lkml.org 
[lkml]   [2017]   [Apr]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC 0/1] add support for reclaiming priorities per mem cgroup
On Thu, Mar 30, 2017 at 09:48:55AM -0700, Shakeel Butt wrote:
> > A more useful metric for memory pressure at this point is quantifying
> > that time you spend thrashing: time the job spends in direct reclaim
> > and on the flipside time the job waits for recently evicted pages to
> > come back. Combined, that gives you a good measure of overhead from
> > memory pressure; putting that in relation to a useful baseline of
> > meaningful work done gives you a portable scale of how effictively
> > your job is running.
> >
> > I'm working on that right now, hopefully I'll have something useful
> > soon.
>
> Johannes, is the work you are doing only about file pages or will it
> equally apply to anon pages as well?

It will work on both, with the caveat that *any* swapin is counted as
memory delay, whereas only cache misses of recently evicted entries
count toward it (we don't have timestamped shadow entries for anon).

\
 
 \ /
  Last update: 2017-04-13 18:04    [W:0.199 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site