[OMPI users] "No objects of the specified type were found on at least one node"?

Hi, I'm trying to get OpenMPI running in a new machine, and I came accross an error message that I hadn't seen before. , | can@login1:> mpirun -np 1 ./code config.txt | -- | No objects of the specified type were found on

Re: [OMPI users] "No objects of the specified type were found on at least one node"?

which version of ompi are you running ? this error can occur on systems with no NUMA object (e.g. single socket with hwloc < 2) as a workaround, you can mpirun --map-by socket ... iirc, this has been fixed Cheers, Gilles On Thursday, March 9, 2017, Angel de Vicente wrote: > Hi, > > I'm tryin

Re: [OMPI users] "No objects of the specified type were found on at least one node"?

Hi, Gilles Gouaillardet writes: > which version of ompi are you running ? 2.0.1 > this error can occur on systems with no NUMA object (e.g. single > socket with hwloc < 2) > as a workaround, you can > mpirun --map-by socket ... with --map-by socket I get exactly the same issue (both in the log

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Can you run lstopo in your machine, and post the output ? can you also try mpirun --map-by socket --bind-to socket ... and see if it helps ? Cheers, Gilles On Thursday, March 9, 2017, Angel de Vicente wrote: > Hi, > > Gilles Gouaillardet > writes: > > which version of ompi are you running ?

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Hi, Gilles Gouaillardet writes: > Can you run > lstopo > in your machine, and post the output ? no lstopo in my machine. This is part of hwloc, right? > can you also try > mpirun --map-by socket --bind-to socket ... > and see if it helps ? same issue. Perhaps I need to compile hwloc as well?

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Yes, lstopo is part of hwloc by default, Open MPI uses an embedded version of hwloc 1.11.2, so i suggest you install the full hwloc with the same version Cheers, Gilles - Original Message - > Hi, > > Gilles Gouaillardet writes: > > Can you run > > lstopo > > in your machine, and post

Re: [OMPI users] openib/mpi_alloc_mem pathology

Paul Kapinos writes: > Hi Dave, > > > On 03/06/17 18:09, Dave Love wrote: >> I've been looking at a new version of an application (cp2k, for for what >> it's worth) which is calling mpi_alloc_mem/mpi_free_mem, and I don't > > Welcome to the club! :o) > In our measures we see some 70% of time in '

Re: [OMPI users] openib/mpi_alloc_mem pathology

Nathan Hjelm writes: > If this is with 1.10.x or older run with --mca memory_linux_disable > 1. There is a bad interaction between ptmalloc2 and psm2 support. This > problem is not present in v2.0.x and newer. Is that applicable to openib too? ___ user

Re: [OMPI users] Shared Windows and MPI_Accumulate

Hi Joseph, in your code, you are updating the local buffer, which is also exposed via the window, right after the lock_all call, but the stores (baseptr[i] = 1000 + loffs++, let's call those the buffer initialization) are may overwrite the outcome of other concurrent operations, i.e. the accumulat

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Hi again, thanks for your help. I installed the latest OpenMPI (2.0.2). lstopo output: , | lstopo --version | lstopo 1.11.2 | | lstopo | Machine (7861MB) | L2 L#0 (1024KB) + L1d L#0 (32KB) + L1i L#0 (64KB) + Core L#0 + PU L#0 | (P#0) | L2 L#1 (1024KB) + L1d L#1 (32KB) + L1i L#1 (64KB

Re: [OMPI users] Shared Windows and MPI_Accumulate

On 03/09/2017 03:10 PM, Steffen Christgau wrote: > > Since you are using > the unified model, you can omit the proposed exclusive lock (see above) > as well. To be fair, you have to be cautious when doing that - even in the unified model. See example 11.7 in the MPI-3.1 standard. In that context,

Re: [OMPI users] "No objects of the specified type were found on at least one node"

What's this machine made of? (processor, etc) What kernel are you running ? Getting no "socket" or "package" at all is quite rare these days. Brice Le 09/03/2017 15:28, Angel de Vicente a écrit : > Hi again, > > thanks for your help. I installed the latest OpenMPI (2.0.2). > > lstopo output:

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Can this help? If you think any other information could be relevant, let me know. Cheers, Ángel cat /proc/cpuinfo processor : 0 cpu : PPC970MP, altivec supported clock : 2297.70MHz revision: 1.1 (pvr 0044 0101) [4 processors] timebase: 14318000 ma

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Ok, that's a very old kernel on a very old POWER processor, it's expected that hwloc doesn't get much topology information, and it's then expected that OpenMPI cannot apply most binding policies. Brice Le 09/03/2017 16:12, Angel de Vicente a écrit : > Can this help? If you think any other infor

Re: [OMPI users] Shared Windows and MPI_Accumulate

Well, that is embarrassing! Thank you so much for figuring this out and providing a detailed answer (also thanks to everyone else who tried to reproduce it). I guess I assumed some synchronization in lock_all even though I know that it is not collective. With an additional barrier between initi

Re: [OMPI users] "No objects of the specified type were found on at least one node"

Angel, i suggest you get an xml topo with hwloc --of xml on both your "exotic" POWER platform and a more standard and recent one. then you can manually edit the xml topology and add the missing objects. finally, you can pass this to Open MPI like this mpirun --mca hwloc_base_topo_file myt