Quoting r. Bryan O'Sullivan <[EMAIL PROTECTED]>: > Subject: Re: [openib-general] Re: Problem configuring ipath_ether > > On Sat, 2006-03-25 at 22:36 +0200, Michael S. Tsirkin wrote: > > > Since IP over IB > > just puts an IP packet inside a UD packet without overhead, what wire > > protocol > > changes can thinkably be done, while still using InfiniBand protocols, to > > improve performance? > > The ipath_ether device provides an MTU of ~8K, by sending packets back > to back. Even though a real 8K MTU isn't possible, this technique gives > considerably better throughput than IPoIB, at least on hardware that can > sustain a high messaging rate.
Thanks, sounds interesting. Some questions: Grepping for MTU I even see 16384 and 32K - this is done with the same technique, isn't it? Any ideas on why isn't something like this done in the standard IPoIB then? Anyone on the list knows whether/when this is a good idea? I expect it would be relatively easy to hack something like this into existing IPoIB codebase - I expect no one tried this yet? -- Michael S. Tsirkin Staff Engineer, Mellanox Technologies _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
