Squeak-dev June 2006

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250 discussions

WinXP users?
by Günther Schmidt 05 Jun '06

05 Jun '06

Hi all, are there any other WinXP users out there who have trouble using SqueakMap on a virgin 3.8 image? I have massive problems here, CPU going up to 100% and so on. I *believe* that is caused by a primitive failure where the ST code is executed, which would explain a lot. That would also mean that the current VM for XP is buggy. Could anybody verify this? Günther

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Re: VM crash
by Bert Freudenberg 05 Jun '06

05 Jun '06

Am 04.06.2006 um 23:42 schrieb Jecel Assumpcao Jr: > Bob Cowdery wrote on Sun, 4 Jun 2006 13:12:12 +0100 > >> memcpy((void *)results, a, 4096*sizeof(float)); > > I haven't looked into interfacing with the VM at all and so am > probably > saying something really stupid, but I would think that results[0] > would > hold the object's header and overwritting it would cause really bad > things to happen. That's what I suspected, too. So, you have to convert between Oops and C pointers, for example using #arrayValueOf: if you know your Oop is an array, or #firstIndexableField: for the general case. Also, be sure to look at the generated C code, and attach it for reference. Besides, this question would be well-suited for the vm list. Third, Bob, since nobody seems to have told you yet, it would be nice if you would send plain-text messages. I don't like having to crank up the font size for every of your messages. And your Confidentiality Notice is sort of nonsensical when posting to a public mailing list. Thanks. - Bert -

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RE: Using SqueakMap on a fresh 3.8 Image for the first time -> CPU 100% for an hour
by Peter Crowther 05 Jun '06

05 Jun '06

> From: Günther Schmidt > I think my XP is screwed up, cause it keeps making CHKDSK on > every 3rd boot or so. http://www.ariolic.com/activesmart/?StartMenu and download the free trial. It's found several failing HDDs for me, both on my own machines and on client sites. - Peter

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Re: VM crash
by Klaus D. Witzel 05 Jun '06

05 Jun '06

A good place to borrow from is FloatArrayPlugin>>#primitiveAt /Klaus On Sun, 04 Jun 2006 23:42:06 +0200, Jecel Assumpcao Jr <jecel(a)merlintec.com> wrote: > Bob Cowdery wrote on Sun, 4 Jun 2006 13:12:12 +0100 > >> memcpy((void *)results, a, 4096*sizeof(float)); > > I haven't looked into interfacing with the VM at all and so am probably > saying something really stupid, but I would think that results[0] would > hold the object's header and overwritting it would cause really bad > things to happen. > > -- Jecel > >

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VM crash
by Bob.Cowdery＠CGI-Europe.com 04 Jun '06

04 Jun '06

Hi all, I do hope someone can help me out here because it's a real stopper for my app. I was getting sporadic VM crashes when calling my plugin, which I have now got down to a very small subset of code to reproduce the problem. The crash dump never has a stack trace and sometimes it fails so bad no dump is produced. Essentially what I have is a 'C' method that returns and array of 4096 float values. I have taken away all the application C code and simply load and return an array, so I am quite sure it's not the C code that's breaking but somewhere in the C/Squeak interface. Here is what I have (stripped to minimum for clarity). For testing I am running this flat out in a loop. If I run 100,000 iterations I will usually but not always get a crash. Is there anything I can do to isolate this a bit further? Thanks in advance for any help. Bob The C code: ----------- void process_test(float *results) { float a[4096]; int i; float f = 0.0; for(i=0;i<4096;i++){ a[i] = f; f = f + 1.0; } memcpy((void *)results, a, 4096*sizeof(float)); } The plugin code which is translated and compiled with the C code: ---------------- test: data self export: true. self primitive: 'test' parameters:#(FloatArray). (self cCode: 'process_test(data)'). ^data. The calling code: ----------------- primTest: data <primitive: 'test' module:'SDRDttSpDSPPlugin'> Transcript show: 'Primitive Test failed'. ^ false Finally, the method I call: ------------------ test |data| data := FloatArray new: 4096. self primTest: data. ^ data. *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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RE: VM crash
by Bob.Cowdery＠CGI-Europe.com 04 Jun '06

04 Jun '06

Hi Tom On 6/4/06, Bob.Cowdery(a)cgi-europe.com <Bob.Cowdery(a)cgi-europe.com> wrote: > I can now crash my VM in about 10 seconds, guaranteed. >> Cool! You must be close to finding the problem. I wish - my gut feeling is it's in the VM guts where I'm as useful as a chocolate fireguard. > Maybe there are re-entrancy problems somewhere and what I am > doing is not valid. >> It's probably something like that. Is the returned array correct? That >> is, does it have the proper floating point values in it? If not, maybe >> you're not storing the data where it's supposed to go. That would do >> it. Don't know if you followed the previous posts. All the values I get back are valid, even when running multiple threads. It fails with just one thread but takes a long time. I kicked it hard to see what would happen, and it falls apart fast. What I don't know yet is if it an XP VM problem or all VM's. This could kill my project I've worked 6 months on. Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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RE: VM crash
by Cowdery, Bob [UK] 04 Jun '06

04 Jun '06

On Sun, Jun 04, 2006 at 01:12:12PM +0100, Bob.Cowdery(a)CGI-Europe.com wrote: > Hi all, > > I do hope someone can help me out here because it's a real stopper for my > app. I was getting sporadic VM crashes when calling my plugin, which I have > now got down to a very small subset of code to reproduce the problem. The > crash dump never has a stack trace and sometimes it fails so bad no dump is > produced. Essentially what I have is a 'C' method that returns and array of > 4096 float values. I have taken away all the application C code and simply > load and return an array, so I am quite sure it's not the C code that's > breaking but somewhere in the C/Squeak interface. Here is what I have > (stripped to minimum for clarity). For testing I am running this flat out in > a loop. If I run 100,000 iterations I will usually but not always get a > crash. Is there anything I can do to isolate this a bit further? > > Thanks in advance for any help. >> I tried building your test plugin code on my Linux system, and it >> works just fine. The test method returns the expected array of floats >> from 0.0 through 4095.0. I ran this test method 1,000,000 times with >> no errors, and ran it again still with no errors (2 million iterations >> total). >> I'd be quite surprised if there was any difference between the >> windows and unix VMs in this case, but I guess nothing is impossible. >> I'm attaching the actual code that I ran for your reference. You >> might want to try building this exact code on your system just as >> a double-check to be sure there is not something else going on in >> your plugin that somehow affects this test. Dave Thanks very much for taking the time to do that. I built what you sent back into a separate plugin and ran it with your code. I set it going on two machines. My desktop is still running at 605,000 odd but my laptop crashed after 108,843 with this dump. I don't really know what to think at the moment. I guess I need somehow to get a debugger going. This could be a long haul. My other plugin is still loaded but wasn't active. The machine that's still running doesn't have it loaded. I will try with it active though heaven knows why an inactive dll should make a difference. Bob --------------------------------------------------------------------- Sun Jun 04 19:21:53 2006 Exception code: C0000005 Exception addr: 00419EED Access violation (read access) at 21F41A44 EAX:21F41A44 EBX:80000002 ECX:00000001 EDX:00000000 ESI:11EF59C4 EDI:11EF580C EBP:11EA60D0 ESP:0006FBA8 EIP:00419EED EFL:00210246 FP Control: FFFF037F FP Status: FFFF4020 FP Tag: FFFFFFFF VM Version: Squeak 3.7.1 (release) from Sep 23 2004 Compiler: gcc 2.95.2 19991024 (release) Current byte code: 217 Primitive index: 0 Loaded plugins: ZipPlugin 23 September 2004 (i) TestForBob 4 June 2006 (e) SoundGenerationPlugin 23 September 2004 (i) SoundPlugin 23 September 2004 (i) SDRDttSpDSPPlugin 4 June 2006 (e) DirectTransportPlugin 7 December 2004 (e) JPEGReadWriter2Plugin 23 September 2004 (i) LargeIntegers v1.3 23 September 2004 (i) SocketPlugin 23 September 2004 (i) Matrix2x3Plugin 23 September 2004 (i) FloatArrayPlugin 23 September 2004 (i) B2DPlugin 23 September 2004 (i) BitBltPlugin 23 September 2004 (i) SecurityPlugin 23 September 2004 (i) FilePlugin 23 September 2004 (i) MiscPrimitivePlugin 23 September 2004 (i) Stack dump: 300915876 [] in Delay>schedule 300916060 [] in Semaphore>critical: 300916244 BlockContext>ensure: 300915968 Semaphore>critical: 300915784 Delay>schedule 300915508 Delay>wait 300915600 [] in EventSensor>eventTickler 300915416 BlockContext>on:do: 299589928 EventSensor>eventTickler 299589652 [] in EventSensor>installEventTickler 299589836 [] in BlockContext>newProcess *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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RE: WinXP users?
by Bob.Cowdery＠CGI-Europe.com 04 Jun '06

04 Jun '06

3.8-6665 Bob >> which VM are you using? Günther Cowdery, Bob [UK] schrieb: > >> are there any other WinXP users out there who have trouble using >> SqueakMap on a virgin 3.8 image? > >> I have massive problems here, CPU going up to 100% and so on. > >> I *believe* that is caused by a primitive failure where the ST code is >> executed, which would explain a lot. > >> That would also mean that the current VM for XP is buggy. > >> Could anybody verify this? > > Günther > > I run XP here and have on occasions had trouble, but deleting the sm directory and downloading again always fixed it. As for stability it seems fine for my usage pattern. > > Bob > > > *** Confidentiality Notice *** Proprietary/Confidential > Information belonging to CGI Group Inc. and its affiliates > may be contained in this message. If you are not a recipient > indicated or intended in this message (or responsible for > delivery of this message to such person), or you think for > any reason that this message may have been addressed to you > in error, you may not use or copy or deliver this message > to anyone else. In such case, you should destroy this > message and are asked to notify the sender by reply email. > > *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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3.9a unprintable characters in some methods?
by Ron Teitelbaum 04 Jun '06

04 Jun '06

Hello all, Sorry about the screen clipping but I thought I'd better show you what I'm seeing. I was wondering why some methods now in 3.9a have an unprintable character down the left column. This doesn't appear in all methods just some. Do they have some significance that I'm missing? Is this a bug? Thanks, Ron Teitelbaum

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RE: WinXP users?
by Cowdery, Bob [UK] 04 Jun '06

04 Jun '06

> are there any other WinXP users out there who have trouble using > SqueakMap on a virgin 3.8 image? > I have massive problems here, CPU going up to 100% and so on. > I *believe* that is caused by a primitive failure where the ST code is > executed, which would explain a lot. > That would also mean that the current VM for XP is buggy. > Could anybody verify this? Günther I run XP here and have on occasions had trouble, but deleting the sm directory and downloading again always fixed it. As for stability it seems fine for my usage pattern. Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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