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Repeating Direct Memory Access Data Transfer Operations for Compute Nodes in a Parallel Computer

United States Patent Application

20090031001
A1
View the Complete Application at the US Patent & Trademark Office
Methods, apparatus, and products are disclosed for repeating DMA data transfer operations for nodes in a parallel computer that include: receiving, by a DMA engine on an origin node, a RGET data descriptor that specifies a DMA transfer operation data descriptor and a second RGET data descriptor, the second RGET data descriptor also specifying the DMA transfer operation data descriptor; creating, in dependence upon the RGET data descriptor, an RGET packet that contains the DMA transfer operation data descriptor and the second RGET data descriptor; processing the DMA transfer operation data descriptor included in the RGET packet, including performing a DMA data transfer operation between the origin node and a target node in dependence upon the DMA transfer operation data descriptor; and processing the second RGET data descriptor included in the RGET packet, thereby performing again the DMA transfer operation in dependence upon the DMA transfer operation data descriptor.
Archer, Charles J. (Rochester, MN), Blocksome, Michael A. (Rochester, MN)
11/ 829,334
July 27, 2007
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0001] This invention was made with Government support under Contract No. B554331 awarded by the Department of Energy. The Government has certain rights in this invention.