MP: Error #13: Assertion failure at kmp_csupport.cpp(710).

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1

MP: Error #13: Assertion failure at kmp_csupport.cpp(710).
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Thread 22 “openmp_worker” received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffb9ada880 (LWP 262991)]
0x00007fffecc1f122 in __kmp_tid_from_gtid (gtid=3) at ../../src/kmp.h:3824
3824    ../../src/kmp.h: No such file or directory.
(gdb) bt
#0  0x00007fffecc1f122 in __kmp_tid_from_gtid (gtid=3) at ../../src/kmp.h:3824
#1  __kmp_invoke_task_func (gtid=3) at ../../src/kmp_runtime.cpp:8368
#2  0x0000555556c912ee in __kmp_launch_thread ()
#3  0x0000555556cd6d81 in __kmp_launch_worker(void*) ()
#4  0x00007ffff78a4609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#5  0x00007ffff5c2d353 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Running on Ubuntu 20.04, built SuiteSparse using the MKL library, we are using Cholmod linked to Mkl Lapack/BLAS via mkl_intel_lp64 and mkl_intel_thread.

Do you maybe have suggestions how to debug this to find the problem?

Running the same code on ubuntu 25.10 using the same Mkl does not give this problems. ( Not exactly the same SuiteSparse, but I can try that)

2

Could you run with MKL_VERBOSE=1 on Ubuntu 25.10 and share the related output for the MKL call that caused the failure on Ubuntu 20.04?

3

Sorry for the late reply, but your reply got stuck in my junk folder.

I allready figured out the problem, it was related to the mkl_intel_lp64 vs mkl_intel_ilp64 versions issue.

I setup the linkage using ilp64, where i should have been using lp64, which caused these crashes.

Thank you for your follow up, sorry for the issue report that was in the end no issue