XBow

From Nekochan
Revision as of 00:10, 6 October 2011 by Regan russell (Talk | contribs) (Cross Bow)

Jump to: navigation, search

Cross Bow

An interconnect ASIC on SGIs. The xbow driver provides support for the XIO bus found on SGI ‘ccNUMA' designs, such as the Octane (IP30) and Origin (IP27 and IP35) families, as well as related systems such as Onyx 3xx and Tezro. XIO components are called ‘widgets' and contain either I/O devices, processors, or memory.

A XIO bus supports up to 16 widgets, but the existing designs only use up to 8.

Special ‘hub' widgets allow several XIO buses to be interconnected, expanding the capacity of a given system, and allowing complex multi-node systems to be built.


Onyx2

Chips.diagram-o2k.gif


Xbow is a crossbar switch a many to many switch

Chap1.overview-24.gif Crossbar.gif

IO.block.diag.gif

Xbow between hub and PCI widgets

Asic.protocols.gif

XBow in the midplane of Onyx2 and Orign 2000

Func.location.crossbow.gif

XBow in a field of widgets

Chap3.ASICs-10.gif

See also