Firmware containing Hypervisor on CMT servers with an ILOM reserve memory during boot

Asset ID:	1-79-1453086.1
Update Date:	2012-04-26
Keywords:

Solution Type Predictive Self-Healing Sure

Solution 1453086.1 : Firmware containing Hypervisor on CMT servers with an ILOM reserve memory during boot

Applies to:

Sun Fire T2000 Server
Sun Blade T6320 Server Module
Sun SPARC Enterprise T5240 Server
SPARC T4-1
Netra T3-1
Information in this document applies to any platform.

Purpose

This document discusses the use of RAM by the Hypervisor in various CMT servers

Details

The Hypervisor is low level software that controls & sub-divides platform resources. The Hypervisor was developed for the Sun Fire T2000 & is also used on the later Chip Multi-Threading (CMT) platforms. This software was split off of the Solaris kernel & performs:
    1. Virtual to Physical Address translation
    2. Controls Virtual IO resources direction to Physical Resources
    3. Has hardware error handling agents which report to FMA

Only one Hypervisor exists on the server which can control one of more Logical Domains (LDom). Thus, a portion of RAM must be reserved for use by the hypervisor to control the functionality above for all LDoms. Each type of CMT platform reserves a specific amount of RAM after boot for hypervisor, as shown below:
    Sun Fire T2000/T1000/T6300   -   128MB
    Netra T2000/CP3060 -   128MB
    Sun SPARC Enterprise T5120/T5220/T6320 -   128MB
    Netra T5220/CP3260 - 128MB
    Sun SPARC Enterprise T5140/T5240/T6340 -   128MB
    Netra T5440/T6340 -   128MB
    Sun SPARC Enterprise T5440    -   288MB
    All SPARC T3-x & T4-x platforms    - 512MB

Attachments

This solution has no attachment