Help with flexiblas crash on aarch64 in kojij only

[Orion Poplawski <orion@xxxxxxxx>]

Since the latest update to OpenBLAS 0.3.28 in rawhide, FlexiBLAS fails 
to build in aarch64 because OpenBLAS crashes in the 
LAPACK-xeigtstc_cec_in test. Note that OpenBLAS itself does not fail 
only because they don't include LAPACK test suite.

See:
- The first failure in Koschei after the 0.3.28 update: 
https://koschei.fedoraproject.org/package/flexiblas
- The build log: 
https://koji.fedoraproject.org/koji/taskinfo?taskID=125998498

FTBFS report here: https://bugzilla.redhat.com/show_bug.cgi?id=2329491

I have attempted to collect some more debug info via the following - 
https://src.fedoraproject.org/fork/orion/rpms/flexiblas/tree/debug

But the valgrind run just seems to hang with no output from valgrind - 
https://kojipkgs.fedoraproject.org//work/tasks/3875/127513875/build.log

 Tests of the Nonsymmetric eigenproblem condition estimation routines
 CTRSYL, CTREXC, CTRSNA, CTRSEN
 Relative machine precision (EPS) =     0.119209E-06
 Safe minimum (SFMIN)             =     0.117549E-37
 Routines pass computational tests if test ratio is less than   20.00
 CEC routines passed the tests of the error exits ( 41 tests done)

And the crash seems to occur after memory corruption has already 
occurred so seems to be of limited utility.  So I'm at a loss myself.

It appears to build fine in COPR and on the Fedora dev test machine 
aarch64-test01.fedorainfracloud.org so we seem to be stuck with the 
limited access koji builders.  I guess this points to possible 
architectural differences, but cpuinfo doesn't show anything:

aarch-test01:
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

koji:
Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp 
asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer	: 0x41
CPU architecture: 8
CPU variant	: 0x3
CPU part	: 0xd0c
CPU revision	: 1

Koji does have 12 cores as opposed to 2, so it might be due to how 
openblas splits up tasks among the cores - but not sure why it's only 
showing up on aarch64 unless 12 cores is a magic number.

Any other suggestions?

--
Orion Poplawski
he/him/his  - surely the least important thing about me
IT Systems Manager                         720-772-5637
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       orion@xxxxxxxx
Boulder, CO 80301                 https://www.nwra.com/

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