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wlw515

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虫号: 4119108
注册: 2015-10-04
专业: 爆炸与冲击动力学

[求助] 并行初学者遇到了点问题，已经被困很久了，希望大家帮助一下，不胜感激已有1人参与

我现在想在从c++中实现并行，然后开始接触这一块，但是遇到了点问题。具体的程序如下：
if(MyPID==0)
{
  N=6;
MPI_Bcast(&N,1,MPI_INT,0,MPI_COMM_WORLD);

}
MPI_Bcast(&N,1,MPI_INT,0,MPI_COMM_WORLD);
   Epetra_Map Map(N,0,Comm);
   cout<<Map;
  这段程序我就是想验证一下广播可不可以使用，但是结果一直出错，显示这样的错误：
Number of Global Elements  = 6
Number of Global Points = 6
Maximum of all GIDs       = 5
Minimum of all GIDs       = 0
Index Base                = 0
Constant Element Size    = 1

Number of Local Elements = 2
Number of Local Points    = 2
Maximum of my GIDs       = 1
Minimum of my GIDs       = 0

      MyPID          Local Index       Global Index
         0                0                0
         0                1                1
Fatal error in PMPI_Barrier: Message truncated, error stack:
PMPI_Barrier(425)...................: MPI_Barrier(MPI_COMM_WORLD) failed
MPIR_Barrier_impl(332)..............: Failure during collective
MPIR_Barrier_impl(327)..............:
MPIR_Barrier(292)...................:
MPIR_Barrier_intra(150).............:
barrier_smp_intra(111)..............:
MPIR_Bcast_impl(1452)...............:
MPIR_Bcast(1476)....................:
MPIR_Bcast_intra(1287)..............:
MPIR_Bcast_binomial(239)............:
MPIC_Recv(353)......................:
MPIDI_CH3U_Request_unpack_uebuf(568): Message truncated; 4 bytes received but buffer size is 1
Fatal error in PMPI_Barrier: Message truncated, error stack:
PMPI_Barrier(425)...................: MPI_Barrier(MPI_COMM_WORLD) failed
MPIR_Barrier_impl(332)..............: Failure during collective
MPIR_Barrier_impl(327)..............:
MPIR_Barrier(292)...................:
MPIR_Barrier_intra(150).............:
barrier_smp_intra(111)..............:
MPIR_Bcast_impl(1452)...............:
MPIR_Bcast(1476)....................:
MPIR_Bcast_intra(1287)..............:
MPIR_Bcast_binomial(239)............:
MPIC_Recv(353)......................:
MPIDI_CH3U_Request_unpack_uebuf(568): Message truncated; 4 bytes received but buffer size is 1
Fatal error in PMPI_Barrier: Other MPI error, error stack:
PMPI_Barrier(425).......: MPI_Barrier(MPI_COMM_WORLD) failed
MPIR_Barrier_impl(332)..: Failure during collective
MPIR_Barrier_impl(327)..:
MPIR_Barrier(292).......:
MPIR_Barrier_intra(150).:
barrier_smp_intra(111)..:
MPIR_Bcast_impl(1452)...:
MPIR_Bcast(1476)........:
MPIR_Bcast_intra(1287)..:
MPIR_Bcast_binomial(310): Failure during collective
我很想知道广播在这里到底哪里除了问题，还请大家帮忙解答一下

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