Vm-dev April 2008

vm-dev@lists.squeakfoundation.org

16 participants
24 discussions

Profiling and delay accuracy
by Andreas Raab 06 Aug '11

06 Aug '11

Hi Folks - For a long time now I had this feeling that MessageTally reports pretty bogus results in many situations without being able to precisely track down why this would be the case. Today I was looking at primitiveResponse() and, much to my surprise, noticed that the checkForInterrupts() that used to be there for years is gone (see Squeak3.6 for example which still has it). The sole reason for this check was to get both high delay accuracy and good profiling behavior. Consider this example: fc := FormCanvas on: Display. MessageTally spyOn:[ 1 to: 100 do:[:i| fc fillColor: Color white. fc printString. ]. ]. Using 3.6 this will be measured correctly as: **Tree** 87.5% {243ms} FormCanvas>>fillColor: |87.5% {243ms} GrafPort>>fillRect:offset: | 87.5% {243ms} GrafPort>>copyBits 12.5% {35ms} FormCanvas(Object)>>printString 12.5% {35ms} FormCanvas(Object)>>printStringLimitedTo: whereas the 3.10 reports it as **Tree** 99.6% {670ms} FormCanvas(Object)>>printString 94.9% {639ms} primitives 4.6% {31ms} FormCanvas(Object)>>printStringLimitedTo: I think you can see the problem and just imagine what this does to any cumulative results. I also wonder what that change does to platforms that don't have high-resolution asynchronous timers. This used to be the one place where we would catch timer changes at high resolution and unless the platform forces high resolution timer interrupts asynchronously (by resetting the interrupt counter) we must be loosing a lot in terms of delay accuracy. (it just so happens that the Windows VM *does* do asynchronous timer interrupts so I never noticed this but I'm very curious about the difference on Linux which typically still has pretty bad timer granularity). Any opinions? My feeling is that the timer check should go back in for all of the above reasons. At the very least a quickCheckForInterrupt() is required but I actually think putting the full check back in is worth it. Cheers, - Andreas

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Joys of Squeak-dev image, VM Compiling on MacIntel and Spoon remote OtherBrowsing
by Ken G. Brown 16 Nov '10

16 Nov '10

MacPro OS X 10.4.9 Xcode 2.4.1 Squeak-dev-114-2, VMMaker 2.8b6.1, Squeak 3.8.15beta6U.app, and version 1657 of svn MacOS VM sources, and Spoon v2a12. Downloaded http://www.squeakvm.org/cgi-bin/viewcvs.cgi/ trunk version 1657 for MacOS Ran squeak-dev-beta-114-2.image on Squeak 3.8.15beta6U.app Loaded VMMaker 3.8b6.1 from dev image Universes. Generated vm sources by following instructions in <http://www.squeakvm.org/cgi-bin/viewcvs.cgi/trunk/platforms/Mac%20OS/vm/Doc…> Fought with Xcode wanting to use MacOSX10.3.9.sdk for ppc which was giving an error which was known and documented in the Readme. Finally figured out what Xcode wanted so built universal app just using 10.4.9 sdk. Couple issues: Exupery references remain in sqnamedPrims.h and sqPlatformSpecific.h from svn version 1657, I just commented them out. Notes said: Info-NPSqueak__Upgraded_.plist was to be found in the Developer directory. I could not find it so scammed a info.plist out of John's Squeak 3.8.15beta6U.app vm. Not sure what impact this has. And much, much diddling about figuring out various things... Finally got a build. It's a lot smaller (3.9MB) than John McIntosh's Squeak 3.8.15beta6U.app (8.1MB), and it looks like it is a PowerPC one but at least it runs. I'll look into the Xcode build process some more. Then: Replaced interp.c with Craig's interp.c for Spoon, rebuilt and got a VM with Spoon client stuff. Downloaded Spoon release 2a12. Moved a copy of Flow plugin from within Craig's naiad.app package into a plugins subdirectory where the new spoon client compatible MacIntel universal VM was run from. Followed Craig's Spoon instructions for loading niaid.st and niaid.pr into the 3.10 image (Squeak-dev-114-2) running on the new VM. Did the run spoon.app thing from Spoon.dmg (version 2a12), needs to be done twice if Safari is not running. Got Spoon processor running. Followed instructions again in the Spoon client and lo! Got OtherBrowser browsing the Spoon memory running on processor. Yay Craig! Who do i get to sign my certificate? :) Ken

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How to use Croquet VMMaker
by Matthew Fulmer 29 Apr '09

29 Apr '09

Hi. In anticipation of working on HydraVM, I am trying to test as close a configuration as possible to HydraVM without being hydra. That is, load the nearest ancestor VMMaker and C sources to hydra, and try to make a working VM. This should help ensure that there are no "normal" bugs once I switch to Hydra, only hydra bugs. So, I did that: Here is my setup: - Fedora core 7 on x86 processor - Release 3.9 image/VM from squeak.org - Load FFI from SqueakMap - Load VMMaker-ar.70 from http://jabberwocky.croquetproject.org:8889/Homebase/ - Checkout http://squeakvm.org/svn/squeak/trunk revision 1796 (The nearest ancestor of HydraVM) I pointed VMMaker at the platforms directory in the checkout, and told it to build source in platforms/unix/src. I selected all plugins to be external, but moved FilePlugin and SocketPlugin to be internal. Then I did mkdir unixbuild cd unixbuild ../platforms/unix/config/configure make make fails linking gnu-interp.o: /bin/sh /home/matthewf/squeak/vm/hydravm-trunk-base/unixbuild/libtool --mode=link gcc -g -O2 -fomit-frame-pointer -DLSB_FIRST=1 -export-dynamic -R/usr/local/lib -o squeak vm/vm.a FilePlugin/FilePlugin.a SocketPlugin/SocketPlugin.a disabledPlugins.o version.o -lutil -ldl -lm -lnsl vm/vm.a gcc -g -O2 -fomit-frame-pointer -DLSB_FIRST=1 -o squeak disabledPlugins.o version.o -Wl,--export-dynamic vm/vm.a FilePlugin/FilePlugin.a SocketPlugin/SocketPlugin.a -lutil -ldl -lm -lnsl vm/vm.a -Wl,--rpath -Wl,/usr/local/lib vm/vm.a(gnu-interp.o): In function `primitiveGetWindowLabel': /home/matthewf/squeak/vm/hydravm-trunk-base/unixbuild/vm/gnu-interp.c:15141: undefined reference to `ioGetWindowLabel' vm/vm.a(gnu-interp.o): In function `primitiveSetWindowLabel': /home/matthewf/squeak/vm/hydravm-trunk-base/unixbuild/vm/gnu-interp.c:18770: undefined reference to `ioSetWindowLabelOfSize' collect2: ld returned 1 exit status Building this VM worked when using the latest VMMaker from SqueakMap (VMMaker-tpr.58), everything else the same. Is there something else I need to do in order to build using the Croquet VMMaker? I want to use it specifically, since the Hydra VMMaker is derived from it. The dev notes on Hydra are at http://squeakvm.org/~sig/hydravm/devnotes.html -- Matthew Fulmer -- http://mtfulmer.wordpress.com/ Help improve Squeak Documentation: http://wiki.squeak.org/squeak/808

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Interpreter>>signed32BitValueOf: and signed64BitValueOf: broken
by Andreas Raab 26 Nov '08

26 Nov '08

Hi - I just noticed hat Interpreter>>signed32BitValueOf: and signed64BitValueOf: are broken for edge cases. The following example will illustrate the problem: array := IntegerArray new: 1. array at: 1 put: 16rFFFFFFFF. "should fail but doesn't" array at: 1. "answers -1 incorrectly" array := IntegerArray new: 1. array at: 1 put: -16rFFFFFFFF. "should fail but doesn't" array at: 1. "answers 1 incorrectly" The problem is that both signed32BitValueOf: as well as signed64BitValueOf: do not test whether the high bit of the magnitude is set (which it mustn't to fit into a signed integer). The fix is trivial in both cases - basically all that's needed at the end of both functions is this: "Filter out values out of range for the signed interpretation such as 16rFFFFFFFF (positive w/ bit 32 set) and -16rFFFFFFFF (negative w/ bit 32 set). Since the sign is implicit in the class we require that the high bit of the magnitude is not set which is a simple test here" value < 0 ifTrue:[^self primitiveFail]. negative ifTrue:[^0 - value] ifFalse:[^value] Cheers, - Andreas

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New plugin support
by Ian Piumarta 21 Jul '08

21 Jul '08

Hi, I'm about to commit (add) cross-platform directories to support GStreamerPlugin and OggPlugin. If anyone thinks this is a bad idea, please speak now. (FYI: the unix tree will also be getting ClipboardExtendedPlugin, DBusPlugin, RomePlugin and ImmX11Plugin in the same commit.) Cheers, Ian

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Link error
by Gwenaël Casaccio 27 Apr '08

27 Apr '08

Hi, I've a problem when I try to compile squeak to windows xp, when the makefile try to create the squeak.exe it fails due to link error. Do you have any idea of the problem ? Cheers Gwenael Casaccio

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Re: Where can I find details on the Squeak image format?
by Bert Freudenberg 25 Apr '08

25 Apr '08

On 25.04.2008, at 10:57, Robert Wierschke wrote: > Hi, > > where can I find detailed Information on the Squeak image format? See Interpreter>>writeImageFile: Or do you mean the object memory layout? > As well as information on the difference between Squeak 2.2 and > Squeak 3.9 (3.10) image formats. I believe there are none. Or very insignificant ones if at all. - Bert -

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Fwd: Where can I find details on the Squeak image format?
by Robert Wierschke 25 Apr '08

25 Apr '08

---------- Forwarded message ---------- From: Robert Wierschke <wierob83(a)googlemail.com> Date: 2008/4/25 Subject: Where can I find details on the Squeak image format? To: vm-dev(a)lists.squeakfoundation.org Hi, where can I find detailed Information on the Squeak image format? As well as information on the difference between Squeak 2.2 and Squeak 3.9 (3.10) image formats. thanks in advance robert

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[Fwd: Re: [Vm-dev] New plugin support]
by Andreas Raab 22 Apr '08

22 Apr '08

(forwarded Josh's response) -------- Original Message -------- Subject: Re: [Vm-dev] New plugin support Date: Tue, 22 Apr 2008 10:57:03 -0700 From: Joshua Gargus <josh.gargus(a)qwaq.com> To: Andreas Raab <andreas.raab(a)gmx.de> CC: Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> References: <B95B2EA9-C0F5-4996-9475-75C99381BA7C(a)speakeasy.net> <480E0F24.4070504(a)gmx.de> No problems with the GStreamerPlugin so far. Josh On Apr 22, 2008, at 9:15 AM, Andreas Raab wrote: > Josh was just looking at GStreamer. I don't think he has any > problems but just in case I'm cc-ing him for comments. > > - A. > > Ian Piumarta wrote: >> Hi, >> I'm about to commit (add) cross-platform directories to support >> GStreamerPlugin and OggPlugin. If anyone thinks this is a bad >> idea, please speak now. >> (FYI: the unix tree will also be getting ClipboardExtendedPlugin, >> DBusPlugin, RomePlugin and ImmX11Plugin in the same commit.) >> Cheers, >> Ian

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changes to Cross headers files
by Ian Piumarta 22 Apr '08

22 Apr '08

Hi, I'm about to commit a few changes to the Cross sources to support the OLPC VM and its virtual image. If anyone has any objections, now is the time to raise them. Cheers, Ian Index: plugins/DropPlugin/DropPlugin.h =================================================================== --- plugins/DropPlugin/DropPlugin.h (revision 1742) +++ plugins/DropPlugin/DropPlugin.h (working copy) @@ -9,4 +9,5 @@ int dropRequestFileHandle(int dropIndex); /* return READ-ONLY file handle OOP or nilObject if error */ int sqSecFileAccessCallback(void *); void sqSetNumberOfDropFiles(int numberOfFiles); -void sqSetFileInformation(int dropIndex, void *dropFile); \ No newline at end of file +void sqSetFileInformation(int dropIndex, void *dropFile); +void sqDragTriggerData(char *aByteArray, int dataLength, char *aFormat, int formatLength); Index: plugins/SoundPlugin/SoundPlugin.h =================================================================== --- plugins/SoundPlugin/SoundPlugin.h (revision 1742) +++ plugins/SoundPlugin/SoundPlugin.h (working copy) @@ -18,5 +18,10 @@ int snd_StopRecording(void); double snd_GetRecordingSampleRate(void); int snd_RecordSamplesIntoAtLength(int buf, int startSliceIndex, int bufferSizeInBytes); -void snd_Volume(double *left, double *right); // johnmci(a)smalltalkconsulting.com Nov 6th 2000 -void snd_SetVolume(double left, double right);// johnmci(a)smalltalkconsulting.com Nov 6th 2000 +void snd_Volume(double *left, double *right); /* johnmci(a)smalltalkconsulting.com Nov 6th 2000 */ +void snd_SetVolume(double left, double right); /* johnmci(a)smalltalkconsulting.com Nov 6th 2000 */ + +/* mixer interface */ +int snd_GetSwitch(int id, int captureFlag, int channel); +int snd_SetSwitch(int id, int captureFlag, int parameter); +int snd_SetDevice(int id, char *name); Index: vm/sq.h =================================================================== --- vm/sq.h (revision 1742) +++ vm/sq.h (working copy) @@ -284,10 +284,11 @@ int windowIndex; /* host window structure */ } sqDragDropFilesEvent; -#define DragEnter 1 /* drag operation from OS entered Squeak window */ +#define DragEnter 1 /* drag operation from OS entered Squeak window */ #define DragMove 2 /* drag operation from OS moved within Squeak window */ -#define DragLeave 3 /* drag operation from OS left Squeak window */ -#define DragDrop 4 /* drag operation dropped contents onto Squeak. */ +#define DragLeave 3 /* drag operation from OS left Squeak window */ +#define DragDrop 4 /* drag operation dropped contents onto Squeak. */ +#define DragRequest 5 /* data request from other app. */ /* menu event */ typedef struct sqMenuEvent

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Vm-dev April 2008