提升MPI示例valgrind输出

Question

我正在尝试使用这个（http://theboostcpplibraries.com/boost.mpi-simple-data-exchange#ex.mpi_01）示例47.2来了解我自己使用valgrind运行的boost mpi代码的valgrind输出。以下代码运行正常，我得到了“99”。然而，当我用valgrind运行它时，我得到了“Syscall param write（buf）指向未初始化的字节”的投诉。

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

int main(int argc, char *argv[])
{
  boost::mpi::environment env{argc, argv};
  boost::mpi::communicator world;
  if (world.rank() == 0)
  {
    int i;
    world.recv(1, 16, i);
    std::cout << i << '\n';
  }
  else if (world.rank() == 1)
  {
    world.send(0, 16, 99);
  }
}

Syscall param write(buf) points to uninitialised byte(s)
at 0x37BEA0E6FD: ??? (in /lib64/libpthread-2.12.so)
.......
by 0x409B70: main (e47.2.cpp:6)
Address 0x7feffec48 is on thread 1's stack
.......