charmm scalability on 2.4 kernels

Peter H. Koenig Peter.Koenig at phys.uni-paderborn.de
Wed Jan 16 05:36:50 EST 2002


 Hello,
 
 Bogdan Costescu wrote:
 
 > That is actually what I have observed during the last 3 years of running
 > different versions of kernels, MPI libraries and CHARMM. Running using
 > only one transport (TCP or shared mem) is always better than mixing them,
 > f.e (using LAM-6.5.6):
 >
 > CPUs    nodes   real time (min)         transports
 > 4       4       5.95                    TCP
 > 4       2       7.08                    TCP+USYSV
 >
 > As you can see, the difference is quite significant.
 
 Do you also have the numbers for 2 dual nodes using only TCP ?
 
 Peter Koenig
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