Grant> Good news: Topspin firmware 3.3.2 can run netperf w/MSI-X on ia64
too
>Bad news: I'm getting weak perf #s on the ZX1 boxes (~1580 Mbps ==
~200MB/s)
I found this paper about 10gig ethernet on Itanium where they were
not seeing that good of performance and were able to increase it by
changing some BIOS setting that controlled PCI-X burst size. Perhaps
this
might also help IB, although they state in the paper that this seemed to
help more with larger MTUs, so with our 2K MTU, not sure if it will help
or not.
Yes it will help all high-speed I/O devices. The default firmware settings focus on creating a balanced environment across all slots to avoid any perceived QoS issues. Changing the parameters improves performance but could result in minor HOL blocking for completions. The internal interconnect used on these platforms is a serial interface (dual simplex) that has been shipping for many years now and has evolved over time to improve performance and capabilities.
http://www.supercomp.org/sc2003/paperpdfs/pap293.pdf#search='10%20gigabi
t%20ethernet%20performance%20on%20Itanium'
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