[openib-general] Problem with 2.4.24 and gen1

[Tziporet Koren]

Tavor mode and native Arbel mode have the same performance.
The main change for the native mode is the ability to work without attached
DDR and use the system memory instead.

Tziporet

-----Original Message-----
From: Roland Dreier [mailto:roland at topspin.com]
Sent: Monday, November 01, 2004 5:30 PM
To: Ken MacInnis
Cc: Tziporet Koren; Tech_Support; openib-general at openib.org
Subject: Re: [openib-general] Problem with 2.4.24 and gen1


    Ken> Also, another question I have is fairly naive -- at what
    Ken> point are the Lion Cub (PCI Express) cards supported in the
    Ken> OpenIB stack?  I seem to remember the Tavor code supporting
    Ken> them inherently but in a non-efficient manner if native code
    Ken> wasn't used.

Lion Cub aka Arbel aka PCI Ex HCA is supported in Tavor compatibility
mode right now by the mthca driver.  I just received firmware and
documentation for native mode last week, so support for that will be
"coming soon."  However Tavor mode is not really much of a performance
hit -- on a suitable motherboard you should still be able to hit (bus
limited) 20 Gb/sec of throughput.

 - Roland
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