SC13 Home > SC13 Schedule > SC13 Presentation - Tera-Scale 1D FFT with Low-Communication Algorithm on Intel Xeon Phi Coprocessors

SCHEDULE: NOV 16-22, 2013

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.

Tera-Scale 1D FFT with Low-Communication Algorithm on Intel Xeon Phi Coprocessors

SESSION: Performance Analysis of Applications at Large Scale

EVENT TYPE: Papers

TIME: 10:30AM - 11:00AM

SESSION CHAIR: Darren J. Kerbyson

AUTHOR(S):Jongsoo Park, Ganesh Bikshandi, Karthikeyan Vaidyanathan, Ping Tak Peter Tang, Pradeep Dubey, Daehyun Kim

ROOM:201/203

ABSTRACT:
This paper demonstrates the first tera-scale performance of Intel Xeon Phi coprocessors on 1D FFT computations. Applying a disciplined performance programming methodology of sound algorithm choice, valid performance model, and well-executed optimizations, we break the tera-flop mark on a mere 64 nodes of Xeon Phi and reach 6.7 TFLOPS with 512 nodes, which is 1.5x than achievable on a same number of Intel Xeon nodes. It is a challenge to fully utilize the compute capability presented by many-core wide-vector processors for bandwidth-bound FFT computation. We leverage a new algorithm, Segment-of-Interest FFT, with low inter-node communication cost, and aggressively optimize data movements in node-local computations, exploiting caches. Our coordination of low communication algorithm and massively parallel architecture for scalable performance is not limited to running FFT on Xeon Phi; it can serve as a reference for other bandwidth-bound computations and for emerging HPC systems that are increasingly communication limited.

Chair/Author Details:

Darren J. Kerbyson (Chair) - Pacific Northwest National Laboratory

Jongsoo Park - Intel Corporation

Ganesh Bikshandi - Intel Corporation

Karthikeyan Vaidyanathan - Intel Corporation

Ping Tak Peter Tang - Intel Corporation

Pradeep Dubey - Intel Corporation

Daehyun Kim - Intel Corporation

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

The full paper can be found in the ACM Digital Library