[mpich-discuss] cryptic (to me) error

Dave Goodell goodell at mcs.anl.gov
Fri Sep 3 09:35:37 CDT 2010


I was unclear.  I meant to use HYDRA_HOST_FILE when running the MPICH2 test suite in order to make it run across the same set of machines that your MCNP code runs on.

-Dave

On Sep 3, 2010, at 9:25 AM CDT, SULLIVAN David (AREVA) wrote:

> Same result, mpi doesn't even get to call mcnp5.mpi. It just returns the
> 
> Fatal error in PMPI_Comm_dup: Other MPI error, error stack: error. 
> 
> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Dave Goodell
> Sent: Friday, September 03, 2010 10:21 AM
> To: mpich-discuss at mcs.anl.gov
> Subject: Re: [mpich-discuss] cryptic (to me) error
> 
> Try setting HYDRA_HOST_FILE=your_machine_file_here
> 
> This will make hydra act as though you passed "-f your
> machine_file_here" to every mpiexec.
> 
> http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager
> #Environment_Settings
> 
> -Dave
> 
> On Sep 3, 2010, at 5:00 AM CDT, SULLIVAN David (AREVA) wrote:
> 
>> I was wondering about that. Is there a configuration file that sets up
> the cluster and defines which node to run on? Would that make the issue
> any clearer?
>> 
>> Thanks,
>> 
>> Dave
>> 
>> 
>> -----Original Message-----
>> From: mpich-discuss-bounces at mcs.anl.gov on behalf of Rajeev Thakur
>> Sent: Thu 9/2/2010 10:22 PM
>> To: mpich-discuss at mcs.anl.gov
>> Subject: Re: [mpich-discuss] cryptic (to me) error
>> 
>> There might be some connection issues between the two machines. The
> MPICH2 test suite that you ran with "make testing" probably ran on a
> single machine.
>> 
>> On Sep 2, 2010, at 6:27 PM, SULLIVAN David (AREVA) wrote:
>> 
>>> The error occurs immediately- I don't think it even starts the
> executable. It does work on the single machine with 4 processes.
>>> 
>>> 
>>> -----Original Message-----
>>> From: mpich-discuss-bounces at mcs.anl.gov on behalf of Rajeev Thakur
>>> Sent: Thu 9/2/2010 4:34 PM
>>> To: mpich-discuss at mcs.anl.gov
>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>> 
>>> Does it run with 2 processes on a single machine?
>>> 
>>> 
>>> On Sep 2, 2010, at 2:38 PM, SULLIVAN David (AREVA) wrote:
>>> 
>>>> That fixed the compile. Thanks!
>>>> 
>>>> The latest release does not fix the issues I am having though. Cpi 
>>>> works fine, the test suit is certainly improved (see summary.xml 
>>>> output) though when I try to use mcnp it still crashes in the same 
>>>> way (see
>>>> error.txt)
>>>> 
>>>> -----Original Message-----
>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Anthony Chan
>>>> Sent: Thursday, September 02, 2010 1:38 PM
>>>> To: mpich-discuss at mcs.anl.gov
>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>> 
>>>> 
>>>> There is a bug in 1.3b1 about the option --enable-fc.  Since Fortran
> 
>>>> 90 is enabled by default, so remove the --enable-fc from your 
>>>> configure command and try again.  If there is error again, send us 
>>>> the configure output as you seen on your screen (See README) instead
> of config.log.
>>>> 
>>>> A.Chan
>>>> 
>>>> ----- "SULLIVAN David (AREVA)" <David.Sullivan at areva.com> wrote:
>>>> 
>>>>> Failure again.
>>>>> The 1.3 beta version will not compile with Intel 10.1. It bombs at 
>>>>> the
>>>> 
>>>>> configuration script:
>>>>> 
>>>>> checking for Fortran flag needed to allow free-form source... 
>>>>> unknown
>>>>> configure: WARNING: Fortran 90 test being disabled because the 
>>>>> /home/dfs/mpich2-1.3b1/bin/mpif90 compiler does not accept a .f90 
>>>>> extension
>>>>> configure: error: Fortran does not accept free-form source
>>>>> configure: error: ./configure failed for test/mpi
>>>>> 
>>>>> I have attached to config.log
>>>>> 
>>>>> -----Original Message-----
>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Rajeev 
>>>>> Thakur
>>>>> Sent: Thursday, September 02, 2010 12:11 PM
>>>>> To: mpich-discuss at mcs.anl.gov
>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>> 
>>>>> Just try relinking with the new library at first.
>>>>> 
>>>>> Rajeev
>>>>> 
>>>>> On Sep 2, 2010, at 9:32 AM, SULLIVAN David (AREVA) wrote:
>>>>> 
>>>>>> I saw that there was a newer beta. I was really hoping to find I
>>>>> just
>>>>>> configured something incorrectly. Will this not require me to
>>>>> re-build
>>>>> 
>>>>>> mcnp (the only program I run that uses mpi for parallel) if I 
>>>>>> change
>>>>> 
>>>>>> the mpi version? If so, this is a bit of a hardship, requiring 
>>>>>> codes
>>>>> 
>>>>>> to be revalidated. If not- I will try it in a second.
>>>>>> 
>>>>>> Thanks,
>>>>>> 
>>>>>> Dave
>>>>>> 
>>>>>> -----Original Message-----
>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Dave
>>>>> Goodell
>>>>>> Sent: Thursday, September 02, 2010 10:27 AM
>>>>>> To: mpich-discuss at mcs.anl.gov
>>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>>> 
>>>>>> Can you try the latest release (1.3b1) to see if that fixes the 
>>>>>> problems you are seeing with your application?
>>>>>> 
>>>>>> 
>>>>> http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php
>>>>> ?s=
>>>>>> do
>>>>>> wnloads
>>>>>> 
>>>>>> -Dave
>>>>>> 
>>>>>> On Sep 2, 2010, at 9:15 AM CDT, SULLIVAN David (AREVA) wrote:
>>>>>> 
>>>>>>> Another output file, hopefully of use. 
>>>>>>> 
>>>>>>> Thanks again
>>>>>>> 
>>>>>>> Dave
>>>>>>> 
>>>>>>> -----Original Message-----
>>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of SULLIVAN 
>>>>>>> David
>>>>>>> (AREVA)
>>>>>>> Sent: Thursday, September 02, 2010 8:20 AM
>>>>>>> To: mpich-discuss at mcs.anl.gov
>>>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>>>> 
>>>>>>> First my apologies for the delay in continuing this thread.
>>>>>>> Unfortunately I have not resolved it so if I can indulge the 
>>>>>>> gurus
>>>>> 
>>>>>>> and
>>>>>> 
>>>>>>> developers once again...
>>>>>>> 
>>>>>>> As suggested by Rajeev I ran the testing suit in the source
>>>>> directory.
>>>>>>> The output of errors, which are similar to what I was seeing when
> 
>>>>>>> I
>>>>> 
>>>>>>> ran
>>>>>>> mcnp5 (v. 1.40 and 1.51), is attached. 
>>>>>>> 
>>>>>>> Any insights would be greatly appreciated,
>>>>>>> 
>>>>>>> Dave
>>>>>>> 
>>>>>>> -----Original Message-----
>>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Rajeev
>>>>> Thakur
>>>>>>> Sent: Wednesday, August 04, 2010 3:06 PM
>>>>>>> To: mpich-discuss at mcs.anl.gov
>>>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>>>> 
>>>>>>> Then one level above that directory (in the main MPICH2 source 
>>>>>>> directory), type make testing, which will run through the entire
>>>>>>> MPICH2 test suite.
>>>>>>> 
>>>>>>> Rajeev
>>>>>>> 
>>>>>>> On Aug 4, 2010, at 2:04 PM, SULLIVAN David (AREVA) wrote:
>>>>>>> 
>>>>>>>> Oh. That's  embarrassing. Yea. I have those examples. It runs
>>>>> with
>>>>>>>> no
>>>>>>>> problems:
>>>>>>>> 
>>>>>>>> [dfs at aramis examples]$ mpiexec -host aramis -n 4 ./cpi Process 2
>>>>> of
>>>>>>>> 4
>>>>>> 
>>>>>>>> is on aramis Process 3 of 4 is on aramis Process 0 of 4 is on
>>>>> aramis
>>>>> 
>>>>>>>> Process 1 of 4 is on aramis pi is approximately
>>>>> 3.1415926544231239,
>>>>>>>> Error is 0.0000000008333307 wall clock time = 0.000652
>>>>>>>> 
>>>>>>>> 
>>>>>>>> -----Original Message-----
>>>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Gus
>>>>> Correa
>>>>>>>> Sent: Wednesday, August 04, 2010 1:13 PM
>>>>>>>> To: Mpich Discuss
>>>>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>>>>> 
>>>>>>>> Hi David
>>>>>>>> 
>>>>>>>> I think the "examples" dir is not copied to the installation
>>>>>>> directory.
>>>>>>>> You may find it where you decompressed the MPICH2 tarball, in 
>>>>>>>> case
>>>>> 
>>>>>>>> you
>>>>>>> 
>>>>>>>> installed it from source.
>>>>>>>> At least, this is what I have here.
>>>>>>>> 
>>>>>>>> Gus Correa
>>>>>>>> 
>>>>>>>> 
>>>>>>>> SULLIVAN David (AREVA) wrote:
>>>>>>>>> Yea, that always bothered me.  There is no such folder.
>>>>>>>>> There are :
>>>>>>>>> bin
>>>>>>>>> etc
>>>>>>>>> include
>>>>>>>>> lib
>>>>>>>>> sbin
>>>>>>>>> share
>>>>>>>>> 
>>>>>>>>> The  only examples I found were in the  share folder,  where
>>>>> there
>>>>>>>> are
>>>>>>>>> examples for collchk,  graphics and  logging.   
>>>>>>>>> 
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Rajeev 
>>>>>>>>> Thakur
>>>>>>>>> Sent: Wednesday, August 04, 2010 12:45 PM
>>>>>>>>> To: mpich-discuss at mcs.anl.gov
>>>>>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>>>>>> 
>>>>>>>>> Not cpilog. Can you run just cpi from the mpich2/examples
>>>>> directory.
>>>>>>>>> 
>>>>>>>>> Rajeev
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> On Aug 4, 2010, at 11:37 AM, SULLIVAN David (AREVA) wrote:
>>>>>>>>> 
>>>>>>>>>> Rajeev,  Darius,
>>>>>>>>>> 
>>>>>>>>>> Thanks for your response.
>>>>>>>>>> cpi yields  the  following-
>>>>>>>>>> 
>>>>>>>>>> [dfs at aramis examples_logging]$ mpiexec -host aramis -n 12
>>>>> ./cpilog
>>>>> 
>>>>>>>>>> Process 0 running on aramis Process 2 running on aramis 
>>>>>>>>>> Process
>>>>> 3
>>>>>>>>>> running on aramis Process 1 running on aramis Process 6 
>>>>>>>>>> running
>>>>> on
>>>>> 
>>>>>>>>>> aramis Process 7 running on aramis Process 8 running on aramis
> 
>>>>>>>>>> Process
>>>>>>>>> 
>>>>>>>>>> 4 running on aramis Process 5 running on aramis Process 9
>>>>> running
>>>>>>>>>> on
>>>>>>> 
>>>>>>>>>> aramis Process 10 running on aramis Process 11 running on 
>>>>>>>>>> aramis
>>>>> 
>>>>>>>>>> pi
>>>>>> 
>>>>>>>>>> is
>>>>>>>>> 
>>>>>>>>>> approximately 3.1415926535898762, Error is 0.0000000000000830
>>>>> wall
>>>>> 
>>>>>>>>>> clock time = 0.058131 Writing logfile....
>>>>>>>>>> Enabling the Default clock synchronization...
>>>>>>>>>> clog_merger.c:CLOG_Merger_init() -  Could not open file 
>>>>>>>>>> ./cpilog.clog2 for merging!
>>>>>>>>>> Backtrace of the callstack at rank 0:
>>>>>>>>>> At [0]: ./cpilog(CLOG_Util_abort+0x92)[0x456326]
>>>>>>>>>> At [1]: ./cpilog(CLOG_Merger_init+0x11f)[0x45db7c]
>>>>>>>>>> At [2]: ./cpilog(CLOG_Converge_init+0x8e)[0x45a691]
>>>>>>>>>> At [3]: ./cpilog(MPE_Finish_log+0xea)[0x4560aa]
>>>>>>>>>> At [4]: ./cpilog(MPI_Finalize+0x50c)[0x4268af]
>>>>>>>>>> At [5]: ./cpilog(main+0x428)[0x415963]  At [6]:
>>>>> /lib64/libc.so.6(__libc_start_main+0xf4)[0x3c1881d994]
>>>>>>>>>> At [7]: ./cpilog[0x415449]
>>>>>>>>>> application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0 
>>>>>>>>>> APPLICATION TERMINATED WITH THE EXIT STRING: Terminated 
>>>>>>>>>> (signal
>>>>> 
>>>>>>>>>> 15)
>>>>>>>>>> 
>>>>>>>>>> So  it looks like it works  with some issues.
>>>>>>>>>> 
>>>>>>>>>> When does  it fail? Immediately
>>>>>>>>>> 
>>>>>>>>>> Is there  a  bug? Many sucessfully use the aplication (MCNP5, 
>>>>>>>>>> from
>>>>>>>>>> LANL) with  mpi,  so  think that  a  bug there is  unlikely.
>>>>>>>>>> 
>>>>>>>>>> Core files, unfortunately reveals some ignorance on my part.
>>>>> Were
>>>>>>>>>> exactly should I be looking for them?
>>>>>>>>>> 
>>>>>>>>>> Thanks again,
>>>>>>>>>> 
>>>>>>>>>> Dave
>>>>>>>>>> -----Original Message-----
>>>>>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Darius
> 
>>>>>>>>>> Buntinas
>>>>>>>>>> Sent: Wednesday, August 04, 2010 12:19 PM
>>>>>>>>>> To: mpich-discuss at mcs.anl.gov
>>>>>>>>>> Subject: Re: [mpich-discuss] cryptic (to me) error
>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>> This error message says that two processes terminated because
>>>>> they
>>>>> 
>>>>>>>>>> were unable to communicate with another (or two other)
> process.
>>>>>>> It's
>>>>>>>> 
>>>>>>>>>> possible that another process died, so the others got errors 
>>>>>>>>>> trying
>>>>>> 
>>>>>>>>>> to
>>>>>>>>> 
>>>>>>>>>> communicate with them.  It's also possible that there is
>>>>> something
>>>>> 
>>>>>>>>>> preventing some processes from communicating with each other.
>>>>>>>>>> 
>>>>>>>>>> Are you able to run cpi from the examples directory with 12
>>>>>>>> processes?
>>>>>>>>>> 
>>>>>>>>>> At what point in your code does this fail?  Are there any 
>>>>>>>>>> other
>>>>> 
>>>>>>>>>> communication operations before the MPI_Comm_dup?
>>>>>>>>>> 
>>>>>>>>>> Enable core files (add "ulimit -c unlimited" to your .bashrc 
>>>>>>>>>> or
>>>>>>>>>> .tcshrc) then run your app and look for core files.  If there 
>>>>>>>>>> is
>>>>> a
>>>>> 
>>>>>>>>>> bug
>>>>>>>>> 
>>>>>>>>>> in your application that causes a process to die this might 
>>>>>>>>>> tell
>>>>> 
>>>>>>>>>> you
>>>>>>> 
>>>>>>>>>> which one and why.
>>>>>>>>>> 
>>>>>>>>>> Let us know how this goes.
>>>>>>>>>> 
>>>>>>>>>> -d
>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>> On Aug 4, 2010, at 11:03 AM, SULLIVAN David (AREVA) wrote:
>>>>>>>>>> 
>>>>>>>>>>> Since I have  had  no responses, is  there any other
>>>>> additional
>>>>>>>>>> information could I provide to solicit some direction for 
>>>>>>>>>> overcoming
>>>>>>> 
>>>>>>>>>> these latest string of mpi errors?
>>>>>>>>>>> Thanks,
>>>>>>>>>>> 
>>>>>>>>>>> Dave
>>>>>>>>>>> 
>>>>>>>>>>> From: mpich-discuss-bounces at mcs.anl.gov 
>>>>>>>>>>> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of
>>>>> SULLIVAN
>>>>>>>>>>> David F (AREVA NP INC)
>>>>>>>>>>> Sent: Friday, July 23, 2010 4:29 PM
>>>>>>>>>>> To: mpich-discuss at mcs.anl.gov
>>>>>>>>>>> Subject: [mpich-discuss] cryptic (to me) error
>>>>>>>>>>> 
>>>>>>>>>>> With my firewall issues firmly behind me, I have a new 
>>>>>>>>>>> problem
>>>>> 
>>>>>>>>>>> for
>>>>>> 
>>>>>>>>>>> the
>>>>>>>>>> collective wisdom. I am attempting to run a program to which 
>>>>>>>>>> the
>>>>> 
>>>>>>>>>> response is as follows:
>>>>>>>>>>> [mcnp5_1-4 at athos ~]$ mpiexec -f nodes -n 12 mcnp5.mpi i=TN04 
>>>>>>>>>>> o=TN04.o
>>>>>>>>> 
>>>>>>>>>>> Fatal error in MPI_Comm_dup: Other MPI error, error stack:
>>>>>>>>>>> MPI_Comm_dup(168).................:
>>>>> MPI_Comm_dup(MPI_COMM_WORLD,
>>>>>>>>>>> new_comm=0x7fff58edb450) failed
>>>>>>>>>>> MPIR_Comm_copy(923)...............:
>>>>>>>>>>> MPIR_Get_contextid(639)...........:
>>>>>>>>>>> MPI_Allreduce(773)................:
>>>>>>> MPI_Allreduce(sbuf=MPI_IN_PLACE,
>>>>>>>>>> rbuf=0x7fff
>>>>>>>>>> 58edb1a0, count=64, MPI_INT, MPI_BAND, MPI_COMM_WORLD) failed
>>>>>>>>>>> MPIR_Allreduce(228)...............:
>>>>>>>>>>> MPIC_Send(41).....................:
>>>>>>>>>>> MPIC_Wait(513)....................:
>>>>>>>>>>> MPIDI_CH3I_Progress(150)..........:
>>>>>>>>>>> MPID_nem_mpich2_blocking_recv(933):
>>>>>>>>>>> MPID_nem_tcp_connpoll(1709).......: Communication error Fatal
> 
>>>>>>>>>>> error
>>>>>>> 
>>>>>>>>>>> in
>>>>>>>>>>> MPI_Comm_dup: Other MPI error, error stack:
>>>>>>>>>>> MPI_Comm_dup(168).................:
>>>>> MPI_Comm_dup(MPI_COMM_WORLD,
>>>>>>>>>> new_comm=0x7fff
>>>>>>>>>> 97dca620) failed
>>>>>>>>>>> MPIR_Comm_copy(923)...............:
>>>>>>>>>>> MPIR_Get_contextid(639)...........:
>>>>>>>>>>> MPI_Allreduce(773)................:
>>>>>>> MPI_Allreduce(sbuf=MPI_IN_PLACE,
>>>>>>>>>> rbuf=0x7fff
>>>>>>>>>> 97dca370, count=64, MPI_INT, MPI_BAND, MPI_COMM_WORLD) failed
>>>>>>>>>>> MPIR_Allreduce(289)...............:
>>>>>>>>>>> MPIC_Sendrecv(161)................:
>>>>>>>>>>> MPIC_Wait(513)....................:
>>>>>>>>>>> MPIDI_CH3I_Progress(150)..........:
>>>>>>>>>>> MPID_nem_mpich2_blocking_recv(948):
>>>>>>>>>>> MPID_nem_tcp_connpoll(1709).......: Communication error 
>>>>>>>>>>> Killed
>>>>> by
>>>>> 
>>>>>>>>>>> signal 2.
>>>>>>>>>>> Ctrl-C caught... cleaning up processes [mpiexec at athos] 
>>>>>>>>>>> HYDT_dmx_deregister_fd (./tools/demux/demux.c:142): could not
> 
>>>>>>>>>>> find
>>>>>> 
>>>>>>>>>>> fd
>>>>>>>>> 
>>>>>>>>>>> to deregister: -2 [mpiexec at athos] HYD_pmcd_pmiserv_cleanup
>>>>>>>>>>> (./pm/pmiserv/pmiserv_cb.c:401): error deregistering fd 
>>>>>>>>>>> [press
>>>>> 
>>>>>>>>>>> Ctrl-C
>>>>>>>>> 
>>>>>>>>>>> again to force abort] APPLICATION TERMINATED WITH THE EXIT
>>>>> STRING:
>>>>>>>>>>> Killed (signal 9) [mcnp5_1-4 at athos ~]$ Any ideas?
>>>>>>>>>>> 
>>>>>>>>>>> Thanks in advance,
>>>>>>>>>>> 
>>>>>>>>>>> David Sullivan
>>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>> AREVA NP INC
>>>>>>>>>>> 400 Donald Lynch Boulevard
>>>>>>>>>>> Marlborough, MA, 01752
>>>>>>>>>>> Phone: (508) 573-6721
>>>>>>>>>>> Fax: (434) 382-5597
>>>>>>>>>>> David.Sullivan at AREVA.com
>>>>>>>>>>> 
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> mpich-discuss mailing list
>>>>>>>>>>> mpich-discuss at mcs.anl.gov
>>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>>>>>>>>>> _______________________________________________
>>>>>>>>>> mpich-discuss mailing list
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>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>>>>>>>>>> _______________________________________________
>>>>>>>>>> mpich-discuss mailing list
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>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>>>>>>>>> 
>>>>>>>>> _______________________________________________
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>>>>>>>> 
>>>>>>>> _______________________________________________
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>>>>>>> <summary.xml>_______________________________________________
>>>>>>> mpich-discuss mailing list
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>>>>>> 
>>>>>> _______________________________________________
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>>>>> 
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