topic Re: ifx and mpi_init using -check all in Intel® MPI Library

ifx and mpi_init using -check all

Jaapw — Thu, 26 Jun 2025 11:11:37 GMT

I would like to try the ifx compiler since we like good performance. If I compile a small test program which looks as follows:

program hello
use mpi_f08
implicit none
integer :: ierr
call MPI_Init(ierr)
print *, 'MPI_Init ierr=',ierr
call MPI_Finalize(ierr)
print *, 'MPI_Finalize ierr=',ierr
end program hello

using

mpif90 test.F90 -o test

I get:

MPI_Init ierr= 0
MPI_Finalize ierr= 0

which looks as expected.

However if I use the -check all flag the executable stops at the MPI_init call :

Uninitialized bytes in strcmp at offset 0 inside [0x712000000d8a, 2)
==1016011==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x7fffece5209c (/lib64/libucp.so.0+0x2309c) (BuildId: f062d71c65c8053ad6f696e66d11227ab55fb9d9)
#1 0x7fffece52e76 (/lib64/libucp.so.0+0x23e76) (BuildId: f062d71c65c8053ad6f696e66d11227ab55fb9d9)
#2 0x7fffece5910c in ucp_init_version (/lib64/libucp.so.0+0x2a10c) (BuildId: f062d71c65c8053ad6f696e66d11227ab55fb9d9)
#3 0x7fffea2d917b in mlx_domain_open (/cm/shared/apps/oneapi/2024.2.1/mpi/2021.13/opt/mpi/libfabric/lib/prov/libmlx-fi.so+0xb17b) (BuildId: 1dd5a82efea27007226e0e98f8c29bbb99bc0506)

How can I use the check all flag in combination with mpi? The flag is very helpful to avoid errors in the code so I would like to use it.

I am using the OneAPI HPC 2024.2.1 package.

Re: ifx and mpi_init using -check all

TobiasK — Wed, 02 Jul 2025 13:39:12 GMT

@Jaapw you are hitting an IFX issue:
https://community.intel.com/t5/Intel-Fortran-Compiler/IFX-issue-when-building-check-all-or-check-uninit/m-p/1545825

please use oneAPI 2025.2 / Intel MPI 2021.16 and try again.

Re: ifx and mpi_init using -check all

JW20 — Thu, 17 Jul 2025 10:00:25 GMT

Thank you for the advice. It indeed works, the hello world test works in debug mode. Nice!

If I run valgrind I get the message below. Is this something to worry about? I do not specify FI_PROVIDER but with mlx or psm3 I do get message too.

==1591512== Memcheck, a memory error detector
==1591512== Copyright (C) 2002-2024, and GNU GPL'd, by Julian Seward et al.
==1591512== Using Valgrind-3.24.0 and LibVEX; rerun with -h for copyright info
==1591512== Command: ./test
==1591512==
==1591512== WARNING: valgrind ignores shmget(shmflg) SHM_HUGETLB
==1591512== Conditional jump or move depends on uninitialised value(s)
==1591512== at 0xFDC7BF5: ??? (in /usr/lib64/libibverbs.so.1.14.47.0)
==1591512== by 0xFDCBF08: ibv_cmd_create_srq (in /usr/lib64/libibverbs.so.1.14.47.0)
==1591512== by 0x1146CCD9: ??? (in /usr/lib64/libmlx5.so.1.24.47.0)
==1591512== by 0xFDD399A: ibv_create_srq (in /usr/lib64/libibverbs.so.1.14.47.0)
==1591512== by 0x118B5DA9: uct_rc_iface_init_rx (in /usr/lib64/ucx/libuct_ib.so.0.0.0)
==1591512== by 0x118B9039: uct_rc_iface_t_init (in /usr/lib64/ucx/libuct_ib.so.0.0.0)
==1591512== by 0x118B9F3F: ??? (in /usr/lib64/ucx/libuct_ib.so.0.0.0)
==1591512== by 0x118BA3DD: ??? (in /usr/lib64/ucx/libuct_ib.so.0.0.0)
==1591512== by 0x1121886D: uct_iface_open (in /usr/lib64/libuct.so.0.0.0)
==1591512== by 0x11176033: ucp_worker_iface_open (in /usr/lib64/libucp.so.0.0.0)
==1591512== by 0x1117EC85: ucp_worker_create (in /usr/lib64/libucp.so.0.0.0)
==1591512== by 0x10EEBC11: mlx_ep_open (in /cm/shared/apps/oneapi-2025.2/mpi/2021.16/opt/mpi/libfabric/lib/prov/libmlx-fi.so)
==1591512==
==1591512== Warning: set address range perms: large range [0x2f0000000000, 0x2f0083000000) (defined)