LAM: How to optimize LAM on SMP machine

Hi,

I'm running benchmark code on single node of 4 cores with
LAM-7.1.3.
I'm wondering if LAM can be optimized to make use of the SMP
shared memory 
feature. Anyone has good idea?

--Yuan


Yuan Wan
-- 
Unix Section
Information Services Infrastructure Division
University of Edinburgh

tel: 0131 650 4985
email: ywaned.ac.uk

2032 Computing Services, JCMB
The King's Buildings,
Edinburgh, EH9 3JZ

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ywaned.ac.uk wrote:
> Hi,
> 
> I'm running benchmark code on single node of 4 cores
with LAM-7.1.3.
> I'm wondering if LAM can be optimized to make use of
the SMP shared memory 
> feature. Anyone has good idea?
With a standard lam build, shared memory is used
automatically.  The -O 
run-time flag can be used to avoid byte reversing the
messages, when all 
nodes are little-endian.  Otherwise, there is a define to
use at build 
time, to use shifts for the byte reversing, which is much
faster.
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