> > 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
