PRM Product Overview

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The following figure shows the GUI and its CPU controls. A new PRM group named “customer” based
on a pSet is about to be added.
Figure 4. PRM GUI
Isolating the CPU and memory of an application
With HP-UX 11i v1 (B.11.11) and later, you can provide an application with total resource isolation,
meaning your application runs in a PRM group that has access to a fixed pool of cores and memory.
The PRM group cannot loan these resources to other PRM groups, nor can it borrow additional
resources from other PRM groups. If cores are not used, they go idle. If private memory is not used, it
is idle. However, both cores and memory remain dedicated to the application.
The application must be assigned to a pSet PRM group to provide isolation of specific CPU resources.
(FSS PRM groups guarantee CPU resources, but not specific CPU resources. As a result, FSS PRM
groups do not provide isolation.) The private memory isolation capability of the Memory Resource
Group (MRG) feature must be enabled to provide isolation of the memory resource.
Fixed and unchanging CPU and private memory resource entitlements allow for more deterministic
behavior because surplus CPU and memory resources are not available and any loaned-out resources
do not have to be reclaimed when needed.