[Sugar-devel] Fwd: Activity startup idea

[Wade Brainerd]

On Mon, Feb 23, 2009 at 5:57 PM, Luke Faraone <luke at faraone.cc> wrote:

> On Mon, Feb 23, 2009 at 5:46 PM, Carol Farlow Lerche <cafl at msbit.com>wrote:
>
>> Spend a few hours in a kindergarten classroom.  It doesn't work to prevent
>> repeated launching of activities and ultimately a need to reboot.
>>
>
> Is there anything sugar can do in this regard?
>
> Would this activity starting logic work:
> * If no activity instances are running, start it.
> * If an instance has been "started" already but the process has not yet
> signaled on the dbus that it is "running", ie drawing windows etc. for the
> user, switch to that instance
> * If an instance has been started and is running, start a new instance.
> (*or* send a "start new instance" request to the existing instance, which
> allows us to save the overhead of loading up another "python" process)
> * Reap all instances still in the "starting" state for more than X seconds
> that have not explictly requested this functionality to be disabled nor
> signaled via the dbus that they are still active
>

What about watching system resources and refusing to start a new activity
when there isn't enough RAM available to launch it?

It should be pretty straightforward to add a required_memory field to
activity.info - it would be a simple, approximate high water mark memory
usage for a given activity.  The default could be determined by analyzing
the basic activities - maybe 20mb would be good?

Just seems like we should be attacking the problem by attacking the problem.

Cheers,
Wade
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