On Wed, 25 Feb 2026 at 18:40, Gao Xiang <[email protected]> wrote: > > > > On 2026/2/26 10:32, Yifan Zhao wrote: > > > > A quick search shows that x86 kernel implementation also use `div` > > instruction > > > > under Linux v6.19 and GCC 15.2.1, add GCC correctly generate shift > > instruction > > Could we try more GCC versions and find the impacts? > > Does it a recent GCC regression? > > > > > > in my arm64 machine with GCC 14.2.0. > > > > Could you also consider evaluate this optimization in kernel? > > Yes, but I wonder if `div` is already used for these years on x86, > could you check this?
Hello all, I'll attempt to perform benchmarks on as many architectures and compiler variants as I can. I was looking into lkp-tests to perform this however I was facing trouble running on my OS. Is there a simple way to do this? Thank you, Ashley
