From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Gaurav Poothia <gaurav.poothia@gmail.com>,
linux-kernel@vger.kernel.org, peterz@infradead.org,
mingo@redhat.com
Subject: Re: Question about group scheduler cpu shares
Date: Fri, 22 Jul 2016 04:51:28 +0200 [thread overview]
Message-ID: <1469155888.3862.26.camel@gmail.com> (raw)
In-Reply-To: <CADDfC=obwnnkVG9C8OxZ+4zHz6Oe_1_c8nOPCAjbihJUNs2jmQ@mail.gmail.com>
On Thu, 2016-07-21 at 18:18 -0700, Gaurav Poothia wrote:
> > ROOT
> > >
> > + -Group1(3072)
> > > |
> > > +- A(2048)
> > > |
> > > +- B(1024)
> > >
> > +- Group2(2048)
> > |
> > +-C(1024)
> > |
> > +-D(1024)
> >
> > Say I add a task E to Group1's task list (note that is an interior aka
> > non-leaf node)
> > How does the CPU split change between A, B and E.
> > AFAICT there is no cgroup cpu subsystem knob to weight tasks on an
> > interior node against the tasks in that node's children
A, B and E are all entities with a weight, so just plug E into your
graph. Its weight is determined by nice level, which is what cgroups
should have done instead of inventing shares IMHO. 1024 == nice(0).
-Mike
next prev parent reply other threads:[~2016-07-22 2:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-21 19:03 Question about group scheduler cpu shares Gaurav Poothia
2016-07-22 1:18 ` Gaurav Poothia
2016-07-22 2:51 ` Mike Galbraith [this message]
2016-07-22 3:24 ` Gaurav Poothia
2016-07-22 4:19 ` Mike Galbraith
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