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Kernel: Threading, Streebog, USB 3.0, "Thermal Pressure" and More

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Linux
  • A Look At Linux Application Scaling Up To 128 Threads

    Arriving last week in our Linux benchmarking lab was a dual EPYC server -- this Dell PowerEdge R7425 is a beast of a system with two AMD EPYC 7601 processors yielding a combined 64 cores / 128 threads, 512GB of RAM (16 x 32GB DDR4), and 20 x 500GB Samsung 860 EVO SSDs. There will be many interesting benchmarks from this server in the days and weeks ahead. For some initial measurements during the first few days of stress testing this 2U rack server, here is a look at how well various benchmarks/applications are scaling from two to 128 threads.

  • Linux Kernel Patches Posted For Streebog - Crypto From Russia's FSB

    Just months after the controversial Speck crypto code was added to the Linux kernel that raised various concerns due to its development by the NSA and potential backdoors, which was then removed from the kernel tree, there is now Russia's Streebog that could be mainlined.

    The Streebog cryptographic hash was developed by Russia's controversial FSB federal security service and other Russian organizations. Streebog is a Russian national standard and a replacement to their GOST hash function. Streebog doesn't have as much controversy as NSA's Speck, but then again it's not as well known but there is are some hypothetical attacks and some papers have questioned some elements of the design. Streebog is considered to be a competitor to the SHA-3 standard from the NIST.

  • The Linux Kernel In 2018 Finally Deems USB 3.0 Ubiquitous Rather Than An Oddity

    The latest news in the "it's about darn time" section is the Linux kernel's default i386/x86_64 kernel configurations will finally ship with USB 3.0 support enabled, a.k.a. CONFIG_USB_XHCI_HCD.

    For many years now pretty much all Linux distribution vendor kernels have been shipping with CONFIG_USB_XHCI_HCD enabled either built-in or as a module... But built-in is pretty much the best to avoid potential issues at start-up time. As of this week, CONFIG_USB_XHCI_HCD=y is finally set for the default configurations on the x86/x86_64-based kernel builds should you be spinning up a defconfig kernel.

  • "Thermal Pressure" Kernel Feature Would Help Linux Performance When Running Hot

    Linaro engineer Thara Gopinath sent out an experimental set of kernel patches today that introduces the concept of "thermal pressure" to the Linux kernel for helping assist Linux performance when the processor cores are running hot.

    While the Linux CPU frequency scaling code already deals with the event of CPU core(s) overheating as to downclock/limit the frequency, the kernel's scheduler isn't currently aware of the CPU capacity restrictions put in place due to that thermal event.

  • Containers are Linux

    Linux is the core of today’s operating system open source software development, and containers are a core feature of Linux. Linux containers and the Kubernetes community supporting them enable agencies to quickly stand up, distribute and scale applications in the hybrid clouds supporting the IT architecture of today’s digitally transformed government.

    But agencies need more than the speed and flexibility of containers and the power of Kubernetes to take full advantage of today’s hybrid cloud environment. They need open source enterprise software with full lifecycle support and a full complement of hardware certifications to ensure portability across platforms.

More in Tux Machines

GNOME: Restyling, Geoclue and Outreachy

  • Restyling apps at scale
    Over the past few months we’ve had a lively debate about “theming” in GNOME, and how it affects our ecosystem. In this discussion I’ve found that there is a divide between people who design and/or develop apps, and people who don’t. I have yet to see an app developer who thinks the current approach to “theming” can work, while many people who aren’t app developers are arguing that it can. After a few long discussions I started to realize that part of the reason why there’s so little agreement and so much drama around this issue is that we don’t agree what the problem is. Those who don’t work on apps often can’t see the issues with theming and think we want to remove things for no reason, while those who do are very frustrated that the other side doesn’t want to acknowledge how broken everything is.
  • Geoclue 2.5 & repeating call for help
    Also, while I'm at it, I wanted to highlight the "call for help" at the end of that post by repeating it here again. I apologize of repeating to those who already read it but a friend pointed out that it's likely going to be missed by many folks: The future of Mozilla Location Service When Mozilla announced their location service in late 2013, Geoclue became one of its first users as it was our only hope for a reliable WiFi-geolocation source. We couldn't use Google's service as their ToC don't allow it to be used in an open source project (I recall some clause that it can only be used with Google Maps and not any other Map software). Mozilla Location Service (MLS) was a huge success in terms of people contributing WiFi data to it. I've been to quite a few places around Europe and North America in the last few years and I haven't been to any location, that is not already covered by MLS.
  • Making a first contribution in Outreachy usability testing
    If you want to join us in GNOME usability testing as part of the upcoming cycle in Outreachy, you'll need to make a first contribution as part of your application process. Every project in Outreachy asks for a first contribution; this is a requirement in Outreachy. Don't make too big of a deal about your first contribution in usability testing. We don't expect interns to know much about usability testing as they enter the internship. Throughout the internship, you'll learn about usability testing. So for this first contribution, we set a low bar.

Kali Linux: What You Must Know Before Using it

Kali Linux is the industry’s leading Linux distribution in penetration testing and ethical hacking. It is a distribution that comes shipped with tons and tons of hacking and penetration tools and software by default, and is widely recognized in all parts of the world, even among Windows users who may not even know what Linux is. Because of the latter, many people are trying to get alone with Kali Linux although they don’t even understand the basics of a Linux system. The reasons may vary from having fun, faking being a hacker to impress a girlfriend or simply trying to hack the neighbors’ WiFi network to get a free Internet, all of which is a bad thing to do if you are planning to use Kali Linux. Read more

Kernel: Qualcomm/Atheros "Ath10k", FUSE and Code of Conduct

  • Linux's Qualcomm Ath10k Driver Getting WoWLAN, WCN3990 Support
    The Qualcomm/Atheros "Ath10k" Linux driver coming up in the Linux 4.20~5.0 kernel merge window is picking up two prominent features. First up, the Ath10k driver is finally having WoWLAN support -- Wake on Wireless LAN. WoWLAN has been supported by the kernel for years and more recently is getting picked up by Linux networking user-space configuration utilities. Ath10k is becoming the latest Linux wireless driver supporting WoWLAN (WIPHY_WOWLAN_NET_DETECT) for automatically waking up the system when within range of an a known SSID.
  • FUSE File-Systems Pick Up Another Performance Boost With Symlink Caching
    FUSE file-systems in user-space are set to be running faster with the upcoming Linux 4.20~5.0 kernel thanks to several performance optimizations. The FUSE kernel code for this next Linux kernel cycle already has a hash table optimization and separately is copy file range support for efficient file copy operations. Staged today into the FUSE tree for the next cycle was yet another performance-boosting patch.
  • Another Change Proposed For Linux's Code of Conduct
    With the Linux 4.19-rc8 kernel release overnight, one change not to be found in this latest Linux 4.19 release candidate are any alterations to the new Code of Conduct. The latest proposal forbids discussing off-topic matters while protecting any sentient being in the universe. While some immediate changes to the Linux kernel Code of Conduct have been talked about by upstream kernel developers, for 4.19-rc8 there are no changes yet. We'll presumably see some basic changes land this week ahead of Linux 4.19.0 expected next Sunday as not to have an unenforceable or flawed CoC found in a released kernel version.

Plasma 5.14 – Phasers on stun

Linux is much like the stock market. Moments of happiness broken by crises. Or is the other way around? Never mind. Today shall hopefully be a day of joy, for I am about to test Plasma 5.14, the latest version of this neat desktop environment. Recently, I’ve had a nice streak of good energy with Linux, mostly thanks to my experience with Slimbook Pro2, which I configured with Kubuntu Beaver. Let’s see if we can keep the momentum. Now, before we begin, there are more good news woven into this announcement. As you can imagine, you do need some kind of demonstrator to test the new desktop. Usually, it’s KDE neon, which offers a clean, lean, mean KDE-focused testing environment. You can boot into the live session, try the desktop, and if you like it, you can even install it. Indeed, neon is an integral part of my eight-boot setup on the Lenovo G50 machine. But what makes things really interesting is that neon has also switched to the latest Ubuntu LTS base. It now comes aligned to the 18.04 family, adorned with this brand new Plasma. Proceed. Read more