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Questions tagged [boost-mpi]

one of the Boost libraries, a C++-style wrapper around the Message Passing Interface (MPI) library for high-performance distributed computing.

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MPIrun crashing with simple code

I'm trying to generate code that uses MPI to behave roughly similar to a program with dependencies. Everything works fine if I use a number of processors (e.g. mpirun -np X) where X is greater than the number of tasks I'm trying to model (e.g.…
Hamy
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how to interpret the error codes of boost::mpi?

How to make sense of the boost::mpi error code? For instance, what does error code 834983239 mean? ... mpi::communicator world; mpi::request req = world.isend(1, 1, std::string("hello")); while(!req.test()) { …
Ammar
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message synchronization with boost::mpi send/recv?

I call mpirun with "-np 2". I'm referring to the process with rank 0 as "master" and the process with rank 1 as "slave". Goal: master occasionally sends a message to slave such as mpi::send(1, UPDATE, data);. Other message types include DIE,…
Ammar
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boost mpi assertion failing

I am using boost-mpi and I am getting an error that I am having a hard time figuring out. I am using a recv call and an assertion in the boost code fails: void boost::mpi::binary_buffer_iprimitive::load_impl(void *, int): Assertion…
Kyle
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Does a mpi request finish if recv and send is matched

Is it enough to check only one request object from two matching non-blocking send and recv operations. This would be great as this would reduce the effort to handle the request objects in my program. Here a small example with boost mpi: #include…
tune2fs
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c++ boost MPI & threading - serialize errors: Address not mapped

I'm stumped. all_gather works for primitives (e.g. int) but fails even for simple STL containers. valgrind claims that the container was not allocated/initialized, but that doesn't seem right. In summary: I do some multi-threading with openMP,…
cmo
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Grab a "sub"-vector and "concatenate" vectors

So I am writing a parallel program (boost.mpi) and I want to pass pieces of a vector (as in std::vector) that can be assembled to make a whole vector. In order to do this, I want to be able to do 2 things: grab a piece of a vector- ie say a vector…
Kyle
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Why does virtual destructor cause segmentaion fault when dealing with user-defined MPI types?

I'm using the example provided with Boost.MPI documentation found here. I have a bit modified these two classes and as soon as I add destructor to this class, I will get segmentation fault during receiving a std::vector. How can I…
MA19
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Cannot setup MPI wrappers - fatal error C1083: Cannot open include file: 'mpi.h': No such file or directory

I am having issues setting up MPI with the Boost C++ Library. I suspect I'm not setting up my MPI wrappers correctly. However, I'm likely wrong! I cannot run: mpicc -show or mpicc -showme. Thus, I cannot find my correct library path for my MPI…
Ben Redjepi
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Seg fault for a simple MPI code during Remote Memory access window creation

I am working on an MPI code in which I am trying to use one-sided communication (RMA). I am creating a window using MPI_Win_create. The code works correctly and gives correct results but still 1 processor exits with a segmentation fault and I am…
Yash
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install Boost.MPI in a directory without administration privileges

How can I install Boost.MPI in my home directory without having any administrative privileges on the Unix system I am working on?
Tarek
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Error during compiling of simple boot_mpi scatter program: no serialize element

i am currently evalutating a simple program that allows so scatter an array/vector of lines/strings over a number of processes. I have created a simple test program which i am not able to compile. I am hoping someone can help me finding a solution.…
Oliver
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MPI: how to limit access to file system?

We have MPI based on 4 clusters with 16 cores each. We have a folder called notRestricted. We want to limit access of the application we run with mpiexec to file system - limit its access to write only to that one folder on that one machine we ran…
Rella
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Preserve original ranks in new group

After a new group is created, the lowest rank id is zero. How can I preserve the original ranks of processors? #include namespace bmpi = boost::mpi; int main() { MPI_Init(NULL, NULL); bmpi::communicator comm; …
Shibli
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C++ MPI, using multiple node, first reduce at node level, then reduce to the head node

I use 12 nodes windows HPC cluster (each with 24 cores) to run a C++ MPI program (use Boost MPI). One run with the MPI reduce, one comment out MPI reduce (for speed test only). The run time is 01:17:23 and 01:03:49. It seems to me that MPI reduce…
user11594134
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