09-12-2008
Many thanks Jim, it was on SuSe but I managed to fix it just after I posted haha
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LEARN ABOUT FREEBSD
memcontrol
MEMCONTROL(8) BSD System Manager's Manual MEMCONTROL(8)
NAME
memcontrol -- control system cache behaviour with respect to memory
SYNOPSIS
memcontrol list [-a]
memcontrol set -b base -l length -o owner attribute
memcontrol clear -o owner
memcontrol clear -b base -l length
DESCRIPTION
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 mem-
ory.
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.
SEE ALSO
mem(4)
BSD
September 15, 2002 BSD