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补全MPI矩阵乘程序结尾代码

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Jolllly
2021-11-10 23:04:03 +08:00
parent f22e1a9635
commit 785d4a385c
1 changed files with 15 additions and 0 deletions
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15
20-parallel-programming.Rmd
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@@ -777,6 +777,21 @@ int main(int argc, char **argv)
C[i*n+j]=0;
for(k=0;k<n;k++)
C[i*n+j]+=A[i*n+k]*B[k*n+j];
}
} else {
//其他进程接收数据，计算结果，发送给主进程
MPI_Recv(B,n*n,MPI_DOUBLE,0,0,MPI_COMM_WORLD,&status);
MPI_Recv(A+(ID-1)*line*n,line*n,MPI_DOUBLE,0,1,MPI_COMM_WORLD,&status);
for(i=(ID-1)*line;i<ID*line;i++)
for(j=0;j<n;j++) {
C[i*n+j]=0;
for(k=0;k<n;k++)
C[i*n+j]+=A[i*n+k]*B[k*n+j];
}
MPI_SEND(C+(num_procs-1)*line*n,line*n,MPI_DOUBLE,0,2,MPI_COMM_WORLD);
}
MPI_Finalize();
return 0;
}
```