Squeak-dev June 2001

squeak-dev@lists.squeakfoundation.org

122 participants
362 discussions

Re: Very slow performance on faster machine
by John Hinsley 29 Jun '01

29 Jun '01

Tim Cuthbertson wrote: > Good Lord, who would have thunk (sic) that 1/4 gig of RAM wouldn't be enough > on a PC? > Who indeed? But then, who would have thought that 128Mb of PC133 would cost $20? I remember paying twice that for 64Mb only last Christmas! (Dammit!) And about the same for 8Mb of FastPage a couple of years before. The defrag issue does seem a bit wierd. But I wonder if a delete, defrag and re-install would help? Or you might like to try stopping the management server. I'm not sure what Oracle does on/to NT, but I know it wants to play about with the kernel (and grab a huge amount of RAM) on Linux. -- Which (as well as my calculating that I'd never, ever be able to afford to run it commercially) is why I use MySQL. But that's another story. There are so many interesting (and instructive) possibilities: I hope you keep fiddling with it! Cheers John -- ****************************************************************************** Marx: "Why do Anarchists only drink herbal tea?" Proudhon: "Because all proper tea is theft." ******************************************************************************

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how did i get unsubscribed?
by Brian Rice 29 Jun '01

29 Jun '01

I didn't receive any Squeak mail for about 48 hours there, only to test mail and found out that I had to re-subscribe. Does anyone know how this might have happened? I do use email re-routing between two accounts, but this has not changed recently. Thanks, ~

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[ENH] Simple EToyTextNode Menu
by Laurence Rozier 28 Jun '01

28 Jun '01

Hi, This changeSet provides a minimalist(style, size and color) set of cmd-6 menu options for EToyTextNode objects. It is a work in progress which refactors the changeEmphasis: method in an attempt to add clarity and flexibility. It evolve into a more generic approach for ParagraphEditor and TextMorphEditor but it serves what has become for me a pressing immediate need. I'm refining an outliner-based tool which needs to allow for easy text editing. Is anyone already working on refactoring changeEmphasis:? Cheers, Laurence PS This code works in 3.1 at updates 3848 and 4173. It *should* work in 3.0 after 3642 where MenuMorph adds a new method it uses. __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/

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Re: A problem with startUp messages
by Kevin Fisher 28 Jun '01

28 Jun '01

Hi Bob: Thanks for the info...I'll regenerate my interpreter and see how things go. I checked Ian's site and 3.0-beta2 is still the latest and greatest (which is what I use). On Thu, Jun 28, 2001 at 12:36:28PM -0400, Bob Arning wrote: > Kevin, > > Generating a new interp.c from a current image will deal with the exception stuff, but you might see if any of the *n*x gurus can point you to a shortcut. Or you might try Ian Piumarta's site -- maybe there is a sufficiently recent VM there. > > Cheers, > Bob > > On Thu, 28 Jun 2001 07:17:23 -0400 Kevin Fisher <kgf(a)golden.net> wrote: > >This could then explain some oddness I'm seeing with text selections in Genie > >as well. I'm using the stock UNIX VM from the ftp site...I'm assuming that it > >is lagging significantly behind the patches that have been flying around this > >list the past several months. > > > >Can this be rectified by generating a new interp.c, or is there a patch on the > >sqfixes archive? > > > > > > > >> Kevin, > >> > >> This is a due to a VM which does not have the latest exception handling code. If you can't easily get a suitable VM, you can work around this problem by changing > >> > >> file _ [fd readOnlyFileNamed: keysFileName] > >> on: FileDoesNotExistException do:[:ex| nil]. > >> > >> to > >> > >> file _ [fd readOnlyFileNamed: keysFileName] > >> on: FileDoesNotExistException do:[:ex| ex resume: nil]. > >> >

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[ENH] Class Extensions
by Brent.Pinkney＠reuters.com 28 Jun '01

28 Jun '01

Hi, In an attempt to make more Squeak more modular I have implemented a Extensions class similar to those found in VisualAge. This is my first cut I have the gall to publish. 1. Concept ---------- We can define methods in system categories different to the one in which the class is defined. These methods can then be installed and deinstalled. 2. Architecture --------------- For now I have made Extension a subclass of ClassDescription to inherit all the methods used by Browser. ie ProtoObject Object Behavior ClassDescription Class Metaclass Extension 3. Look and Feel ---------------- New extensions are defined in the Browser as such: Smalltalk extend: #String category: 'Kernel-Numbers' The extension then appears in the browser as: String (extension) As this point methods can be added and removed as normal. These methods cannot be used until they are installed. 4. Workspace ------------ 4.1. The extensions of a class can be found by evaluating: String extensions. 4.2 Just as the printString for a class or metaclass class can be evaluated to return the object, so the printString for a class can be evaluated to return the printString instance. String extensions first -> String extensionIn: 'Kernel-Numbers' 5. Filein/FileOut ------------------ An extension can be filed in and out as a .st file. Currently ChangeSets are not supported. Advice would be appreciated. 6. ToDo ------- 6.1. I have not yet decided how to support extension methods for the class side of a class. Advice appreciated. 6.2. Support for ChangeSets is missing. 6.3. Support to refactor existing classes into extensions. Scripts, etc. 6.4. What to do about ImageSegments. Advice appreciated. 6.5. Removing the extension from the image. 6.5. General enhancements. 7. Samples ---------- 7.1 The Extensions change set. 7.2 A file out of an extension to String. File it in and try to evaluate: 'foo' asNil. Now browse category 'Kernel-Numbers'. You will see the exntesion in the class list. Select the install menu option. Now try 'foo' asNil. Voila ! 8. Advanced ----------- For elegance and symmetry with the definition string for an extension, modify Preferences>>#printDefinitionInEnvironment to return true. Now browse classes defined in the environment (Smalltalk). It is time. 9. Comments ----------- I have always thought that extensions were one of the most useful and elegant features in VisualAge as they encourage terse conversion methods, locality, etc. Having had the dubious priviledge of evaluating C#, I predict that one day C#/Java/C++ et al. will introduce extensions into the language and claim it as the New Greatest Thing. eg. namespace acme.stuff { extension System.string { public object toNil() { return nil; } } } To the masses, Java pretended garbage collection was an innovation, Javascript suggested dynamic typing was new; let nail this one please. PS. I will be back on Monday to reply. Cheers Brent (See attached file: Extensions.46.cs) (See attached file: String (extension).st) ----------------------------------------------------------------- Visit our Internet site at http://www.reuters.com Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Reuters Ltd.

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Re: A problem with startUp messages
by Kevin Fisher 28 Jun '01

28 Jun '01

This could then explain some oddness I'm seeing with text selections in Genie as well. I'm using the stock UNIX VM from the ftp site...I'm assuming that it is lagging significantly behind the patches that have been flying around this list the past several months. Can this be rectified by generating a new interp.c, or is there a patch on the sqfixes archive? > Kevin, > > This is a due to a VM which does not have the latest exception handling code. If you can't easily get a suitable VM, you can work around this problem by changing > > file _ [fd readOnlyFileNamed: keysFileName] > on: FileDoesNotExistException do:[:ex| nil]. > > to > > file _ [fd readOnlyFileNamed: keysFileName] > on: FileDoesNotExistException do:[:ex| ex resume: nil]. > > Cheers, > Bob > > On Wed, 27 Jun 2001 22:06:46 -0400 Kevin Fisher <kgf(a)golden.net> wrote: > >To follow up a bit on this: I've tracked things down a bit further. The > >method that is hanging is SecurityManager>>loadSecurityKeys. > > > >It is hanging at this point: > >.. > >.. > >file _ [fd readOnlyFileNamed: keysFileName] > > on: FileDoesNotExistException do:[:ex| nil]. > > > >file ifNil:[ ^self]. "no keys file" > > > >.. > >.. > > > >For some reason, during the start up of the image, the return from this method > >seems to deadlock..the rest of SecurityManager>>startUp never gets run. > > > >Again, if you run the startUp manually after the image has started, it works > >just fine...

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Re: A problem with startUp messages
by Bob Arning 28 Jun '01

28 Jun '01

Kevin, This is a due to a VM which does not have the latest exception handling code. If you can't easily get a suitable VM, you can work around this problem by changing file _ [fd readOnlyFileNamed: keysFileName] on: FileDoesNotExistException do:[:ex| nil]. to file _ [fd readOnlyFileNamed: keysFileName] on: FileDoesNotExistException do:[:ex| ex resume: nil]. Cheers, Bob On Wed, 27 Jun 2001 22:06:46 -0400 Kevin Fisher <kgf(a)golden.net> wrote: >To follow up a bit on this: I've tracked things down a bit further. The >method that is hanging is SecurityManager>>loadSecurityKeys. > >It is hanging at this point: >.. >.. >file _ [fd readOnlyFileNamed: keysFileName] > on: FileDoesNotExistException do:[:ex| nil]. > >file ifNil:[ ^self]. "no keys file" > >.. >.. > >For some reason, during the start up of the image, the return from this method >seems to deadlock..the rest of SecurityManager>>startUp never gets run. > >Again, if you run the startUp manually after the image has started, it works >just fine...

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A problem with startUp messages
by Kevin Fisher 28 Jun '01

28 Jun '01

Hi folks: I've been working with David Lewis, trying to figure out why OSProcess has been leaving behind <defunct> zombie processes. It turns out, the problem isn't with OSProcess at all... In my image, the SystemDictionary's StartUpList has UnixOSProcessAccessor later in the ordered collection, after SecurityManager. When the image gets restarted, only classes iterated over the StartUpList up to and including SecurityManager receive the startUp message. After that, SystemDictionary>> send:toClassesNamedIn:with: terminates prematurely, leaving several classes not restarted (including UnisOSProcessAccessor, the source of the OSProcess zombies). Actually I'm not sure it terminates at all, it seems to get stuck at SecurityManager. It looks as though SecurityManager class>>startUp never returns...but only during startup. Once the image is up and running, doing a SecurityManager startUp seems to work just fine...it's only during the startup that something funny happens. The trick is to put Transcript show: scaffolding around 'self default startUp' in SecurityManager class>>startUp...open a Transcript, save the image and quit, reload and watch what gets put in the Transcript. The first Transcript show: will appear, but the second does not. However, once the image is up, doing a SecurityManager startUp will show both Transcript show: 's. Perhaps some sort of deadlock is happening during the restart of the image? I'm a bit stumped at this point...any ideas? This is on the UNIX VM, with the latest changes in the 3.1 image.

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Re: Very slow performance on faster machine
by John M McIntosh 28 Jun '01

28 Jun '01

>Thanks, everybody. I will check into some of these suggestions when I get to >the office, tomorrow. > >Off the top of my head, my office PC is quite a workhorse on everything >except Squeak. I.e., on most stuff, it is quite fast. > >I did just get a new bank of memory installed about two months ago, and the >stuff that was the reason I was doubling the memory (Oracle database >administration apps written in Java) ran much faster after adding the new >memory. > >There is plenty of free disk space on the machine, and plenty of swap space. > >I defrag the disk, regularly (at least monthly, sometimes more). > >And the Squeak installation is very recent. Everything seems to work, >correctly, except for the sluggishness. Also, I just used the "1 factorial" >as an example (a real one, though) - everything I try to do in Squeak is >very slow. > >Being an Oracle DBA, I am a tuner, by nature. If my PC were generally that >slow, I would have fixed it a long time ago. I'd look at how much memory squeak has free to use. Invoke help menu, VM statistics and report back with the info. If you run squeak with very little free space then it tends to do a full GC, versus being able to do incremental GC work. (2) based on the image foot print and the type of GC work it is doing are you runnning into a paging issue? Smalltalk memory typically isn't very localized and a full GC touches all pages so if you do have paging going on as part of your normal minute to minute activity then you might be doing dozens of page faults per second. -- -- =========================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> 1-800-477-2659 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ===========================================================================

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Re: New zip
by Bruce ONeel 28 Jun '01

28 Jun '01

Henrik Gedenryd <Henrik.Gedenryd(a)lucs.lu.se> wrote: > I have put up a zip with the latest changes (4164). > > Henrik Thanks! Squeak3.1a-4164.zip is up on the ftp site in Squeak/3.0/unstable-testPilot. cheers bruce

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