Squeak-dev March 2005

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147 participants
281 discussions

Multithreading
by Daniel Salama 31 Mar '05

31 Mar '05

Hi, I'm experiencing a bit of a problem with a simple task I'm doing. I'm trying to read a file and print something in the Transcript window while reading the file. The problem I find is that while Squeak is reading the file, the VM dedicates 100% of its processor time to that task. On the same VM, I'm running Seaside, so while the VM is reading the file, Seaside cannot render any pages. Any suggestions on how to overcome this problem? Thanks, Daniel

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Re: Magma (was: ODBMS querying (was: Multithreading))
by Chris Muller 30 Mar '05

30 Mar '05

> I'm glad to hear this. http://minnow.cc.gatech.edu/squeak/2665 starts > off with this: > > 2/16/2004 - NOTE, all Magma pages are being updated for an impending > ... > Judging from the date I thought maybe it was dead. Nope, just late. Expect > > It is still not ready for commercial though. > > > One missing feature of earlier versions particularly concerned me: > transactionns are not atomic in the case of radical failure (power > out, process killed). In other words, such an event could leave the > database in a corrupt state. Has that changed? No, and that is a major reason for my above statement. It is finally near the top of my list, though. > I have an app that desperately needs a db, and I've been considering > magma. I also need the time to make the change :) If you have any questions or issues, please let me know. > It would probably be good to update the swiki. Yes. It's getting to the point where it'd be nice to have more people pounding on it, will do. - Chris

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Re: Magma (was: ODBMS querying (was: Multithreading))
by Chris Muller 30 Mar '05

30 Mar '05

Hi Daniel, > Is there anything other than Magma_server-cmm and Magma_client-cmm > needed? Actually yes. Make sure you have the latest version of Monticello loaded (231 I think). You are not the only one who wants one-click loadability, therefore I have integrated the base fixes in the harvesting-queue directly into the packages as overrides. Therefore, just load the latest Magma server or Magma tester from SqueakSource. It should work in 3.7 or 3.8gamma. If you have any questions or issues, please feel free to let me know. Cheers, Chris

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ODBMS querying (was: Multithreading)
by Chris Muller 30 Mar '05

30 Mar '05

Marten Feldtmann wrote: > OODBMS (Versant, Objectivity or Gemstone) have indices like the relational > counterparts, which can speed up a query very much !!! No one mentioned Magma, which supports large, indexed collections out-of-the-box. It quickly and transparently pages to whatever key-range of a LargeCollection you specify, and presents it in key order. While it, too, has very slow bulk-load performance, I hope to alleviate that soon (I have been focusing on performance improvements for the last month or two). > I always looked at persistency solutions and all I have to say is, > that I always went back to relational databases due to these problems > you mention. "These problems" are usually symptomatic of domain-models derived from "thinking in tables." Many corporate applications these days seem to have a "spreadsheet" look-and-feel to them; lots and lots of tables of "data" everywhere. Where are the objects? A: There aren't any, at least not as far as the user is concerned. For complex domain models, I believe a ODBMS will perform 10 - 100x faster than a relational solution, not to mention the corresponding reduction-factor in development time/effort. For simple models with just a few massive tables, relationals will be faster (maybe 2-3x). One day, corporate software will provide regular-users with encapsulation of their "data" into objects. Hollywood offers a glimpse of something like that in "The Matrix Reloaded," that white-screen hover-craft traffic-controller thing..

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Re: Magma (was: ODBMS querying (was: Multithreading))
by Chris Muller 30 Mar '05

30 Mar '05

> Great!!! What is the current status of Magma? Magma has been rocking the last few months. There are many new features since 1.0gamma7 such as live class-evolution, support for concurrent development, forwarding proxies, support most kinds of objects including Projects, nested transactions and a lot more. It is still not ready for commercial though. > Do you have a Monticello repository for Magma? Yes, http://kilana.unibe.ch:8888/MagmaTester. This is the under-development version but still more stable than the one on SqueakMap. > Or do I need to try the latest from SqueakMap? No, that's very old (1.0gamma7), don't use that one. I hope to replace it soon (< June) after I finish a finite list of important to-do items, including better documentation. - Chris

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Re: [croquet] bug hunting
by orion elenzil 30 Mar '05

30 Mar '05

Thanks Andreas. I will try these. Orion Andreas Raab andreas.raab-at-gmx.de |squeak devlists| wrote: > Hi Orion - > > Well, debugging these issues goes roughly like follows: > * You go to squeak.hpl.hp.com and choose to "browse the VM repository" > * Here you navigate to > trunk/platforms/Cross/plugins/B3DAcceleratorPlugin > * Look at sqOpenGLRenderer.c to find line 409 (you probably have to > download the file and use a reasonable text editor to find it) > * Line 409 is in glSetTransform: > 407: DPRINTF(5, (fp, "### Installing new transformations\n")); > 408: glMatrixMode(GL_PROJECTION); > 409: ERROR_CHECK; > > So it looks like glMatrixMode() is failing, right? Wrong! The > ERROR_CHECK macro uses glGetError() and glGetError() will keep the error > around until it has been reported. So the only thing we know is that > sometime *before* the method was called the error has occured. Time to > look at the Squeak side. > > The easiest (and likely best) thing to do is to throw in an occasional > glGetError() check in your own code and print it to the transcript. Here > is a safe way way of doing this: > > printError: ogl > err := ogl glGetError(). > err = 0 ifFalse:[ > WorldState addDeferredUIMessage:[ > Transcript cr; show: 'OpenGL error: ', err hex. > ]. > ]. > > This will print out any errors and from here it's basically divide and > conquer - just use binary search (or random guesses ;-) to narrow down > where the error occurs. > > The exercise left for the reader: Write a OpenGLErrorTrap class which > automatically checks for the first occurance of a glGetError() after > invoking any of the OpenGL methods. Hint: Make it a ProtoObject subclass > and learn more about proxies ;-) > > Cheers, > - Andreas > > orion elenzil wrote: > >> any tips how i'd track down a bug like this ? >> i'm getting one per frame, it looks like. >> >> from squeak3d.log: >> >> ERROR (file sqOpenGLRenderer.c, line 409): a GL function failed -- >> GL_INVALID_ENUM >> >> >> tia, >> orion >> >> >> >> >> --- >> You are currently subscribed to croquet as: andreas.raab(a)gmx.de >> To unsubscribe send a blank email to leave-croquet-872834H(a)lists.wisc.edu >> >> > > --- > You are currently subscribed to croquet as: sv04er502(a)sneakemail.com > To unsubscribe send a blank email to leave-croquet-872834H(a)lists.wisc.edu

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REMINDER: Harvesting Party Thursday March 31st 17:00 GMT
by Ken Causey 30 Mar '05

30 Mar '05

Just a reminder that the next Harvesting Party will take place between 17:00 (5 PM) and 21:00 (9 PM) GMT Thursday March 31st, 2005. As usual we will meet in #squeak on irc.freenode.net. More information about the #squeak IRC channel can be found at http://people.squeakfoundation.org/article/7.html Information about the Harvesting Party idea can be found at http://people.squeakfoundation.org/article/29.html If you have the time please attend and work toward the future of Squeak. The next seven parties are scheduled for 21:00 (09:00 PM) GMT Monday April 04, 2005 01:00 (01:00 AM) GMT Saturday April 09, 2005 05:00 (05:00 AM) GMT Wednesday April 13, 2005 09:00 (09:00 AM) GMT Sunday April 17, 2005 13:00 (01:00 PM) GMT Thursday April 21, 2005 17:00 (05:00 PM) GMT Monday April 25, 2005 21:00 (09:00 PM) GMT Friday April 29, 2005

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About speed of the environment
by stéphane ducasse 30 Mar '05

30 Mar '05

Hi diego I got some discussion with marcus and I would like to know whether you are planning to continue to work on the new look for 3.9. I think that 3.9 should be much more snappy that it is now. It is important to identify the bottleneck and cure it. Else everybody will be impacted and 3.9 will not be usable. Stef

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Hung Squeak
by Daniel Salama 30 Mar '05

30 Mar '05

Hi guys (it's me again :) ) Question: I ran a process in Squeak and by mistake I wrote in my code to inspect a variable inside of a loop. Now, when the process is run, the code tries to open 127,000+ inspect windows and so far the VM seems unresponsive (wouldn't be surprised). Is there a way to force the code to stop running? What I'm really interested in is saving the code that I wrote (I ran the process before saving the image). Is there a way to save a copy of a running image while the VM is unresponsive? I'd hate to have to retype all my code. Thanks, Daniel Daniel Salama dsalama(a)user.net Voice: (954) 655-8051 Fax : (954) 252-3988 ------------------------ This e-mail contains information which may be confidential and privileged. Unless you are the addressee (or authorized to receive for the addressee), you may not use, copy or disclose to anyone the message or any information contained in the message. If you have received the message in error, please advise the sender by reply e-mail to dsalama(a)user.net or tel. +1-954-655-8051 and delete the material from any computer.

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[ANN] Tamaris released on SqueakMap
by Alain Plantec 30 Mar '05

30 Mar '05

Hy all, A small release for - bogues fix; - changed 'auto taxon' sources managment; - new dependency for multiselection : MultiSelectionInList. See http://cassoulet.univ-brest.fr:8000/squeak/4 for more informations about Tamaris. alain

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