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Monday, 16 Jul 18 - Tux Machines is a community-driven public service/news site which has been around for over a decade and primarily focuses on GNU/LinuxSubscribe now Syndicate content

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Kernel and Graphics: PDS, VKMS and Nouveau

Filed under
Graphics/Benchmarks
Linux
  • PDS 0.98s release

    PDS 0.98s is released with the following changes

    1. Fix compilation issue on raspberry pi.
    2. Minor rework and optimization on balance code path.
    3. Fix wrong nr_max_tries in migrate_pending_tasks.

    This is mainly a bug fix and minor optimization release for 4.17. The rework of balance code doesn't go well, it actually make more overhead than current implement. Another rework which based on current implement is still on going, hopefully be included in next release.

  • PDS-MQ CPU Scheduler Revised For The Linux 4.17 Kernel With Minor Optimizations

    Alfred Chen announced this week the release of PDS-mq 0.98s, his latest patch-set of this CPU scheduler against the Linux 4.17 upstream code-base and includes minor optimization work and bug fixes.

    The PDS scheduler stands for the "Priority and Deadline based Skiplist multiple queue scheduler" that is derived from Con Kolivas' former BFS scheduler with Variable Run Queue (VRQ) support. PDS design principles are to be a simple CPU process scheduler yet efficient and scalable. PDS-mq differs from Con Kolivas' current MuQSS scheduler.

  • Add infrastructure for Vblank and page flip events in vkms simulated by hrtimer

    Since the beginning of May 2018, I have been diving into the DRM subsystem. In the beginning, nothing made sense to me, and I had to fight hard to understand how things work. Fortunately, I was not alone, and I had great support from Gustavo Padovan, Daniel Vetter, Haneen Mohammed, and the entire community. Recently, I finally delivered a new feature for VKMS: the infrastructure for Vblank and page flip events.

    At this moment, VKMS have regular Vblank events simulated through hrtimers (see drm-misc-next), which is a feature required by VKMS to mimic real hardware [6]. The development approach was entirely driven by the tests provided by IGT, more specifically the kms_flip. I modified IGT to read a module name via command line and force the use of it, instead of using only the modules defined in the code (patch submitted to IGT, see [1]). With this modification in the IGT, my development process to add a Vblank infrastructure to VKMS had three main steps as Figure 1 describes.

  • The State Of The VKMS Driver, Preparations For vBlank & Page Flip Events

    One of the exciting additions to look forward to with the upcoming Linux 4.19 kernel cycle is the virtual "VKMS" kernel mode-setting driver. The driver is still a work-in-progress, but multiple developers are working on it.

  • NIR Continues To Be Prepped For OpenCL Support

    Longtime Nouveau contributor Karol Herbst who joined Red Hat several months ago has been working on Nouveau NIR support as stepping towards SPIR-V/compute support and this summer the work very much remains an active target.

  • Nouveau Gallium3D Moves Closer Towards OpenGL 4.5 Compliance

    While the RadeonSI and Intel i965 Mesa drivers have been at OpenGL 4.5 compliance for a while now, the Nouveau "NVC0" Gallium3D driver has been bound to OpenGL 4.3 officially.

    This Nouveau Gallium3D driver for NVIDIA "Fermi" graphics hardware and newer has effectively supported all of the OpenGL 4.4/4.5 extensions, but not officially. Originally the NVC0 problem for OpenGL 4.4 and newer was the requirement of passing the OpenGL Conformance Test Suite (CTS), which at first wasn't open-source. But now The Khronos Group has made it available to everyone as open-source. Additionally, the proper legal wrangling is in place so the Nouveau driver could become a conforming Khronos adopter under the X.Org Foundation without any associated costs/fees with Nouveau being purely open-source and primarily considered a community driver.

DistroWatch The Best Website For Distro Hoppers

Filed under
GNU
Linux

The DistroWatch features release announcements of new versions of hundreds of Linux and other distributions. It does host reviews of distros, podcasts, and newsletters. DistroWatch first published by Ladislav Bodnar, the founder, and maintainer, on May 31, 2001.

DistroWatch initially focused on Linux distributions. But later based on user requests, it went on adding different flavors of operating systems like BSD family, Android x86, Oracle Solaris, MINIX, and Haiku etc.

The DistroWatch presents detailed information at one place in a very convenient manner. At the time of writing this article, the DistroWatch hosted information of more than 300 active distributions (referring the list of distros populated under drop-down feature on the first page of the DistroWatch) and more than hundred in queue. It is said that the DistroWatch lives out of advertising and donation. LinuxCD.org is the first to advertise on the DistroWatch site.

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Ubuntu 18.04 LTS and 16.04 LTS Amazon Linux AMIs Now Support Amazon's SSM Agent

Filed under
Ubuntu

As of July 2018, Amazon's Linux AMIs (Amazon Machine Images) that are based on either the Ubuntu 16.04 LTS (Xenial Xerus) or Ubuntu 18.04 LTS (Bionic Beaver) operating systems now come pre-installed with the AWS Systems Manager Agent (SSM Agent), an Amazon software designed to run on hybrid or Amazon EC2 instances in public and private clouds on AWS (Amazon Web Services).

"With this new feature release, AWS Systems Manager Agent is installed by default on all instances launched or built from Ubuntu 16.04 LTS (2018.07 and later) and 18.04 LTS (all versions) AMIs," said Amazon. "By having the agent pre-installed, you can quickly start using AWS Systems Manager features such as Run Command, State Manager, Inventory and Patch Manager."

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How to play Windows games in Linux

Filed under
Gaming
HowTos

Game developers are increasingly taking advantage of the growing market in Linux gaming, but that’s not always been the case, and even now some games aren’t released outside of Windows. Thanks to a clever tool called Wine, though, you can run many Windows games—and other apps, including Office—as though they were native to Linux.

Wine provides a skeletal virtual version of Windows, inside which you install extra components and perform various tweaks (for example, selecting which version of Windows you want to emulate) to get your app working. Sadly, it’s not a silver bullet that will get all your Windows games working in Linux, but it should be able to give you access to at least some of them.

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How to enable developer mode on a Chrome OS tablet (and install Linux using Crouton)

Filed under
OS
Linux
HowTos

Google’s Chrome OS is designed to be a relatively secure, simple operating system that’s easy to use and hard to mess up. But you can run stable channel, beta channel, or dev channel software on any Chromebook depending on whether you want the safest experience or buggy, bleeding-edge features.

There’s also an option called Developer Mode, which is different from the dev channel. It allows you to access files and settings that are normally protected and use a command shell to explore the system. It’s designed for developers and advanced users only, since it increases the chances that you’ll break your Chromebook. But enabling Developer Mode is also a prerequisite for using one my favorite Chrome OS hacks: a tool called Crouton that allows you to install Ubuntu or another GNU/Linux distribution and run it alongside Chrome OS.

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Red Hat News and Press

Filed under
Red Hat

Belated Thoughts on van Rossum’s Departure

Filed under
Development
  • Is BDFL a death sentence?

    A few days ago, Guido van Rossum, creator of the Python programming language and Benevolent Dictator For Life (BDFL) of the project, announced his intention to step away.

    Below is a portion of his message, although the entire email is not terribly long and worth taking the time to read if you’re interested in the circumstances leading to van Rossum’s departure.

  • Thoughts on Guido retiring as BDFL of Python

    I've been programming in Python for almost 20 years on a myriad of open source projects, tools for personal use, and work. I helped out with several PyCon US conferences and attended several others. I met a lot of amazing people who have influenced me as a person and as a programmer.

    I started PyVideo in March 2012. At a PyCon US after that (maybe 2015?), I found myself in an elevator with Guido and somehow we got to talking about PyVideo and he asked point-blank, "Why work on that?" I tried to explain what I was trying to do with it: create an index of conference videos across video sites, improve the meta-data, transcriptions, subtitles, feeds, etc. I remember he patiently listened to me and then said something along the lines of how it was a good thing to work on. I really appreciated that moment of validation. I think about it periodically. It was one of the reasons Sheila and I worked hard to transition PyVideo to a new group after we were burned out.

Catfish 1.4.6 Released

Filed under
Software
  • Catfish 1.4.6 Released, Now an Xfce Project

    It’s a great day for fans of the fast and powerful Catfish search utility. With the 1.4.6 release, Catfish now officially joins the Xfce family. Additionally, there’s been some nice improvements to the thumbnailer and a large number of bugs have been squashed.

  • Catfish Search Utility Joins The Xfce Project

    The Catfish search utility now officially lives under the Xfce umbrella.

    Catfish is a GTK3-based and Python 3.x written program for searching for files on the system. Catfish has long been common to Xfce desktop systems and complementary to the Thunar file manager. The Catfish 1.4.6 release was made this weekend and with this version has now officially become part of the Xfce project.

Games: Kubifaktorium, Don't Bite Me Bro!, Mr. Prepper, Ravenfield, Victory At Sea Pacific, MoonQuest, City Game Studio, Scrunk

Filed under
Gaming

ReactOS 0.4.9 Available For Download

Filed under
OS

ReactOS 0.4.9 has been working on various kernel improvements, better Win32 compatibility / regression fixes, various DLL enhancements, pulling in some updated DLLs from Wine-Staging, and a variety of other improvements. The extensive technical list of changes for ReactOS 0.4.9 can be found via this Wiki page.

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Licensing With GPL: Greater Certainty

Filed under
GNU
Red Hat
Legal
  • A Movement Builds as a Diverse Group of 14 Additional Leaders Seek Greater Predictability in Open Source Licensing

    Today’s announcement demonstrates the expanded breadth and depth of support for the GPL Cooperation Commitment. Companies adopting the commitment now span geographic regions, include eight Fortune 100 companies, and represent a wide range of industries from enterprise software and hardware to consumer electronics, chip manufacturing to cloud computing, and social networking to automotive. The companies making the commitment represent more than 39 percent of corporate contributions to the Linux kernel, including six of the top 10 corporate contributors.1

  • ARM: Arm joins industry leaders in commitment to fair enforcement of open source licenses

    Today, Red Hat announced that several leading technology companies, including Arm, are joining a diverse coalition of organizations that have come together to promote greater predictability in open source license enforcement. Alongside Amazon, Canonical, Linaro, Toyota, VMware and many others we have committed to ensure fair opportunity for our licensees to correct errors in compliance with their GPL and LGPL licensed software before taking action to terminate the licenses.

  • Debian "stretch" 9.5 Update Now Available, Red Hat Announces New Adopters of the GPL Cooperation Commitment, Linux Audio Conference 2018 Videos Now Available, Latte Dock v0.8 Released and More

    Red Hat announced that 14 additional companies have adopted the GPL Cooperation Commitment, which means that "more than 39 percent of corporate contributions to the Linux kernel, including six of the top 10 contributors" are now represented. According to the Red Hat press release, these commitments "reflect the belief that responsible compliance in open source licensing is important and that license enforcement in the open source ecosystem operates by different norms." Companies joining the growing movement include Amazon, Arm, Canonical, GitLab, Intel Corporation, Liferay, Linaro, MariaDB, NEC, Pivotal, Royal Philips, SAS, Toyota and VMware.

Opinion: GitHub vs GitLab

Filed under
Development
Microsoft

So, Microsoft bought GitHub, and many people are confused or worried. It's not a new phenomenon when any large company buys any smaller company, and people are right to be worried, although I argue that their timing is wrong. Like Microsoft, GitHub has made some useful contributions to free and open-source software, but let's not forget that GitHub's main product is proprietary software. And, it's not just some innocuous web service either; GitHub makes and sells a proprietary software package you can download and run on your own server called GitHub Enterprise (GHE).

Let's remember how we got here. BitMover made a tool called BitKeeper, a proprietary version control system that allowed free-of-charge licenses to free software projects. In 2002, the Linux kernel switched to using BitKeeper for its version control, although some notable developers made the noble choice to refuse to use the proprietary program. Many others did not, and for a number of years, kernel development was hampered by BitKeeper's restrictive noncommercial licenses.

In 2005, Andrew Tridgell, working at OSDL, developed a client that bypassed this restriction, and as a result, BitMover removed licenses to BitKeeper from all OSDL employees—including Linus Torvalds. Eventually, all non-commercial licenses were stopped, and new licenses included clauses preventing the development of alternative version control systems. As a result of this, two new projects were born: Mercurial and Git. Created in a few short weeks in 2005, Git quickly became the version control system for Linux development.

Proprietary version control tools aren't common in free software development, but proprietary collaboration websites have been around for some time. One of the earliest collaboration websites still around today is Sourceforge. Sourceforge was created in the late 1990s by VA Software, and the code behind the project was released in 2000.

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Comparing Latencies and Power consumption with various CPU schedulers

Filed under
Graphics/Benchmarks
Ubuntu

The low-latency kernel offering with Ubuntu provides a kernel tuned for low-latency environments using low-latency kernel configuration options. The x86 kernels by default run with the Intel-Pstate CPU scheduler set to run with the powersave scaling governor biased towards power efficiency.

While power efficiency is fine for most use-cases, it can introduce latencies due to the fact that the CPU can be running at a low frequency to save power and also switching from a deep C state when idle to a higher C state when servicing an event can also increase on latencies.

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csplit: A Better Way to Split File in Linux Based on its Content

Filed under
Linux

Learn some practical examples of the GNU coreutils csplit command for splitting files in Linux. It’s more useful than the popular split command.
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today's leftovers

Filed under
Misc
  • GNOME's Nautilus Port To GTK4 Making Progress

    While GTK4 likely isn't coming out until next spring, the Nautilus file manager port to this updated tool-kit is well underway.

    GNOME contributor Ernestas Kulik has provided an update on the porting effort of Nautilus to GTK+ 4. Nautilus is now building under GTK4 and can run, but a lot of work remains.

  • Ubuntu’s Snap Apps Website Gets Much Needed Improvements

    Canonical, Ubuntu’s parent company, is pushing aggressively for the adoption of its universal packaging system Snap. And in the same bid, it has improved the user interface and user experience of its online Snap application store.

    Snap applications are a new kind of s self-contained, containerized applications. They contain most of the dependencies inside it and are confined from the operating system and other applications through security mechanisms. In other words, Snaps are more secure by design but they are bigger in size and take longer to load than the regular Linux applications.

  • This Week in Lubuntu Development #7

    Here is the seventh issue of This Week in Lubuntu Development. You can read the last issue here.

  • Microsoft Is Working On Android Smartphones; Could Be Launched Soon
  • Luxoft joins Daimler in software for next-gen cars

    The centre is looking for QA Automation Engineers with expertise in Python, Manual QA Engineers with DevOps principles knowledge, Software Developers with Linux Embedded Expertise, C++, Qt and Tools and Automation Engineer, with Jenkins, Git and Unix systems knowledge

  • Global Open Source Services Market by Type, Stage, End-User

Linux Audio Conference and GUADEC

Filed under
Linux
GNOME
  • Linux Audio Conference Team: All videos now available

    The title says it all: We have finally finished up on the remaining videos.

    You can find them all either linked on the respective event pages in the schedule or in the collection of videos on media.ccc.de (linked to in the menu).

    Due to holidays and other things in life, releasing the few remaining videos (mainly concerts, a few workshops and the keynote) took longer than anticipated. We hope they're worth the wait and are sure you will be able to enjoy them!

  • Linux Audio Conference 2018 Videos Available For Your Enjoyment

    Taking place last month at Berlin's C-Base was the sixteenth Linux Audio Conference. The 2018 Linux Audio Conference focused on everything from different open-source sound projects to different multimedia tools and more.

  • GUADEC 2018 Almería

    I recently attended the recent GNOME Users and Developers European Conference (GUADEC) in Almería, Spain. This was my fifth GUADEC and as always I was able to attend thanks to my employer Canonical paying for me to be there. This year we had seven members of the Ubuntu desktop team present. Almería was a beautiful location for the conference and a good trade for the winter weather I left on the opposite side of the world in New Zealand.

today's howtos

Filed under
HowTos

Red Hat News

Filed under
Red Hat
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More in Tux Machines

today's howtos

Android Leftovers

How to play Windows games in Linux

Game developers are increasingly taking advantage of the growing market in Linux gaming, but that’s not always been the case, and even now some games aren’t released outside of Windows. Thanks to a clever tool called Wine, though, you can run many Windows games—and other apps, including Office—as though they were native to Linux. Wine provides a skeletal virtual version of Windows, inside which you install extra components and perform various tweaks (for example, selecting which version of Windows you want to emulate) to get your app working. Sadly, it’s not a silver bullet that will get all your Windows games working in Linux, but it should be able to give you access to at least some of them. Read more

How to enable developer mode on a Chrome OS tablet (and install Linux using Crouton)

Google’s Chrome OS is designed to be a relatively secure, simple operating system that’s easy to use and hard to mess up. But you can run stable channel, beta channel, or dev channel software on any Chromebook depending on whether you want the safest experience or buggy, bleeding-edge features. There’s also an option called Developer Mode, which is different from the dev channel. It allows you to access files and settings that are normally protected and use a command shell to explore the system. It’s designed for developers and advanced users only, since it increases the chances that you’ll break your Chromebook. But enabling Developer Mode is also a prerequisite for using one my favorite Chrome OS hacks: a tool called Crouton that allows you to install Ubuntu or another GNU/Linux distribution and run it alongside Chrome OS. Read more