Low latency multicast for infiniband® host channel...

Details Low latency multicast for infiniband® host channel... Low latency multicast for infiniband® host channel...

2011-03-01

2011-03-01

Pezzlo, John (Department: 2465)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S238000, C370S432000, C709S238000

Reexamination Certificate

active

07899050

ABSTRACT:
A low latency multicasting receive and send apparatus and method comprising low latency receive and send queues. In an InfiniBand® network each destination group of nodes (recipients) is identified by a unique Global ID (GID)+Local ID (LID). Each node whose ports are part of a multicast group identify themselves via a LID which identifies participating ports. When a switch receives such a multicast packet with a multicast LID in the packet's DLID field it replicates the packet to each of the designated ports. Each destination adapter at a receiving node receives the multicast packet and distributes copies of the packet to QPs in the host system that are registered for the multicast address.

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