Re: Plumbers: Tweaking scheduler policy micro-conf RFP

From: Juri Lelli <juri.lelli@gmail.com>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	paulmck@linux.vnet.ibm.com, smuckle@quicinc.com, khilman@ti.com,
	Robin.Randhawa@arm.com, suresh.b.siddha@intel.com,
	thebigcorporation@gmail.com, venki@google.com,
	peterz@infradead.org, panto@antoniou-consulting.com,
	mingo@elte.hu, paul.brett@intel.com, pdeschrijver@nvidia.com,
	pjt@google.com, efault@gmx.de, fweisbec@gmail.com,
	geoff@infradead.org, tglx@linutronix.de,
	amit.kucheria@linaro.org, linux-kernel@vger.kernel.org,
	linaro-sched-sig@lists.linaro.org
Subject: Re: Plumbers: Tweaking scheduler policy micro-conf RFP
Date: Tue, 15 May 2012 10:41:43 +0200	[thread overview]
Message-ID: <4FB216C7.6020604@gmail.com> (raw)
In-Reply-To: <CAKfTPtA8EJeYVfpYTF7sh44ANOCUzE_eLkmYgE+bg25Vsgoj1Q@mail.gmail.com>

On 05/11/2012 06:38 PM, Vincent Guittot wrote:
> On 11 May 2012 18:26, Steven Rostedt<rostedt@goodmis.org>  wrote:
>> Not really specific to HW, but Juri Lelli has been working on a deadline
>> scheduler. Perhaps his work may be of interest.
>
> Yes for sure, if Juri is agree to present his work
>

Sure! It will be really interesting for me.
I'm setting up the proposal. I'll send it today.

Thanks and Regards,

- Juri

> Vincent
>>
>> -- Steve
>>
>>
>> On Fri, 2012-05-11 at 18:16 +0200, Vincent Guittot wrote:
>>> This is a request-for-participation in a micro conference during the
>>> next Linux Plumber Conference (29-31st Aug).
>>> It'll require critical mass measured in talk submissions in the
>>> general area of scheduler and task management.
>>>
>>> If you're working on improving the the scheduler policy used to place
>>> a task on a CPU to suit your HW, we are inviting your participation
>>> and request you to submit a proposal to present your problem (e.g.
>>> power-efficiency) or a solution to solve said problem that should be
>>> considered by upstream developers.
>>>
>>> We've interacted with the people in To: list before in our quest to
>>> better understand how the scheduler works and we're hoping you all
>>> will consider participating in the micro-conf to help guide what kinds
>>> of ideas are likely to make it upstream.
>>>
>>> If you have ongoing work or ideas in the the following areas we're
>>> especially interested in hearing from you:
>>>   1. Consolidation of statistics with other frameworks (cpuidle,
>>> cpufreq, scheduler all seem to track their own statistics related to
>>> load, idleness, etc. Can this be converted to a library that is
>>> useable by all?)
>>>   2. Replacement for task consolidation on fewer CPUs aka. replacement
>>> for sched_mc
>>>   3. Improvement in the placement of activity beside tasks: timer,
>>> workqueue, IO, interruption
>>>   4. Instrumentation to calculate the compute capacity available on
>>> active cores and its utilization by a given workload
>>>
>>> We are thinking of organising the micro-conf as a Q&  A session where
>>> a participant would state a problem and then there would be
>>> brainstorming on if this is indeed a problem and is so, how to achieve
>>> a solution. In other words, 20-30 minute slots of each Q&  A
>>>
>>> 1. Problem statements with specific examples on why changing the
>>> default scheduler policy is desired
>>> 2. For each problem, if it is deemed not possible to accomplish easily
>>> today, brainstorming on what an acceptable solution would look like
>>> (frameworks to build upon, interfaces to use, related work in the
>>> area, key people to involve, etc.)
>>>
>>> Please email us if you will be attending the conference and interested
>>> in talking about this problem space.
>>>
>>> Regards,
>>> Amit&  Vincent
>>
>>