[R-sig-hpc] Rmpi: mpi.remote.exec(..., ret=FALSE) becomes blocking
Melwin
win at comets.de
Thu Jun 17 15:52:31 CEST 2010
Hi there,
I am calling computationally intensive complex functions on the slaves via
the Rmpi-function mpi.remote.exec (Win2000, R 2.10.0, Rmpi 0.5-7,
DeinoMPI).
Despite using the argument "ret=FALSE", these calls sometimes become
blocking, i.e. the program waits for all slaves to finish.
However, this happens infrequently, I couldn't reproduce this behaviour
consistently or with a simple example.
It seems that it happens only when the number of slaves is larger than 4.
Has anyone observed this behaviour before? Any suggestions for remedies?
Thanks in advance,
Melwin
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