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:
Oct. 12, 2010
Filed:
Dec. 20, 2004
Robert S. Blackmore, Poughkeepsie, NY (US);
Fu Chung Chang, Rhinebeck, NY (US);
Piyush Chaudhary, Fishkill, NY (US);
Kevin J. Gildea, Bloomington, NY (US);
Jason E. Goscinski, Snoqualmie, WA (US);
Rama K. Govindaraju, Hopewell Junction, NY (US);
Donald G. Grice, Gardiner, NY (US);
Leonard W. Helmer, Jr., Stone Ridge, NY (US);
Patricia E. Heywood, Hopewell Junction, NY (US);
Peter H. Hochschild, New York, NY (US);
John S. Houston, Hopewell Junction, NY (US);
Chulho Kim, Poughkeepsie, NY (US);
Steven J. Martin, Poughkeepsie, NY (US);
Robert S. Blackmore, Poughkeepsie, NY (US);
Fu Chung Chang, Rhinebeck, NY (US);
Piyush Chaudhary, Fishkill, NY (US);
Kevin J. Gildea, Bloomington, NY (US);
Jason E. Goscinski, Snoqualmie, WA (US);
Rama K. Govindaraju, Hopewell Junction, NY (US);
Donald G. Grice, Gardiner, NY (US);
Leonard W. Helmer, Jr., Stone Ridge, NY (US);
Patricia E. Heywood, Hopewell Junction, NY (US);
Peter H. Hochschild, New York, NY (US);
John S. Houston, Hopewell Junction, NY (US);
Chulho Kim, Poughkeepsie, NY (US);
Steven J. Martin, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a multinode data processing system in which nodes exchange information over a network or through a switch, a structure and mechanism is provided within the realm of Remote Direct Memory Access (RDMA) operations in which DMA operations are present on one side of the transfer but not the other. On the side in which the transfer is not carried out in DMA fashion, transfer processing is carried out under program control; this is in contrast to the transfer on the DMA side which is characteristically carried out in hardware. Usage of these combination processes is useful in programming situations where RDMA is carried out to or from contiguous locations in memory on one side and where memory locations on the other side is noncontiguous. This split mode of transfer is provided both for read and for write operations.