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:
Apr. 09, 2013
Filed:
Dec. 17, 2009
Lakshminarayana B. Arimilli, Austin, TX (US);
Bernard C. Drerup, Austin, TX (US);
Jody B. Joyner, Austin, TX (US);
Paul F. Lecocq, Cedar Park, TX (US);
Hanhong Xue, Wappingers Falls, NY (US);
Lakshminarayana B. Arimilli, Austin, TX (US);
Bernard C. Drerup, Austin, TX (US);
Jody B. Joyner, Austin, TX (US);
Paul F. Lecocq, Cedar Park, TX (US);
Hanhong Xue, Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A mechanism is provided for collective acceleration unit tree flow control forms a logical tree (sub-network) among those processors and transfers 'collective' packets on this tree. The system supports many collective trees, and each collective acceleration unit (CAU) includes resources to support a subset of the trees. Each CAU has limited buffer space, and the connection between two CAUs is not completely reliable. Therefore, to address the challenge of collective packets traversing on the tree without colliding with each other for buffer space and guaranteeing the end-to-end packet delivery, each CAU in the system effectively flow controls the packets, detects packet loss, and retransmits lost packets.