[Gate-users] segfault ITK multithreader

[Clemens S.]

Dear Simon,

thank you very much for your help! I recompiled ITK
with ITK_USE_THREADPOOL=ON and it seems to run stable now.

While compiling, I tried out the
export ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS=1
method. I haven't done serious benchmarks, but the simulations seem to
finish much faster with that setting than with the threadpool. Could there
be a lot of overhead with multithread and FFD?

Anyway, thank you again for your help!

Kind regards
Clemens

2017-09-29 13:22 GMT+02:00 Simon Rit <simon.rit at creatis.insa-lyon.fr>:

> Hi,
> I'm not sure but I had similar issues at some point. I first fixed
> something in ITK:
> http://review.source.kitware.com/#/c/21937
> Then the problem was a bit more explicit, it could not create enough
> threads. I never explained it in my case (see:
> https://public.kitware.com/pipermail/insight-users/2017-
> January/054167.html) but turning on ITK_USE_THREADPOOL at compilation of
> ITK fixed the problem. Can you turn on ITK_USE_THREADOOL with the latest
> ITK to see if that solves your issue?
> Note that you can always turn off multithreading using the env variable:
> export ITK_GLOBAL_DEFAULT_NUMBER_OF_THREADS=1
> Hope this helps,
> Simon
>
> On Fri, Sep 29, 2017 at 12:14 PM, Clemens S. <clem.schmid at gmail.com>
> wrote:
>
>> Dear fellow GATE users,
>>
>> I have a problem with running multiple parallel GATE simulations. After a
>> while (around 10 minutes), simulations start segfaulting (stacktrace
>> attached). This does not happen every or at the same time; sometimes all
>> simulations finish correctly. It also happens if I don"t start as many
>> simulations, but I feel not as frequently.
>>
>> I use the FixedForcedDetection Actor and start around 32 simulations at
>> once on a 64 thread system. The simulation is attached.
>>
>> AFAIK, I did not enable multithread mode on any GATE-related program by
>> hand when installing them.
>>
>> I am using
>>  - GATE 7.2
>>  - root 5.34/30
>>  - simpleITK 4.10.1
>>  - RTK 1.3.0
>>
>> Thank you for your help!
>>
>> Kind regards
>> Clemens Schmid
>>
>> _______________________________________________
>> Gate-users mailing list
>> Gate-users at lists.opengatecollaboration.org
>> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
>>
>
>
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