Hi Chandra ,
Thanks.
but i have a small query which remains
unanswered.
I went through resource management on
other operating systems.SRM
(Solaris resource Manager) , PRM(Process
Resource Manager on HP) have entity called as
projectid (same as application tag on linux)
which is being used by many application
This feature may be very important users
perspective.
Are you planning to enable application tag
on linux in near future ?
Please let me know.
thanks,
--kiran
--- Chandra Seetharaman <[EMAIL PROTECTED]> wrote:
> On Mon, Feb 21, 2005 at 08:37:14PM -0800, mehta
> kiran wrote:
> > 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).
> yes.
>
> > 2.But is there any way to specify a rule , so
> > that all the descendents of a process belong
> > to same class.
>
> Inheriting tags would provide this functionality.
> Currently, it is
> disabled.. I don't exactly remember why we disabled
> it. will try to
> remember.
>
> > 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?
>
> Tag gets associated with a process only when you
> write the "pid tag" to the
> rbce_tag file. currently it is not inherited, so
> there is no tag for a
> process at fork.
> Also, tags come into picture only if you have RBCE.
>
> >
> > 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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