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Diffstat (limited to 'Documentation/admin-guide/cgroup-v1/cpusets.rst')
| -rw-r--r-- | Documentation/admin-guide/cgroup-v1/cpusets.rst | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/Documentation/admin-guide/cgroup-v1/cpusets.rst b/Documentation/admin-guide/cgroup-v1/cpusets.rst index 5d844ed4df69..c7909e5ac136 100644 --- a/Documentation/admin-guide/cgroup-v1/cpusets.rst +++ b/Documentation/admin-guide/cgroup-v1/cpusets.rst @@ -10,7 +10,7 @@ Written by Simon.Derr@bull.net - Portions Copyright (c) 2004-2006 Silicon Graphics, Inc. - Modified by Paul Jackson <pj@sgi.com> -- Modified by Christoph Lameter <cl@linux.com> +- Modified by Christoph Lameter <cl@gentwo.org> - Modified by Paul Menage <menage@google.com> - Modified by Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> @@ -179,7 +179,7 @@ files describing that cpuset: - cpuset.mem_hardwall flag: is memory allocation hardwalled - cpuset.memory_pressure: measure of how much paging pressure in cpuset - cpuset.memory_spread_page flag: if set, spread page cache evenly on allowed nodes - - cpuset.memory_spread_slab flag: if set, spread slab cache evenly on allowed nodes + - cpuset.memory_spread_slab flag: OBSOLETE. Doesn't have any function. - cpuset.sched_load_balance flag: if set, load balance within CPUs on that cpuset - cpuset.sched_relax_domain_level: the searching range when migrating tasks @@ -568,7 +568,7 @@ on the next tick. For some applications in special situation, waiting The 'cpuset.sched_relax_domain_level' file allows you to request changing this searching range as you like. This file takes int value which -indicates size of searching range in levels ideally as follows, +indicates size of searching range in levels approximately as follows, otherwise initial value -1 that indicates the cpuset has no request. ====== =========================================================== @@ -581,6 +581,11 @@ otherwise initial value -1 that indicates the cpuset has no request. 5 search system wide [on NUMA system] ====== =========================================================== +Not all levels can be present and values can change depending on the +system architecture and kernel configuration. Check +/sys/kernel/debug/sched/domains/cpu*/domain*/ for system-specific +details. + The system default is architecture dependent. The system default can be changed using the relax_domain_level= boot parameter. @@ -719,7 +724,7 @@ There are ways to query or modify cpusets: cat, rmdir commands from the shell, or their equivalent from C. - via the C library libcpuset. - via the C library libcgroup. - (http://sourceforge.net/projects/libcg/) + (https://github.com/libcgroup/libcgroup/) - via the python application cset. (http://code.google.com/p/cpuset/) |