Intel® oneAPI Math Kernel Library
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Puzzling (but maybe elementary!) problem calling SCALAPACK PZGETF2 routine


Dear All,

            I have a somewhat strange runtime problem when calling the SCALAPACK PZGETF2 routine.

I have constructed a minimal code that reproduces the problem, which is attached below. The code compiles, and runs successfully for a single process, but fails for two processes

at runtime during the call to PZGETF2, but without returning (thus there is no INFO number etc.).

The error that is returned begins:

Assertion failed in file ../../src/util/intel/shm_heap/impi_shm_heap.c at line 877: offset < heap.shm_size
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f88105341d4]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fcbc031]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fffaf93]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fe3663d]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fd04487]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fd4abda]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fd31069]
/opt/intel/compilers_and_libraries_2020.0.166/linux/mpi/intel64/lib/release/ [0x7f880fd1cd8e]
Abort(1) on node 0: Internal error

I am running the code on Linux Mint and compile the code by:

mpiifort -o pz.exe pz_factorize.f90 -mkl=parallel -lmkl_scalapack_lp64 -lmkl_blacs_intelmpi_lp64 -liomp5 -lpthread -ldl

Selecting the values NPROW = NPCOL=1, MB = 10 the code will run using a single process , with execution by:
mpiexec.hydra   -n  1 ./pz.exe

Selecting instead the values NPROW=1 NPCOL=2, MB=5 the code will instead fail with the above error

if run using:

 mpiexec.hydra   -n  2 ./pz.exe


Can any of you knowledgeable fortran gurus see where I am going wrong ?!

 I am very grateful for any assistance,

                                Thanks, Dan.

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2 Replies

Tested the code with oneMKL 2021.2. Encountered error. Escalated!


The error was due to the shared memory transfer.

oneMKL and Intel MPI do not support Linux Mint.

oneMKL system requirements:

For C/C++ and Fortran


  • Amazon* Linux 2
  • CentOS* (latest version)
  • Clear Linux*
  • Debian* (latest version)
  • Wind River* Linux (latest version)
  • Yocto 2.7
  • Fedora* 31
  • openSUSE* 15
  • Redhat Enterprise Linux (RHEL)* 7, 8
  • SUSE Linux Enterprise Server* (SLES) 12, 15
  • Ubuntu* 18.04 LTS, 20.04 LTS


Intel MPI system requirements:

Software Requirements

(installation issues may occur with operating systems that are not released at the date of the current Intel MPI Library release)

  • Operating systems:
    • Red Hat* Enterprise Linux* 7, 8
    • Fedora* 31
    • CentOS* 7, 8
    • SUSE* Linux Enterprise Server* 12, 15
    • Ubuntu* LTS 16.04, 18.04, 20.04
    • Debian* 9, 10
    • Amazon Linux 2

There will be no more discussion about this issue.