Slides: http://connect.linaro.org/resource/sf...

SFO17-400K1 Speaker: Iliyan Malchev Google

2. What and Why 1 What is the problem? Why do we care to solve it? Userspace 2 What is the solution? What is the timeframe? Kernel 3 Tackling kernel fragmentation Results 4 Some stats and early results I Agenda 4. https://developer.android.com/about/d... I Userspace

7. Faster Device Launches on Latest Google SoC OEM users Easier Device Upgrades Google Better Quality Google SoC OEM users BEtter Security esp. Kernel Google SoC OEM users I Who Wants What 8. The Life of an Android Device Launch 9. I Start with AOSP 10. ... I Add Functionality/Customizations 11. ... I Adapt to SoC and Device 12. "HALs" "Ext"AOSP I Reality 13. ● Short product cycles ● No Single Android OS to update ○ Large AOSP Delta ○ SoC Support not universal ● Certification: Carrier, Regulatory, CTS ● QA ● Support Call Center, OTA Infrastructure, etc... "HALs" ExtAOSP I Difficult means Expensive 15. Architectural changes Android Platform Operational changes Partner outreach Compatibility changes Partner outreach Upstreaming Android Platform I Project Treble 16. ExtAOSP "HALs" ExtAOSP I Solve SoC Support 17. kernel driverdriverdriver driverdriver libc other libraries activity Media Server System Server Camera Server Audio Server Surface Flinger OMX ... ... camera HAL audio HAL gralloc hwc sensor HAL etc ART API java.* android.* GL HAL Binder I Android Architecture Pre-O 18. kernel driverdriverdriver driverdriver libc other libraries activity Media Server System Server Camera Server Audio Server Surface Flinger OMX ... ...camera HAL audio HAL gralloc hwc sensor HAL etc ART API java.* android.* GL HAL Binder Binder I Android Architecture Post-O 19. I The Vendor Test Suite CTS VTS Android Framework VINTF Implementation General System Image VINTF Implementation CTS on AOSP Before Oreo Android Oreo HAL Kernel Library 20. "HALs" ExtAOSP I Tackle the AOSP Delta 21. Q3 ACP ALL HANDS Multiple implementations of same functionality Drive convergence between AOSP and Framework Variants Forum involving major contributors to AOSP Feature review, approval, reengineering Non-US regulatory requirements Extensions to Bluetooth, Telephony, Dialer, SysUI, Home Screen I Upstreaming 22. "HALs" ExtAOSP ExtAOSP 23. Must pass Vendor Test Suite VTS; tests for HALs for approval All OEM devices launched with O must implement Treble HALs Must pass CTS on AOSP Q3 ACP ALL HANDS This includes older SoCs that will be used by OEMs to launch O-based devices I Compatibility Requirements 25. ● Release uptake is 6 months to a year ○ Mostly just flagships ● Solving the problem forwards ● Customer pull is strong ● Attention Span outside and within ● Addressing fragmentation is a MUST I The One-Release Fix 27. Existing LTS is not Enough Device Kernel Stable Long Term Support Android Common SoC Kernel Device Release Device Update Clone Merge Cherry-Pick Device Update Device Update Device Update 28. Announcing 6-year LTS Device Kernel Stable Long Term Support Android Common SoC Kernel Device Release Device Update Clone Merge Cherry-Pick Device Update Device Update Device Update 30. health/1.0 thermal/1.0 oemlock/1.0 gnss/1.0 automotive/vehicle/2.0 automotive/vehicle/2.1 automotive/evs/1.0 audio/2.0 audio/effect/2.0 audio/common/2.0 vibrator/1.1 vibrator/1.0 tv/cec/1.0 tv/input/1.0 bluetooth/1.0 usb/1.1 usb/1.0 gatekeeper/1.0 wifi/offload/1.0 wifi/supplicant/1.0 wifi/1.0 radio/1.1 radio/1.0 radio/deprecated/1.0 renderscript/1.0 weaver/1.0 light/2.0 keymaster/3.0 soundtrigger/2.0 ir/1.0 boot/1.0 graphics/allocator/2.0 graphics/bufferqueue/1.0 graphics/mapper/2.0 graphics/common/1.0 graphics/composer/2.1 drm/1.0 nfc/1.0 biometrics/fingerprint/2.1 contexthub/1.0 broadcastradio/1.1 broadcastradio/1.0 power/1.1 power/1.0 vr/1.0 sensors/1.0 configstore/1.1 configstore/1.0 media/omx/1.0 media/1.0 memtrack/1.0 dumpstate/1.0 camera/metadata/3.2 camera/provider/2.4 camera/device/3.2 camera/device/1.0 camera/common/1.0 tetheroffload/control/1.0 tetheroffload/config/1.0 I 60 Subsystem Conversions 31. Authors Files 300 3000 Commits 20k LOC ~1M I Code Stats 32. Qualcomm, Mediatek, Samsung/LSI, Huawei/HiSilicon, Motorola, Sony, LG Partners San Diego Taipei Seoul Onsite Teams 7 3 Direct on-site visits Partner Summits Android Bootcamp Executive Sync-ups Forums + 3 Qualcomm SoCs 1 Mediatek SoC 1 HiSilicon SoC 1 Exynos SoC SONY Huawei Samsung Oreo Launches / Upgrades 3/1 I Partner Outreach 34. Clone Merge Cherry-Pick Linux 4.9.y Android Common 4.9 msm-4.9 Common SoC Kernel MSMXXXX based device 1 MSMXXXX based device 2 MSMXXXX based device 3 Linux 4.9.y xLTS backports exynos-4.9 Common SoC Kernel mediatek-4.9 Common SoC Kernel I Kernel Unification 35. I There's More To Do ● Continued work with SoC Vendors ● Continued work on Kernel Unification ● Expanding test coverage ● Bringing the ecosystem together with Linaro