The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2008
Filed:
Sep. 20, 2006
Lucien Mirabeau, Tucson, AZ (US);
Tiep Q. Pham, Tucson, AZ (US);
Lucien Mirabeau, Tucson, AZ (US);
Tiep Q. Pham, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In response to multiple data transfer requests from an application, a data definition (DD) chain is generated. The DD chain is divided into multiple DD sub-blocks by determining a bandwidth of channels (BOC) and whether the BOC is less than the DD chain. If so, the DD chain is divided by the available DMA engines. If not, the DD chain is divided by an optimum atomic transfer unit (OATU). If the division yields a remainder, the remainder is added to a last DD sub-block. If the remainder is less than a predetermined value, the size of the last DD sub-block is set to the OATU plus the remainder. Otherwise, the size of the last DD sub-block is set to the remainder. The DD sub-blocks are subsequently loaded into a set of available DMA engines. Each of the available DMA engines performs data transfers on a corresponding DD sub-block until the entire DD chain has been completed.