[squeak-dev] Re: UI lockup in Squeak 4.1
reefedjib at yahoo.com
Tue Jul 13 15:57:27 UTC 2010
From: "Andreas Raab" <andreas.raab at gmx.de>
Sent: Tuesday, July 13, 2010 11:29 AM
To: "The general-purpose Squeak developers list"
<squeak-dev at lists.squeakfoundation.org>
Subject: [squeak-dev] Re: UI lockup in Squeak 4.1
> On 7/13/2010 6:39 AM, Rob Withers wrote:
>> The low-space watcher is running, at least before the problem starts. I
>> do eventually run out of memory, but the uninterruptable state happens
>> before this.
> In which case you want to do the following:
> * Launch your app and wait until it's in the "growing state"
> * Hit F2 and from the VM's preference menu choose "Debug" and then "Print
> all processes"
> This will dump a list of all the call stacks of all processes. One of them
> is the culprit consuming memory and you'll probably be able to tell
> quickly from just looking at it (if not, you can email the output here but
> it typically takes a domain expert to understand what's going wrong).
Thanks for this pointer, Andreas.
This time it was a Cog VM which spasmed, which I use for my client (Squeak
4.1 for server for use with linux vm - I have no ability to compile a linux
Cog vm: would love if someone posted one that could be launched headless
for my webhost).
It started running at 100% and I did your F2 -> Debug Options -> Print all
processes. It started dumping a LOT to the Debug Console, then it froze,
still at 100%, but no increase in memory now and it went (Not Responding)
and greyed out the window.
Luckily, I was able to see enough of the stack that was causing problems.
It is infinitely looping in this method:
LanguageEnvironment class>>#localeID: localeID
^self knownEnvironments at: localeID ifAbsent: [self localeID: (LocaleID
This has nothing to do with my code, except I must be calling something that
enters this loop. It happens in both Cog (Windows) and Squeak4.1 (Linux
<headless> and Windows).
Not sure how to fix this.
> - Andreas
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