[mvapich-discuss] Configre with hwloc, but have errors

[Krishna Chaitanya Kandalla]

Hi Haoanyi,
Since you have configured the library with "ch3:sock" and not with 
"gen2", the code path that is used will be different. If you are 
interesting in playing around with MVAPICH2's core-mapping features, you 
will have to build the library as we had discussed in the previous 
e-mails. Since it appears as though you can only build MPI over TCP/IP, 
it would be more appropriate for you to use MPICH2's latest version. 
They also have hwloc support. You can find out more about their package 
at : http://www.mcs.anl.gov/research/projects/mpich2/. Hope this helps.

Thanks,
Krishna


haoanyi wrote:
> Hi, Krishna,
> I really appreicate your help.
> I just want to use cpu affinity in mpi. Initially, I installed MVAPICH 
> (configured with no hwloc). And I also use MV2_CPU_MAPPING=0:1 in the 
> mpirun_rsh. To make sure, I also add MV2_ENABLE_AFFINITY=1 into the 
> command line. However, I did not observe processes being binded to 
> cores, by using "top". That caused to me to explore how MVAMPICH 
> supports cpu affinity, and was directed to hwloc.
>
> I wonder if this command really can do cpu affinity in MVAPICH2 which 
> is simply installed without hwloc.
> >>LD_LIBRARY_PATH=goto:$LD_LIBRARY_PATH mpirun_rsh -np 2 -hostfile 
> ../mpdintel.hosts MV2_ENABLE_AFFINITY=1 MV2_CPU_MAPPING=4 ./main 32 32 
> tests/
>
> where mpdintel.hosts has:
> intel01
> intel02
>
> Regards,
>
> 2010-03-27 02:58:01,"Krishna Chaitanya Kandalla" 
> <kandalla at cse.ohio-state.edu>
>
> >Hi Haoanyi, >MVAPICH2 works with InfiniBand, iWARP and RDMAoE. Within 
> our library, we >try to detect the hardware architecture and we bind 
> the processes to >cores in a specific manner, even without hwloc. 
> >But, if you are specifically looking for using hwloc with TCP/IP, I 
> >think you are better off using MPICH2's latest release. > >Thanks, 
> >Krishna > >haoanyi wrote: >>
>
>
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