[mvapich-discuss] collectives fail under mvapich2-1.0 (fwd)

[amith rajith mamidala]

Hi Edmund,

We did a quick check with the icallgather test. The test is supposed to be
run on 5 processes. It passes if you run with this configuration. We did a
quick check with mpich2 on tcp and it hangs there too. Please take a look
at the testlist given in the directory which explains the test name and
the processes to run on,

thanks,

-Amith.

On Thu, 27 Sep 2007, Edmund Sumbar wrote:

> Thanks for your prompt reply Wei...
>
> wei huang wrote:
> > We wonder on how many processes you carried out the tests? Are you using
> > all 8 processors when running coll tests and SKaMPI tests?
>
> The tests passed for the 2- and 4-cpu cases within a node.
> The tests stall as soon as I go between nodes, for example,
> using one cpu on each of two nodes.
>
> Our nodes are running Linux kernel 2.6.21-smp, with the
> associated Infiniband driver modules installed.  Please
> let me know what other information you might need to
> investigate this issue.
>
>
> >> I'm trying to confirm my mvapich2-1.0 installation by running
> >> SKaMPI (pt2pt, coll, onesided), Intel MPI Benchmark (MPI1 only)
> >> and the mvapich2 coll tests.
> >>
> >> Running the mvapich2 coll tests in alphabetical order, I find
> >> that it stalls on "icallgather," that is, no output after
> >> several minutes and the next test is not run.  I also experience
> >> stalling with the coll and onesided SKaMPI tests.  The IMB-MPI1
> >> tests pass however.
> >>
> >> Mvapich2-1.0 was compiled using make.mvapich2.ofa (gcc 4.2.0).
> >> The tests were run under Torque using mpiexec-0.81 between two
> >> nodes (dual-socket, dual-core Opterons).
> >>
> >>    for test in allgather2 allgather3 ...; do
> >>      mpiexec $test >out 2>err
> >>    done
> >>
> >> No problem, when run within a node.
> >>
> >> Any ideas?
>
>
> --
> Ed[mund [Sumbar]]
> AICT Research Support, Univ of Alberta
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