Re: It's time to kill statistical profiling

Ed Maste <[email protected]>
Newsgroups gmane.os.freebsd.architechture
Message-ID <CAPyFy2B=ybCgy_gq=EF==1K=AKE2eTzoUnx7VFLRPFXTdYERwQ@mail.gmail.com> 
On Fri, 18 Jun 2021 at 03:36, Poul-Henning Kamp <[email protected]> wrote:
>
> Instead of documenting stathz, I suggest we retire statistical
> profiling and convert the profiled libraries to code-coverage
> profiling (-fprofile-arcs and -ftest-coverage)

I brought up retiring the PROFILE option to build _p libraries last year:
https://lists.freebsd.org/pipermail/freebsd-current/2020-January/075105.html
There were a couple of objections in that thread, but if it doesn't
produce accurate data there's little value in keeping it.

> Instead of documenting stathz, I suggest we retire statistical
> profiling and convert the profiled libraries to code-coverage
> profiling (-fprofile-arcs and -ftest-coverage)

Having built-in support for code coverage would be great, but IMO not
done by just swapping the current libraries / build infrastructure /
options over.
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