On Wed, May 25, 2005 at 04:02:58PM -0700, Jon Dama wrote: > It's different, yes. But the trouble is that you need a controlled > interrupt source--i.e., you have to have some concept of when an "event" > might have been handled (were it not for such and such activity). > > I posit that without that counterfactual talking about PREEMPTION is > meaningless. > > The technique I mentioned--measuring and comparing the jitter was intended > to quash measuring the performance of the network stack itself. > > Do you have an idea how you can pose that counterfactual in a synthetic > arrangement more closely connected with the problem at hand?
Nope..that's why I said it was a hard thing to study. Well-controlled benchmarking of FreeBSD is always welcome, so please feel free to proceed with your tests and let us know of anything interesting you identify. Kris
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