[petsc-dev] Apparent bug with PGI on Titan with each thread calling a serial LU solve

[Mark Adams]

Barry, the test code works in OPT but in debug mode it gets this error.
Thanks,
Mark



On Wed, May 7, 2014 at 1:02 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>    Mark,
>
>    Are you sure the PGI version is built with the correct branch of
> barry/make-petscoptionsobject-nonglobal ?
>
>     In that branch line 516 of aoptions.c has         case OPTION_INT:
> not a PetscFree
>
>   Meanwhile in master line 516 has   ierr =
> PetscFree(PetscOptionsObject.title);CHKERRQ(ierr);
>
>
>   Barry
>
>
> On May 7, 2014, at 2:47 PM, Mark Adams <mfadams at lbl.gov> wrote:
>
> > Barry, made the LU solver "thread safe" in that each thread calls a
> serial solve, for Ed (cc'ed).
> >
> > Ed has a test code (attached) that can be run with 16 threads (aprun -n
> 1 -d 16) and NUM_OPENMP_THREADS=16.  This code seems to work with Intel
> compilers but fails with PGI.
> >
> > I've appended a stack trace.  Any ideas?
> >
> > Mark
> > Note, the line numbers are not quite right in tpetsc.F90 but the rest
> look OK.
> >
> > #11 tpetsc () at
> /autofs/na3_home1/adams/petsc/src/ksp/ksp/examples/tutorials/tpetsc.F90:144
> (at 0x0000000000422afa)
> > #10 matcreateseqaij_ () at
> /autofs/na3_home1/adams/petsc/src/mat/impls/aij/seq/ftn-custom/zaijf.c:14
> (at 0x0000000000474e95)
> > #9 MatCreateSeqAIJ () at
> /autofs/na3_home1/adams/petsc/src/mat/impls/aij/seq/aij.c:3574 (at
> 0x000000000053c8b1)
> > #8 MatSetType () at
> /autofs/na3_home1/adams/petsc/src/mat/interface/matreg.c:71 (at
> 0x000000000050b292)
> > #7 MatCreate_SeqAIJ () at
> /autofs/na3_home1/adams/petsc/src/mat/impls/aij/seq/aij.c:4129 (at
> 0x000000000053f24a)
> > #6 MatCreate_SeqAIJ_Inode () at
> /autofs/na3_home1/adams/petsc/src/mat/impls/aij/seq/inode2.c:99 (at
> 0x000000000058b205)
> > #5 PetscOptionsEnd_Private () at
> /autofs/na3_home1/adams/petsc/src/sys/objects/aoptions.c:516 (at
> 0x000000000043fc25)
> > #4 PetscFreeAlign () at
> /autofs/na3_home1/adams/petsc/src/sys/memory/mal.c:72 (at
> 0x0000000000483f89)
> > #3 free () from /dsl/lib64/libc-2.11.3.so (at 0x00002aaab5bcc4fc)
> > #2 malloc_printerr () from /dsl/lib64/libc-2.11.3.so (at
> 0x00002aaab5bc7558)
> > #1 __libc_message () from /dsl/lib64/libc-2.11.3.so (at
> 0x00002aaab5bc1e2f)
> > #0 abort () from /dsl/lib64/libc-2.11.3.so (at 0x00002aaab5b85fb0)
> >
> >
> >
> > <tpetsc.F90>
>
>
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