[EMAIL PROTECTED] wrote on Thu, 24 May 2007 14:22 -0500:
> Is there any interest in being able to configure the MTU settings for
> the BMI-level devices via a config-file parameter?
>
> For my current IB setup, I can get roughly 1/3rd (2Gbit/s+) better
> performance by using an MTU of 2048 instead of the default of 1024, so
> we do have a use for larger mtu's here. At this point the value is
> hardcoded in the BMI devices, and would require a rebuild of the
> binaries, so there would need to be some work done to get this to work
> for each of the transport devices. It would be an interesting endeavor
> to see the different performance implications this might bring about.
Apparently each NIC has a favorite MTU for performance. Original
mthca were good at 1k and lousy at 2k. The new NICs (and yours
apparently) are good at 2k. I guess a config file param is the way
to go. Do you know how to go about this? If you spin a patch, I'll
make it pretty and put it into the tree.
-- Pete
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