Clonecloud: Elastic execution between mobile device and cloud [1]

Transcription

1 Clonecloud: Elastic execution between mobile device and cloud [1] ACM, Intel, Berkeley, Princeton 2011

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3 Cloud Systems Utility Computing Resources As A Service Distributed Internet VPN Reliable and Secure

4 Mobile Computing Very Popular iphones Android Very Pervasive Phones Tablets Clothes Way of the future

5 Diverse Architectures Traditional machines: x86 Mobile platforms: ARM Others Security Portability Communication

6 Power/Cycle Limitations Short battery life Resources used for screen/auxiliary services Low speed processors Undervolted to save power Need to improve performance

7 Virtual Machines Desktop virtualisation Abstraction between hardware and software Common usage VMware Java Mobile platforms ios Gingerbread

8 Managed Languages Garbage Collection Threading/Parallelising Security/Access control Ease of programming Mobile developers are busy people

9 Native Methods Methods which must be run on certain platforms Mobile API to interface with hardware Camera GPS Microphone/Speaker Screen Partitioning needs to be aware of this

10 Duality Binary cloud-mobile split Cloud offers computation service to connected mobile Wi-fi 3G/4G Mobiles choose to offload execution to cloud

11 Migration Limitations Accessing native methods Methods accessing the phone s hardware API must be located on the mobile Shared variables Methods which share state must be co-located Nested deadlocking Methods blocking for migrated code may not migrate more code before the completion of previous migration Save power Save time

12 Static Analysis Determine points of migration Locked to method boundaries (can we do better?) Per-thread basis Under-approximate migration points. Reachability is undecidable

13 Automatic Profiling Determine how well code runs on cloud/mobile Ad hoc experimentation Run on both platforms Run under varying (random) conditions Run for different migrations

14 Optimisation Determine migration strategy Optimise for: Time (synchronous) Energy No tradeoff Constraints: migration limitations

15 Management Management Threads Migration Manager Serializes objects/data Blocks when migrated data is requested Node Manager Connects with cloud Determines what is best to migrate Partition Database Records possible partitionings Used by Node Manager

16 State Capture/Transmission Objects Java Garbage collector runs on both mobile and clone New object created Synchronises mobile and cloud

17 Implementation HTC G1 Cupcake Wi-fi and 3G Server Xeon 3.0 Ghz VMWare Extensive code modification Benchmarks: Virus Scan Image Search Privacy Preserving Advertisement

18 Profiles

19 Speedup

20 Power Saving

21 Benchmarks Made their own Virus scan Facial recognition Advertising Representative? Business?

22 Execution Machines Only one phone Better on phones with more serious networking? Bluetooth Infra-red Only one server Worse on servers under heavy load?

23 References I,,,, and. Clonecloud: Elastic execution between mobile device and cloud. In Proceedings of the sixth conference on Computer systems, pages ACM, 2011.

24 Questions?