[lkml]   [2019]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCHv2 0/3] Allow ZRAM to use any zpool-compatible backend
On Fri, Dec 20, 2019 at 4:14 AM Minchan Kim <> wrote:

> Look
> 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.


 \ /
  Last update: 2019-12-20 07:04    [W:0.045 / U:0.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site