DDFA support
The DDFA (Dynamic Domains For Applications) software is a Bull tool that can be used on the Linux operating system for simulating the partitioning of a multi-CPU machine at application level.
The "Dynamic Domains" software enables resources to be reserved for a given application, user, etc., while resources dedicated to lower priority tasks are being limited.
Principle
The "Dynamic Domains" software enables resources to be reserved for a given application, user, etc., with resources usable by lower priority tasks being limited. In the example below, without domain, all resources will be shared among the various processes.
With domains, lower priority processes will share the resources of domain "default" while domain "D1" resources will be reserved for application "A", application "B" will be assigned to domain "D2", etc.
Resources can be dynamically assigned to the domains according to the usage level ("dynamic domains" notion). The dynamic management of domains is carried out by the monitoring daemon (see Appendix C: Simulation of dynamic domains).
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