Hi Chandra ,
Your reply was definitely helpful.
1.From your reply what i concluded is that
*if* after fork child belongs to the same class
as parent(in accordance with CE rules) , then
both parent and child will respect attribute
values(ex: amount of cpu or mem pages).
2.But is there any way to specify a rule , so
that all the descendents of a process belong
to same class.
3.From other mails on this mailing list , I
inferred that tag(application tag) cannot be
used for this purpose.
4.I can not find any info on "tag".
If i start a new process what will be its
tag.Is it inherited by child?
Example:
I have bash running. If i do
# su - abc
then new process created goes in
a different class.
I could not find any rule which can hold both
parent and child in same class if child pid,
child gid change.(child is diffrent command then
parent nad hence cmd and args will not always
prove useful)
5. If whatever i told above is not wrong,
any plans to provide such a facility?
thanks & regards,
--kiran
--- Chandra Seetharaman <[EMAIL PROTECTED]> wrote:
> On Mon, Feb 21, 2005 at 02:12:10AM -0800, mehta
> kiran wrote:
> > Hi ,
> > If CKRM is being used , is it always
> guaranteed
> > that child inherits parents attribute values.
>
> In the absence of CE, at fork(), parent's class _is_
> inherited
> by the child.
>
> If you have a CE, then the CE determines where the
> new task ends, CE
> could decide the classification at fork(), exec() or
> any other kernel
> classification points. For example, in RBCE if you
> have a rule
> "cmd=sleep,class=/rcfs/taskclass/sleep_class", and
> bash belongs to
> /rcfs/taskclass, then when sleep is invoked from
> bask, at fork(), the new
> task will belong to /rcfs/taskclass, and after exec
> it will be moved to
> /rcfs/taskclass/sleep_class.
>
>
> > Ex: parent uses 10% of cpu then will child
> > also use 10% of avaible cpu
>
> They both will belong to the same class, and the
> class will be entitled to
> 10% of available cpu.
> >
> > thanks,
> > --kiran
> >
> >
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>
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> - [EMAIL PROTECTED] |
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