On Fri, Feb 09, 2007 at 08:08:27AM +0000, Michael Rogers wrote: > Matthew Toseland wrote: > > Simulations maybe? > > You could find simulation parameters (link speed, latency, reordering) > where less than 5% of the retransmissions would be unnecessary, and > other parameters where more than 5% would be unnecessary. Without an > adaptive mechanism it's hard to know which parameters are realistic. > That's why the reordering paper threw me for a loop - I'd assumed we > could just pick a single realistic value, but some links seem to reorder > much more than others. > > > What exactly does TCP do? I thought it combined ack's with data in order > > to minimize overhead. > > Right - data will be piggybacked on an ack if there's any data waiting > (and the same's true for the current simulation code). But if there's no > data waiting the ack will be sent on its own.
I thought TCP acked an entire window at once, not individual packets? > > Cheers, > Michael -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: Digital signature URL: <https://emu.freenetproject.org/pipermail/devl/attachments/20070209/e91c6179/attachment.pgp>
