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a4c3f5f46e
The patch adds two new macros, TUNABLE_GET_DEFAULT and TUNABLE_IS_INITIALIZED, here the former get the default value with a signature similar to TUNABLE_GET, while the later returns whether the tunable was set by the environment variable. Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com> Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
176 lines
3.2 KiB
Plaintext
176 lines
3.2 KiB
Plaintext
# Copyright (C) 2016-2023 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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# Allowed attributes for tunables:
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#
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# type: Defaults to STRING
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# minval: Optional minimum acceptable value
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# maxval: Optional maximum acceptable value
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# default: Optional default value (if not specified it will be 0 or "")
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# env_alias: An alias environment variable
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glibc {
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malloc {
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check {
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type: INT_32
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minval: 0
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maxval: 3
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env_alias: MALLOC_CHECK_
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}
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top_pad {
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type: SIZE_T
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env_alias: MALLOC_TOP_PAD_
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default: 131072
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}
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perturb {
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type: INT_32
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minval: 0
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maxval: 0xff
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env_alias: MALLOC_PERTURB_
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}
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mmap_threshold {
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type: SIZE_T
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env_alias: MALLOC_MMAP_THRESHOLD_
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}
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trim_threshold {
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type: SIZE_T
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env_alias: MALLOC_TRIM_THRESHOLD_
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}
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mmap_max {
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type: INT_32
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env_alias: MALLOC_MMAP_MAX_
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minval: 0
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}
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arena_max {
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type: SIZE_T
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env_alias: MALLOC_ARENA_MAX
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minval: 1
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}
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arena_test {
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type: SIZE_T
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env_alias: MALLOC_ARENA_TEST
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minval: 1
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}
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tcache_max {
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type: SIZE_T
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}
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tcache_count {
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type: SIZE_T
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}
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tcache_unsorted_limit {
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type: SIZE_T
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}
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mxfast {
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type: SIZE_T
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minval: 0
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}
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hugetlb {
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type: SIZE_T
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minval: 0
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}
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}
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cpu {
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hwcap_mask {
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type: UINT_64
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env_alias: LD_HWCAP_MASK
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default: HWCAP_IMPORTANT
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}
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}
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elision {
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enable {
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type: INT_32
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minval: 0
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maxval: 1
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}
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skip_lock_busy {
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type: INT_32
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default: 3
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minval: 0
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}
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skip_lock_internal_abort {
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type: INT_32
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default: 3
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minval: 0
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}
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skip_lock_after_retries {
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type: INT_32
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default: 3
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minval: 0
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}
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tries {
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type: INT_32
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default: 3
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minval: 0
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}
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skip_trylock_internal_abort {
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type: INT_32
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default: 3
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minval: 0
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}
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}
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rtld {
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nns {
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type: SIZE_T
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minval: 1
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maxval: 16
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default: 4
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}
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optional_static_tls {
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type: SIZE_T
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minval: 0
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default: 512
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}
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}
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mem {
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tagging {
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type: INT_32
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minval: 0
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maxval: 255
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}
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decorate_maps {
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type: INT_32
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minval: 0
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maxval: 1
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}
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}
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rtld {
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dynamic_sort {
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type: INT_32
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minval: 1
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maxval: 2
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default: 2
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}
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}
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gmon {
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minarcs {
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type: INT_32
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minval: 50
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default: 50
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}
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maxarcs {
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type: INT_32
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minval: 50
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default: 1048576
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}
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}
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}
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