Messages in this thread | | | Subject | Re: Alan Shih: "TCP IP Offloading Interface" | From | Alan Cox <> | Date | 14 Jul 2003 21:23:09 +0100 |
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On Llu, 2003-07-14 at 21:03, Jeff Garzik wrote: > If the host CPU is a bottleneck after large-send and checksums have been > offloaded, then logically you aren't getting any work done _anyway_. > You have to interface with the net stack at some point, in which case > you incur a fixed cost, for socket handling, TCP exception handling, etc. > > Maybe somebody needs to be looking into AMP (asymmetric > multiprocessing), too.
There isnt currently any evidence it buy you anything, although HT may change that equation a bit. Its still the same RAM bandwidth and you've not really gotten rid of most of the socket handling/event/wakeup overhead either.
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