International Business Machines Corporation

International Business Corporation

Wei Kuo

Robert Paul Stelzer

James Anthony Pafumi

Charles Ray Johns

Mark Richard Nutter

George Francis Ramsay, Iii

John Paul Harvey

Debra A Kipping

Dac D Nguyen

According to one embodiment of the present invention, the illustrative embodiments provide a computer implemented method, apparatus, and computer program product for configuring devices. Device information for a plurality of devices is retrieved from an object data manager. A determination is made as to whether a keyboard-video-mouse environment exists. If a keyboard-video-mouse environment does not exist, each device in a plurality of devices is configured to either an available state or a defined state. If a keyboard-video-mouse environment exists, each device in the plurality of devices is configured to the available state. A list of all enumerated devices is requested and a determination is made as to whether a particular device is in the list of enumerated devices. If the particular device is not in the list of enumerated devices, a pseudo device is added to the list to form a modified list of all enumerated devices.

USB devices pre-configuration for KVM switch

A method, apparatus and computer instructions for storing data relating to the switch in a context switch history containing a number of prior context switches occurring prior to a current context. The storing of data occurs in response to a change in context for a direct memory access resource. Portions of the direct memory access chain of requests are freed using the context switch history to form freed portions, wherein the freed portions are reused for requests.

Method and apparatus for managing context switches using a context switch history table

A method, apparatus, and computer instructions for managing direct memory access transfers. Monitoring is performed for an event to pass ownership of a direct memory access resource to a new thread. A buffer of the new thread is added by an operating system component to the end of a direct memory access chain of requests from the current thread. The addition of this buffer to the end of a direct memory access chain provides an anchor point for the new thread to add additional requests for the direct memory access resource.

Method and apparatus for efficient sharing of DMA resource

A method and apparatus in a data processing system for processing graphics data. A set of clip areas defining a window for use in clipping graphics data is identified in which a portion of the graphics data is obscured. A clip area in a first hardware clipper is set, wherein the clip area encompasses the window to process the graphics data. The graphics data within the first clip area is graphics data to be displayed. A no clip area is set in a second hardware clipper, wherein the no clip area encompasses the portion and wherein which graphics data in the second clip area is to remain undisplayed. The graphics data is sent to the first hardware clipper and the second hardware clipper.

Method and apparatus for graphics window clipping management in a data processing system

A method and apparatus in a data processing system for asynchronous context switching. Requests of graphics processes are received to process graphics data for display in a queue in the graphics adapter. A current context is switched for a first graphics process to a new context for a second graphics process only in response to requests received in the queue. In this manner, the graphics adapter is able to continuously process commands in the queue instead of waiting for new commands to be sent after each context switch.

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Austin, TX, United States of America

Wei Kuo