86 lines
5.7 KiB
HTML
86 lines
5.7 KiB
HTML
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<!DOCTYPE html
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<meta name="DC.Title" content="Logical partition concept: Processor" />
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<meta name="abstract" content="A processor is a device that executes programmed instructions." />
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<meta name="description" content="A processor is a device that executes programmed instructions." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<title>Logical partition concept: Processor</title>
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</head>
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<body id="rzaitprocessor"><a name="rzaitprocessor"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Logical partition concept: Processor</h1>
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<div><p>A processor is a device that executes programmed instructions. </p>
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<p>Logical partitions support dedicated processors and shared processors.
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The more processors you have the greater number of concurrent operations being
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executed at any given time. Your processor sends and receives information
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from the different parts of the system (from hardware and software).</p>
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<p>Processors can work as a group to decrease the computing time that an operation
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requires. The fewer the number of processors in a system the longer the amount
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of computing time needed. If more processors are allocated to a partition,
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the greater the number of concurrent operations.</p>
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<p>You measure the total system performance in the Commercial Processing Workload
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(CPW) that is unique for each model. The relative performance of a partition
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equals the CPW for the entire system times the number of processors in a logical
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partition divided by the total number of processors on the system.</p>
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<p>Relative logical partition performance = (CPW) (# processors in the logical
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partition/total # of processors).</p>
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<p>From the Configure Logical Partition window, you can view all of the system
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processor hardware resources. From the primary partition, you can also see
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which processors the logical partitions own.</p>
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<p>If a processor fails while the server is running, then all the logical
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partitions on that server (not just the one with the faulty processor) fail.
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If a processor failure is detected during the system restart (IPL), the logical
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partition configuration manager will attempt to honor the minimum processor
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setting for all partitions. Once minimums have been met, all remaining resources
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are distributed, proportional to the intended allocation, among the appropriate
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partitions. If the partition minimums cannot be met, all resources are left
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in the primary partition and no secondary partitions are started. An entry
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is placed in the primary partition Product Activity Log (PAL) with a System
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Reference Code (SRC) of B6005342 to indicate that the minimum configuration
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could not be met. The primary partition PAL also contains one or more entries
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to indicate the failing hardware. You can view processor errors in the Product
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Activity Log (PAL) on the primary partition.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzaitdedproc.htm">Logical partition concept: dedicated processor</a></strong><br />
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Dedicated processors are whole processors that are used exclusively by the partition to which they are assigned. The dedicated processor handles the processing for a specific logical partition.</li>
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<li class="ulchildlink"><strong><a href="rzaitshareproc.htm">Logical partition concept: shared processor pool</a></strong><br />
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The shared processing pool allows you to assign partial processors to a logical partition.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaithardwarereq.htm" title="Understand the basic hardware concepts and requirements to partition your server.">Hardware for logical partitions</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaitmainstore.htm" title="Processors use memory to temporarily hold information.">Logical partition concept: memory</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzaitpal.htm" title="Use Dedicated Service Tools (DST) or System Service Tools (SST) to find system reference codes for logical partitions.">View the Product Activity Log (PAL) for logical partitions</a></div>
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</div>
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</div>
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</body>
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