Arris International, Inc.

Sicortex, Inc.

David Gingold

Lawrence Colm Stewart

Judson S Leonard

Wilson E Sawyer

Stuart Green

Kevn Neeley

A multi-node computer system with a plurality of interconnected processing nodes, including a method of using DMA engines without page locking by the operating system. The method includes a sending node with a first virtual address space and a receiving node with a second virtual address space. Performing a DMA data transfer operation between the first virtual address space on the sending node and the second virtual address space on the receiving node via a DMA engine, and if the DMA operation refers to a virtual address within the second virtual address space that is not in physical memory, causing the DMA operation to fail. The method includes causing the receiving node to map the referenced virtual address within the second virtual address space to a physical address, and causing the sending node to retry the DMA operation, wherein the retried DMA operation is performed without page locking.

System and method for remote direct memory access without page locking by the operating system

An active optical network switch having a switch module, a plurality of uplink modules and a plurality of downlink modules connected to a backplane for connecting the modules and passing signals among them. A CPU module assists in managing the routing of traffic signals by the switch module; said modules and backplane are enclosed in an environmentally hardened housing. Six downlink modules may include four downlink ports each, for connecting the switch to twenty-four subscribers. Multiple switches may be daisy-chained together; one being a master and the remainder being slaves, to increase the number of subscribers that are served by an uplink fiber/pair. Dense Wavelength Division Multiplexing may aggregate traffic signals between many subscribers and a CO/head end along a single backhaul fiber. Switch software may provide 'network edge' functions including traffic shaping, policing, filtering and aggregation, and address control.

Scalable method and architecture for an active switch defining a network edge having multiple uplinks and using wavelength division multiplexing

Growing community of inventors

Somerville, MA, United States of America

David Gingold