Chuck Moore, AMD - Semiconductor Research Corporation

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Lots of Challenges … • Memory BW and Data Movement • Keeping up with the computation rates will require increasingly capable memory systems • New and appropriate Software Stack and APIs • A programming model that builds on emerging multi-core models • Use abstraction to trade some performance for programmer productivity • Live within bounds set by ecosystem OS and Concurrent Runtimes • Managing context state and exceptions • This includes the program-visible state in the compute offload engine! • Virtualizing the context state • Communications/Messaging • Simplified & fabric independent producer-consumer model • Optimized communications is a key enabler • It’s the synchronization, stupid! 16 7/17/2008 The Role of Accelerated Computing in the Multi-core Era
The Memory Wall – getting thicker There has always been a Critical Balance between Data Availability and Processing Situation When Implication Industry Solution DRAM vs CPU Cycle Times Widening GAP Early 1990s Memory wait time dominates computing Non-blocking caches O-o-O Machines ☺ SW Productivity Crisis: Round 1 Object oriented languages; Managed runtime environments Early 1990s Larger working sets More diverse data types Larger Caches Cache Hierarchies Elaborate prefetch Frequency and IPC Wall CMP and Multi-Threading 2005 and beyond Multiple working sets! VMs! More memory transactions Huge Caches Elaborate MemCtlrs ! SW Productivity Crisis: Round 2 Increased abstraction layers Image/Video as basic data types 2009 and beyond Even larger working sets Larger data types Accelerated Computing Throughput Computing Chip Stacking TBD 17 7/17/2008 The Role of Accelerated Computing in the Multi-core Era
Page 1 and 2: May 17, 2006 The Role of Accelerate
Page 3 and 4: Moore’s Law (Gordon Moore, Electr
Page 5 and 6: Customer Value beyond just Performa
Page 7 and 8: Amdahl’s Law Speed-up = 1 S W + (
Page 9 and 10: Optimized CMP Platforms for Perform
Page 11 and 12: What about Throughput Computing •
Page 13 and 14: Characteristics of Throughput Compu
Page 15: Accelerated Computing: Motivations
Page 19 and 20: The Emerging Layers of Computation
Page 21 and 22: Lots of Interesting Implications Th
Page 23: Thank You ! Questions ©2008. Advan

Chuck Moore, AMD - Semiconductor Research Corporation

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