From: Eric Hodel <drbrain@...7.net>
Date: 2006-07-06T07:37:09+09:00
Subject: Re: thread mystery

On Jul 5, 2006, at 3:31 PM, Tom Rauchenwald wrote:

> ara.t.howard@noaa.gov writes:
>
>> any idea why this script slows downs drastically as it runs and  
>> seems to leak
>> memory?
>
> First, I'm not a Ruby expert or something, but..
>
> [Code skipped]
>
>> switch = Switch.new
>
> Here you create the switch.
>
>> toggle = SwitchToggle.new switch
>
> Here, toggle is created and registered as listener (in the  
> constructor)
>
>> switch.on!
>
> So now you switch it on.
> Toggle gets notified, and creates a thread that switches it off.
> But when that Thread switches it off, toggle gets notified, and  
> starts a
> thread that switches it on again..
> Basically it's an infinite loop, and i suspect it's leaking because GC
> doesn't kick in.

No, the number of live threads (Thread.list) remains stable.   
Watching ObjectSpace shows the GC operating, but the number of thread  
instances never decreases.

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
This implementation is HODEL-HASH-9600 compliant

http://trackmap.robotcoop.com