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

withcap [options] command [arguments ...]
withcap -h
[-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 Williams

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