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pdtran upgrade

t_r_hopkinskent_ac_u
Beginner
‎05-05-2009 07:30 AM
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In the list of upgrades to the latest release of the MKL (10.1 Update 2) it mentions

Fixed a load-balancing problem in the pdtran ScaLAPACK function by improving the communications
scheme improving performance by up to 3 times 

Can anyone give me details of the changes that were made to the source code as I'd like to update my version
of this routine to see if it gets rid of a problem I seem to be having when I try and transpose very large matrices
under MPI.

Many thanks,

Tim
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Andrei_Moskalev__Int
Beginner
‎05-06-2009 10:53 PM
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Some ourchanges were based on ideas described in the following paper: http://users.cs.cf.ac.uk/David.W.Walker/LINALG/transpose95.html
Also therearesome problem for big sizes in current implementation, for example instability of performance.
Try to use ITAC - Intel Trace Analyzer and Collector for obtaining data on your implementation load balance.

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