[mvapich-discuss] Process affinity setting

[Devendar Bureddy]

 Hi Vaibhav

Are you running with MVAPIVH or MVAPICH2?

MVAPICH/MVAPICH2 by default enables the CPU affinity.  You can find
more details in the following user guide sections.

MVAPICH:
http://mvapich.cse.ohio-state.edu/support/mvapich_user_guide-1.2rc1.html#x1-1340009.6.5

MVAPICH2:
http://mvapich.cse.ohio-state.edu/support/user_guide_mvapich2-1.8_alpha2.html#x1-520006.3

Can you let us know your configuration and run command?

The taskset should work with mpirun_rsh.  but, please make sure you
turn off MVAPICH/MVAPICH2 default provided affinity with
VIADEV_USE_AFFINITY=0 in MVAPICH and MV2_ENABLE_AFFINITY=0 in
MVAPICH2. Otherwise, there will be conflicting affinity settings as
both taskset and MVAPICH  try to set affinity.

-Devendar

On Fri, Feb 24, 2012 at 2:11 PM, vaibhav dutt
<vaibhavsupersaiyan9 at gmail.com> wrote:
> Hi,
>
> I was wondering whether the command taskset works with mpirun in MVAPICH.
> For example, mpirun -n 4 -hostfile hostfile.txt taskset -c 0,1  ./xyz.
> I tried this but it did not work for me. The CPU mapping of MVAPICH
> apparently is not
> working for me and processes are still migrating. Can anybody help me with
> this.
>
> Thanks.
>
> _______________________________________________
> mvapich-discuss mailing list
> mvapich-discuss at cse.ohio-state.edu
> http://mail.cse.ohio-state.edu/mailman/listinfo/mvapich-discuss
>