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[Pharo-project] Monticello Browser messing up Morphic?
by Sean P. DeNigris May 22, 2012

May 22, 2012

Every time I go to save a package in the latest 2.0, the world gets messed up like http://code.google.com/p/pharo/issues/detail?id=5013. It seems to start when I click "Save" and the commit message editor comes up. If I drag it around, it leaves a trail (the Process Browser shows a "nil" process at the UI priority in addition to the UI process). Once I accept the comment, MC Browser gets that big red X thing replacing the list on the left. Is anyone else seeing this? Sean -- View this message in context: http://forum.world.st/Monticello-Browser-messing-up-Morphic-tp4631248.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

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Re: [Pharo-project] [Sugar-devel] Dr.Geo on XO 1
by Marcus Denker May 22, 2012

May 22, 2012

can you add an issue to the tracker? Then we can collect there all information that we have *and* we make sure that we are constantly reminded to look at it... On May 20, 2012, at 9:42 PM, Hilaire Fernandes wrote: > Is the memory object corrupted in Pharo 1.4? And explain the problem I > have in some situation with DrGeo on XO-1 256MB without swap. > > http://lists.squeak.org/pipermail/vm-dev/2012-May/010652.html > > Hilaire > > > Le 20/05/2012 13:57, Hilaire Fernandes a Ã©crit : >> With Pharo 1.4 (but not with Pharo 1.3) we have a problem leading to the >> crash of DrGeo (based on Pharo 1.4) on low memory machine. >> >> It is clearly a problem related to Pharo 1.4 >> >> Any idea why ? >> >> Hilaire >> >> >> -------- Original Message -------- >> Subject: Re: [Sugar-devel] Dr.Geo on XO 1 >> Date: Sun, 20 May 2012 13:46:01 +0200 >> From: Bert Freudenberg <bert(a)freudenbergs.de> >> To: Sascha Silbe <silbe(a)activitycentral.com> >> CC: Ariel Calzada <ariel.calzada(a)gmail.com>, Hilaire Fernandes >> <hilaire.fernandes(a)edu.ge.ch>, Sugar Devel >> <sugar-devel(a)lists.sugarlabs.org>, Rafael Ortiz >> <rafael(a)activitycentral.com> >> >> >> >> On 20.05.2012, at 11:00, Sascha Silbe wrote: >> >>> Bert Freudenberg <bert(a)freudenbergs.de> writes: >>> >>>> Nope, that was not it. I compiled with -mtune=geode, makes no >>>> difference. >>> >>> Make sure to set -march=<architecture> to something appropriate. -march >>> tells gcc what instructions it can use (so anything that doesn't support >>> these instructions will fail to run the resulting executable), whereas >>> -mtune only tells it to optimise for a certain processor type (but the >>> executable will continue to run on other processors as long as they >>> support the instruction set specified by -march). >> >> I actually had used "-march=pentiumpro -mtune=geode" as recommended here: >> >> http://wiki.laptop.org/go/Geode_LX >> >> and even with an additional -O0 it still crashes. >> >>> In gdb I see it's segfaulting inside the GC logic. It's really >>>> puzzling this only happens on the XO-1 ... >>> >>> You could try booting an XO-1.5 with mem=256M (append that to boot-file >>> in /bootpart/boot/olpc.fth) to simulate the memory pressure of an XO-1. >> >> >> YES! That reproduces the crash on XO-1.5. Good thinking! :) >> >> I could also reproduce it in a virtual Ubuntu 12 with 768 MB RAM (!) but no swap. Top reports: >> >> Mem: 766204k total, 601588k used, 164616k free, 45624k buffers >> Swap: 0k total, 0k used, 0k free, 277024k cached >> >> but DrGeo still crashes. >> >> OTOH, Etoys runs fine using the same Squeak VM on the same system (and on XO-1). So I wonder what the new DrGeo does differently ... >> >> - Bert - >> >> >> >> >> > > -- Marcus Denker -- http://marcusdenker.de

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Re: [Pharo-project] Monticello Browser messing up Morphic?
by Marcus Denker May 22, 2012

May 22, 2012

On May 22, 2012, at 12:24 AM, Sean P. DeNigris wrote: > Every time I go to save a package in the latest 2.0, the world gets messed up > like http://code.google.com/p/pharo/issues/detail?id=5013. It seems to start > when I click "Save" and the commit message editor comes up. If I drag it > around, it leaves a trail (the Process Browser shows a "nil" process at the > UI priority in addition to the UI process). Once I accept the comment, MC > Browser gets that big red X thing replacing the list on the left. > > Is anyone else seeing this? > yes. I added a report: http://code.google.com/p/pharo/issues/detail?id=5938 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] [update 2.0] #20087
by Marcus Denker May 22, 2012

May 22, 2012

20087 ----- Issue 5933: cleanup use of Referencestream to load serialized fonts http://code.google.com/p/pharo/issues/detail?id=5933 Issue 5937: Continue cleaning ReferenceStream http://code.google.com/p/pharo/issues/detail?id=5937 Issue 5915: Cleaning Icons http://code.google.com/p/pharo/issues/detail?id=5915 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] addDeferredUIMessage: Documentation
by Sean P. DeNigris May 22, 2012

May 22, 2012

I want to add a good comment to addDeferredUIMessage:. I know we use it whenever we're updating Morphic from a background thread, but I've read stuff saying to use it when Morphic is not in a "sane" state. When, if ever, would you call addDeferredUIMessage: from the UI thread? I posted the following to the Squeak list 2 years ago.... I'm trying to add some documentation to addDeferredUIMessage:. What's a good summary on this method? I collected the following snippets from the web... If you want to run something that accesses the Morphic UI, even though you are not running from somewhere that the UI is in a sane state, you should normally use addDeferredUIMessage:. Otherwise, you can put Morphic into extremely confused states.... Per Ned Konz @ http://wiki.squeak.org/squeak/528: Deferred UI messages are processed in the middle of the Morphic event loop, just after responding to events, and before doing other step methods and displaying the world. Look for implementors of #addDeferredUIMessage:, look at the one in WorldState, look for senders of #deferredUIMessages, and you'll see WorldState>>runStepMethodsIn: which empties the queue. And it's called from doOneCycleNowFor: which is the body of the main Morphic event loop. Per http://wiki.squeak.org/squeak/5689: If you want to run something that accesses the Morphic UI, even though you are not running from somewhere that the UI is in a sane state, you should normally use addDeferredUIMessage:. Otherwise, you can put Morphic into extremely confused states.... Per Wilhelm K Schwab @ http://forum.world.st/Fwd-MouseOverHandler-td1300474.html#a1300474: provides a clean way to interact with the GUI from background threads Per http://www.visoracle.com/squeak/faq/containerless.html: As it is now, it's quite simple to put long-running computations in background threads; you just don't let the background threads call methods directly on Morphs. We have addDeferredUIMessage: to queue up action from the background threads for later execution in the UI thread during the next window cycle. Sean -- View this message in context: http://forum.world.st/addDeferredUIMessage-Documentation-tp4631251.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

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[Pharo-project] DateAndTime>>asDosTime
by Sean P. DeNigris May 21, 2012

May 21, 2012

asDosTime "answer number of seconds since Dos epoch (midnight Jan 1, 1980, UTC)" ^((self offset: Duration zero) - self class dosEpoch) asSeconds Everything I found online says that DOS date/times are bit masked: http://blogs.msdn.com/b/oldnewthing/archive/2003/09/05/54806.aspx http://mindprod.com/jgloss/zip.html http://mail.python.org/pipermail/python-list/1999-December/614399.html 32 bits: |Y|Y|Y|Y|Y|Y|Y|M| |M|M|M|D|D|D|D|D| |h|h|h|h|h|m|m|m| |m|m|m|s|s|s|s|s| Am I missing something, or is this a bug? Sean -- View this message in context: http://forum.world.st/DateAndTime-asDosTime-tp4630789.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

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[Pharo-project] Pharo conference schedule
by StÃ©phane Ducasse May 21, 2012

May 21, 2012

Hi guys I'm fighting a bit with the google calendar and the program. Here are the latest schedule. Remember that we want to have discussions.

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May 21, 2012

> Reportedly Pharo 1.3 works fine. Only Pharo 1.4 has been seen crashing so far: > > http://lists.sugarlabs.org/archive/sugar-devel/2012-May/037490.html > > And I just tried Squeak 4.3. No problem. > > - Bert - > From: Bert Freudenberg <bert(a)freudenbergs.de> > Subject: Re: [Vm-dev] Linux 4.4.7.2357 VM crash under memory pressure > Date: May 21, 2012 11:14:39 AM GMT+02:00 > To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > Reply-To: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> > > > > On 21.05.2012, at 04:32, David T. Lewis wrote: > >> >> On Sun, May 20, 2012 at 08:55:18PM +0200, Bert Freudenberg wrote: >>> >>> >>> On 20.05.2012, at 19:35, David T. Lewis wrote: >>> >>>> >>>> On Sun, May 20, 2012 at 03:08:20PM +0200, Bert Freudenberg wrote: >>>>> >>>>> Hilaire discovered that his newest DrGeo segfaults on the XO-1. It works fine elsewhere, including the XO-1.5, which has pretty much the same OS. >>>>> >>>>> We narrowed down the problem to the XO-1 having only 256 MB of RAM and no swap space. I can reproduce the crash in a virtual Ubuntu 12 with 768 MB RAM (!) but no swap. Top reports: >>>>> >>>>> Mem: 766204k total, 601588k used, 164616k free, 45624k buffers >>>>> Swap: 0k total, 0k used, 0k free, 277024k cached >>>>> >>>>> but DrGeo still crashes. Etoys runs fine using the same Squeak VM on the same system (and on XO-1). DrGeo is based on Pharo 1.4, using a closure image. Etoys still is pre-closure. >>>>> >>>> >>>> I recall some recent discussion on the Pharo list about some "strange objects" >>>> that had entered the image for a period of time. It was something to do with >>>> a mismatch in the number of instance variable slots. The VM crash is happening >>>> in a method that is stepping through the fields of an object, so if something >>>> was out of whack there it might well lead to problems. >>>> >>>> The discussion started here: >>>> >>>> http://lists.gforge.inria.fr/pipermail/pharo-project/2012-May/064539.html >>>> >>>> It would be worth checking if the DrGeo image might have this issue, in >>>> case those objects might for some reason be interacting badly with the >>>> garbage collector. >>>> >>>> Dave >>> >>> Interesting. However, it's strange that this would manifest only on machines with less memory - shouldn't the VM topple over at the first GC no matter what? >>> >> >> I don't see any obvious reason why the small memory would make a difference >> either. I'm really just trying to think of things that might be different in >> this case. The failure seems to be happening in GC code that has not changed >> in recent years, but it's happening after calling a method that depends on >> object header format (#lastPointerWhileForwarding:), and it is happening in >> code the iterates over the fields of an object. Beyond that I'm just totally >> guessing. >> >> Dumb question - do you know if any other closure-enabled images have this >> problem on small memory systems? I'd have thought someone would have noticed >> by now, but maybe not. >> >> Dave

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Re: [Pharo-project] Place to sleep Lille?
by Marcus Denker May 21, 2012

May 21, 2012

On May 21, 2012, at 1:27 PM, Stephan Eggermont wrote: > Hi, > > Hmm. I'm a bit late to make a hotel reservation. Most hotels seem to be > booked out. Anyone know an alternative? I'm arriving by train on wednesday. > Couch would do. Sadly my couch is already booked... Marcus -- Marcus Denker -- http://marcusdenker.de

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May 21, 2012

Hi guys We are happy to say that there are 57 participants to the pharo conf starting thursday. http://rmod.lille.inria.fr/web/pier/Events Stef

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