[Pharo-project] Delay bug

Gary Chambers gazzaguru2 at btinternet.com
Mon Apr 11 11:28:21 CEST 2011

Issue http://code.google.com/p/pharo/issues/detail?id=3986

Regards, Gary

----- Original Message ----- 
From: "Adrian Lienhard" <adi at netstyle.ch>
To: <Pharo-project at lists.gforge.inria.fr>
Sent: Wednesday, April 06, 2011 5:41 PM
Subject: Re: [Pharo-project] Delay bug

We managed to resolve our initial problem with the process scheduling [1]. 
All Cmsbox customers have been migrated to Pharo and it works very reliably 

Gary, maybe you could open a ticket already now and post what you know at 
this time to get early feedback.

[1] http://code.google.com/p/pharo/issues/detail?id=3498


On Apr 6, 2011, at 18:24 , Stéphane Ducasse wrote:

> thanks gary.
> Yes adrian got a problem on his server after two weeks of load. I do not 
> know how we can improve them.
> Stef
> On Apr 6, 2011, at 6:02 PM, Gary Chambers wrote:
>> Well, we have been having problems with applications appearing to hang 
>> every 6 days or so (sound familiar?).
>> I have identified a bug in the Delay implementation, rather obscure, but 
>> highlighted by our applications that make HEAVY use of processes/(tight, 
>> a few tens of milliseconds)delays/semaphores etc.
>> Naturally due to an edge case on millisecond clock rollover...
>> Affects all Squeak/Pharo versions, as far as I can tell. (It is separate 
>> from the OSProcess issues I have posted about a few weeks ago).
>> I've developed a potential fix, though I'll have to let you all know 
>> whether (hopefully) successful in a week or two... fingers crossed!
>> I hope it is fixable, last hurdle for business applications, from our 
>> point of view.
>> I'll post details when fix confirmed or failed then.
>> Regards, Gary

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