HP-UX Workload Manager User's Guide

New in this edition

This section lists the new or changed functionality for WLM A.03.02 and

WLM A.03.02.02. WLM A.03.02 supports HP-UX 11i v1 (B.11.11) and

HP-UX 11i v2 (B.11.23). WLM A.03.02.02 supports HP-UX 11i v3

(B.11.31).

• WLM A.03.02.02 supports HP-UX 11i v3 (B.11.31).

• WLM A.03.02.02 supports the logical CPU (Hyper-Threading)

feature, which is available starting with HP-UX 11i v3 (B.11.31) for

processors designed to support the feature and that have the

appropriate firmware installed. A logical CPU is an execution thread

contained within a core. Each core with Hyper-Threading enabled

can contain multiple logical CPUs. WLM supports the

Hyper-Threading feature for PSET-based groups. WLM

automatically sets the Hyper-Threading state for the default PSET

to optimize performance. (The default PSET, also known as PSET 0,

is where all FSS groups reside.) When new PSETs are created, they

inherit the Hyper-Threading state that the system had before WLM

was activated (inheritance is based on the system state prior to WLM

activation because WLM may change the Hyper-Threading setting

for the default PSET to optimize performance). Cores can be moved

from one partition to another and will take on the Hyper-Threading

state of their destination PSET. You can override the default

Hyper-Threading state of cores assigned to a specific PSET group;

you can also modify the Hyper-Threading state of the system.

(Modifications to the Hyper-Threading state should not be made

while WLM is running.) For more information, see “Specifying

workload groups (optional)” on page 159 and wlmconf(4).

• When referring to hardware, CPUs are now referred to as cores in

the documentation and in WLM displays or data reports. A core is

the actual data-processing engine within a processor. A processor

might have multiple cores, and a core might support multiple

execution threads through Hyper-Threading. The term “CPU” is still

used when referring to concepts such as “CPU resources” or “CPU

utilization”; whenever the number of physical processing devices is

reported by WLM or discussed by the documentation, the number

will be stated explicitly in terms of cores. Note also that PSET sizes

and Instant Capacity (iCAP) partitions are now expressed in terms of

cores.