MultiDroid: A Novel Solution to Consolidate Interactive Physical Android Clients on One Single Computing Platform

Transcription

1 MultiDroid: A Novel Solution to Consolidate Interactive Physical Android Clients on One Single Computing Platform Bin Yang Shoumeng, Yan Intel R&D Center Intel Labs

2 Agenda Background and Scenarios Solution Evaluation Summary and Next

3 Background Leverage computing power of modern CPU to consolidate workloads Requirements come from different scenarios such as Retail, Automotive and Game cloud.

4 Scenario: Rear Seat Entertainment HVAC Video Music Game Map Conference

5 Scenario: Cloud Gaming

6 Scenario: Robot

7 Scenario: Auto Vending Machine

8 Solution - MultiDroid Solutions Comparing Architecture Advantages Implementation

9 Solutions Comparing MultiDroid

10 Architecture Hdmi Cable Hdmi port USB Cable USB port Hdmi Cable Hdmi port USB Cable USB port Hdmi Cable Hdmi Cable USB Cable Hdmi Hdmi port port Signal splitter Chips USB port Hdmi port USB Cable USB port User space Instance Mgr OS instance1 OS instance2 OS instance3 OS instance4 Kernel SoC Platform USB Controller Display Controller Sensor Chip CPU GPU Ethernet

11 Advantages Lightweight Supports different Linux-based OS Little overhead. Simple I/O sharing solution. Recovery mechanism Security Guarantee Easy Deployment & Maintenance

12 Implementation: MultiDroid File System Layout Kernel I/O Devices Virtulization AOSP

13 File System Layout Different data partitions for different Android instances. system.img is shared between different Android instances. Overlay fs can be used if different system.img is required.

14 Kernel - Binder Instance 1 Instance 2 Instance N Full Android user space stack Full Android user space stack Full Android user space stack /dev/binder /dev/binder /dev/binder /dev/binder1 /dev/binder2 /dev/binder(n) Kernel

15 I/O Devices Virtulization Dedicated I/O devices e.g. Usb Host Shared I/O devices e.g. GFX, Trusty

16 I/O - USB Touch Instance 1 Instance 2 Instance N Full Android user space stack Full Android user space stack Full Android user space stack /dev/input /dev/input /dev/input /dev/input0 /dev/input1 /dev/input(n-1) Kernel

17 I/O GFX and Display Android Instance N Android Instance 1 SurfaceFlinger MultiDroid Composer(MDC) Gralloc vhal HWComposer vhal OpenGL ES Android backend X11 backend Wayland backend DRM backend Gralloc GPU Driver Display Driver Kernel

18 I/O - Trusty Security Storage Daemon IPC Android Instance N Android Instance 1 KeyMaster KeyMaster GateKeeper GateKeeper Security Storage APP1 Trusty OS Security Storage APP2 RPMB Driver Storage Drvier Trusty IPC Driver Trusty IPC Driver Kernel RPMB AuthKey

19 AOSP Low memory Killer Recovery

20 Low Memory Killer Android Instance 1 Android Instance N Process A Process A Process B AMS Process B AMS LMKD Send kill event Update adj with weight LMKD Update adj with weight Select Module Select to-be-killed process according to adj Process A in Ins1 Process B in Ins1 Process A in Ins2 Process B in Ins2 Memory monitor Kernel

21 Recovery Instance 1 process process process Instance N process process process Child process will send signal to init before it is exit Child process will restart process Child process will send signal to init before it is exit Child process will restart process Init process Init process Monitor init process Instance Manager watchdog

22 Evaluation Environment setup Evaluation result

23 Evaluation Setup Exclusive test: single active instance while multiple instances are created but in idle state Concurrent test: system performance where multiple instances run with continuous workload simultaneously Memory consumption Hardware: Intel mini Kaby Lake PC Intel(R) Core(TM) i5-7260u 2.20GHz *2 /HDMI display and touch Software: Android 7.1.2

24 Result Exclusive : Antutu Cold Boot Concurrent: Game FPS Memory Consumed(GB)

25 Summary Raised the idea to consolidate workloads using container technology. Designed simple I/O sharing solution. Implemented POC to consolidate 16 Android Instances in KabyLake Nuc.

26 Next Enhance security. Optimize boot time and memory usage. Integrate different Linux based OS in one platform. Explore the possibility to integrate with VM solution.

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