On 2026/2/27 07:37, Ashley Lee wrote:
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?
I never customize lkp-tests, but I guess just triggering fio on
common platfroms with a given dataset (like enwik9) is enough.
Thanks,
Gao Xiang
Thank you,
Ashley
