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Re: [PATCH] AutoFDO patch for trunk


On 2014.10.20 at 14:21 -0700, Dehao Chen wrote:
> >> +If @var{path} is specified, GCC looks at the @var{path} to find
> >> +the profile feedback data files.
> >> +
> >> +In order to collect AutoFDO profile, you need to have:
> >> +
> >> +1. A linux system with linux perf support
> >> +2. An Intel processor with last branch record (LBR) support
> >
> > Is it really a requirement or will it only make profiles more accurate?
> 
> It's optional, updated the doc.

Can you give an example on how this is supposed to work on non Intel
CPUs? It is not obvious to me.

-- 
Markus


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