Hi Luis
That's awkward, because if the numa/libnuma packages were properly
installed,
the softlink should have been created.
Maybe check with "yum list |grep numa", then if something is missing use
"yum installl ...".
[Anyway, maybe the compute nodes use a different mechanism to pull their
system image, separate from yum/dnf/apt/]
Gus
On Thu, Jul 20, 2023 at 4:00 AM Luis Cebamanos via users <
users@lists.open-mpi.org> wrote:
> Hi Gus,
>
> Yeap, I can see softlink is missing on the compute nodes.
>
> Thanks!
> Luis
>
> On 19/07/2023 17:42, Gus Correa via users wrote:
>
> If it is installed, libunuma should be in:
> /usr/lib64/libnuma.so
> as a softlink to the actual number-versioned library.
> In general the loader is configured to search for shared libraries
> in /usr/lib64 ("ldd <your_executable>" may shed some light here).
>
> You can check if the numa packages are installed with:
> yum list | grep numa (CentOS 7, RHEL 7)
> dnf list | grep numa (CentOS 8, RHEL 8, RockyLinux 8, Fedora, etc)
> apt list | grep numa (Debian, Ubuntu)
>
> If not, you can install (or ask the system administrator to do it).
>
> I hope this helps,
> Gus Correa
>
>
> On Wed, Jul 19, 2023 at 11:55 AM Jeff Squyres (jsquyres) via users <
> users@lists.open-mpi.org> wrote:
>
>> It's not clear if that message is being emitted by Open MPI.
>>
>> It does say it's falling back to a different behavior if libnuma.so is
>> not found, so it appears if it's treating it as a warning, not an error.
>> ------------------------------
>> *From:* users <users-boun...@lists.open-mpi.org> on behalf of Luis
>> Cebamanos via users <users@lists.open-mpi.org>
>> *Sent:* Wednesday, July 19, 2023 10:09 AM
>> *To:* users@lists.open-mpi.org <users@lists.open-mpi.org>
>> *Cc:* Luis Cebamanos <luic...@gmail.com>
>> *Subject:* [OMPI users] libnuma.so error
>>
>> Hello,
>>
>> I was wondering if anyone has ever seen the following runtime error:
>>
>> mpirun -np 32 ./hello
>> .....
>> [LOG_CAT_SBGP] libnuma.so: cannot open shared object file: No such file
>> or directory
>> [LOG_CAT_SBGP] Failed to dlopen libnuma.so. Fallback to GROUP_BY_SOCKET
>> manual.
>> .....
>>
>> The funny thing is that the binary is executed despite the errors.
>> What could be causing it?
>>
>> Regards,
>> Lusi
>>
>
>
