From: Dietmar Eggemann <dietmar.eggemann@arm.com>
To: Peter Zijlstra <peterz@infradead.org>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
Arjan van de Ven <arjan@linux.intel.com>,
Paul Turner <pjt@google.com>, Len Brown <len.brown@intel.com>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Andi Kleen <andi.kleen@intel.com>,
Rafael Wysocki <rafael.j.wysocki@intel.com>
Subject: Re: [RFC PATCH 0/3] CFS idle injection
Date: Fri, 6 Nov 2015 18:30:01 +0000 [thread overview]
Message-ID: <563CF1A9.8030700@arm.com> (raw)
In-Reply-To: <20151105101218.GB3604@twins.programming.kicks-ass.net>
On 05/11/15 10:12, Peter Zijlstra wrote:
>
> People, trim your emails!
>
> On Wed, Nov 04, 2015 at 08:58:30AM -0800, Jacob Pan wrote:
>
>>> I also like #2 too. Specially now that it is not limited to a specific
>>> platform. One question though, could you still keep the cooling device
>>> support of it? In some systems, it might make sense to enable /
>>> disable idle injections based on temperature.
>
>> One of the key difference between 1 and 2 is that #2 is open loop
>> control, since we don't have CPU c-states info baked into scheduler.
>
> _yet_, there's people working on that. The whole power aware scheduling
> stuff needs that.
Isn't the idle state information (rq->idle_state) already used in
find_idlest_cpu()?
What we use in energy aware scheduling is quite similar but since we're
interested in the index information of the c-state (to access the right
element of the idle_state vectors of the energy model, we added
rq->idle_state_idx.
[...]
next prev parent reply other threads:[~2015-11-06 18:30 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-03 0:10 [RFC PATCH 0/3] CFS idle injection Jacob Pan
2015-11-03 0:10 ` [RFC PATCH 1/3] ktime: add a roundup function Jacob Pan
2015-11-03 0:10 ` [RFC PATCH 2/3] timer: relax tick stop in idle entry Jacob Pan
2015-11-03 0:10 ` [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan
2015-11-03 13:31 ` Peter Zijlstra
2015-11-03 14:16 ` Jacob Pan
2015-11-03 16:45 ` Jacob Pan
2015-11-05 10:09 ` Peter Zijlstra
2015-11-05 14:22 ` Arjan van de Ven
2015-11-05 14:33 ` Peter Zijlstra
2015-11-05 14:48 ` Peter Zijlstra
2015-11-05 15:28 ` Arjan van de Ven
2015-11-05 16:52 ` Peter Zijlstra
2015-11-05 18:55 ` Thomas Gleixner
2015-11-05 18:47 ` Thomas Gleixner
2015-11-05 15:32 ` Jacob Pan
2015-11-05 16:06 ` Arjan van de Ven
2015-11-05 19:27 ` Jacob Pan
2015-11-05 19:32 ` Jacob Pan
2015-11-05 13:59 ` Peter Zijlstra
2015-11-05 23:36 ` Jacob Pan
2015-11-06 7:45 ` Peter Zijlstra
2015-11-06 23:49 ` Jacob Pan
2015-11-10 0:19 ` Jacob Pan
2015-11-04 6:06 ` [RFC PATCH 0/3] CFS " Eduardo Valentin
2015-11-04 16:58 ` Jacob Pan
2015-11-04 17:05 ` Srinivas Pandruvada
2015-11-04 18:43 ` Eduardo Valentin
2015-11-05 10:12 ` Peter Zijlstra
2015-11-06 16:50 ` Punit Agrawal
2015-11-06 19:18 ` Jacob Pan
2015-11-09 11:56 ` Punit Agrawal
2015-11-09 14:15 ` Peter Zijlstra
2015-11-09 14:43 ` Jacob Pan
2015-11-10 10:07 ` Juri Lelli
2015-11-10 10:34 ` Peter Zijlstra
2015-11-10 10:56 ` Juri Lelli
2015-11-09 14:36 ` Jacob Pan
2015-11-06 18:30 ` Dietmar Eggemann [this message]
2015-11-06 19:10 ` Jacob Pan
2015-11-06 21:55 ` Dietmar Eggemann
2015-11-09 21:23 ` Jacob Pan
2015-11-09 21:45 ` Peter Zijlstra
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