Re: inline keyword and profiling

On Fri, 2005-04-02 at 19:27 -0500, Chris Pickett wrote:
> Chris Pickett wrote:
> > Hi,
> > 
> > I was wondering: it seems the inline keyword might have an effect on 
> > profiling.  Should we replace all inline's with svm_inline, just like we 
> > now have svm_static?
> 
> Actually man gcc says:
> 
> -fno-inline
>      Don't pay attention to the "inline" keyword.  Normally this option
>      is used to keep the compiler from expanding any functions inline.
>      Note that if you are not optimizing, no functions can be expanded
>      inline.
> 
> which I guess means there is no inlining with 
> --enable-debugging-features (implies -O0).

It depens on the kind of profiling you might want to do.  If you're
profiling for time (and not ie. no. of events per program run) then
profiling -O0 version is not very useful.

Having certain portions of the code inlined also makes difference in
performance, not to mention that the "inline-threaded engine" will not
work at all if you turn off inlining.

As for the original question - if there is a rationale why svm_inline
should be introduced, then be it.  But it should be a good and verified
rationale (ie. proven to be useful while used in a sandobx).

Cheers,

				GBP
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Grzegorz B. Prokopski           <[email protected]>
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