[info] [Comp-neuro] New Paper: "Anatomy of a Cortical Simulator" at Supercomputing 2007

[Eugen Leitl]

----- Forwarded message from Dharmendra Modha <dmodha at gmail.com> -----

From: Dharmendra Modha <dmodha at gmail.com>
Date: Wed, 14 Nov 2007 23:14:56 -0800
To: connectionists at cs.cmu.edu, comp-neuro at neuroinf.org
Cc: 
Subject: [Comp-neuro] New Paper: "Anatomy of a Cortical Simulator" at
	Supercomputing 2007 
X-Mailer: Microsoft Office Outlook 12.0


   TITLE:  Anatomy of a Cortical Simulator


   AUTHORS:  Rajagopal Ananthanarayanan and Dharmendra S. Modha, IBM
   Almaden Research Center


   CONFERENCE: Supercomputing 2007, Reno, NV, Nov 10-16


   ABSTRACT:  Insights into brain's high-level computational principles
   will lead to novel cognitive systems, computing architectures,
   programming paradigms, and numerous practical applications. An
   important step towards this end is the study of large networks of
   cortical spiking neurons.


   We have built a cortical simulator, C2, incorporating several
   algorithmic enhancements to optimize the simulation scale and time,
   through: computationally efficient simulation of neurons in a
   clock-driven and synapses in an event-driven fashion; memory efficient
   representation of simulation state; and communication efficient
   message exchanges.


   Using phenomenological, single-compartment models of spiking neurons
   and synapses with spike-timing dependent plasticity, we represented a
   rat-scale cortical model (55 million neurons, 442 billion synapses) in
   8TB memory of a 32,768-processor BlueGene/L. With 1 millisecond
   resolution for neuronal dynamics and 1-20 milliseconds axonal delays,
   C2 can simulate 1 second of model time in 9 seconds per Hertz of
   average neuronal firing rate.


   In summary, by combining state-of-the-art hardware with innovative
   algorithms and software design, we simultaneously achieved
   unprecedented time-to-solution on an unprecedented problem size.


   LINK TO PDF FILE:
   http://sc07.supercomp.org/schedule/event_detail.php?evid=11063

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