Messages in this thread | | | Date | Thu, 22 May 2008 18:32:07 +0200 | From | Jesper Krogh <> | Subject | Re: NIU - Sun Neptune 10g - Transmit timed out reset (2.6.24) |
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David Miller wrote: > From: Matheos Worku <Matheos.Worku@Sun.COM> > Date: Fri, 09 May 2008 15:36:17 -0700 > >> I have observed TX throughput degradation (and increased CPU >> utilization) occurs with increased # of connections, when CPU count > 4 >> CPUs. I don't think it is related to the driver (or HW). > > All transmits through a device are fully serialized currently, > it's a known problem and something we plan to fix.
I google'd up this one:
http://vger.kernel.org/~davem/davem_tokyo08.pdf (slide 23+).
Does this mean that I can expect every 10G card to have this limitation under Linux? Or are some known to be better than others? (I can probably justify paying for another 10G card if I can expect to gain the last 400MB/s).
Since I cannot push more than ~600MB/s through the NIC before a single cpu is bottlenecked, it seem most likely to be this TX throughput thing I hit.
Thanks
Jesper -- Jesper
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