A number of supported system architectures allow the behaviour of the CPU
cache to be programmed to behave differently depending on the region being
written.
The
memcontrol
utility
provides an interface to this facility, allowing CPU cache behavior to
be altered for ranges of system physical memory.
These ranges are typically power-of-2 aligned and sized, however the specific
rules governing their layout vary between architectures.
The
memcontrol
utility does not attempt to enforce these rules, however the system will
reject any attempt to set an illegal combination.
|
| list
|
List range slots.
|
| -a
|
| |
List all range slots, even those that are inactive.
|
|
| set
|
Set memory range attributes.
|
| -b base
|
| |
Memory range base address.
|
| -l length
|
| |
Length of memory range in bytes, power of 2.
|
| -o owner
|
| |
Text identifier for this setting (7 char max).
|
| attribute
|
| |
Attributes applied to this range; combinations of
force, uncacheable, write-combine, write-through, write-back,
and
write-protect.
|
|
| clear
|
Clear memory range attributes.
Ranges may be cleared by owner or by
base/length combination.
To clear based on ownership:
|
| -o owner
|
| |
All ranges with this owner will be cleared.
|
|
To clear based on the base/length combination:
| -b base
|
| |
Memory range base address.
|
| -l length
|
| |
Length of memory range in bytes, power of 2.
|
|
Base and length must exactly match an existing range.
