The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The following cpuset parameters are defined:
cpuset.cpu_exclusive
Specifies whether the CPUs specified by
cpuset.cpus are exclusively allocated to this
CPU set and cannot be shared with other CPU sets. The default
value of 0 specifies that CPUs are not exclusively allocated. A
value of 1 enables exclusive use of the CPUs by a CPU set.
cpuset.cpus
Specifies a list of CPU cores to which a cgroup has access. For
example, the setting 0,1,5-8 allows access to
cores 0, 1, 5, 6, 7, and 8. The default setting includes all the
available CPU cores.
If you associate the cpuset subsystem with
a cgroup, you must specify a value for the
cpuset.cpus parameter.
cpuset.mem_exclusive
Specifies whether the memory nodes specified by
cpuset.mems are exclusively allocated to this
CPU set and cannot be shared with other CPU sets. The default
value of 0 specifies that memory nodes are not exclusively
allocated. A value of 1 enables exclusive use of the memory
nodes by a CPU set.
cpuset.mem_hardwall
Specifies whether the kernel allocates pages and buffers to the
memory nodes specified by cpuset.mems
exclusively to this CPU set and cannot be shared with other CPU
sets. The default value of 0 specifies that memory nodes are not
exclusively allocated. A value of 1 allows you to separate the
memory nodes that are allocated to different
cgroups.
cpuset.memory_migrate
Specifies whether memory pages are allowed to migrate between
memory nodes if the value of cpuset.mems
changes. The default value of 0 specifies that memory nodes are
not allowed to migrate. A value of 1 allows pages to migrate
between memory nodes, maintaining their relative position on the
node list where possible.
cpuset.memory_pressure
If cpuset.memory_pressure_enabled has been
set to 1, reports the memory pressure,
which represents the number of attempts per second by processes
to reclaim in-use memory. The reported value scales the actual
number of attempts up by a factor of 1000.
cpuset.memory_pressure_enabled
Specifies whether the memory pressure statistic should be gathered. The default value of 0 disables the counter. A value of 1 enables the counter.
cpuset.memory_spread_page
Specifies whether file system buffers are distributed between the allocated memory nodes. The default value of 0 results in the buffers being placed on the same memory node as the process that owns them. A value of 1 allows the buffers to be distributed across the memory nodes of the CPU set.
cpuset.memory_spread_slab
Specifies whether I/O slab caches are distributed between the allocated memory nodes. The default value of 0 results in the caches being placed on the same memory node as the process that owns them. A value of 1 allows the caches to be distributed across the memory nodes of the CPU set.
cpuset.mems
Specifies the memory nodes to which a cgroup has access. For
example, the setting 0-2,4 allows access to
memory nodes 0, 1, 2, and 4. The default setting includes all
available memory nodes. The parameter has a value of 0 on
systems that do not have a NUMA architecture.
If you associate the cpuset subsystem with
a cgroup, you must specify a value for the
cpuset.mems parameter.
cpuset.sched_load_balance
Specifies whether the kernel should attempt to balance CPU load by moving processes between the CPU cores allocated to a CPU set. The default value of 1 turns on load balancing. A value of 0 disables load balancing. Disabling load balancing for a cgroup has no effect if load balancing is enabled in the parent cgroup.
cpuset.sched_relax_domain_level
If cpuset.sched_load_balance is set to 1,
specifies one of the following load-balancing schemes.
Setting | Description |
|---|---|
| Use the system's default load balancing scheme. This is the default behavior. |
| Perform periodic load balancing. Higher numeric values enable immediate load balancing. |
| Perform load balancing for threads running on the same core. |
| Perform load balancing for cores of the same CPU. |
| Perform load balancing for all CPU cores on the same system. |
| Perform load balancing for a subset of CPU cores on a system with a NUMA architecture. |
| Perform load balancing for all CPU cores on a system with a NUMA architecture. |