On Tue, 12 Jan 2021, Zhongwei Cai wrote: > > I'm working with Mingkai on optimizations for Ext4-dax. What specific patch are you working on? Please, post it somewhere. > We think that optmizing the read-iter method cannot achieve the > same performance as the read method for Ext4-dax. > We tried Mikulas's benchmark on Ext4-dax. The overall time and perf > results are listed below: > > Overall time of 2^26 4KB read. > > Method Time > read 26.782s > read-iter 36.477s What happens if you use this trick ( https://lkml.org/lkml/2021/1/11/1612 ) - detect in the "read_iter" method that there is just one segment and treat it like a "read" method. I think that it should improve performance for your case. Mikulas
