BK21 정보기술사업단-반도체공동연구소 공동세미나 안내
［Corona: System Implications of Emerging Nanophotonic Technology］
일 시 : 2009년 12월 28일 월요일 16:00-16:50
장 소 : 서울대학교 반도체공동연구소 설계연구관 도연홀
연 사 : Jung Ho Ahn
(assistant professor at Seoul National University,Graduate School of Convergence Science and Technology)
We expect that many-core microprocessors will push performance per chip from the 10 gigaflop to the 10 teraflop range in the coming decade. To support this increased performance, memory and inter-core bandwidths will also have to scale by orders of magnitude. Pin limitations, the energy cost of electrical signaling, and the non-scalability of chip-length global wires are significant bandwidth impediments. Recent developments in silicon nanophotonic technology have the potential to meet these off- and on-stack bandwidth requirements at acceptable power levels.
Corona is a 3D many-core architecture that uses nanophotonic communication for both inter-core communication and off-stack communication to memory or I/O devices. Its peak floating-point performance is 10 teraflops. Dense wavelength division multiplexed optically connected memory modules provide 10 terabyte per second memory bandwidth. A photonic crossbar fully interconnects its 256 low-power multithreaded cores at 20 terabyte per second bandwidth. Throughout performance simulation with the SPLASH-2 benchmark suite, we believe that in comparison with an electrically-connected many- core alternative that uses the same on-stack interconnect power, Corona can provide 2 to 6 times more performance on many memory intensive workloads, while simultaneously reducing power.
Jung Ho Ahn is an assistant professor at Seoul National University, Graduate School of Convergence Science and Technology. He worked at HP Labs exploiting nanophotonics to connect intra-/inter-chip computation and storage resources as well as studying advanced memory systems. Jung Ho received a Ph.D. in Electrical Engineering from Stanford University, where he worked on Merrimac and Imagine projects applying stream computing to multimedia and scientific application domains. He has more than 20 technical papers and received multiple best paper awards.
담당교수 : 전기컴퓨터공학부 정덕균 (문의 : 김은영, Tel. 880-1306 )