RFC: Standalone AutoFDO Profile Tool for GCC

[Andi Kleen]

> > There are lots of third party libraries that can read perf.data however,
> > or you can use a perf script extension like the one below.
> 
> We limited the perf parsing to only what we wanted. If there is an easier way to seperate this out and use an exiting library, that would be great.
> I am open for suggestions.

I don't think there is a good reason to switch as long as your
library is well written: especially tolerates new records
unlike the one in autofdo and doesn't use assert as a generic
error handling mechanism.

There are many optional features in newer perf that you likely
don't support (compression, directories etc.) but these are
not essential for now.

-Andi