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Update os/doc/init.txt with affinity information

This commit is contained in:
Norman Feske 2013-08-08 16:34:21 +02:00
parent 35723d813d
commit c4627fab44
1 changed files with 28 additions and 0 deletions
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os/doc/init.txt
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@ -252,6 +252,34 @@ any sub configuration can be placed in a separate file specified via the
! </start>
Assigning subsystems to CPUs
============================
The assignment of subsystems to CPU nodes consists of two parts, the
definition of the affinity space dimensions as used for the init process, and
the association sub systems with affinity locations (relative to the affinity
space). The affinity space is configured as a sub node of the config node. For
example, the following declaration describes an affinity space of 4x2:
! <config>
! ...
! <affinity_space width="4" height="2" />
! ...
! </config>
Subsystems can be constrained to parts of the affinity space using the
'<affinity>' sub node of a '<start>' entry:
! <config>
! ...
! <start name="loader">
! <affinity xpos="0" ypos="1" width="2" height="1" />
! ...
! </start>
! ...
! </config>
Priority support
================