[Omp] segmentation fault with private variable

[Dieter an Mey]

You probably need to increase the stacksize for the master thread 
(ulimit -s ...) and also for the slave threads, which is platform-dependent.
Check the compiler docu.

best regards
Dieter

Julien Taillard schrieb:
> Dear all,
> 
> I have a segmentation fault when I execute this code with more than 1
> thread with xlf_90 compiler.
> Is there any restriction in data size for private variable in OpenMP or
> have you got any idea of the problem ?
> 
> If I remove m2Inst,  it works fine...
> 
> PROGRAM testInitTab
> 
>         INTEGER :: p0
>         INTEGER  :: OMP_GET_THREAD_NUM
>         INTEGER , DIMENSION(0:999 , 0:999) :: matrix1Inst
>         INTEGER , DIMENSION(0:999 , 0:999) :: matrix2Inst
>         INTEGER , DIMENSION(0:999 , 0:999) :: Cinst
> 
>         INTEGER , DIMENSION(0:499 , 0:999) :: inAInst
>         INTEGER, DIMENSION(0:999,0:499) :: inBInst
>         INTEGER, DIMENSION(0:499,0:499) :: m2Inst
> 
>         !$OMP PARALLEL PRIVATE(p0,inAInst,inBInst,m2Inst)
> SHARED(matrix1Inst ,matrix2Inst ,Cinst)
> 
>         p0=OMP_GET_THREAD_NUM()
> 
>         PRINT *, "Hello from ",p0
> 
>         !$OMP BARRIER
> 
>         inAInst = 0
>         inBInst = 0
>         m2Inst =0
> 
>         !$OMP END PARALLEL
> END PROGRAM testInitTab
> 
> 
> 
> Best regards,
> Julien
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> Omp mailing list
> Omp at openmp.org
> http://openmp.org/mailman/listinfo/omp
> 

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Dieter an Mey
High Performance Computing               Hochleistungsrechnen
RWTH Aachen University                   Rechen- und Kommunikations-
Center for Computing and Communication   zentrum der RWTH Aachen
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fax:   ++49-(0)241-80-22134              52074 Aachen, Germany
email: anmey at rz.rwth-aachen.de
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