LAM/MPI General User's Mailing List Archives

From: Artur Tyliszczak (atyl_at_[hidden])
Date: 2007-09-26 12:47:09

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• Reply: Tim Prince: "Re: LAM: mpirun on dual cores Opterons 8214HE"
• Reply: Davide Cesari: "Re: LAM: mpirun on dual cores Opterons 8214HE"

Dear All,

We have 8 dual cores Opterons 8214HE cluster (total: 32 cores).
If I run a job using mpirun (mpirun -np 4 ./jobname) how can I know
whether my job is running on 2 physical processors (4 cores) or
separate 4 processors (also 4 cores but from different processors)?

Is is there any way to chose one of the above option by some mpirun options?
What is more efficient: 2 cores on 2 processors OR 4 cores on 4 separate
processors?

Thank you in advance.
Artur T.

• Next message: Alysson Nunes Diógenes: "LAM: 3D STL Vector"
• Previous message: McCalla, Mac: "Re: LAM: error using complex numbers array"
• Next in thread: Tim Prince: "Re: LAM: mpirun on dual cores Opterons 8214HE"
• Reply: Tim Prince: "Re: LAM: mpirun on dual cores Opterons 8214HE"
• Reply: Davide Cesari: "Re: LAM: mpirun on dual cores Opterons 8214HE"