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FFPF on the IXP1200

The \ensuremath{PBuf} in the IXP implementation resides in SDRAM on the network card. FFPF maps the packet buffer as well as the other FFPF buffers into the host address space to support zero-copy functionality. A separate control structure, consisting of packet descriptors on a hardware-supported LIFO is kept in SRAM.


Herbert Bos 2004-10-06