hot swapping overhead

[Brecht Vermeulen]

Hi,

well, I've tried some similar things a long time ago, but then got
crashes after a number of hot swaps because of a problem of thread
creation.

http://www.pdos.lcs.mit.edu/click/ml/click/msg00307.html

I haven't repeated these tests since then however.

best regards,
Brecht

Eddie Kohler wrote:
> 
> Hi Yu,
> 
> > One of my
> > question is that what's the processing overhead(in detail ns,us,ms,etc)
> > of the hot swapping with the different Config files,say, how long will
> > it take to break old pipes and build new pipes when we change Config
> > file on fly? Because I was not able to find such results among your
> > published papers. I'll appreciate it very much for your kindly help.
> 
> I'm not sure what you mean about 'breaking old pipes and building new
> pipes', and hotswapping speed depends on the configuration in question, but
> you should be able to achieve a hundred hotswaps per second or more. This
> number will drop a lot if the configurations require loading new modules
> (if they've gone through click-fastclassifier or click-devirtualize, for
> example). If you need more specific numbers, we could investigate this more
> carefully.
> 
> Anyone else on the list have different experience?
> 
> Eddie