[mpich-discuss] problems with wmpiconfig on Windows Server 2008 SP2

Fri Jun 29 12:11:50 CDT 2012

Hi,
 The issues that you see with R/Rmpi are unlikely to be related to bugs in wmpiconfig (The wrapper utils, wmpi*, are thin convenience wrappers to execute mpiexec for users unfamiliar with running it from a command prompt. All the commands executed via wmpiexec can be executed using mpiexec from the command line.).
 How do you run R/Rmpi (Can you run "mpiexec -n 2 Rmpi")?

Regards,
Jayesh

----- Original Message -----
From: "Timothy Handley" <Timothy_Handley at nps.gov>
To: "Jayesh Krishna" <jayesh at mcs.anl.gov>
Cc: mpich-discuss at mcs.anl.gov
Sent: Friday, June 29, 2012 11:26:03 AM
Subject: Re: [mpich-discuss] problems with wmpiconfig on Windows Server 2008 SP2

Jayesh,

Thanks for the info.

Unfortunately, I can't run my code from a Windows command prompt. R is an
interpreted language, and must be run through an R console. Rmpi is an
extension to R that provides a wrapper/interface to MPICH2 from within an R
console. I had hoped to be able to break my analysis into pieces, then use
Rmpi from within R to do the computation for each piece in a separate
thread.

Is the issue in wmpiexec or in wmpiconfig? What are the limitations imposed
by this issue?

I'm unclear on the workings of MPICH2 and Rmpi, so I don't know which parts
of the MPICH2 install are used by Rmpi. So I'm not clear on whether my
particular problem could be resolved through changes to Rmpi, changes to my
system, or even resolved at all. And I understand that you can't be expert
on all processes that would like to use MPICH2. My next step would be to
contact the maintainer of Rmpi, so if you had any ideas that might help in
this discussion, then I would appreciate hearing them.

Thanks,

Tim Handley
Biological Science Technician
Mediterranean Network, NPS
805-658-5759 (CHIS)
805-370-2396 (SAMO)

             Jayesh Krishna                                                
             <jayesh at mcs.anl.g                                             
             ov>                                                        To 
                                       mpich-discuss at mcs.anl.gov           
             06/29/2012 08:58                                           cc 
             AM                        Timothy_Handley at nps.gov             
                                                                   Subject 
                                       Re: [mpich-discuss] problems with   
                                       wmpiconfig on Windows Server 2008   
                                       SP2                                 

Hi,
 These are known bugs with wmpiexec. Unfortunately we don't have enough
developer bandwidth to fix these issues right now.
 Can you run your job (with Rmpi) from the command prompt?

Regards,
Jayesh

----- Original Message -----
From: "Timothy Handley" <Timothy_Handley at nps.gov>
To: mpich-discuss at mcs.anl.gov
Sent: Friday, June 29, 2012 10:20:37 AM
Subject: [mpich-discuss] problems with wmpiconfig on Windows Server 2008
SP2

Hello folks,

I'm having trouble with MPICH2. I've tried a few different things, but have
been unable to resolve the problem. If any of you could help me to figure
this out, I'd greatly appreciate it.

Details:
{All this was done from an administrator account}
) I have an 8-core box running Windows Server 2008 SP2 64-bit
) Yesterday, I downloaded and installed MPICH2 1.4.1p1 from the .msi file
) I ran wmpiregister, and gave it a local account.
) I ran wmpiconfig, but am unable to do much with it. If I click 'scan for
versions', then it reports that MPICH2 1.4.1p1 is installed on this
machine. However, if I click 'Get Settings', then I get an error "MPICH2
not installed or unable to query the host". In the left-hand box, the name
of the host remains black rather than green.
) I ran some tests via the command prompt. It turns out that I can use
mpiexec to run the example cpi program on a specified number of cores:

   C:\Program Files\MPICH2>cd examples

   C:\Program Files\MPICH2\examples>mpiexec -n 3 cpi
   Enter the number of intervals: (0 quits) 100000000000
   pi is approximately 3.1415926535897443, Error is 0.0000000000000488
   wall clock time = 3.466131
   Enter the number of intervals: (0 quits) 0

   C:\Program Files\MPICH2\examples>mpiexec -n 6 cpi
   Enter the number of intervals: (0 quits) 100000000000
   pi is approximately 3.1415926535897096, Error is 0.0000000000000835
   wall clock time = 1.731985
   Enter the number of intervals: (0 quits) 0

   C:\Program Files\MPICH2\examples>smpd -status
   smpd running on INPSAMO-CHUGGA.nps.doi.net

) This is great, and it suggests that MPICH2 is installed correctly. So why
am I having trouble with wmpiconfig?
) I turned off Windows Firewall
) Same deal. I can run mpiexec via command prompt, but wmpiconfig still
cannot get settings. Hostname is black.
) I right-click wmpiconfig, and 'run as Administrator'
) Same deal. wmpiconfig cannot get settings. Hostname is black.
) The goal is to do parallel processing via R and the Rmpi library. Just
for fun, I started R, loaded the Rmpi library, and asked for 2 slaves. This
caused R to hang.
) Right-click on R, 'run as Administrator', load the Rmpi library, and ask
for two slaves. R hangs.

So some parts of this system are working (mpiexec via command prompt) but
some parts are not (wmpiconfig, R/Rmpi). Unfortunately, I don't know where
the problem might be. Any advice would be greatly appreciated,

Tim Handley
Biological Science Technician
Mediterranean Network, NPS
805-658-5759 (CHIS)
805-370-2396 (SAMO)

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