Subject: Re: [Tsvwg] Re: [tcpm] Re: [e2e] Are you interested in TOEs and related issues(Resend)

From: Jeremy Harris <[email-masked]>
Date: Thu, 01 Apr 2004 16:52:13 +0100

[email-masked] wrote:
> I'll take the liberty of responding to your rhetorical question. I don't think the question can be answered outside the context of protocols like RDMA and iSCSI. A good part of the performance problem for 10 Gig links is the data copies required. Protocols like iSCSI and RDMA can allow the NIC to place the data into applications buffers. This is similar to the function of some Fibre Channel interfaces that allow it higher performance. This is a large part of the benefit gained from implementing a TOE. Protocols like RDMA and iSCSI require TCP (or an alternative transport layer) to be implemented other them which means you need a TOE. 
> 
> If you aren't doing placement on the NIC, it isn't clear that there is enough benefit from implementing a TOE. Because we want to do placement, we need a TOE.

Hand the NIC recieve buffers off to the application, and you don't need
to do placement.

Both placement and TOE look like solutions looking for a nonexistent
problem to me.

- Jeremy

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