support for MPI_IN_PLACE in [all]gather/scatter and allreduce #104 Open slayoo opened this issue Jun 25, 2023· 3 comments Comments Member slayoo commented Jun 25, 2023 See: https://www.open-mpi.org/doc/v3.0
int MPIAPI MPI_Allreduce( _In_opt_ const void *sendbuf, _Out_opt_ void *recvbuf, _In_ int count, _In_ MPI_Datatype datatype, _In_ MPI_Op op, _In_ MPI_Comm comm ); 參數sendbuf [in, optional] 要傳送至群組中所有進程之資料的指標。 緩衝區中元素的數目和資料類型是在計數和資料類...
program test_allreduce use mpi implicit none integer :: status, rank call MPI_Init(ierror=status) call MPI_COMM_RANK(MPI_COMM_WORLD,rank,ierror=status) call MPI_ALLReduce(MPI_IN_PLACE,rank,1,MPI_INTEGER,MPI_MAX,MPI_COMM_WORLD,ierror=status) call MPI_Finalize(ierror...
And I noticed that the first strange number 1140850688 is the value of MPI_IN_PLACE defined in mpif.h. Other than that I have completely no clue of it. I cannot simplify it to a small test program since when I test MPI_Allreduce with the same size array in a simple code, it works...
发现在MPI_Allreduce使用MPI_IN_PLACE变量时，逻辑变量pass_local经过归约后结果为.false.，如果不使用...
intMPIAPIMPI_Iallreduce( _In_opt_constvoid*sendbuf, _Out_opt_void*recvbuf, _In_intcount, _In_ MPI_Datatype datatype, _In_ MPI_Op op, _In_ MPI_Comm comm, _Out_ MPI_Request *request ); パラメーター sendbuf[in, optional] ...
intMPIAPIMPI_Allreduce( _In_opt_constvoid*sendbuf, _Out_opt_void*recvbuf, _In_intcount, _In_ MPI_Datatype datatype, _In_ MPI_Op op, _In_ MPI_Comm comm ); 參數 sendbuf[in, optional] 要傳送至群組中所有進程之資料的指標。 緩衝區中元素的數目和資料類型是在計數和資料類型參數中指定。
intMPIAPIMPI_Iallreduce( _In_opt_constvoid*sendbuf, _Out_opt_void*recvbuf, _In_intcount, _In_ MPI_Datatype datatype, _In_ MPI_Op op, _In_ MPI_Comm comm, _Out_ MPI_Request *request ); 参数 sendbuf[in, 可选] 指向要发送到组中的所有进程的数据的指针。 缓冲区中元素的数量和数据...
program test_allreduce use mpi implicit none integer :: status, rank call MPI_Init(ierror=status) call MPI_COMM_RANK(MPI_COMM_WORLD,rank,ierror=status) call MPI_ALLReduce(MPI_IN_PLACE,rank,1,MPI_INTEGER,MPI_MAX,MPI_COMM_WORLD,ierror=status) call MPI_Finalize(ierror=sta...
int MPIAPI MPI_Allreduce( _In_opt_ const void *sendbuf, _Out_opt_ void *recvbuf, _In_ int count, _In_ MPI_Datatype datatype, _In_ MPI_Op op, _In_ MPI_Comm comm ); 參數 sendbuf [in, optional] 要傳送至群組中所有進程之資料的指標。 緩衝區中元素的數目和資料類型是在計數和資料...