"ANALYSIS OF TIME WARP ON A 32,768 PROCESSOR IBM BLUE GENE/L SUPERCOMPUTER"
A. O. Holder, C. D. Carothers
To appears in Proceedings of the 2008 European Modeling and Simulation Symposium (EMSS '08),
Campora San Giovanni, Amantea (CS), Italy
ABSTRACT
The aim of our work is to investigate the performance and overall
scalability of an optimistic discrete-event simulator on a Blue Gene/L
supercomputer. We find that strong scaling out to 16,384 processors is
possible. In terms of event-rate, we observed 853 million events per second
on 16,384 processors for the PHOLD benchmark. This is 1.5
times faster than any previously reported PDES synchronization protocol for
PHOLD executing on a Blue Gen/L supercomputer (e.g. conservative, optimistic
or hybrid). Additionally, we observed 2.47 billion events per second for a
PCS telephone network model when executed on 32,768 processors. To the best
of our knowledge, this is the first multi-billion event rate achieved for
any Time Warp model executing on a Blue Gene/L supercomputer.