Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: [OMPI users] Decision map for MPI collective operations
From: Andy Georgi (Andy.Georgi_at_[hidden])
Date: 2008-04-19 03:41:24


hello all,

i want to measure the time needed for collective operations on a cluster
by using ompi 1.2.5. i read that the algorithm which is used depends on
msgsize and/or commsize and ompi constructs a decision map for the
collective on the system. now my question:

where can i find these decision map for my system?

i'm no sysadmin, but i hope there is a way to get this information
anyway ;-).

regards,

andy

-- 
Dresden University of Technology
Center for Information Services
and High Performance Computing (ZIH)
D-01062 Dresden
Germany
Phone:    (+49) 351/463-38783
Fax:      (+49) 351/463-38245
e-mail: Andy.Georgi_at_[hidden]
WWW:    http://www.tu-dresden.de/zih