[Sugar-devel] Vision

[James Cameron]

No, not at all.  There are plenty of ways to test a fix that do not
involve images.  Images are the unicorn again.

If your wish is that I disengage from Sugar Labs, so that someone more
suited to your needs can be available, I'll do that, as it's probably
about the right time.

On Thu, Apr 21, 2016 at 10:10:45AM +0800, Tony Anderson wrote:
> I understand. At least that should put an end to your accusation of whining.
> 
> Tony
> 
> On 04/21/2016 10:03 AM, James Cameron wrote:
> >I don't have the network resources to prepare and upload images on
> >speculation.
> >
> >On Thu, Apr 21, 2016 at 09:58:31AM +0800, Tony Anderson wrote:
> >>James
> >>
> >>If you have an image you want tested that can be installed on an SD
> >>card for the XO-1, I'll make the time. Since the XO-1 has an early
> >>version installed,
> >>it should be possible to measure time for various operations. I
> >>probably won't realistically be able to devote time until mid-May.
> >>
> >>I generally advise teachers to have the students close the lid
> >>rather than shutdown between lessons. I also show them the frame and
> >>the number of running activities. Many impatient kids will have 10
> >>or more instances running. So restoring the throttle we once had
> >>would be very helpful - possibly more than swap.
> >>
> >>The Apple II was very successful in schools - anyone want to compare
> >>its performance with an XO-1? Generally, students at deployments did
> >>not buy the XO and do not have any other computer available. Here in
> >>the Philippines, smartphones and tablet are common. However, in
> >>Rwanda, the Nokia still reigns.
> >>
> >>Most importantly, the XO gives the students a chance to learn that
> >>they can make the computer do what they want it to do and not just
> >>accept what they are given.
> >>
> >>Tony
> >>
> >>On 04/21/2016 06:27 AM, James Cameron wrote:
> >>>On Wed, Apr 20, 2016 at 05:22:21PM -0400, Dave Crossland wrote:
> >>>>On 20 April 2016 at 16:46, James Cameron <[1]quozl at laptop.org> wrote:
> >>>>
> >>>>     the performance ratio between our low-cost
> >>>>     low-power hardware and the competition was already evident on Fedora
> >>>>     Linux; it didn't need Windows to expose it
> >>>>
> >>>>Sorry if this is an obvious question, but, can anything done to make
> >>>>Sugar feel faster on XO-1s today?
> >>>Yes, and I've been doing some of that in the past few months.  With
> >>>13.2.7 you have my latest work, which added swap and removed several
> >>>animations.
> >>>
> >>>Adding swap has mostly removed memory pressure.  Under memory
> >>>pressure, activity startup is roughly doubled, as the CPU spends time
> >>>thrashing in the memory management.  Disadvantage is higher power cost
> >>>and possibly decreased Flash endurance, although the endurance of a
> >>>set of heavily used XO-1 has shown no sign of the deterioration
> >>>expected by now.
> >>>
> >>>Removing animations has allowed CPU cycles to be better spent on
> >>>responsiveness.  At one stage we had 50/50 competition between the
> >>>activity launch animation and the starting activity.  Instrumenting
> >>>the frame and transition box animations showed there was enough time
> >>>for only one or two intermediate animation states before the final
> >>>state; which turned out to the cost of handling the function key
> >>>release event.  Some of these changes are not in Sugar master yet, but
> >>>in an OLPC branch; one such was proposed, but immediately closed with
> >>>appeal to process;
> >>>
> >>>	https://github.com/sugarlabs/sugar/pull/619
> >>>
> >>>As for what to do next; ideas are welcome, but here's a few;
> >>>
> >>>- profiling, of startup, of interactive response, (i've used xdotool
> >>>   for interactive response tests),
> >>>
> >>>- upgrade Gtk3, and GObject, to fix the memory leaks,
> >>>
> >>>- record metrics of response, deidentify, aggregate, and report.
> >>>
> >>>Although at this stage the interest in XO-1 should have degraded as
> >>>the units have degraded, and any return on investment is doubtful.
> >>>
> >>>Plenty of people left who whinge about XO-1, but ask them to test a
> >>>patch or release and no response.
> >>>
> >>>So it's more about people wanting their rainbow pooing unicorns.
> >>>Unrealistic expectations, polarised framing, denial, and consequent
> >>>unwillingness to be involved.
> >>>
> >>>>[...]
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> 
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-- 
James Cameron
http://quozl.netrek.org/