Ibm I5/OS Manuale Utente Scaricare il pdf (Pagina 17)

iSeries. mySeries.

Processor Concepts

About Simultaneous Multi-Threading (SMT)

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SMT is a technology that allows a single CPU to be seen logically as 2 logical CPU

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Physical processor

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Logical processors

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SMT allows 2 threads to run simultaneously on the same processor

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Using different execution units, or “pipes”

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SMT optimizes the usage of the 7 execution units of a PowerPC processor

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Hypervisor only deals with physical processors

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Each operating system can use the physical processor as its needs

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SMT can be used or not ... according partition’s operating system configuration

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For i5/OS, refer to system value QPRCMLTTSK

iSeries. mySeries.

Logical Partitions on the IBM Power5

Resources Management Concepts

Main Storage

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 58 59

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Ibm I5/OS Manuale Utente Pagina 17