Re: [ckrm-tech] [RFC 3/5] sched: Add CPU rate hard caps

[Peter Williams]

Chandra Seetharaman wrote:
> On Thu, 2006-06-01 at 14:04 +0530, Balbir Singh wrote:
> > Hi, Kirill,
> >
> > Kirill Korotaev wrote:
> > > > Do you have any documented requirements for container resource 
> > > > management?
> > > > Is there a minimum list of features and nice to have features for 
> > > > containers
> > > > as far as resource management is concerned?
> > > Sure! You can check OpenVZ project (http://openvz.org) for example of 
> > > required resource management. BTW, I must agree with other people here 
> > > who noticed that per-process resource management is really useless and 
> > > hard to use :(
>
> I totally agree.

"nice" seems to be doing quite nicely :-)

To me this capping functionality is a similar functionality to that 
provided by "nice" and all that's needed to make it useful is a command 
(similar to "nice") that runs tasks with caps applied.  To that end I've 
written a small script (attached) that does this.  As this is something 
that a user might like to combine with "nice" the command has an option 
for setting "nice" as well as caps.

Usage:
        withcap [options] command [arguments ...]
        withcap -h
Options:
        [-c <CPU rate soft cap>]
        [-C <CPU rate hard cap>]
        [-n <nice value>]

        -c Set CPU usage rate soft cap
        -C Set CPU usage rate hard cap
        -n Set nice value
        -h Display this help

Peter
--
Peter Williams                                   pwil3058@xxxxxxxxxxxxxx

"Learning, n. The kind of ignorance distinguishing the studious."
 -- Ambrose Bierce

Attachment: withcap.sh
Description: application/shellscript