diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/generic/adaptive_spin_count.h | 22 | ||||
| -rw-r--r-- | sysdeps/nptl/dl-tunables.list | 27 |
2 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/generic/adaptive_spin_count.h b/sysdeps/generic/adaptive_spin_count.h new file mode 100644 index 0000000000..6b30a2af81 --- /dev/null +++ b/sysdeps/generic/adaptive_spin_count.h @@ -0,0 +1,22 @@ +/* Maximum adaptive spin count by default + Copyright (C) 2018 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 + <http://www.gnu.org/licenses/>. */ + +/* The choice of 100 spins for the default spin count for an adaptive spin + is a completely arbitrary choice that has not been evaluated thoroughly + using modern hardware. */ +#define DEFAULT_ADAPTIVE_COUNT 100 diff --git a/sysdeps/nptl/dl-tunables.list b/sysdeps/nptl/dl-tunables.list new file mode 100644 index 0000000000..beebd5a9a4 --- /dev/null +++ b/sysdeps/nptl/dl-tunables.list @@ -0,0 +1,27 @@ +# Copyright (C) 2018 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 +# <http://www.gnu.org/licenses/>. + +glibc { + pthread { + mutex_spin_count { + type: INT_32 + minval: 0 + maxval: 32767 + default: 100 + } + } +} |