Quoting r. Grant Grundler <[EMAIL PROTECTED]>:
> FWIW, default IPoIB perf is pathetic: ~1.5-1.6Gb/s
> with the above netperf command line.

I think these systems have IOMMU, do they not?
If so, could the fact that IPoIB calls dma_map_single for each
packet be the reason it is slow? Maybe dma_map_single is slow?

-- 
MST - Michael S. Tsirkin
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