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Subject: Re: [OMPI users] MPI_Waitall hangs and querying
From: Brock Palen (brockp_at_[hidden])
Date: 2012-03-21 11:34:50


tcp with this code?

Can we disable the psm mtl and use the verbs emulation on qlogic? While the qlogic verbs isn't that great it is still much faster in my tests than tcp.

Is there a particular reason to pick tcp?

Brock Palen
www.umich.edu/~brockp
CAEN Advanced Computing
brockp_at_[hidden]
(734)936-1985

On Mar 21, 2012, at 11:22 AM, Jeffrey Squyres wrote:

> We unfortunately don't have much visibility into the PSM device (meaning: Open MPI is a thin shim on top of the underlying libpsm, which handles all the MPI point-to-point semantics itself). So we can't even ask you to run padb to look at the message queues, because we don't have access to them. :-\
>
> Can you try running with TCP and see if that also deadlocks? If it does, you can at least run padb to have a look at the message queues.
>
>
> On Mar 21, 2012, at 11:15 AM, Brock Palen wrote:
>
>> Forgotten stack as promised, it keeps changing at the lower level opal_progress, but never moves above that.
>>
>> [yccho_at_nyx0817 ~]$ padb -Ormgr=orte --all --stack-trace --tree --all
>> Stack trace(s) for thread: 1
>> -----------------
>> [0-63] (64 processes)
>> -----------------
>> main() at ?:?
>> Loci::makeQuery(Loci::rule_db const&, Loci::fact_db&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)() at ?:?
>> Loci::execute_list::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_list::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_list::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_loop::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_list::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_list::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_loop::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_list::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> Loci::execute_rule::execute(Loci::fact_db&, Loci::sched_db&)() at ?:?
>> streamUns::HypreSolveUnit::compute(Loci::sequence const&)() at ?:?
>> hypre_BoomerAMGSetup() at ?:?
>> hypre_BoomerAMGBuildInterp() at ?:?
>> -----------------
>> [0,2-3,5-16,18-19,21-24,27-34,36-63] (57 processes)
>> -----------------
>> hypre_ParCSRMatrixExtractBExt() at ?:?
>> hypre_ParCSRMatrixExtractBExt_Arrays() at ?:?
>> hypre_ParCSRCommHandleDestroy() at ?:?
>> PMPI_Waitall() at ?:?
>> -----------------
>> [0,2-3,5,7-16,18-19,21-24,27-34,36-63] (56 processes)
>> -----------------
>> ompi_request_default_wait_all() at ?:?
>> opal_progress() at ?:?
>> -----------------
>> [6] (1 processes)
>> -----------------
>> ompi_mtl_psm_progress() at ?:?
>> -----------------
>> [1,4,17,20,25-26,35] (7 processes)
>> -----------------
>> hypre_ParCSRCommHandleDestroy() at ?:?
>> PMPI_Waitall() at ?:?
>> ompi_request_default_wait_all() at ?:?
>> opal_progress() at ?:?
>> Stack trace(s) for thread: 2
>> -----------------
>> [0-63] (64 processes)
>> -----------------
>> start_thread() at ?:?
>> ips_ptl_pollintr() at ptl_rcvthread.c:324
>> poll() at ?:?
>>
>>
>> Brock Palen
>> www.umich.edu/~brockp
>> CAEN Advanced Computing
>> brockp_at_[hidden]
>> (734)936-1985
>>
>>
>>
>> On Mar 21, 2012, at 11:14 AM, Brock Palen wrote:
>>
>>> I have a users code that appears to be hanging some times on MPI_Waitall(), stack trace from padb below. It is on qlogic IB using the psm mtl.
>>> Without knowing what requests go to which rank, how can I check that this code didn't just get its self into a deadlock? Is there a way to get a reable list of every ranks posted sends? And then query an wiating MPI_Waitall() of a running job to get what rends/recvs it is waiting on?
>>>
>>> Thanks!
>>>
>>> Brock Palen
>>> www.umich.edu/~brockp
>>> CAEN Advanced Computing
>>> brockp_at_[hidden]
>>> (734)936-1985
>>>
>>>
>>>
>>
>>
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
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