Messages in this thread | | | Subject | Re: More performance for the TCP stack by using additional hardware chip on NIC | From | Avi Kivity <> | Date | Sun, 17 Apr 2005 13:29:14 +0300 |
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On Sun, 2005-04-17 at 12:07, Arjan van de Ven wrote: > On Sun, 2005-04-17 at 10:17 +0200, Andreas Hartmann wrote: > > Hello! > > > > Alacritech developed a new chip for NIC's > > (http://www.alacritech.com/html/tech_review.html), which makes it possible > > to take away the TCP stack from the host CPU. Therefore, the host CPU has > > more performance for the applications according Alacritech. > > there are very many good reasons why this for linux is not the right > solution, including the fact that the linux tcp/ip stack already is > quite fast so the "gains" achieved aren't that stellar as the gains you > get when comparing to windows. >
TOEs can remove the data copy on receive. In some applications (notably storage), where the application does not touch most of the data, this is a significant advantage that cannot be achieved in a software-only solution.
> Also these types of solution always add quite a bit of overhead to > connection setup/teardown making it actually a *loss* for the "many > short connections" types of workloads. Now guess which things certain > benchmarks use, and guess what real world servers do :) >
again, this depends on the application.
a copyless solution is probably necessary to achieve 10Gb/s speeds.
Avi
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