On 11/18/20 8:52 AM, Pavel Begunkov wrote: > On 18/11/2020 15:36, Xiaoguang Wang wrote: >>> On 11/18/20 6:59 AM, Pavel Begunkov wrote: >>> Ran it through the polled testing which is core limited, and I didn't >>> see any changes... >> Jens and Pavel, sorry for the noise... > > Not at all, that's great you're trying all means to improve > performance, some are just don't worth the effort. Exactly, never stop trying, it's just that not all efforts pan out. That's pretty typical for software development :-) >> I also have some tests today, in upstream kernel, I also don't see >> any changes, but in our internal 4.19 kernel, I got a steady about 1% >> iops improvement, and > > hmm, 1% is actually a good result It is, I wonder why there's such a big discrepancy between the 4.19 base and current -git in terms of the win on that. Might be changes outside of io_uring. -- Jens Axboe
