[molpro-user] TCGMSG or MPI

Nick Wilson WilsonNT at Cardiff.ac.uk
Fri Oct 15 10:09:19 BST 2004

Dear Martyn,

It will depend on the interconnect. If you're using a single gigabit 
ethernet switch then you will probably see little difference between 
tcgmsg and mpich. If you have a more expensive interconnect such as 
myrinet then you should be building global arrays on top of mpi.

Running the benchmark suite will give you hard numbers for the different 

Best wishes,
Nick Wilson

Wheeler, Dr M.D. wrote:
> Could someone enlighten me as to which is the best to use out of MPI or TCGMSG on an opteron linux system?
> Thanks in advance
> Martyn
> ----------------------------------------------
> Dr. Martyn D. Wheeler
> Department of Chemistry
> University of Leicester
> University Road
> Leicester, LE1 7RH, UK.
> Tel (office): +44 (0)116 252 3985
> Tel (lab):    +44 (0)116 252 2115
> Fax:          +44 (0)116 252 3789
> Email:        martyn.wheeler at le.ac.uk
> http://www.le.ac.uk/chemistry/staff/mdw10.html

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