mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
b630be0922
Created tunable glibc.pthread.stack_hugetlb to control when hugepages can be used for stack allocation. In case THP are enabled and glibc.pthread.stack_hugetlb is set to 0, glibc will madvise the kernel not to use allow hugepages for stack allocations. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* Pthread mutex tunable parameters.
|
|
Copyright (C) 2018-2023 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 TUNABLE_NAMESPACE pthread
|
|
#include <pthread_mutex_conf.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <unistd.h> /* Get STDOUT_FILENO for _dl_printf. */
|
|
#include <elf/dl-tunables.h>
|
|
#include <nptl-stack.h>
|
|
|
|
struct mutex_config __mutex_aconf =
|
|
{
|
|
/* The maximum number of times a thread should spin on the lock before
|
|
calling into kernel to block. */
|
|
.spin_count = DEFAULT_ADAPTIVE_COUNT,
|
|
};
|
|
libc_hidden_data_def (__mutex_aconf)
|
|
|
|
static void
|
|
TUNABLE_CALLBACK (set_mutex_spin_count) (tunable_val_t *valp)
|
|
{
|
|
__mutex_aconf.spin_count = (int32_t) (valp)->numval;
|
|
}
|
|
|
|
static void
|
|
TUNABLE_CALLBACK (set_stack_cache_size) (tunable_val_t *valp)
|
|
{
|
|
__nptl_stack_cache_maxsize = valp->numval;
|
|
}
|
|
|
|
static void
|
|
TUNABLE_CALLBACK (set_stack_hugetlb) (tunable_val_t *valp)
|
|
{
|
|
__nptl_stack_hugetlb = (int32_t) valp->numval;
|
|
}
|
|
|
|
void
|
|
__pthread_tunables_init (void)
|
|
{
|
|
TUNABLE_GET (mutex_spin_count, int32_t,
|
|
TUNABLE_CALLBACK (set_mutex_spin_count));
|
|
TUNABLE_GET (stack_cache_size, size_t,
|
|
TUNABLE_CALLBACK (set_stack_cache_size));
|
|
TUNABLE_GET (stack_hugetlb, int32_t,
|
|
TUNABLE_CALLBACK (set_stack_hugetlb));
|
|
}
|