lkml.org 
[lkml]   [2006]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory)
From
Date
On Wed, 2006-09-13 at 18:22 -0700, Rohit Seth wrote:
<snip>
> >
> > Here are results of some of the benchmarks we have run in the past
> > (April 2005) with CKRM which showed no/negligible performance impact in
> > that scenario.
> > http://marc.theaimsgroup.com/?l=ckrm-tech&m=111325064322305&w=2
> > http://marc.theaimsgroup.com/?l=ckrm-tech&m=111385973226267&w=2
> > http://marc.theaimsgroup.com/?l=ckrm-tech&m=111291409731929&w=2
> > >
>
>
> These are good results. But I still think the cost will increase over a
> period of time as more logic gets added. Any data on microbenchmarks

IMO, overhead may not increase for a _non-user_ of the feature.

> like lmbench.

I think we have run those, but I could not find the results in the
mailing list.
>
> > <snip>
> >
> > > > Not at all. If the container they are interested in is guaranteed, I do
> > > > not see how apps running outside a container would affect them.
> > > >
> > >
> > > Because the kernel (outside the container subsystem) doesn't know of
> >
> > The core resource subsystem (VM subsystem for memory) would know about
> > the guarantees and don't cares, and it would handle it appropriately.
> >
>
> ...meaning hooks in the generic kernel reclaim algorithm. Getting
> something like that in mainline will be at best tricky.

Yes, it does mean doing something in the reclamation path.

>
>
> -rohit
>
--

----------------------------------------------------------------------
Chandra Seetharaman | Be careful what you choose....
- sekharan@us.ibm.com | .......you may get it.
----------------------------------------------------------------------


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-09-15 01:15    [W:0.109 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site