optimization

Posted on by Jean-Luc Aufranc (CNXSoft) - 4 Comments on Android P Developer Preview Released with Indoor Positioning, Display Notch Support, HDR VP9 Video, and More

Android P Developer Preview Released with Indoor Positioning, Display Notch Support, HDR VP9 Video, and More

Android-P-Cutout-Indoor-Location

Google has just announced the release of the first developer preview for Android P mobile operating system, as the company is looking for feedback from developers who can use the official Android emulator, as well as images for Pixel, Pixel XL, Pixel 2, and Pixel 2XL devices for testing Google will take into account comments from developers before finalizing the APIs and features. That won’t be the only preview however, as the company plans to release other developer previews planned before the stable release at the end of the year, and Google aims to reveal more at Google I/O 2018 next week. Some of the interesting changes and new features found in Android P so far: Indoor positioning with Wi-Fi RTT (Round Trip Time) also known as 802.11mc WiFi protocol Display cutout support for some of the new phones with a notch Improved messaging notifications, for example highlighting who is […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Embedded Linux Conference & IoT Summit 2018 Schedule

Embedded Linux Conference & IoT Summit 2018 Schedule

The Embedded Linux Conference 2018 and the OpenIoT Summit 2018 will jointly take place next month, on March 12 – 14, 2018 in Portland, Oregon, USA. The former is a “vendor-neutral technical conference for companies and developers using Linux in embedded products”, while the latter is a “technical conference for the developers and architects working on industrial IoT”. The Linux Foundation has already published the schedule, and it’s always useful to learn what will be discussed about even for people who won’t attend. With that in mind, here’s my own virtual schedule with some of the talks I find interesting / relevant to this blog. Monday, March 12 10:50 – 11:40 – Progress in the Embedded GPU Ecosystem by Robert Foss, Collabora Ltd. Ten years ago no one would have expected the embedded GPU ecosystem in Linux to be what it is now. Today, a large number of GPUs have […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 13 Comments on Google Introduces Android 8.1 Go Edition for Low End Smartphones

Google Introduces Android 8.1 Go Edition for Low End Smartphones

With Android 8.1 preview release, we already knew Google was working on optimizations for Android Go for devices with 512MB to 1GB memory, and a new Neural Networks API to accelerate on-device machine intelligence. Android 8.1 will be released tomorrow, and Google has now officially introduced Android Oreo Go Edition that will be part of the release tomorrow. Optimizations cover three main components Operating System – Performance and storage improvements with data management features and security benefits built-in. The company now claims the operating system will take much less space, and actually double free space on a typical 8GB eMMC flash. Google Apps – New set of Google apps designed to be lighter and relevant to people who are coming online for the first time. App size will be reduced by around 50% on Android Go. Google Play Store – A tuned version of the Google Play Store that works […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 4 Comments on Embedded Linux Conference & Open Source Summit Europe 2017 Schedule

Embedded Linux Conference & Open Source Summit Europe 2017 Schedule

The Embedded Linux Conference & IoT summit 2017 took place in the US earlier this year in February, but there will soon be a similar event with the Embedded Linux Conference *& Open Source Summit Europe 2017 to take up in Europe on October 23 – 25 in Prague, Czech Republic, and the Linux Foundation has just published the schedule. It’s always useful to find out what is being discussed during such events, even if you are not going to attend, so I went through the different sessions, and compose my own virtual schedule with some of the ones I find the most interesting. Monday, October 23 11:15 – 11:55 – An Introduction to SPI-NOR Subsystem – Vignesh Raghavendra, Texas Instruments India Modern day embedded systems have dedicated SPI controllers to support NOR flashes. They have many hardware level features to increase the ease and efficiency of accessing SPI NOR […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 7 Comments on Make-WiFi-Fast Project Massively Improves WiFi Performance of Busy WiFi Routers

Make-WiFi-Fast Project Massively Improves WiFi Performance of Busy WiFi Routers

WiFi is a great way to add connectivity to a large group of people, but once everybody tries to connect at the same time, the network often becomes unusable due to very high latency, a problem that can occur on servers on the ISP side too, and that’s usually caused by excessive buffering, Bufferbloat. The Bufferbloat project aims to resolve this issue with both routers using CoDel and fq_codel algorithms, as well as WiFi  via Make-WiFi-Fast project. Dave Täht gave a presentation of his work on Make-WiFi-Fast project entitled “Fixing WiFi Latency… Finally“showing how latency was reduced from seconds to milliseconds. It’s quite technical, but two slides of the presentation clearly shows the progress made. The first chart shows 100 stations connecting to a website using unpatched code with the top of the chart showing the bandwidth per node in MBits/s, while the lower part showing latency in ms. We […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 1 Comment on Embedded Linux Conference and OpenIoT Summit Europe 2016 Videos are Now Available Online

Embedded Linux Conference and OpenIoT Summit Europe 2016 Videos are Now Available Online

The Embedded Linux Conference and OpenIoT Summit Europe 2016 conferences took place on October 11 – 13 in Berlin, Germany, with many interesting talks about Linux, development boards, power management, embedded systems, software optimization, tools, and so on, as well as a few keynotes. The Linux Foundation has recorded most talks and keynotes, and made the videos available on their website. A free registration is required, and will redirect you to the full unlisted playlist on YouTube. Tim Bird keynote can be watch directly without registration. You can also download the slides for each presentation. Thanks to Harley for the tip. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011. www.cnx-software.com

Posted on by Jean-Luc Aufranc (CNXSoft) - 9 Comments on How to Resolve Slow Boot Times in Ubuntu 16.04

How to Resolve Slow Boot Times in Ubuntu 16.04

I’ve recently upgraded my machine from Ubuntu 14.04.4 to Ubuntu 16.04.1, but while my computer used to boot in about 40 seconds, after the upgrade boot times increased considerably to 2 to 3 minutes. The first easy check was to look at dmesg:

There’s a bit 87 seconds gap between checking for the floppy, and VirtualBox drivers loading. So there’s definitely an issue here, but the log does not exactly give a clear queue. I’ve read you could use systemd-analyze to find which process(es) may be slowing down your computer at boot time:

Two processes are taking close to 8 seconds, but those 16 seconds still do not explain why it takes 2 minutes more to boot…Eventually, I realized systemd-analyze has a few more tricks up its sleeves:

The first command shows there’s no problem with the kernel itself, and something is slow in user space. The […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 2 Comments on Android N Developer Preview 3 Adds VR Support, Instant Apps, and Sustainable Performance Mode

Android N Developer Preview 3 Adds VR Support, Instant Apps, and Sustainable Performance Mode

Google has also unveiled the third Android N Developer Preview at Google I/O 2016, and the first “beta quality” release, available on Nexus 6, 9, 5X, 6P, Nexus Player, Pixel C, and Android One as a “seamless updates” if you opt-in to the Android Beta Program in order to get an over-the-air update with the very latest firmware. Google wants Android N to be faster, safer and more productive. The first two previews addressed performance with a new JIT compiler and Vulkan 3D graphics API support, productivity with multi-window support and direct reply from notifications, as well as security thanks to seamless updates bringing the latest security patchsets to your phones in a timely manner. The third preview brings fixes, and some interesting new features: VR Mode in Android – Google has modified and augmented the Android stack in N to reduce lag between sensor data readings (e.g. head motion) […]

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