lkml.org 
[lkml]   [2010]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -mmotm 0/5] memcg: per cgroup dirty limit (v6)
On Fri, 12 Mar 2010 00:27:09 +0100
Andrea Righi <arighi@develer.com> wrote:

> On Thu, Mar 11, 2010 at 10:03:07AM -0500, Vivek Goyal wrote:

> > I am still setting up the system to test whether we see any speedup in
> > writeout of large files with-in a memory cgroup with small memory limits.
> > I am assuming that we are expecting a speedup because we will start
> > writeouts early and background writeouts probably are faster than direct
> > reclaim?
>
> mmh... speedup? I think with a large file write + reduced dirty limits
> you'll get a more uniform write-out (more frequent small writes),
> respect to few and less frequent large writes. The system will be more
> reactive, but I don't think you'll be able to see a speedup in the large
> write itself.
>
Ah, sorry. I misunderstood something. But it's depends on dirty_ratio param.
If
background_dirty_ratio = 5
dirty_ratio = 100
under 100M cgroup, I think background write-out will be a help.
(nonsense ? ;)

And I wonder make -j can get better number....Hmm.

Thanks,
-Kame



\
 
 \ /
  Last update: 2010-03-12 00:59    [W:0.128 / U:9.636 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site