Re: Efficient x86 and x86_64 NOP microbenchmarks

[Steven Rostedt]

Andi Kleen wrote:
> On Wed, Aug 13, 2008 at 04:00:37PM -0400, Steven Rostedt wrote:
>   
> > > Now the numbers have shown that just by not using frame pointer (
> > > -pg right now implies frame pointer) you can get more benefit 
> > > than what you lose from using non optimal nops.
> > >  
> > >       
> > No, I can easily make a patch that does not use frame pointers but still 
> >     
>
> Not without patching gcc. Try it. The patch is not very difficult and i did
> it here, but it needs a patch. 
>   

OK, I admit you are right ;-)

I got the error message:

   gcc: -pg and -fomit-frame-pointer are incompatible

-- Steve

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