[OMPI users] how MPI_Get can work with multiple memory regions attached to a window via MPI_Win_attach

[madhurima madhunapanthula]

 Hi,

In http://www.mpich.org/static/docs/v3.1/www3/MPI_Win_attach.html,  for MPI
3,  The API MPI_Win_attach is supported :





int MPI_Win_attach(MPI_Win win, void *base, MPI_Aint size)



It allows multiple (but non-overlapping) memory regions to be attached to
the same window, after the window is created. Therefore, I should be able
to have multiple such “attach” calls for the same window, with different
“base” address to be specified in each attach call.

If that is the case, when I issue the MPI_Get, how can I specify which
“base address” on the window is what I need to fetch the data?  As MPI_get
has the window handle to be one of the input parameters, but not“base
address”.  The base address should be resolved by the target process from
the registered window handle.

So my question is: how can  MPI_Get  handle the situation where multiple
memory regions are attached to the same window?

Thank you!


-- 
Lokah samasta sukhinobhavanthu

Thanks,
Madhurima

[OMPI users] openib component not available

[madhurima madhunapanthula]

Hi,


I am trying to setup openmpi 1.8.1 on a system with infiniband.

The configure option I am using is

./configure  --enable-mpi-thread-multiple


After installation,  it is not showing any openib BTL component when I use
the command:
'ompi_info --param btl openib'


On the same machine, I have also installed openmpi 1.6.5. When i issue the
command 'ompi_info --param btl openib' from this setup, it lists many
openib components.

Should I use any flag/option to enable openib in openmpi1.8.1?



-- 
Lokah samasta sukhinobhavanthu

Thanks,
Madhurima

[OMPI users] Hamster

[madhurima madhunapanthula]

Hi,

I came across Hamster while reading some article on Hadoop + OpenMPI
please let me know if the sources of Hamster are available for build and
testing.

-- 
Lokah samasta sukhinobhavanthu

Thanks,
Madhurima

[OMPI users] Segmentation Fault

[madhurima madhunapanthula]

Hi,

Iam trying to link the jumpshot libraries with the graph500 (mpi_tuned_2d
sources).
After linkin the libraries and executing mpirun with the
graph500_mpi_custome_n binaries Iam getting the following segmenation fault.
I have no clue as to where the issue is. When I dont link the jumpshot
libraries with the Graph500(mpi_tuned_2d) sources the binaries run without
segfault error

[mercado-26:14493] *** Process received signal ***
[mercado-26:14493] Signal: Segmentation fault (11)
[mercado-26:14493] Signal code: Address not mapped (1)
[mercado-26:14493] Failing at address: 0x694930
[mercado-26:14493] [ 0] /lib64/libpthread.so.0() [0x30a5a0f710]
[mercado-26:14493] [ 1] ./graph500_mpi_custom_8(MPI_Testany+0xfc) [0x425d3f]
[mercado-26:14493] [ 2]
./graph500_mpi_custom_8(_Z7run_bfslPlRK12bfs_settings+0x1619) [0x41d909]
[mercado-26:14493] [ 3] ./graph500_mpi_custom_8(main+0xcd7) [0x40fef7]
[mercado-26:14493] [ 4] /lib64/libc.so.6(__libc_start_main+0xfd)
[0x30a521ed1d]
[mercado-26:14493] [ 5] ./graph500_mpi_custom_8() [0x40eca9]
[mercado-26:14493] *** End of error message ***
Please guide me in fixing this issue

-- 
Lokah samasta sukhinobhavanthu

Thanks,
Madhurima

[OMPI users] OpenMpi-java Examples

[madhurima madhunapanthula]

hi,

Iam new to OpenMPI. I have installed the java bindings of OpenMPI and
running some samples in the cluster.
iam interested in some samples using THREAD_SERIALIZED and THREAD_FUNNLED
fields in OpenMPI. please provide me some samples.

-- 
Lokah samasta sukhinobhavanthu

Thanks,
Madhurima