From: Peter Zijlstra <peterz@infradead.org>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Nikhil Rao <ncrao@google.com>, Ingo Molnar <mingo@elte.hu>,
Mike Galbraith <efault@gmx.de>,
Venkatesh Pallipadi <venki@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/4] sched: drop group_capacity to 1 only if local group has extra capacity
Date: Fri, 15 Oct 2010 19:24:50 +0200 [thread overview]
Message-ID: <1287163490.1998.106.camel@laptop> (raw)
In-Reply-To: <1287162786.2622.16.camel@sbsiddha-MOBL3>
On Fri, 2010-10-15 at 10:13 -0700, Suresh Siddha wrote:
> On Fri, 2010-10-15 at 10:05 -0700, Peter Zijlstra wrote:
> > For regular balancing local_group will be the first, since we only
> > ascend the domain tree on the local groups. But its not true for no_hz
> > balancing afaikt.
>
> Even for NOHZ, we always ascend each cpu's sched domain and the local
> group is the first one always. But yes, we are depending on the local
> group being the first group.
Ah, yes, we take the balance_cpu's domain tree, not the local cpu's
domain tee.
Hrm,.. ok feels slightly tricky though.
next prev parent reply other threads:[~2010-10-15 17:25 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-13 19:09 [PATCH 0/4][RFC v2] Improve load balancing when tasks have large weight differential Nikhil Rao
2010-10-13 19:09 ` [PATCH 1/4] sched: do not consider SCHED_IDLE tasks to be cache hot Nikhil Rao
2010-10-13 19:09 ` [PATCH 2/4] sched: set group_imb only a task can be pulled from the busiest cpu Nikhil Rao
2010-10-18 19:23 ` [tip:sched/core] sched: Set " tip-bot for Nikhil Rao
2010-10-13 19:09 ` [PATCH 3/4] sched: drop group_capacity to 1 only if local group has extra capacity Nikhil Rao
2010-10-14 5:48 ` Nikhil Rao
2010-10-14 23:42 ` Suresh Siddha
2010-10-15 11:50 ` Peter Zijlstra
2010-10-15 16:13 ` Nikhil Rao
2010-10-15 17:05 ` Peter Zijlstra
2010-10-15 17:13 ` Suresh Siddha
2010-10-15 17:24 ` Peter Zijlstra [this message]
2010-10-15 17:27 ` Nikhil Rao
2010-10-13 19:09 ` [PATCH 4/4] sched: force balancing on newidle balance if local group has capacity Nikhil Rao
2010-10-15 12:06 ` Peter Zijlstra
2010-10-15 12:18 ` Mike Galbraith
2010-10-15 12:20 ` Peter Zijlstra
2010-10-15 12:35 ` Mike Galbraith
2010-10-15 16:19 ` Nikhil Rao
2010-10-15 12:08 ` Peter Zijlstra
2010-10-15 16:20 ` Nikhil Rao
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