machines with FSRM the
|
|
# threshold is universally set at 2112 bytes. Note: Since the
|
|
# REP MOVSB threshold must be greater than 8 times of vector
|
|
# size and the default value is 4096 * (vector size / 16), the
|
|
# default value and the minimum value must be updated at
|
|
# run-time. NB: Don't set the default value since we can't tell
|
|
# if the tunable value is set by user or not [BZ #27069].
|
|
minval: 1
|
|
}
|
|
x86_rep_stosb_threshold {
|
|
type: SIZE_T
|
|
# Since there is overhead to set up REP STOSB operation, REP STOSB
|
|
# isn't faster on short data. The memset micro benchmark in glibc
|
|
# shows that 2KB is the approximate value above which REP STOSB
|
|
# becomes faster on processors with Enhanced REP STOSB. Since the
|
|
# stored value is fixed, larger register size has minimal impact
|
|
# on threshold.
|
|
minval: 1
|
|
default: 2048
|
|
}
|
|
x86_data_cache_size {
|
|
type: SIZE_T
|
|
}
|
|
x86_shared_cache_size {
|
|
type: SIZE_T
|
|
}
|
|
}
|
|
}
|