big.little 多核架構白皮書
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2013-07-19
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Copyright © 2012 ARM Limited. All rights reserved.
The ARM logo is a registered trademark of ARM Ltd.
All other trademarks are the property of their respective owners and are acknowledged
Page 1 of 8
Big.LITTLE Processing with
ARM Cortex™-A15 & Cortex-A7
Improving Energy Efficiency in High-Performance Mobile Platforms
Peter Greenhalgh, ARM September 2011
This paper presents the rationale and design behind the first big.LITTLE™ system from ARM based on
the high-performance Cortex™-A15 MPCore™ processor, the energy efficient Cortex-A7 MPCore
processor, the coherent ARM CoreLink™ CCI-400 interconnect and supporting IP.
Contents
Contents ....................................................................................................................................................................................... 1
Introduction ............................................................................................................................................................................... 2
The Processors ......................................................................................................................................................................... 2
The System ................................................................................................................................................................................. 4
big.LITTLE Task Migration Use Model ............................................................................................................................ 5
big.LITTLE MP Use Model .................................................................................................................................................... 7
Software ...................................................................................................................................................................................... 7
Conclusion .................................................................................................................................................................................. 8
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