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Re: OpenMP - segfault if parallel do loop upper limit too high
- From: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
- To: fortran at gcc dot gnu dot org
- Date: Mon, 4 Apr 2011 09:29:02 -0700
- Subject: Re: OpenMP - segfault if parallel do loop upper limit too high
- References: <20110404161025.GB91435@mech-cluster241.men.bris.ac.uk>
On Mon, Apr 04, 2011 at 05:10:25PM +0100, mexas@bristol.ac.uk wrote:
> I've this OMP fortran program, which I adapted from
> https://computing.llnl.gov/tutorials/openMP/index.html#DO
(code elided)
> I build and run it as (dual CPU FreeBSD ia64 9.0-current):
>
> TZAV gfortran45 -o try2.sx try2.f90 -static -fopenmp
You should probably remove -static. ISTR an issue with
-static and openmp, but cannot remember the details.
> TZAV ./try2.sx
> HELLO FROM THREAD 0
> NUMBER OF THREADS 2
> HELLO FROM THREAD 1
> 300000.00
> TZAV
>
> However, if I increase N to N=1000000, I get segfault:
>
> TZAV ./try2.sx
> Segmentation fault (core dumped)
troutmask:kargl[201] limits
Resource limits (current):
cputime infinity secs
filesize infinity kB
datasize 8388608 kB
stacksize 1048576 kB
What is your stacksize limit set to?
--
Steve