[mpich-discuss] UCX run-time warnings

Wed Nov 27 14:59:45 CST 2019

I have also opened a PR on spack to add a dependency on ucx for MPICH. 
Otherwise an embedded version is used, which *should* work but is not 
the preferred configuration.

   https://github.com/spack/spack/pull/13921

Ken

On 11/27/19 2:08 PM, Raffenetti, Kenneth J. via discuss wrote:
> Those warning messages are not coming from MPICH. Can you run ldd one of
> the benchmark binaries and confirm all the expected libraries are linked
> to it? Are you perhaps also linked against an hcoll library?
> 
> Ken
> 
> On 11/27/19 12:58 PM, Sajid Ali wrote:
>> Hi Kenneth,
>>
>> Running the same test with mpich at develop, I still see the following
>> errors in a typical outfile :
>>
>> |[sas4990 at quser10 mdb6i63]$ cat lat_10
>> ---------------------------------------- ...
>> ---------------------------------------- slurmstepd: error: mpi/pmi2: no
>> value for key in req slurmstepd: error: mpi/pmi2: no value for key in
>> req slurmstepd: error: mpi/pmi2: no value for key in req
>> [1574880837.368994] [qnode5038:4743 :0] ucp_context.c:1131 UCX WARN UCP
>> version is incompatible, required: 1.5, actual: 1.4 (release 0)
>> slurmstepd: error: mpi/pmi2: no value for key in req slurmstepd: error:
>> mpi/pmi2: no value for key in req [1574880837.377860] [qnode5039:4546
>> :0] ucp_context.c:1131 UCX WARN UCP version is incompatible, required:
>> 1.5, actual: 1.4 (release 0) slurmstepd: error: mpi/pmi2: no value for
>> key in req slurmstepd: error: mpi/pmi2: no value for key in req
>> slurmstepd: error: mpi/pmi2: no value for key in req slurmstepd: error:
>> mpi/pmi2: no value for key in req slurmstepd: error: mpi/pmi2: no value
>> for key in req # OSU MPI_Get latency Test v5.6.1 # Window creation:
>> MPI_Win_allocate # Synchronization: MPI_Win_flush # Size Latency (us) 1
>> 2.13 .... |
>>
>>
>> Since UCX is a vendored dependency of MPICH, why is MPICH complaining
>> about an incompatible UCX version ?
>>
>>
>> Thank You,
>> Sajid Ali | PhD Candidate
>> Applied Physics
>> Northwestern University
>> s-sajid-ali.github.io <http://s-sajid-ali.github.io>
>>
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