[OMPI users] Communication round-trip time

Hi, Have anyone know about MPI Program use to measure communication round-trip time on Cluster ( like ping command on network) That is the program have each process run on each node on Cluster. Then it use MPI to calculate the communication round-trip time among nodes. Thanks

[OMPI users] MPI_Recv operation time

Hi, My objective is I want to calculate the time perform by MPI_Send & MPI_Recv . In case MPI_Send, i can put the timer before the MPI_Send and after its. like this " t1=MPI_Wtime(), MPI_Send t2= MPI_Wtime tsend= t2 -t1; it mean when the message go to the system buffer, the control return to

[OMPI users] MPI_Issend non-blocking send in Synchronous Mode

Hi, I have some problem in MPI Function MPI_Issend. That is non-blocking send in synchronous mode. That is, when start this function, the send process send the request-to-send to the destination process. Then the receiver send back a permission-to-send message . And then the sender now sends t

[OMPI users] MPI Tests

Hi, My question is " In MPI community , Is there a program like this ? " Describe about this program: I have the cluster to run MPI Program. But before running, I want to check the connection and to measure some performance features of this system like latency, bandwidth ... It means i c

[OMPI users] Communication Round-trip time

Hi, I'm currently doing MPI project in NUS University. My professor require me make a monitoring tool to check the connection among processes in Cluster. And also measure communication round-trip time. My solution is : 1. At the source process : start MPI_Send 2. At the destination process :