Re: [Boost-users] [mpi] failed test and other issues

Subject: Re: [Boost-users] [mpi] failed test and other issues
From: Matthias Troyer (troyer_at_[hidden])
Date: 2009-06-11 17:00:45

Have you tried whether your code van serialize the same vector of  
pointers into a file and deserialize it successfully again? That test  
helps decide whether this is an MPI or a serialization issue.

Matthias

On Jun 11, 2009, at 10:13 AM, Nick Collier <nick.collier_at_[hidden]>  
wrote:

> Hi,
>
> I'm using boost-1.39.0 with openMpi 1.3.2 on OSX 10.5.7. I'm getting  
> some strange behavior when sending and receiving a vector of  
> pointers between processes. The received pointer addresses are  
> sometimes invalid. I'm not using the skeleton content code, just  
> sending and receiving the vector. Some output:
>
> [2] processing edges from 1
> [2] unpacking edge 0x834810
> [2] unpacking edge 0x834810
> [0] processing edges from 2
> [0] unpacking edge 0x834ec0
> [0] unpacking edge 0x834ec0
> [2] processing edges from 3
> [2] unpacking edge 0x8346c0
> [2] unpacking edge 0x8346c0
> [2] processing edges from 0
> [2] unpacking edge 0x1
> [2] unpacking edge 0x1
>
> The hex value is the pointer address, and obviously doing anything  
> with the edge with the weird address causes the app to crash. I  
> can't see that I'm doing anything wrong (although of course that's a  
> possibility) and so I thought I'd run the boost mpi tests. The  
> skeleton_content_test fails consistently with the following output:
>
> Broadcasting integer list skeleton from root 0...OK.
> Broadcasting integer list content from root 0...OK.
> Broadcasting reversed integer list content from root 0...OK.
> ../../../boost/test/minimal.hpp(123): exception "memory access  
> violation at address: 0x974bfd1c: non-existent physical address"  
> caught in function: 'int main(int, char**)'
>
> **** Testing aborted.../../../boost/test/minimal.hpp(123): exception  
> "memory access violation at address: 0x974bfd1c: non-existent  
> physical address" caught in function: 'int main(int, char**)'
>
> **** Testing aborted.
> **** 1 error detected
> ../../../boost/test/minimal.hpp(123): exception "memory access  
> violation at address: 0x974bfd1c: non-existent physical address"  
> caught in function: 'int main(int, char**)'
>
> **** Testing aborted.
> **** 1 error detected
> ../../../boost/test/minimal.hpp(123): exception "memory access  
> violation at address: 0x974bfd1c: non-existent physical address"  
> caught in function: 'int main(int, char**)'
>
> **** Testing aborted.
> **** 1 error detected
> ../../../boost/test/minimal.hpp(123): exception "memory access  
> violation at address: 0x974bfd1c: non-existent physical address"  
> caught in function: 'int main(int, char**)'
>
> **** Testing aborted.
> **** 1 error detected
>
> **** 1 error detected
> ../../../boost/test/minimal.hpp(123): exception "memory access  
> violation at address: 0x974bfd1c: non-existent physical address"  
> caught in function: 'int main(int, char**)'
>
> **** Testing aborted.
> **** 1 error detected
>
> I'm not sure if this is related to my problem but the memory issues  
> made me wonder.
>
> Any help is appreciated,
>
> thanks,
>
> Nick
>
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