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Subject: Re: [OMPI devel] [OMPI svn] svn:open-mpi r17941
From: Ralph H Castain (rhc_at_[hidden])
Date: 2008-03-27 13:06:30


Found the problem - should have a fix committed soon. Issue is with
differences in the number of daemons launched by the various plms (whether
or not procs are launched local to mpirun).

On 3/27/08 10:39 AM, "Ralph H Castain" <rhc_at_[hidden]> wrote:

> Hmmm...puzzling. It is working fine for me on TM machines and on my Mac.
> However, Galen reports it borked on alps as well.
>
> I'll have to dig a little to check this out and see if there is something
> missing on those PLMs. Will get back shortly.
>
> Sorry for problem
>
>
> On 3/27/08 10:28 AM, "Tim Prins" <tprins_at_[hidden]> wrote:
>
>> Unfortunately now with r17988 I cannot run any mpi programs, they seem
>> to hang in the modex.
>>
>> Tim
>>
>> Ralph H Castain wrote:
>>> Thanks Tim - I found the problem and will commit a fix shortly.
>>>
>>> Appreciate your testing and reporting!
>>>
>>>
>>> On 3/27/08 8:24 AM, "Tim Prins" <tprins_at_[hidden]> wrote:
>>>
>>>> This commit breaks things for me. Running on 3 nodes of odin:
>>>>
>>>> mpirun -mca btl tcp,sm,self examples/ring_c
>>>>
>>>> causes a hang. All of the processes are stuck in
>>>> orte_grpcomm_base_barrier during MPI_Finalize. Not all programs hang,
>>>> and the ring program does not hang all the time, but fairly often.
>>>>
>>>> Tim
>>>>
>>>> rhc_at_[hidden] wrote:
>>>>> Author: rhc
>>>>> Date: 2008-03-24 16:50:31 EDT (Mon, 24 Mar 2008)
>>>>> New Revision: 17941
>>>>> URL: https://svn.open-mpi.org/trac/ompi/changeset/17941
>>>>>
>>>>> Log:
>>>>> Fix the allgather and allgather_list functions to avoid deadlocks at large
>>>>> node/proc counts. Violated the RML rules here - we received the allgather
>>>>> buffer and then did an xcast, which causes a send to go out, and is then
>>>>> subsequently received by the sender. This fix breaks that pattern by
>>>>> forcing
>>>>> the recv to complete outside of the function itself - thus, the allgather
>>>>> and
>>>>> allgather_list always complete their recvs before returning or sending.
>>>>>
>>>>> Reogranize the grpcomm code a little to provide support for soon-to-come
>>>>> new
>>>>> grpcomm components. The revised organization puts what will be common code
>>>>> elements in the base to avoid duplication, while allowing components that
>>>>> don't need those functions to ignore them.
>>>>>
>>>>> Added:
>>>>> trunk/orte/mca/grpcomm/base/grpcomm_base_allgather.c
>>>>> trunk/orte/mca/grpcomm/base/grpcomm_base_barrier.c
>>>>> trunk/orte/mca/grpcomm/base/grpcomm_base_modex.c
>>>>> Text files modified:
>>>>> trunk/orte/mca/grpcomm/base/Makefile.am | 5
>>>>> trunk/orte/mca/grpcomm/base/base.h | 23 +
>>>>> trunk/orte/mca/grpcomm/base/grpcomm_base_close.c | 4
>>>>> trunk/orte/mca/grpcomm/base/grpcomm_base_open.c | 1
>>>>> trunk/orte/mca/grpcomm/base/grpcomm_base_select.c | 121 ++---
>>>>> trunk/orte/mca/grpcomm/basic/grpcomm_basic.h | 16
>>>>> trunk/orte/mca/grpcomm/basic/grpcomm_basic_component.c | 30 -
>>>>> trunk/orte/mca/grpcomm/basic/grpcomm_basic_module.c | 845
>>>>> ++-------------------------------------
>>>>> trunk/orte/mca/grpcomm/cnos/grpcomm_cnos.h | 8
>>>>> trunk/orte/mca/grpcomm/cnos/grpcomm_cnos_component.c | 8
>>>>> trunk/orte/mca/grpcomm/cnos/grpcomm_cnos_module.c | 21
>>>>> trunk/orte/mca/grpcomm/grpcomm.h | 45 +
>>>>> trunk/orte/mca/rml/rml_types.h | 31
>>>>> trunk/orte/orted/orted_comm.c | 27 +
>>>>> 14 files changed, 226 insertions(+), 959 deletions(-)
>>>>>
>>>>>
>>>>> Diff not shown due to size (92619 bytes).
>>>>> To see the diff, run the following command:
>>>>>
>>>>> svn diff -r 17940:17941 --no-diff-deleted
>>>>>
>>>>> _______________________________________________
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>>>>> svn_at_[hidden]
>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/svn
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