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Subject: Re: [OMPI users] Shared Memory Performance Problem.
From: Michele Marena (michelemarena_at_[hidden])
Date: 2011-03-27 07:26:45


This is my machinefile
node-1-16 slots=2
node-1-17 slots=2
node-1-18 slots=2
node-1-19 slots=2
node-1-20 slots=2
node-1-21 slots=2
node-1-22 slots=2
node-1-23 slots=2

Each cluster node has 2 processors. I launch my application with 3
processes, one on node-1-16 (manager) and two on node-1-17(workers). Two
processes on node-1-17 communicate each other.

2011/3/27 Michele Marena <michelemarena_at_[hidden]>

> Hi,
> My application performs good without shared memory utilization, but with
> shared memory I get performance worst than without of it.
> Do I make a mistake? Don't I pay attention to something?
> I know OpenMPI uses /tmp directory to allocate shared memory and it is in
> the local filesystem.
>
> I thank you.
> Michele.
>