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

Subject: Re: [Boost-users] [mpi] failed test and other issues
From: Nick Collier (nick.collier_at_[hidden])
Date: 2009-06-12 14:12:55

I've tested a bit more and it looks like this error only occurs when  
using a process count > 3. That is, mpirun -np 2 or 3 works fine, but  
with > 4 the error below occurs. This makes me think it is a mpi  
rather than a serialization issue.

Nick

On Jun 11, 2009, at 5:00 PM, Matthias Troyer wrote:

> 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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