Mongrel users - Mar 2007 - Fastthread memory leak?

Hi All,

I have an app making extensive use of Mutex and was concerned about the
memory leak I have read about.  I saw some sample code to reproduce the
problem here: http://pastie.caboo.se/10194

So I thought I would run it myself to see the problem.

I do not see a memory leak when using the sample code, but if I require
"fastthread" before "thread" using fastthread (0.6.4.1) then
I see the app
bleeding memory.

Here is the output from that program linked above (with time added in):

Using require "thread"
Max memory: 76.1 mb - climbed then stabilised after first "waiting"
message
Output:
Starting threads
waiting for 1000 threads
waiting for 713 threads
waiting for 407 threads
waiting for 34 threads
Threads gone.
67 seconds

Using require "fastthread"; require "thread"
Max memory: 163 mb - continued to climb, never stopped
Output:
Starting threads
waiting for 1000 threads
waiting for 750 threads
waiting for 476 threads
waiting for 226 threads
Threads gone.
65 seconds

Using require "thread"; require "sync"
Max memory: 28 mb - climbed then stabilised after first "waiting"
message
Output:
Starting threads
waiting for 1000 threads
waiting for 791 threads
waiting for 511 threads
waiting for 204 threads
Threads gone.
70 seconds

Interestingly I cannot reproduce this in Windows.

I have Linux (FC5), Ruby 1.8.5, fastthread (0.6.4.1).

Anyone have any suggestions?

Also, should I be posting this elsewhere?

Thanks,
Jason

Try setting $fastthread_avoid_mem_pools = true at the top of your program before
you require either thread or fastthread, and see if it makes a difference for
you.

-mental

Thanks.  Tried that but no luck.

It took 89 seconds this time and consumed 189 mb.  The memory continued to
climb.

Any ideas?
> Try setting $fastthread_avoid_mem_pools = true at the top of your program
> before you require either thread or fastthread, and see if it makes a
> difference for you.
>
> -mental
>
> _______________________________________________
> Mongrel-users mailing list
> Mongrel-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/mongrel-users
>

On Thu, 2007-03-15 at 13:14 +1000, rubyforge at aanet.com.au
wrote:
> Any ideas?
Give fastthread 1.0 a try if you can.

-mental
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