//mpicxx test-boost.cpp -o test-boost -I /home1/mutlu/boost/include/boost-1_37/ /home1/mutlu/boost/lib/libboost_mpi-gcc41-mt-1_37.a

#include <boost/mpi/environment.hpp>

#include <boost/mpi/communicator.hpp>

#include <boost/mpi/collectives.hpp>

#include <boost/thread/mutex.hpp>

#include <iostream>

#include <vector>

#define MASTER 0

namespace mpi = boost::mpi;

using namespace std;

struct x{

string name;

int age;

};

int arraySize = 23;

void silly_func(int *px, int sz){

for(int i = 0; i < sz; i++)

px[i] = 100;

}

int main(int argc, char* argv[])

{

mpi::environment env(argc, argv);

mpi::communicator world;

int m_mySize, w_mySize, kk,i;

int *myValues;

vector<int> a;

vector<int> aa;

for(int i = 0; i < arraySize; i++) a.push_back(i);

w_mySize = arraySize / world.size();

if (world.rank() == MASTER){

m_mySize = arraySize / world.size() + arraySize % world.size();

myValues = (int *) malloc(m_mySize);

}

else{

myValues = (int *) malloc(w_mySize);

}

if (world.rank() == MASTER)

scatter(world, a, myValues, w_mySize, 0);

else

scatter(world, a, myValues, w_mySize, 0);

if (world.rank() == MASTER) // append the remaining elements

{

for (i = w_mySize * world.size(), kk = 0; i < arraySize; i++, kk++)

myValues[w_mySize + kk] = a[w_mySize * world.size() + kk];

}

cout << "my rank is " << world.rank() << " and my values are" << endl;

if (world.rank() == MASTER)

for (int i = 0; i < m_mySize; i++)

cout << myValues[i] << endl;

if (world.rank() != MASTER)

for (int i = 0; i < w_mySize; i++)

cout << myValues[i] << endl;

if (world.rank() != MASTER)

silly_func(myValues, w_mySize);

else

silly_func(myValues, m_mySize);

if (world.rank() == MASTER)

gather(world, myValues, m_mySize, aa, 0);

else

gather(world, myValues, w_mySize, aa, 0);

if (world.rank() == MASTER){

cout << "======================="<< endl;

for(int i = 0; i < aa.size(); i++)

cout << aa[i] << endl;

}

and error file is

[ceng3:23784] *** Process received signal ***

[ceng3:23784] Signal: Segmentation fault (11)

[ceng3:23784] Signal code: Address not mapped (1)

[ceng3:23784] Failing at address: (nil)

[ceng3:23784] [ 0] /lib64/libpthread.so.0 [0x30e100de80]

[ceng3:23784] [ 1] /lib64/libc.so.6(memcpy+0x37) [0x30e047a107]

[ceng3:23784] [ 2] /usr/mpi/gcc/openmpi-1.2.8/lib64/libmpi.so.0(ompi_ddt_copy_content_same_ddt+0xe8) [0x2b180e3b5618]

[ceng3:23784] [ 3] /usr/mpi/gcc/openmpi-1.2.8/lib64/libmpi.so.0(ompi_ddt_sndrcv+0x3f3) [0x2b180e3b3ef3]

[ceng3:23784] [ 4] /usr/mpi/gcc/openmpi-1.2.8/lib64/openmpi/mca_coll_basic.so(mca_coll_basic_gather_intra+0xd2) [0x2b18142f20a2]

[ceng3:23784] [ 5] /usr/mpi/gcc/openmpi-1.2.8/lib64/libmpi.so.0(PMPI_Gather+0x19b) [0x2b180e3c7ccb]

[ceng3:23784] [ 6] test-boost(_ZN5boost3mpi6detail11gather_implIiEEvRKNS0_12communicatorEPKT_iPS6_iN4mpl_5bool_ILb1EEE+0x6b) [0x414b29]

[ceng3:23784] [ 7] test-boost(_ZN5boost3mpi6gatherIiEEvRKNS0_12communicatorEPKT_iPS5_i+0x50) [0x414c82]

[ceng3:23784] [ 8] test-boost(_ZN5boost3mpi6gatherIiEEvRKNS0_12communicatorEPKT_iRSt6vectorIS5_SaIS5_EEi+0x42) [0x414ce8]

[ceng3:23784] [ 9] test-boost(main+0x342) [0x40f62c]

[ceng3:23784] [10] /lib64/libc.so.6(__libc_start_main+0xf4) [0x30e041d8b4]

[ceng3:23784] [11] test-boost(__gxx_personality_v0+0x141) [0x40f199]

[ceng3:23784] *** End of error message ***

mpirun noticed that job rank 0 with PID 23784 on node ceng3-ib exited on signal 11 (Segmentation fault).