Access to main memory from the processor is mediated (and accelerated) by the L2 and L3 memory caches; developers working on performance-critical code quickly learn that cache utilization can have a huge effect on how quickly an application (or a kernel) runs. But, as Fenghua Yu noted in his LinuxCon Japan 2016 talk, the caches are a shared resource, so even a cache-optimal application can be slowed by an unrelated task, possibly running on a different CPU. Intel has been working on a mechanism that allows a system administrator to set cache-sharing policies; the talk described the need for this mechanism and how access to it is implemented in the current patch set.
If your familiarity with Bitcoin and Blockchain is limited to having heard about the trial of Silk Road’s Ross Ulbricht, you can be forgiven -- but your knowledge is out of date. Today, Bitcoin and especially Blockchain are moving into the mainstream, with governments and financial institutions launching experiments and prototypes to understand how they can take advantage of the unique characteristics of the technology.
Cybik comes back on how he came to know and use Linux in the first place, his gaming habits, how he got involved into the Skullgirls port, and shares with us his outlook on the Linux gaming landscape. The podcast is just an hour long and you can either download it below, and use our RSS feed (that has the additional benefit of making it easy for you to get new episodes from now on):
It’s been a while since I wrote a post here. A lot has happened since then. Now Gnome-games fully supports PlayStation games, with snapshoting capabilities. The next thing I’m working on is multi-disc support, specially for PlayStation titles. So far, there’s a working propotity although a lot needs to be re-engineered and polished. This last part of the project has involved working both in UI, persistance and logic layers.
In the not so distant past, Solus followed a static point release model. Our most current release at this time is 1.2, with a 1.2.1 planned to drop in the near future. However, we also recently announced our move to a rolling release model. As such, these two schools of thought are in contradiction of one another.
On the heels of Oracle’s July 2016 security updates for Java 8, the icedtea folks have released version 3.1.0 of their build framework so that I could create packages for OpenJDK 8u101_b13 or “Java 8 Update 101 Build 13” (and the JRE too of course).
I decided to do an update of my “pipelight” package. I had not looked at it for a long time, basically because I do not use it anymore, but after I upgraded my “wine” package someone asked if I could please write up what could be done for wine-pipelight.
As you know, pipelight is a Linux plugin wrapper for Mozilla-compatible browsers which lets you install and use Windows plugins on Linux. This configuration enables you to access online services which would otherwise be unavailable to you on a Linux platform. The pipelight plugin wrapper uses wine to load the Windows software.
Cloud computing is fast growing in the world of computer and Internet technology, many companies, organizations and even individuals are opting for shared pool of computing resources and services. For starters, Cloud computing is a type of Internet-based computing where users consume hosted services on shared server resources.
There are fundamentally three types of cloud computing available today: private, public and hybrid cloud computing.
Future Cert, the UK and Ireland representative for the LPI (Linux Professional Institute), is calling for more awareness of Open Source software training amongst the under 21s and especially women, which the industry is so desperately in need of.
New figures from a recent Future Cert student survey reveals that the number of women and young people taking LPI Certification in Open Source computing remains extremely low.
Of those questioned, 98% were male, and just 2% were female, taking an LPI exam. This figure is significantly less than an already low figure of around 15% to 17% of women in IT careers in general. It raises the question, what does the industry need to do to make an Open Source career attractive to women?
Checkpoint/Restore In Userspace, or CRIU, is a software tool for Linux that allows freezing a running application (or part of it) and checkpointing it to disk as a collection of files. The files can then be used to restore and run the application from the point where it was frozen. The distinctive feature of the CRIU project is that it is mainly implemented in user space.
Back in 2012, when Andrew Morton accepted the first checkpoint/restore (C/R) patches to the Linux kernel, the idea to implement saving and restoring of running processes in user space seemed kind of crazy. Yet, four years later, not only is CRIU working, it has also attracted more and more attention. Before CRIU, there had been other attempts to implement checkpoint/restore in Linux (DMTCP, BLCR, OpenVZ, CKPT, and others), but none were merged into the mainline. Meanwhile CRIU survived, which attests to its viability. Some time ago, I implemented support for the Test Anything Protocol format into the CRIU test runner; creating that patch allowed me to better understand the nature of the CRIU testing process. Now I want to share this knowledge with LWN readers.
The CRIU tests are quite easy to use and available for everyone. Moreover, the CRIU team has a continuous-integration system that consists of Patchwork and Jenkins, which run the required test configurations per-patch and per-commit. Patchwork also allows the team to track the status of patch sets to make the maintainer's work easier. The developers from the team always keep an eye on regressions. If a commit breaks a tree, the patches in question will not be accepted.
Chat app Wire has been rapidly adding feature as of late as it looks to gain some traction against the myriad of competitors out there. The latest trick in its arsenal is screen sharing.
Now you can click on the new screen-sharing button to, well, share your screen during a call (if you’re on a desktop, that is). It works during group chats too and, as with all Wire communications, is encrypted end-to-end. Wire believes it’s the first messaging app to include end-to-end encryption.
Software in the Public Interest (SPI) has completed its 2016 board elections. There were two open seats on the board in addition to four board members whose terms were expiring. The six newly elected members of the board are Luca Filipozzi, Joerg Jaspert, Jimmy Kaplowitz, Andrew Tridgell, Valerie Young, and Martin Zobel-Helas. The full results, including voter statistics, are also available.
Software Freedom Kosova is an annual international conference in Kosovo organized to promote free/libre open source software, free culture and open knowledge, now in its 7th edition. It is organized by FLOSSK, a non governmental, not for profit organization, dedicated to promote software freedom and related philosophies.
Medicines for Malaria Venture, a nonprofit group based in Geneva, Switzerland, distributed 400 diverse compounds with antimalarial activity — called the Malaria Box — to 200 labs in 30 nations in late 2011. The findings from subsequent studies and analyses were published Thursday in the journal PLOS Pathogens.
Distributing the Malaria Box to various labs enabled scientists to analyze the compounds and develop findings that have led to more than 30 new drug-development projects for a variety of diseases.
As a stipulation to receiving the samples, the various research groups had to deposit the information from their studies in the public domain.
The 3D printing community has already successfully taken over the market for cosmetic prostheses, as fantastic initiatives like E-NABLE have proven. But the world of bionics is a different place and just a handful of makers have gone there with any form of success, such as the very inspiring Open Bionics. But even 3D printed bionic prostheses are definitely within our reach, as French open source fanatic Nicolas Huchet of Bionico has proven. Though by no means a making expert himself, he 3D printed his own open source bionic hand during a three month residency at FabLab Berlin and has now shared all the files – including an extensive tutorial – online. This means you can now 3D print your very own bionic prosthesis at home for just $700.
Designed from scratch and developed by BCN3D engineers in collaboration with the Generalitat de Catalunya’s Departament d’Ensenyament (Department of Education), the BCN3D Moveo is an Arduino Mega 2560-powered, 3D printed robotic arm which could enable schools and colleges in Spain and elsewhere to teach students the basics of robotics, mechanical design, and industrial programming. When the Departament d’Ensenyament approached BCN3D one year ago regarding the possibility of an educative robotics project, the tech organization jumped at the chance to get on board.