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Power Optimization in Graphics Architecture

 Jason Ross, Dr. Wen-Fu Kao
Description: Agenda- The New World, A Little Physics: Why the New World Requires New Optimizations, Optimizing the Intel® HD Graphics Architecture for the New World. Strong Desire for More Performance: More compelling experiences, More computation in a smaller package!, High-DPI “retinal” displays – 2-4x more pixels, Range of visual experiences: 2D, 3D, media, Combined together - All-day computing at higher performance. What Determines Power- Power has two main components – “Dynamic Power” and “Leakage”. Dynamic Power- Goes up with switching transistor count, Goes up with frequency, Goes up even faster with voltage (V2), Leakage- Goes up with powered transistor count, Doesn’t matter what the frequency is Goes up very fast with voltage (V3 or so), But frequency and voltage are themselves related. Voltage, Frequency and Power- The voltage vs. frequency curve tends to have an inflection point- Fmax@Vmin: the fastest the part can operate at Vmin, In the voltage-scaling region, power increases much faster than frequency: Voltage is scaling roughly linearly with frequency, Dynamic power goes up as V2f, Leakage goes up roughly as V3. Voltage, Frequency, Power and Size- Consider two parts: One 2x the size of the other, Designed to the same rules, so same Fmax@Vmin. With lots of available power, both parts are running faster than Fmax@Vmin, and the big part performs much better than the small part, With less available power, the small part is above Fmax@Vmin, but the big part is not; the performance gap between the parts narrows, With even less available power, both parts are running slower than Fmax@Vmin, and perform roughly the same. 14nm- Freq at constant voltage gets faster, Or leakage at constant voltage gets smaller, Or both, Cdyn per transistor gets smaller, Area per transistor gets smaller. Migrating Work to Fixed-Purpose Hardware- Moving tasks from general-purpose to fixed-purpose hardware saves power, We migrate non-programmable tasks from general-purpose EUs to Fixed Functions.
Views: 3231
Domain: Electronics
Category: Displays
Contributing Organization: Intel Corporation
 ‐ More of their Presentations
Maxims of Tech: Rules of Engagement for a Fast Changing Environment
Intel® Processor Graphics:
Power Optimization in Graphics Architecture
Jason Ross – Graphics Architect, Intel Corporation
Dr. Wen-Fu Kao – Graphics Media Architect, Intel Corporation


• The New World
• A Little Physics: Why the New World Requires New Optimizations

• Optimizing the Intel® HD Graphics Architecture for the New World
• What Do ... See more

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