Title :
Many-Core vs. Many-Thread Machines: Stay Away From the Valley
Author :
Guz, Zvika ; Bolotin, Evgeny ; Keidar, Idit ; Kolodny, Avinoam ; Mendelson, Avi ; Weiser, Uri C.
Author_Institution :
EE Dept., Technion - Israel Inst. of Technol., Haifa
Abstract :
We study the tradeoffs between many-core machines like Intelpsilas Larrabee and many-thread machines like Nvidia and AMD GPGPUs. We define a unified model describing a superposition of the two architectures, and use it to identify operation zones for which each machine is more suitable. Moreover, we identify an intermediate zone in which both machines deliver inferior performance. We study the shape of this ldquoperformance valleyrdquo and provide insights on how it can be avoided.
Keywords :
coprocessors; multi-threading; multiprocessing systems; parallel architectures; AMD GPGPU; Intelpsilas Larrabee; Nvidia GPGPU; architecture superposition; many-core machines; many-thread machines; performance valley; Computer Systems; Multi-core/single-chip multiprocessors; Parallel Architectures; Processor Architectures;
Journal_Title :
Computer Architecture Letters
DOI :
10.1109/L-CA.2009.4
