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

[Barry Smith]

   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>