[Beowulf] interconnect and compiler ?

[Greg Lindahl]

On Thu, Jan 29, 2009 at 10:28:39AM -0500, Mark Hahn wrote:

> iirc, there was only a small latency difference between HTX and PCI-E
> versions of Infinipath.

There was a big overhead difference. But the HTX product is retired,
and the current DDR PCIe Infiniband chip has overhead similar to the
HTX chip.

I guess you must run a lot of 2-node 2-core jobs, if you're so
concerned with ping-pong latency ;-) ;-)

-- greg