Re: [OMPI users] libnuma.so error
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 " 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 on behalf of Luis
>> Cebamanos via users
>> *Sent:* Wednesday, July 19, 2023 10:09 AM
>> *To:* users@lists.open-mpi.org
>> *Cc:* Luis Cebamanos
>> *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
>>
>
>
Re: [OMPI users] libnuma.so error
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 " 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
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 on behalf of Luis
Cebamanos via users
*Sent:* Wednesday, July 19, 2023 10:09 AM
*To:* users@lists.open-mpi.org
*Cc:* Luis Cebamanos
*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
Re: [OMPI users] libnuma.so error
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 " 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 on behalf of Luis
> Cebamanos via users
> *Sent:* Wednesday, July 19, 2023 10:09 AM
> *To:* users@lists.open-mpi.org
> *Cc:* Luis Cebamanos
> *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
>
Re: [OMPI users] libnuma.so error
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 on behalf of Luis Cebamanos via users Sent: Wednesday, July 19, 2023 10:09 AM To: users@lists.open-mpi.org Cc: Luis Cebamanos 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
Re: [OMPI users] libnuma.so error
Luis, That can happen if a component is linked with libnuma.so: Open MPI will fail to open it and try to fallback on an other one. You can run ldd on the mca_*.so components in the /.../lib/openmpi directory to figure out which is using libnuma.so and assess if it is needed or not. Cheers, Gilles On Wed, Jul 19, 2023 at 11:36 PM Luis Cebamanos via users < users@lists.open-mpi.org> wrote: > 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 >
[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
