Re: [OMPI users] busy wait in MPI_Recv

2010-10-20 Thread Brian Budge
; us...@open-mpi.org> Date: 10/19/2010 09:47 PM Subject: [OMPI users] busy wait in MPI_Recv Sent by: users-boun...@open-mpi.org -- Hi all - I just ran a small test to find out the overhead of an MPI_Recv call when no communication... ___

Re: [OMPI users] busy wait in MPI_Recv

2010-10-20 Thread Richard Treumann
users@lists.open-mpi.org Date: 10/19/2010 09:47 PM Subject: [OMPI users] busy wait in MPI_Recv Sent by: users-boun...@open-mpi.org Hi all - I just ran a small test to find out the overhead of an MPI_Recv call when no communication is occurring. It seems quite high. I noticed during my google

Re: [OMPI users] busy wait in MPI_Recv

2010-10-19 Thread Eugene Loh
Brian Budge wrote: Hi all - I just ran a small test to find out the overhead of an MPI_Recv call when no communication is occurring. It seems quite high. I noticed during my google excursions that openmpi does busy waiting. I also noticed that the option to -mca mpi_yield_when_idle seems no

[OMPI users] busy wait in MPI_Recv

2010-10-19 Thread Brian Budge
Hi all - I just ran a small test to find out the overhead of an MPI_Recv call when no communication is occurring. It seems quite high. I noticed during my google excursions that openmpi does busy waiting. I also noticed that the option to -mca mpi_yield_when_idle seems not to help much (in fac