On Wed, Mar 24, 2021 at 11:32 PM Xionghu Luo <luo...@linux.ibm.com> wrote:
>
> On 2021/3/24 23:56, David Edelsohn wrote:
> > On Wed, Mar 24, 2021 at 1:44 AM Xionghu Luo<luo...@linux.ibm.com>  wrote:
> >> l2 cache size for Power8 is 512kB, correct the copy paste error from 
> >> Power7.
> >> Tested no performance change for SPEC2017.
> >>
> >> gcc/ChangeLog:
> >>
> >> 2021-03-24  Xionghu Luo<luo...@linux.ibm.com>
> >>
> >>          * config/rs6000/rs6000.c (struct processor_costs): Change to
> >>          512.
> > This ChangeLog entry should state*what*  you are changing to 512.
> >
> > BTW, the Power8 support was added before everything was public, so it
> > used Power7 as the information that safely could be shared.  The
> > explanation in the ChangeLog probably should not characterize it as a
> > "copy paste error".  The value wasn't updated after the initial Power8
> > support was added.
> >
> > Okay with that change.
> >
>
> Thanks for the information, committed to r11-7821-g08103e4d with the changes.
> And backporting it to gcc-10 and eventually gcc-9?

Backport is okay.

Thanks, David

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