lkml.org 
[lkml]   [2011]   [Aug]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/5] writeback: dirty position control
On Fri, Aug 26, 2011 at 08:11:50PM +0800, Peter Zijlstra wrote:
> On Fri, 2011-08-26 at 19:26 +0800, Wu Fengguang wrote:
> > Now I get 3 figures. Test case is: run 1 dd write task for 300s, with
> > a "disturber" dd read task during roughly 120-130s.
>
> Ah, but ideally the disturber task should run in bursts of 100ms
> (<feedback period), otherwise your N is indeed mostly constant.

Ah yeah, the disturber task should be a dd writer! Then we get

- 120s: N=1 => N=2
- 130s: N=2 => N=1

I'll try it right away.

Thanks,
Fengguang


\
 
 \ /
  Last update: 2011-08-26 14:23    [W:0.148 / U:0.128 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site