Android and Hard Real Time
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This document discusses running real-time tasks on Android. It notes that while Android's Linux kernel lacks real-time capabilities and digital I/O support needed for safety-critical real-time applications, alternatives like RTAI, RT-Linux, or a custom SParK hypervisor could potentially allow running one periodic hard real-time task concurrently with the Android OS without resource sharing. The document considers various options and references materials on integrating real-time capabilities into Android.
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Android 5.0 Lollipop introduces material design principles, enhanced notifications, improved battery life through ART and JobScheduler, multiple network connections, new camera and audio APIs, expanded security features, and cross-device synchronization. It also provides multi-dex support to overcome the method limit, and improved performance through ART's ahead-of-time compilation compared to Dalvik's just-in-time compilation. Developer tools have also been enhanced to analyze battery usage statistics.
Modern Web-site Development Pipeline
Topics of this presentation:
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- Core with Docker and Linux.
- PowerShell Core automated builds.
- Markdown/PDF documentation.
- Documentation of public interfaces with Swagger/OAS/YAML.
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This presentation by Sergii Fradkov (Consultant, Engineering), Andrii Zarharov (Lead Software Engineer, Consultant), Igor Magdich (Lead Test Engineer, Consultant) was delivered at GlobalLogic Kharkiv .NET TechTalk #1 on May 24, 2019.
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Enhancing and modifying_the_core_android_os
This document discusses modifying and enhancing the Android OS. It provides an overview of the Android framework, including applications, system UI, providers and APIs, Dalvik/Android runtime, libraries, and the kernel. It describes how to build Android for a phone by getting a build machine ready, downloading the source code, and building the OS. It outlines how to modify different parts of Android like apps, framework, hardware abstraction layer, libraries, and kernel. It also discusses open source custom Android distributions and contributing changes back to the Android Open Source Project.
stackconf 2020 | Replace your Docker based Containers with Cri-o Kata Contain...
They provide the workload isolation and security advantages of VMs. but at the same time maintain the speed of deployment and usability of containers.by using kata containers, instead of namespace, small virtual machines are created on the kernel and be strongly isolated. The technology of Kata Containers is based on KVM hypervisor. That’s why the level of isolation is equivalent to typical hypervisors. This session will focus on a live production phase when choosing kata instead of docker, and why they are preferable
Although containers provides software-level isolation of resources, the kernel needs to be shared. That’s why the isolation level in terms of security is not so high when compared with hypervisors.This learns to shift from Docker as the de facto standard to Kata containers and learn how to obtain higherl level of security
My androidpresentation
The document discusses the history and development of the Android operating system, describing how it was created by Android Inc. and later acquired by Google, and outlines some of the key aspects of the Android platform including its open source nature, hardware requirements, software architecture using Linux and Java, and security features. It also provides an overview of the software development process for Android including required tools and common application components.
Docker & aPaaS: Enterprise Innovation and Trends for 2015
WaveMaker Webinar: Cloud-based App Development and Docker: Trends to watch out for in 2015 - http://www.wavemaker.com/news/webinar-cloud-app-development-and-docker-trends/
CIOs, IT planners and developers at a growing number of organizations are taking advantage of the simplicity and productivity benefits of cloud application development. With Docker technology, cloud-based app development or aPaaS (Application Platform as a Service) is only becoming more disruptive − forcing organizations to rethink how they handle innovation, time-to-market pressures, and IT workloads.
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Android OS
The document provides an overview of the Android operating system. It discusses that Android is an open source software platform based on the Linux kernel and allows developers to write managed code using Java. It is developed by Google and other companies part of the Open Handset Alliance. The document then describes Android's history and architecture, including its use of the Linux kernel, Binder for inter-process communication, Dalvik virtual machine, core libraries, and application framework. It also covers the application lifecycle and how the Android system starts up.
Maria_Colgan_2.pdf
Oracle Database 19c provides numerous new features and enhancements including:
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- A new automatic indexing feature that implements indexes based on what a skilled performance engineer would do.
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Docker in pratice -chenyifei
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Android PPT
Android is a mobile operating system based on a modified Linux kernel. It is an open source software stack that includes an operating system, middleware, and applications. Android was created to enable software development for small electronic devices and to provide a full phone software stack including applications. It uses architectures like a proven driver model, security and memory management, and efficient computing resource management to function as a stable mobile operating system.
Docker
Docker is a tool designed to make it easier to create, deploy, and run applications
by using containers. Containers allow a developer to package up
an application with all of the parts it needs, such as libraries and other dependencies,
and ship it all out as one package. By doing so, thanks to the
container, the developer can rest assured that the application will run on
any other Linux machine regardless of any customized settings that machine
might have that could differ from the machine used for writing and testing
the code.
In a way, Docker is a bit like a virtual machine. But unlike a virtual
machine, rather than creating a whole virtual operating system, Docker allows
applications to use the same Linux kernel as the system that they’re
running on and only requires applications be shipped with things not already
running on the host computer. This gives a significant performance boost
and reduces the size of the application.
Latest (storage IO) patterns for cloud-native applications
Applying micro service patterns to storage giving each workload its own Container Attached Storage (CAS) system. This puts the DevOps persona within full control of the storage requirements and brings data agility to k8s persistent workloads. We will go over the concept and the implementation of CAS, as well as its orchestration.
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West is a command line tool that manages Zephyr projects. It initializes workspaces, updates repositories, and provides commands for common development tasks like building, flashing, and debugging. West separates the core tool functionality from Zephyr-specific extensions, allowing it to manage multiple projects. When initializing a workspace, West clones the main Zephyr repository and any dependencies, creating a reproducible development environment.
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The document is a report from a committee appointed by the Ministry of Human Resource Development to recommend autonomy measures for the Indian Institutes of Technology (IITs). The committee's key recommendations are:
1) IITs should be granted complete autonomy to manage themselves more flexibly and pursue innovative ideas.
2) IITs need to significantly scale up their research infrastructure and output to support India's development needs, though expansion costs will still need government support.
3) IITs should work towards becoming self-sustaining through non-governmental sources of funding once autonomous management is in place.
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The document discusses E-Yantra Robot Abstractions which aims to simplify robot programming and make it platform independent by enabling the use of higher level programming languages. It does this by building tools that abstract away the low-level microcontroller details and instead provide services over XBee that can be accessed from a PC. This includes services for actuators, sensors, operating system functions, and interrupts that allow subscription to events using a publish/subscribe model. The goal is to generate code automatically from XML definitions of the robot platform and accessories to minimize manual coding.
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Presented by Vladimir Iglovikov:
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- https://x.com/viglovikov
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The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
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Speakers:
Bob Boule
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Android and Hard Real Time
- 1. Real Time Android Akshar 24/8/11
- 2. Objective • Having an Android based device capable of running hard real time tasks
- 3. Why? • Robust embedded linux kernel • Community supported open souce native libraries • Well thought partitioning between managed and unmanaged code • Well developed/documented APIs for HMI.
- 4. What Android lacks • Safety Critical features • Real-Time kernel • Not much support of digital analog I/O. wired interfaces etc. [typically required in SCRT scenarios]
- 6. Android Kernel • 2.6.25 kernel modified specifically for low power, low CPU, portable devices. • Translates to 75 edits and 88 new file additions • 5 changes to scheduler mostly to the run- queue locking • IPC Binder is new feature by Google.
- 7. Android Applications • Each Android app is a process • Scheduled by the underlying Linux scheduler (SCHED_OTHER) • Memory management however is done by Dalvik VM
- 9. RT Suitability • Android Kernel uses the same Completely Fair Scheduler of Linux 2.6 • The libc implementation for Android is called bionic and it does not support process level mutexes but supports thread level mutexes and conditions. • No implementation of priority inheritance/ ceiling is present
- 11. Available hypervisors • RTAI • RT-Linux • RT patch set for linux • Our own SParK
- 12. RTAI • RTAI patch is not compatible with android kernel out of the box. [Already tried that]
- 13. RT patch set (PREEMPT_RT) • Uses 2.6’s new features such as CONFIG_PREEMPT • Well documented • Seems doable at the moment
- 14. SPaRK • Can it run a rich non RT OS like android on top of it ? • Documentation? • Community Support?
- 15. To Summarize • Can we build a system with one periodic HARD REAL TIME task along with Android? – For simplicity we will assume that this task will not share any resources with other Android Processes.
- 16. References • http://www.linuxjournal.com/magazine/real-time-linux-kernel- scheduler • Evaluating Android for Real Time Applications (OSPERT -2010) • http://embedded-computing.com/android-rtos-duo-todays- medical-devices • Reliable Real-Time Applications on Android OS • An In-Vehicle Infotainment Software Architecture Based on Google Android • http://www.ibm.com/developerworks/linux/library/l-completely- fair-scheduler/ • http://www.ibm.com/developerworks/linux/library/l-cfs/index.html • http://www.scandevconf.se/db/Marakana-Android-Internals.pdf