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Dual-Core Intel® Itanium® 2 Processor: Reference Manual Update

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Dual-Core Intel® Itanium® 2 Processor: Reference Manual Update

This document is an update to the Intel® Itanium® 2 Processor Reference Manual for Software Development and Optimization. This update is meant to give guidance on the changes that the dual-core Intel® Itanium® 2 processor, code named Montecito, brings to the existing Itanium 2 processor family.

The first dual-core Itanium 2 processor, code named Montecito, is the fourth generation of the Itanium 2 processor. Montecito builds on the strength of the previous Itanium 2 processors while bringing many new key technologies for performance and management to the Itanium processor family. Key improvements include multiple cores, multiple threads, cache hierarchy, and speculation with the addition of new instructions.

This document describes key Montecito features and how Montecito differs in its implementation of the Itanium architecture from previous Itanium 2 processors. Some of this information may not be directly applicable to performance tuning, but is certainly needed to better understand and interpret changes in application behavior on Montecito versus other Itanium architecture-based processors. Unless otherwise stated, all of the restrictions, rules, sizes, and capacities described in this document apply specifically to Montecito and may not apply to other Itanium architecture-based processors. This document assumes a familiarity with the previous Itanium 2 processors and some of the unique properties and behaviors of those. Furthermore, only differences as they relate to performance will be included here. Information about Montecito features such as error protection, Virtualization Technology, Hyper-Threading Technology, and lockstep support may be obtained in separate documents.

General understanding of processor components and explicit familiarity with Itanium processor instructions are assumed. This document is not intended to be used as an architectural reference for the Itanium architecture. For more information on the Itanium architecture, consult the Intel® Itanium® Architecture Software Developer’s Manual.

Read the full Dual-Core Intel® Itanium® 2 Processor Reference Manual Update.