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Re: [GOOGLE] Writes annotation info in elf section.
- From: Xinliang David Li <davidxl at google dot com>
- To: Dehao Chen <dehao at google dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Wed, 12 Mar 2014 15:55:09 -0700
- Subject: Re: [GOOGLE] Writes annotation info in elf section.
- Authentication-results: sourceware.org; auth=none
- References: <CAO2gOZUgGC9=Ris-gymwt2_Tt6S6G1Gh5zGEDgAOsrXvgDVUBA at mail dot gmail dot com>
Why is it not enough to emit warnings during build time when source
code changes signifcantly?
David
On Tue, Mar 11, 2014 at 4:27 PM, Dehao Chen <dehao@google.com> wrote:
> During AutoFDO annotation, we want to record the annotation stats into
> an elf section, so that we can calculate how much percentage of the
> profile is annotated, which can be used as an indicator whether code
> has changed significantly comparing with the profiled source.
>
> Bootstrapped and performance test on-going.
>
> OK for google-4_8?
>
> Thanks,
> Dehao