[mpich-discuss] issue setting process-core mapping with hydra

[sreeram potluri]

Pavan,

This seems to be something to do with my environment. I tried a fresh
check-out of MPICH2 but still see the same issue. I see the same error with
any of the hwloc commands available from my MPICH2 build.

However, none of the other folks here see it.

I will try to figure out whats wrong.

Thanks for your time and sorry for the trouble.

Sreeram Potluri

On Wed, Nov 10, 2010 at 9:11 AM, Pavan Balaji <balaji at mcs.anl.gov> wrote:

>
> Works fine for me.
>
>
> /home/balaji/software/mpich2/mpich2-trunk-r7431
> #wci-login# Wed Nov 10 09:10> ./bin/mpiexec -n 2 -binding user:0,1
> ./examples/cpi
> Process 0 of 2 is on wci37
> Process 1 of 2 is on wci37
>
> pi is approximately 3.1415926544231318, Error is 0.0000000008333387
> wall clock time = 0.000264
>
>
> /home/balaji/software/mpich2/mpich2-trunk-r7431
> #wci-login# Wed Nov 10 09:10> echo $SLURM_NODELIST
> wci[37-38]
>
>
> /home/balaji/software/mpich2/mpich2-trunk-r7431
> #wci-login# Wed Nov 10 09:11> ./bin/mpiexec -n 16 -binding user:0,1
> ./examples/cpi
> Process 5 of 16 is on wci37
> Process 6 of 16 is on wci37
> Process 0 of 16 is on wci37
> Process 1 of 16 is on wci37
> Process 3 of 16 is on wci37
> Process 4 of 16 is on wci37
> Process 2 of 16 is on wci37
> Process 7 of 16 is on wci37
> Process 8 of 16 is on wci38
> Process 9 of 16 is on wci38
> Process 10 of 16 is on wci38
> Process 11 of 16 is on wci38
> Process 13 of 16 is on wci38
> Process 14 of 16 is on wci38
> Process 15 of 16 is on wci38
> Process 12 of 16 is on wci38
> pi is approximately 3.1415926544231274, Error is 0.0000000008333343
> wall clock time = 0.002389
>
>  -- Pavan
>
>
> On 11/10/2010 08:09 AM, Sayantan Sur wrote:
>
>> Hi Pavan,
>>
>> You should be able to 'salloc' them and use them.
>>
>> On Wed, Nov 10, 2010 at 9:05 AM, Pavan Balaji<balaji at mcs.anl.gov>  wrote:
>>
>>>
>>> On 11/10/2010 08:02 AM, sreeram potluri wrote:
>>>
>>>>
>>>> I am cc'ing Jonathan in this email. I think he should be able to get you
>>>> access.
>>>>
>>>
>>> I already have an account. I just need to know if I need to reserve
>>> machines
>>> in some way, or just salloc them and use them.
>>>
>>> Btw, it seems to work fine on the login node:
>>>
>>> /home/balaji/software/mpich2/mpich2-trunk-r7431
>>> #wci-login# Wed Nov 10 09:01>  ./bin/mpiexec -f ~/hosts -n 2 -binding
>>> user:0,1 ./examples/cpi
>>> Process 0 of 2 is on wci-login.cse.ohio-state.edu
>>> Process 1 of 2 is on wci-login.cse.ohio-state.edu
>>> pi is approximately 3.1415926544231318, Error is 0.0000000008333387
>>> wall clock time = 0.001009
>>>
>>> /home/balaji/software/mpich2/mpich2-trunk-r7431
>>> #wci-login# Wed Nov 10 09:04>  cat ~/hosts
>>> wci-login
>>> 127.0.0.1
>>>
>>>  -- Pavan
>>>
>>> --
>>> Pavan Balaji
>>> http://www.mcs.anl.gov/~balaji
>>>
>>>
>>>
>>
>>
>>
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
>
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