[Omp] A problem with guard objects and exceptions on Intel

[Michael Suess]

Dieter,

I tried:

$ulimit -s 4000
$ulimit -s 8000
$ulimit -s 16000
$ulimit -s 32000
$ulimit -s unlimited

Nothing made any difference (and I still do not understand why it should - I 
am hardly putting anything on the stacks at all).

Thanks, Michael


> Micheal,
>
> try something in between small and unlimited.
> I had such a case as well.
>
> Dieter
>
> Michael Suess schrieb:
> > On Wednesday 23 August 2006 01:38, Micah Elliott wrote:
> >> On 2006-08-22 Michael Suess wrote:
> >>> I have just published a blog entry comparing the merits of
> >>> guard objects vs. the critical construct (with C++ and OpenMP).
> >>> The problem I have now is: My test programs with exceptions and
> >>> guard objects do not work for the Intel Compiler. Since this
> >>> would not be the first time I missed something, I figured I
> >>> would double check here before filing a bug with Intel.
> >>>
> >>> So if you find the time, please take a look at the code for the
> >>> guard object, enclosed in the following article:
> >>> http://www.thinkingparallel.com/2006/08/21/scoped-locking-vs-critical-i
> >>>n- openmp-a-personal-shootout/
> >>
> >> I didn't take much time in looking at the code, but I did compile
> >> what I found on the site with icpc, and saw that you'll get the
> >> SEGV if you don't increase your stack limit (e.g., "ulimit -s
> >> unlimited" in bash).
> >
> > Hi Micah,
> >
> > your advice does not seem to help:
> >
> > $ ulimit -s unlimited
> >
> > $ ulimit -s
> > unlimited
> >
> > $ icpc test_omp_guard_exceptions.cpp -o test_omp_guard_exceptions
> > omp_guard.cpp -openmp
> > test_omp_guard_exceptions.cpp(18) : (col. 2) remark: OpenMP DEFINED
> > REGION WAS PARALLELIZED.
> >
> > $ ./test_omp_guard_exceptions
> > Segmentation fault
> >
> > I am curious, though: Why do you think the stack size is too small? I am
> > not using much stack space in my program, as far as I can see...
> >
> > Thanks anyways,
> > Michael

-- 
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Michael Suess
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