SC12 Home > SC12 Schedule > SC12 Presentation - Neural Circuit Simulation of Hodgkin-Huxley Type Neurons Toward Peta Scale Computers

SCHEDULE: NOV 10-16, 2012

When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.

Neural Circuit Simulation of Hodgkin-Huxley Type Neurons Toward Peta Scale Computers

SESSION: ACM Student Research Competition Poster Session

EVENT TYPE: ACM Student Research Competition

TIME: 5:15PM - 7:00PM

SESSION CHAIR: Torsten Hoefler

AUTHOR(S):Daisuke Miyamoto

ROOM:East Entrance

We ported and optimized simulation environment "NEURON" on K computer to simulate a insect brain as multi-compartment Hodgkin-Huxley type model. To use SIMD units of SPARC64VIIIfx (CPU of K computer), we exchanged the order of the compartment loop and the ion channel loop and apply sector caches. These tuning improved single core performance 340 MFLOPS/core to 1080 MFLOPS/core (about 7% efficiency). Spike exchange method of NEURON (MPI_Allgather) demands large amount of time in case of 10,000 cores or more and simple asynchronous point-to-point method (MPI_Isend) is not effective too, because of a large number of function calls and long distance of interconnect pathway. To tackle these problems, we adopted MPI/OpenMP hybrid parallelization to reduce interconnect communications and we developed a program to optimize location of neurons on calculation nodes in the 3D torus network. As a these results, we preliminary obtained about 70 TFLOPS with 196,608 CPU cores.

Chair/Author Details:

Torsten Hoefler (Chair) - ETH Zurich

Daisuke Miyamoto - University of Tokyo

Add to iCal  Click here to download .ics calendar file

Add to Outlook  Click here to download .vcs calendar file

Add to Google Calendarss  Click here to add event to your Google Calendar