What is the use of status of MPI_Isend obtained using MPI_Wait?
Case: 1. What is the use of status obtained using MPI_Wait()
if(rank==0)
MPI_Isend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD, &request0);
if(rank==1)
MPI_Recv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD);
if(rank==0)
MPI_Wait(&request0, &status);
// Can i use status here to do something?
MPI_Finalize();
Case:2. Use of status is clear here (Just added for comparison)
if(rank==0)
MPI_Ssend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD);
if(rank==1)
MPI_Irecv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD, &request1);
if(rank==1)
MPI_Wait(&request1, &status);
printf("The source is %d", status.MPI_SOURCE);
MPI_Finalize();
c mpi intel-mpi
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
add a comment |
Case: 1. What is the use of status obtained using MPI_Wait()
if(rank==0)
MPI_Isend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD, &request0);
if(rank==1)
MPI_Recv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD);
if(rank==0)
MPI_Wait(&request0, &status);
// Can i use status here to do something?
MPI_Finalize();
Case:2. Use of status is clear here (Just added for comparison)
if(rank==0)
MPI_Ssend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD);
if(rank==1)
MPI_Irecv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD, &request1);
if(rank==1)
MPI_Wait(&request1, &status);
printf("The source is %d", status.MPI_SOURCE);
MPI_Finalize();
c mpi intel-mpi
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
add a comment |
Case: 1. What is the use of status obtained using MPI_Wait()
if(rank==0)
MPI_Isend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD, &request0);
if(rank==1)
MPI_Recv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD);
if(rank==0)
MPI_Wait(&request0, &status);
// Can i use status here to do something?
MPI_Finalize();
Case:2. Use of status is clear here (Just added for comparison)
if(rank==0)
MPI_Ssend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD);
if(rank==1)
MPI_Irecv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD, &request1);
if(rank==1)
MPI_Wait(&request1, &status);
printf("The source is %d", status.MPI_SOURCE);
MPI_Finalize();
c mpi intel-mpi
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
Case: 1. What is the use of status obtained using MPI_Wait()
if(rank==0)
MPI_Isend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD, &request0);
if(rank==1)
MPI_Recv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD);
if(rank==0)
MPI_Wait(&request0, &status);
// Can i use status here to do something?
MPI_Finalize();
Case:2. Use of status is clear here (Just added for comparison)
if(rank==0)
MPI_Ssend(&buffer0, count, MPI_INT, 1, 0, MPI_COMM_WORLD);
if(rank==1)
MPI_Irecv(&buffer1, count, MPI_INT, 0, 0, MPI_COMM_WORLD, &request1);
if(rank==1)
MPI_Wait(&request1, &status);
printf("The source is %d", status.MPI_SOURCE);
MPI_Finalize();
c mpi intel-mpi
c mpi intel-mpi
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
edited Jan 19 at 10:28
Black Heart
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
asked Jan 19 at 9:24
Black HeartBlack Heart
124119
124119
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Generally MPI_Status is used to get the the following properties for received messages.
- rank of the sender, (
status.MPI_SOURCE) particularly relevant whenMPI_ANY_SOURCEwas used. - tag of the message, (
status.MPI_TAG) particularly relevant whenMPI_ANY_TAGwas used - element-count that was sent, which may differ from posted receive buffer, using
MPI_Get_count.
For send messages, you can use the status to test for MPI_Test_cancelled. Further, for functions that return multiple status, such as MPI_Waitall, in the case of errors, you can use status[i].MPI_ERROR. The main wait function will return MPI_ERR_IN_STATUS in this case.
If you do not need any of those, you may pass MPI_STATUS_IGNORE instead of a MPI_Status*.
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
1
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Generally MPI_Status is used to get the the following properties for received messages.
- rank of the sender, (
status.MPI_SOURCE) particularly relevant whenMPI_ANY_SOURCEwas used. - tag of the message, (
status.MPI_TAG) particularly relevant whenMPI_ANY_TAGwas used - element-count that was sent, which may differ from posted receive buffer, using
MPI_Get_count.
For send messages, you can use the status to test for MPI_Test_cancelled. Further, for functions that return multiple status, such as MPI_Waitall, in the case of errors, you can use status[i].MPI_ERROR. The main wait function will return MPI_ERR_IN_STATUS in this case.
If you do not need any of those, you may pass MPI_STATUS_IGNORE instead of a MPI_Status*.
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
1
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
add a comment |
Generally MPI_Status is used to get the the following properties for received messages.
- rank of the sender, (
status.MPI_SOURCE) particularly relevant whenMPI_ANY_SOURCEwas used. - tag of the message, (
status.MPI_TAG) particularly relevant whenMPI_ANY_TAGwas used - element-count that was sent, which may differ from posted receive buffer, using
MPI_Get_count.
For send messages, you can use the status to test for MPI_Test_cancelled. Further, for functions that return multiple status, such as MPI_Waitall, in the case of errors, you can use status[i].MPI_ERROR. The main wait function will return MPI_ERR_IN_STATUS in this case.
If you do not need any of those, you may pass MPI_STATUS_IGNORE instead of a MPI_Status*.
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
1
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
add a comment |
Generally MPI_Status is used to get the the following properties for received messages.
- rank of the sender, (
status.MPI_SOURCE) particularly relevant whenMPI_ANY_SOURCEwas used. - tag of the message, (
status.MPI_TAG) particularly relevant whenMPI_ANY_TAGwas used - element-count that was sent, which may differ from posted receive buffer, using
MPI_Get_count.
For send messages, you can use the status to test for MPI_Test_cancelled. Further, for functions that return multiple status, such as MPI_Waitall, in the case of errors, you can use status[i].MPI_ERROR. The main wait function will return MPI_ERR_IN_STATUS in this case.
If you do not need any of those, you may pass MPI_STATUS_IGNORE instead of a MPI_Status*.
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
Generally MPI_Status is used to get the the following properties for received messages.
- rank of the sender, (
status.MPI_SOURCE) particularly relevant whenMPI_ANY_SOURCEwas used. - tag of the message, (
status.MPI_TAG) particularly relevant whenMPI_ANY_TAGwas used - element-count that was sent, which may differ from posted receive buffer, using
MPI_Get_count.
For send messages, you can use the status to test for MPI_Test_cancelled. Further, for functions that return multiple status, such as MPI_Waitall, in the case of errors, you can use status[i].MPI_ERROR. The main wait function will return MPI_ERR_IN_STATUS in this case.
If you do not need any of those, you may pass MPI_STATUS_IGNORE instead of a MPI_Status*.
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
edited Jan 19 at 11:02
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
answered Jan 19 at 10:36
ZulanZulan
15.5k63070
15.5k63070
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
1
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
add a comment |
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
1
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
Can you please check Case:1 once more? I'm talking about the status in MPI_Wait(&request0, &status); This MPI_Wait was used to check out MPI_Isend.
– Black Heart
Jan 19 at 10:43
1
1
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
Sorry I wasn't clear. I updated the answer.
– Zulan
Jan 19 at 11:02
add a comment |
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