CPU




	NOTE: Processor Terminology Processing resources under vPars, both as input arguments and command outputs, are described as “CPUs.” For multi-core processors such as the PA-8800 and dual-core Intel Itanium processors, the term “CPU” is synonymous with “core.” The term “processor” refers to the hardware component that plugs into a processor socket. Therefore a single processor can have more than one core, and vPars commands will refer to the separate cores as distinct “CPUs,” each with its own hardware path. Two vPars terms pre-date multi-core processors, so they are exceptions to this terminology: “Boot processor,” which refers to the CPU (that is, core) on which the OS kernel of the virtual partition was booted. “Cell local processor (CLP),” which refers to a CPU (core) on a specified cell. For more information on dual-core processors, see “CPU: Dual-Core Processors”.

CPU migration refers to adding CPUs to and deleting CPUs from a virtual partition. Dynamic CPU migration refers to migrating CPUs while the target virtual partition is running. vPars allows the assignment of most CPUs while the virtual partitions are running.

For vPars A.04.01 and later, the two types of CPUs are Boot Processor and dynamic CPUs. This discussion begins at “CPU: Boot Processor and Dynamic CPU Definitions ”. The bound and unbound CPU types in vPars A.03.xx and earlier no longer apply.

For additional information on using iCAP (formerly known as iCOD), including temporary-iCAP CPUs with vPars, see “CPU: Using iCAP (Instant Capacity on Demand) with vPars (vPars A.04.xx and iCAP B.07)”.




	NOTE: Using vPars A.03.xx and Earlier Syntax on a vPars A.04.xx System Although not recommended under most circumstances, you can still use the vPars A.03.xx CPU syntax on vPars A.04.xx systems. However, the concepts and rules of boot processors and dynamic CPUs in A.04.xx will apply because the concepts and rules of bound and unbound CPUs in A.03.xx no longer apply. For more information, see “CPU: Syntax, Rules, and Notes”.

CPU

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