[Beowulf] 1.2 us IB latency?

Greg Lindahl greg.lindahl at qlogic.com
Tue Mar 27 12:28:53 EDT 2007

On Mon, Mar 26, 2007 at 06:54:58PM -0400, Mark Hahn wrote:

> or is this an example of message aggregation?

The message aggregation number is said to be run with MVAPICH 0.9.9;
message aggregation is in that version, and can't be disabled.

> also, I'm sorta amazed people keep selling (and presumably buying)
> dual-port IB cards.  doesn't that get quite expensive, switch-wise?

HPC customers don't buy them. Enterprise customers want to know that
they exist, but then they don't buy them, either. Eventually IB will
be like Fibre Channel and enterprise customers will actually buy
dual-port cards.

-- greg

Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf


More information about the Beowulf mailing list