[mvapich-discuss] MVAPICH2 2.2, GROMACS 2016.x, and MV2_ENABLE_AFFINITY

[Panda, Dhabaleswar]

Hi Ryan,

Several members of the MVAPICH team have been on international travel this week. We are taking a look at your issue and will get back to you shortly. 

Thanks,

DK

Sent from my iPhone

> On Jan 25, 2018, at 3:20 PM, Ryan Novosielski <novosirj at rutgers.edu> wrote:
> 
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> It's unusual not to get a response on this list, so I wanted to check
> to see if there was something else I should do or maybe if it was just
> missed.
> 
>> On 01/18/2018 03:37 PM, Ryan Novosielski wrote:
>> Hi all,
>> 
>> I had reported to me some time ago users seeing an error like the
>> following when running GROMACS with MVAPICH2 2.2 (using PMI2 with
>> SLURM 16.05.10):
>> 
>> [novosirj at perceval2 build]$ module load intel/17.0.1  mvapich2/2.2
>> gromacs [novosirj at perceval2 build]$ srun --pty -p main -t 20:00
>> bash -i [novosirj at node073 build]$ gmx_mpi Warning! : Core id 32525
>> does not exist on this architecture! CPU Affinity is undefined 
>> Error parsing CPU mapping string INTERNAL ERROR: invalid error code
>> ffffffff (Ring Index out of range) in MPIDI_CH3I_set_affinity:2391
>> 
>> I recently discovered that I can get around this by setting
>> MV2_ENABLE_AFFINITY=0. I’m told by one of my users that they don’t
>> see this on MVAPICH2 2.1 or 2.3a. Does anyone know what the deal is
>> with this and whether there’s something wrong that causes it?
>> 
>> I see someone else asked about this right around the time of SC16,
>> but there doesn’t seem to have been a resolution:
>> 
>> http://mailman.cse.ohio-state.edu/pipermail/mvapich-discuss/2016-Novem
> ber/006253.html
>> 
>> Thanks!
> 
> - -- 
> ____
> || \\UTGERS,     |----------------------*O*------------------------
> ||_// the State  |    Ryan Novosielski - novosirj at rutgers.edu
> || \\ University | Sr. Technologist - 973/972.0922 ~*~ RBHS Campus
> ||  \\    of NJ  | Office of Advanced Res. Comp. - MSB C630, Newark
>      `'
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