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

[Pavan Balaji]

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