Electrical computers and digital processing systems: virtual mac – Virtual machine task or process management
Reexamination Certificate
2005-09-30
2008-08-12
An, Meng-Ai (Department: 2194)
Electrical computers and digital processing systems: virtual mac
Virtual machine task or process management
C718S104000, C719S319000, C703S020000, C703S021000
Reexamination Certificate
active
07412702
ABSTRACT:
A computer architecture includes a first operating system (COS), which may be a commodity operating system, and a kernel, which acts as a second operating system. The COS is used to boot the system as a whole. After booting, the kernel is loaded and displaces the COS from the system level, meaning that the kernel itself directly accesses predetermined physical resources of the computer. All requests for use of system resources then pass via the kernel. System resources are divided into those that, in order to maximize speed, are controlled exclusively by the kernel, those that the kernel allows the COS to handle exclusively, and those for which control is shared by the kernel and COS. In the preferred embodiment of the invention, at least one virtual machine (VM) runs via a virtual machine monitor, which is installed to run on the kernel. Each VM, the COS, and even each processor in a multiprocessor embodiment, are treated as separately schedulable entities that are scheduled by the kernel. Mechanisms for high-speed I/O between VM's and I/O devices are also included.
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Devine Scott W.
Lim Beng-Hong
Nelson Michael
An Meng-Ai
Pearce Jeffrey
VMware, Inc.
Wu Qing-Yuan
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