[mpich-discuss] regarding parallel proramming error

[Wesley Bland]

Edit:

Can you attach you machine file and the *smallest amount of code that will
reproduce the error*. It's tough to dig through huge amounts of someone
else's code to find the error and while you're trying to reduce the amount
of code, you often find the issue.

Thanks,
Wesley


On Thu, Aug 22, 2013 at 3:46 AM, Mahesh Doijade <maheshdoijade at gmail.com>wrote:

> Can you attached your machinefile, your code and detailed error output.
>
>
> On Tue, Aug 20, 2013 at 4:11 PM, urmila pol <urmilec at gmail.com> wrote:
>
>> Dear sir,
>>
>> I was given following command it will give floating point error .
>> #mpirun -f mfile -np 2  hello4
>> Floating point exception
>>
>> if I give following it will execute for single node
>>
>> [root at masternode ~]# mpirun -np 2 hello4
>> Hello world from processor masternode.csd.com, rank 0 out of 2 processors
>> Hello world from processor masternode.csd.com, rank 1 out of 2 processors
>> [root at masternode ~]#
>>
>> Please guide me for above error .waiting for ur reply.
>>
>>
>>
>>
>>
>>
>>
>> On 8/20/13, urmila pol <urmilec at gmail.com> wrote:
>> > I do everything now i have one error flaoting point exception i am
>> > running my program now
>> > waiting for ur reply
>>
>> >
>> > With regards,
>> >
>> > Dr.Urmila R. Pol
>> > Assistant Professor,
>> > Department of computer Science,
>> > Shivaji University, Kolhapur.
>> >
>> >
>> > On Tue, Aug 20, 2013 at 10:44 AM, Mahesh Doijade
>> > <maheshdoijade at gmail.com>wrote:
>>
>> >
>> >>
>> >>      The issue seems to be that you have probably not created a
>> >> machinefile which consists of node name to number of processes mapping
>> >> and
>> >> this file should be present in the same dir. of the other nodes on
>> which
>> >> you are launching other MPI processes, this is required in case you
>> want
>> >> to
>> >> run the MPI program across the two or more nodes, you can find more
>> >> details
>> >> of the format in which this information has to be in the machinefile
>> and
>> >> the other requisite steps need for running your MPI program across
>> >> multiple
>> >> nodes from this link
>> >> http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager
>> >>        Also, in order to launch the processes across multiple nodes you
>> >> need to do ssh passwordless login among those nodes, in case you are
>> >> using
>> >> ssh as the connection mechanism, you can find more details about the
>> >> procedure for ssh passwordless login over here
>> >> http://www.techlitic.com/ssh-passwordless-login.html
>> >>
>> >>
>> >> Regards,
>> >> Mahesh Doijade,
>> >> http://www.techdarting.com/
>> >>
>> >>
>> >> On Tue, Aug 20, 2013 at 8:34 AM, Pavan Balaji <balaji at mcs.anl.gov>
>> wrote:
>> >>
>> >>>
>> >>> I'm pasting the error inline, for others' information.
>> >>>
>> >>> FYI, the error is "unable to open host file: machinefile".
>> >>>
>> >>> ----8<----
>> >>> mpirun -f machinefile -n 2 /home/urp/mpich-install/hello
>> >>> [mpiexec at masternode.csd.com] HYDU_parse_hostfile
>> >>> (./utils/args/args.c:323): unable to open host file: machinefile
>> >>> [mpiexec at masternode.csd.com] mfile_fn (./ui/mpich/utils.c:341): error
>> >>> parsing hostfile
>> >>> [mpiexec at masternode.csd.com] match_arg (./utils/args/args.c:153):
>> match
>> >>> handler returned error
>> >>> [mpiexec at masternode.csd.com] HYDU_parse_array
>> (./utils/args/args.c:175):
>> >>> argument matching returned error
>> >>> [mpiexec at masternode.csd.com] parse_args (./ui/mpich/utils.c:1609):
>> error
>> >>> parsing input array
>> >>> [mpiexec at masternode.csd.com] HYD_uii_mpx_get_parameters
>> >>> (./ui/mpich/utils.c:1660): unable to parse user arguments
>> >>> [mpiexec at masternode.csd.com] main (./ui/mpich/mpiexec.c:153): error
>> >>> parsing parameters
>> >>> [root at masternode ~]#
>> >>> ----8<----
>> >>>
>> >>> On 08/19/2013 01:27 AM, urmila pol wrote:
>> >>>
>> >>>> Dear sir,
>> >>>>
>> >>>> I have attaching the screenshots of my errors please guide me
>> .waiting
>> >>>> for reply.
>> >>>>
>> >>>>
>> >>>> With regards,
>> >>>>
>> >>>> Dr.Urmila R. Pol
>> >>>> Assistant Professor,
>> >>>> Department of computer Science,
>> >>>> Shivaji University, Kolhapur.
>> >>>>
>> >>>>
>> >>> --
>> >>> Pavan Balaji
>> >>> http://www.mcs.anl.gov/~balaji
>> >>> ______________________________**_________________
>>
>> >>> discuss mailing list     discuss at mpich.org
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>> https://lists.mpich.org/mailman/listinfo/discuss>
>> >>>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>>
>>
>> --
>>
>> With regards,
>>
>> Dr.Urmila R. Pol
>> Assistant Professor,
>> Department of computer Science,
>> Shivaji University, Kolhapur.
>>
>
>
>
> --
>
> Regards,
> -- Mahesh Doijade
>
>
>
>
>
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