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System and method for transferring updates from virtual frame buffers

  • US 8,073,990 B1
  • Filed: 09/23/2009
  • Issued: 12/06/2011
  • Est. Priority Date: 09/23/2008
  • Status: Active Grant
First Claim
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1. A method for transferring data from a first computer memory of a computer system to a second computer memory of the computer system, at least a portion of the method being performed by the computer system comprising at least one processor, the method comprising:

  • (i) initializing a descriptor with a description of physical addressing of a first two dimensional (2D) section of a first 2D data array of the first computer memory;

    (ii) updating a mask associated with the descriptor with an indication for transferring image data from a first 2D sub-section of the first 2D section to the second computer memory, the mask and the image data managed by an application on a first virtual machine of the computer system, the application isolated from the physical addressing of the first 2D section;

    (iii) responsive to the updated mask, (a) determining physical addresses of the first 2D sub-section based on the description of physical addressing, and (b) transferring the image data from the first 2D sub-section to the second computer memory; and

    (iv) clearing at least a portion of the updated mask to indicate completion of transferring the image data to the second computer memory.

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