> > Hi all,
> >
> > I`m using GCC 9.3 AutoFDO and the old version create_gcov on arm64
> > and it works well. Actually it support not only LBR like mode but
> > also inst_retired even cycles event, which`s the early implementation
> > of AutoFDO[1]. There is no difference in output format of create_gcov
> > between LBR mode and inst_retired. inst_retired is less accurate than
> > LBR but still works.
> >
> > I hope AutoFDO could work better on GCC and am willing to contribute
> > to it, does anybody have suggestions for me?
>
> I think at a minimum we need someone to run the test suite regularly
> and look at all the problem, at least filling PRs, so that regressions
> could be fixed.
>
> But I actually hope one of the automatic testers could at least do
> the testing.
>
Hi Andi,
Thanks for your advice, I'm trying to start these jobs.
-Yancheng
> And perhaps try it on real applications and see how much you can
> improve performance, and if there are problems also file PRs.
>
With my tests, AutoFDO could achieve almost half of the effect of
instrumentation FDO on real applications such as MySQL 8.0.20 .
> There's some other work that could be done (e.g. port some of the
> missing changes from the old google autofdo tree to mainline), but that
> might be more difficult depending on your gcc internals expertise.
>
get it, thanks.
> -Andi
