On Fri, Dec 20, 2019 at 4:14 AM Minchan Kim <minchan@xxxxxxxxxx> wrote: <snip> > Look https://lkml.org/lkml/2019/10/29/1169 > > z3fold read is 15% faster *only* when when compression ratio is bad below 50% > since zsmalloc involves copy operation if the object is located in the > boundary of discrete pages. It's never popular workload. > Even, once write is involved(write-only, mixed read-write), z3fold is always > slow. Think about that swap-in could cause swap out in the field because devices > are usually under memory pressure. Also, look at the memory usage. > zsmalloc saves bigger memory for all of compression ratios. Yes I remember that. Since your measurements were done on "an x86" without providing any detail on the actual platform used, they are as good as none. ~Vitaly
