Question

我使用openmpi和linux mint，请考虑以下示例：

#include <boost/mpi.hpp>
#include <iostream>
#include <string>
#include <boost/serialization/string.hpp>

namespace mpi = boost::mpi;
using namespace std;

int main()
{
    mpi::environment env;
    mpi::communicator world;

    if (world.rank() == 0)
    {
        world.send(1, 0, std::string("3664010"));
        while (1)
        {
             world.send(1, 0, std::string("3664012"));
             sleep(1);
        }
     }
     else
     {
        std::string msg;
        string dst;
        bool first = true;

        while (1)
        {
            world.recv(0, 0, msg);
            if (first) {dst = msg;first = false;}
            std::cout << "slave received=" << dst << " msg=" << msg << std::endl;
        }
     }

    return 0;
}

编译：mpic ++ -std = c ++ 0x test.cc -lboost_serialization -lboost_mpi
运行：mpirun -np 2 ./a.out
输出： slave received = 3664010 msg = 3664010
slave received = 3664012 msg = 3664012
slave received = 3664012 msg = 3664012

只有当所有消息长度相等时才会重现Bug。例如，如果第二条消息是＆＃34; 3664012及更多＆＃34;一切正常：
slave received = 3664010 msg = 3664010
奴隶收到= 3664010 msg = 3664012及更多
奴隶收到= 3664010 msg = 3664012及更多
奴隶收到= 3664010 msg = 3664012及更多

它看起来像dst和msg使用相同的内存缓冲区。并且只有当字符串长度不同时，它们才开始使用不同的内存缓冲区。我使用以下解决方法（msg = string（））告诉编译器msg已更改：

std::cout << "slave received=" << dst << " msg=" << msg << std::endl;
msg = string();

它工作正常。还有更好的解决方案吗？谢谢。

Answer 1

通过使用没有字符串牛的gcc c ++ 11来解决问题

boost :: mpi和boost ::序列化错误

1 个答案: