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Subject: [OMPI users] Pinned memory
From: Gabriele Fatigati (g.fatigati_at_[hidden])
Date: 2009-01-29 06:00:06


Dear OpenMPI Developer,
i have a doubt regards mpi_leave_pinned parameter. Suppose i have a simple for:

for( int i=0; i< 100; i++)
  MPI_Reduce(a, b, .......)

My question is: if i set mpi_leave_pinned= 1, buffer memories are
pinned in the entire process, or just into the for cycle?

When the cycle is finished, a and b memories, are unregistrered?

Thanks in advance.

-- 
Ing. Gabriele Fatigati
Parallel programmer
CINECA Systems & Tecnologies Department
Supercomputing Group
Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
www.cineca.it                    Tel:   +39 051 6171722
g.fatigati [AT] cineca.it