在 2020/11/5 15:51, Ard Biesheuvel 写道: > Note that NEON intrinsics can be compiled for 32-bit ARM as well (with > a bit of care - please refer to lib/raid6/recov_neon_inner.c for an > example of how to deal with intrinsics that are only available on > arm64) and are less error prone, so intrinsics should be preferred if > feasible. > > However, you have still not explained how optimizing Adler32 makes a > difference for a real-world use case. Where is libdeflate used on a > hot path? > . Sorry :(, I have not specifically searched for the use of this algorithm in the kernel. When I used perf to test the performance of the libz library before, I saw that the adler32 algorithm occupies a lot of hot spots.I just saw this algorithm used in the kernel code, so I think optimizing this algorithm may have some positive optimization effects on the kernel.:) -- Best regards, Li Qiang
