Re: [ARM] Native application design and discussion (I hope)

From: Andrii Anisov <andrii_anisov@epam.com>
To: Volodymyr Babchuk <vlad.babchuk@gmail.com>,
	Stefano Stabellini <sstabellini@kernel.org>
Cc: Dario Faggioli <dario.faggioli@citrix.com>,
	Xen Devel <xen-devel@lists.xen.org>,
	Julien Grall <julien.grall@arm.com>,
	george.dunlap@citrix.com, Artem Mygaiev <joculator@gmail.com>
Subject: Re: [ARM] Native application design and discussion (I hope)
Date: Fri, 21 Apr 2017 17:42:08 +0300	[thread overview]
Message-ID: <d79290b9-4621-4da2-139d-50a4362736ea@epam.com> (raw)
In-Reply-To: <CAOcqxo0mZDZE7Jh6MCRJHCnq1q5CC4PNhA0rJz4BoyGENpK_tQ@mail.gmail.com>

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Hello,

On 20.04.17 23:20, Volodymyr Babchuk wrote:
> Hi Stefano,
>
> On 12 April 2017 at 22:17, Stefano Stabellini <sstabellini@kernel.org> wrote:
>> On Wed, 12 Apr 2017, Dario Faggioli wrote:
>>> On Tue, 2017-04-11 at 13:32 -0700, Stefano Stabellini wrote:
>>>> On Fri, 7 Apr 2017, Stefano Stabellini wrote:
>>>>> This is the most difficult problem that we need to solve as part of
>>>>> this
>>>>> work. It is difficult to have the right answer at the beginning,
>>>>> before
>>>>> seeing any code. If the app_container/app_thread approach causes
>>>>> too
>>>>> much duplication of work, the alternative would be to fix/improve
>>>>> stubdoms (minios) until they match what we need. Specifically,
>>>>> these
>>>>> would be the requirements:
>>>>>
>>> IMO, this stubdom way, is really really really interesting! :-)
>>>
>>>>> 1) Determinism: a stubdom servicing a given guest needs to be
>>>>> scheduled
>>>>>     immediately after the guest vcpu traps into Xen. It needs to
>>>>>     deterministic.
We will also need another type of application: one which is periodically 
called by XEN itself, not actually servicing any domain request. This is 
needed for a coprocessor sharing framework scheduler implementation.

-- 

*Andrii Anisov*

*Lead Systems Engineer*

*Office: *+380 44 390 5457 <tel:+380%2044%20390%205457> *x* 66766 
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