Kernel acceleration technology for virtual machine optimization

Details Kernel acceleration technology for virtual machine optimization Kernel acceleration technology for virtual machine optimization

2006-08-09

2009-06-30

Sough, Hyung S (Department: 2188)

Electrical computers and digital processing systems: memory

Addressing combined with specific memory configuration or...

Virtual machine memory addressing

C711S203000

Reexamination Certificate

active

07555592

ABSTRACT:
A system, method and computer program product for optimizing handling of guest code in a Virtual Machine include code for identifying, in the guest code, a predetermined pattern that includes privileged but unsafe instructions and an instruction that raises an exception; code for executing the guest code in a native mode; code for, upon encountering the instruction that raise the exception, transferring control to a Virtual Machine Monitor; code for emulating the pattern in the Virtual Machine Monitor; and code for rolling back the effects of privileged but unsafe instructions and any intervening instructions to ensure correct Virtual Machine Monitor context. The pattern can include, for example, a privileged but unsafe instruction, followed by safe instructions, followed by an exception raising instruction, followed by safe instructions, followed by a privileged but unsafe instruction. Optionally, the most frequently occurring patterns can be placed in a cache, for use by the Virtual Machine Monitor to verify their presence in the guest code.

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patent: 2005/0076186 (2005-04-01), Traut
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