Re: netfilter performance dependent on arch

[Marek Kierdelewicz <marek@xxxxxxxxx>]

>That information is out of date.
>The bulk of the slow down in 64 bit was due to the fact that IOMMU
>(CONFIG_DMAR) was enabled. The IOMMU requires programming DMA registers
>on each packet which explains the extra overhead. After disabling
>DMA remapping, the 64 bit kernel is faster because the compiler has
>more registers and can generate better code.

Thanks a lot. That's very valuable info.

Best regards,
Marek Kierdelewicz
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