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Old 10-15-2012, 07:02 AM
Didier Roche
 
Default Trying to reduce our memory and battery footprint

Hey guys,

In the past cycles, we saw our memory need for an user session
increasing quite a lot. One of the consequence is that our battery life
on laptop diminished.
I think having a session discussing and trying to review if we can work
on the more offending daemons, disabling some plugins and so on, can
help to put her in a better position on that front.


As with install disk cleaning, some regular checkups like this one can
be interesting to process regularly, we can also discuss about how to
put some automated tests in place to ensure we tackle any regression
then on power consumption or used RAM.


Cheers,
Didier

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Old 10-15-2012, 07:10 PM
Ted Gould
 
Default Trying to reduce our memory and battery footprint

On Mon, 2012-10-15 at 09:02 +0200, Didier Roche wrote:
> In the past cycles, we saw our memory need for an user session
> increasing quite a lot. One of the consequence is that our battery life
> on laptop diminished.
> I think having a session discussing and trying to review if we can work
> on the more offending daemons, disabling some plugins and so on, can
> help to put her in a better position on that front.

At UDS Q we discussed getting upstart into the desktop, which I think is
critical for a lot of these. Most of them are basically file watches
and other events that upstart could do for us. I don't believe that
happened in the Q cycle, do we think that we could get upstart
underneath things with some new events in R? I'd love to see that.
Curious how we should plan sessions based on that, it seems that the
upstart sessions and these would be co-dependent.

--Ted

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Old 10-15-2012, 07:19 PM
Sebastien Bacher
 
Default Trying to reduce our memory and battery footprint

Le 15/10/2012 21:10, Ted Gould a écrit :

I don't believe that
happened in the Q cycle, do we think that we could get upstart

Hey,

James pinged me recently because foundation is planning work for next
cycle and wanted to know what's the most important on the list for
desktop. I said it would be "user session jobs", do other still agree
with that? If you have other request I think there is still time at UDS
to discuss those


Cheers,
Sebastien Bacher

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Old 10-15-2012, 11:36 PM
Robert Ancell
 
Default Trying to reduce our memory and battery footprint

On 16/10/12 09:23, Ted Gould wrote:
> On Mon, 2012-10-15 at 21:19 +0200, Sebastien Bacher wrote:
>> Le 15/10/2012 21:10, Ted Gould a écrit :
>>> I don't believe that
>>> happened in the Q cycle, do we think that we could get upstart
>> James pinged me recently because foundation is planning work for next
>> cycle and wanted to know what's the most important on the list for
>> desktop. I said it would be "user session jobs", do other still agree
>> with that? If you have other request I think there is still time at UDS
>> to discuss those
> I still don't understand why we want a single upstart instance and not
> one system one and one per session. I think that having a single
> instance is what makes user jobs difficult as you have to handle all the
> states of things like encrypted file systems, where if we started the
> upstart process later, PAM/lightdm would do it for us. There are other
> benefits too, but at least if I can move that out of the way I can get
> other features :-)
>
I agree there, I don't think it's reliably possible to have a root
daemon launch things for a user. Since PAM is so flexible it could have
set anything in the root session process that is required for
application to run.

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Old 10-15-2012, 11:40 PM
Robert Ancell
 
Default Trying to reduce our memory and battery footprint

On 16/10/12 08:19, Sebastien Bacher wrote:
> Le 15/10/2012 21:10, Ted Gould a écrit :
>> I don't believe that
>> happened in the Q cycle, do we think that we could get upstart
> Hey,
>
> James pinged me recently because foundation is planning work for next
> cycle and wanted to know what's the most important on the list for
> desktop. I said it would be "user session jobs", do other still agree
> with that? If you have other request I think there is still time at
> UDS to discuss those
>
> Cheers,
> Sebastien Bacher
>
That sounds right to me. The other things I think we need at some point:
- Session process tracking so we can ensure that a session is completely
destroyed on exit
- Multi-seat support


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