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7 tools for analyzing performance in Linux with bcc/BPF

Filed under
Linux

A new technology has arrived in Linux that can provide sysadmins and developers with a large number of new tools and dashboards for performance analysis and troubleshooting. It's called the enhanced Berkeley Packet Filter (eBPF, or just BPF), although these enhancements weren't developed in Berkeley, they operate on much more than just packets, and they do much more than just filtering. I'll discuss one way to use BPF on the Fedora and Red Hat family of Linux distributions, demonstrating on Fedora 26.

BPF can run user-defined sandboxed programs in the kernel to add new custom capabilities instantly. It's like adding superpowers to Linux, on demand. Examples of what you can use it for include:

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Mesa 17.3 RC5 and Early Stages of Linux 4.15

Filed under
Graphics/Benchmarks
Linux
  • mesa 17.3.0-rc5

    The fifth release candidate for Mesa 17.3.0 is now available. This is the last planned release candidate before the final release.

    We still have a couple of regressions in our tracker [1] although I'm anticipating for those to be resolved by EOW.

  • Mesa 17.3-RC5 Released, Official Mesa 3D Update Expected By Next Week

    The Mesa 17.3 release game is in overtime but it should be wrapping up in the days ahead.

    Emil Velikov of Collabora announced the Mesa 17.3-RC5 release candidate this morning. He anticipates it being the last release candidate, but there still are a few blocker bugs open. As of writing there still are 4 bugs open with one pertaining to Gallium3D Softpipe and the others being Intel driver issues.

  • Extra KVM Changes For Linux 4.15 Bring UMIP Support, AMD SEV Changes Delayed

    As some additional work past the KVM changes for Linux 4.15 submitted last week, a few more feature items have been queued.

    The second batch of Kernel-based Virtual Machine (KVM) updates sent in today for Linux 4.15 include ARM GICv4 support, x86 bug fixes, the AMD VFIO NFT performance fix, and x86 guest UMIP support. Landing already with Linux 4.15 is Intel UMIP capabilities for User-Mode Instruction Prevention to prevent certain instructions from being executed if the ring level is greater than zero. This latest KVM pull update adds this UMIP support to its space for both real and emulated guests.

  • AMD EPYC Is Running Well On Linux 4.15

    Of the many changes coming for Linux 4.15, as detailed this weekend Radeon GPU and AMD CPU customers have a lot to be thankful for with this new kernel update currently in development. Here are some initial benchmarks of the Linux 4.15 development kernel using an AMD EPYC 7601 32-core / 64-thread setup.

    When it comes to EPYC in Linux 4.15, the kernel side-bits have landed for Secure Encrypted Virtualization (SEV), CPU temperature monitoring support now working, and improved NUMA node balancing.

LibreELEC (Krypton) v8.2.1 MR

Filed under
GNU
Linux
Movies

LibreELEC 8.2.1 is a maintenance release that includes Kodi 17.6. It also resolves a minor time-zone issue after recent daylight saving changes, a resume from suspend issue with the Apple IR driver, and it provides two new SMB client configuration options in Kodi settings. You can now set a minimum SMB protocol version to prevent prevent SMB1 from ever being used, and a ‘legacy security’ option forces weak authentication to resolve issues seen with the USB sharing functions on some older router/NAS devices. If updating to LibreELEC 8.2 for the first time PLEASE READ THE RELEASE NOTES below here before posting issues in the forums as there are disruptive changes to Lirc, Samba, and Tvheadend.

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LiFT Scholarship Recipients Advance Open Source Around the World

Filed under
Linux
OSS

Fifteen people from 13 different countries have received Linux Foundation Training Scholarships (LiFT) in the category of Linux Newbies. This year, 27 people received scholarships across all categories — the most ever awarded by the Foundation.

Now in its seventh year, the program awards training scholarships to current and aspiring IT professionals worldwide who may not otherwise have the means for specialized training. The Foundation has awarded 75 scholarships worth more than $168,000 since the program began.

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Linux Containers vs Virtual Machines

Filed under
Linux
Server

Ever since containers on Linux became popular, determining the difference between Linux containers and virtual machines has become trickier. This article will provide you with the details to understand the differences between Linux containers and virtual machines.

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Linux gizmo indexes photos and videos for visual recognition search

Filed under
Linux
Gadgets

Pimloc’s “Pholio” runs Linux on an Nvidia Tegra, and provides offline storage and search of images and video using visual and face recognition.

Digital imaging has lived up to its promise of making it easier to take more images more quickly, but the promise that it would make it easier to find those images has fallen short. Unless you spend time with an image management package and apply tags to each and every photo, it’s a pain to try to find specific images or groups of images. A new Kickstarter project called Pholio promises to skip the prep work and use visual recognition technology to quickly locate any image or video you seek.

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6-Way Enterprise Focused Linux Distribution Comparison With An Intel Core i9, Dual Xeon Gold Systems

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Linux

Here's our latest Linux distribution comparison with this time looking at the out-of-the-box performance of six Linux distributions while running a range of enterprise/workstation-focused benchmarks while using two systems. One system is a high-end Core i9 7980XE desktop system and the other a Tyan 1U Xeon Scalable server with dual Xeon Gold 6138 processors.

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Linux/Android hacker SBC with hexa-core Rockchip SoC debuts at $75

Filed under
Android
Linux
Hardware

The Vamrs “RK3399 Sapphire” SBC is on sale for $75, or $349 for a full kit. Vamrs is also prepping an RK3399-based “Rock960” 96Boards SBC.

Rockchip’s RK3399 is one of the most powerful ARM-based system-on-chips available on hacker boards, featuring two server-class Cortex-A72 cores clocked to up to 2.0GHz, as well as four Cortex-A53 at up to 1.42GHz and a quad-core Mali-T864 GPU. The hexa-core SoC has appeared on T-Firefly’s Firefly-RK3399 SBC and RK3399 Coreboard computer-on-module, as well as Videostrong’s VS-RD-RK3399 SBC and Theobroma’s RK3399-Q7 Qseven module. Now we have a new contender: Shenzhen based Vamrs, which built the limited edition Rockchip RK3399 Sapphire SBC as the official RK3399 dev board for Rockchip, is now re-launching the board, which features a 40-pin Raspberry Pi compatible connector, with “many in stock” for a discounted price of $75.

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DragonBoard gains a camera kit

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Linux

Arrow’s DragonBoard 410c Camera Kit combines the 96Boards SBC with D3’s DesignCore Camera Mezzanine Board OV5640 and a 5-megapixel camera module.

D3 Engineering’s DesignCore Camera Mezzanine Board OV5640 is a 96Boards mezzanine add-on designed to work only with the Arrow Electronics/Qualcomm DragonBoard 410c. Arrow and D3 have now launched a kit that provides a DragonBoard 410c with the D3 board and a miniature 5-megapixel autofocus camera module. The kit’s Linux software runs on the 96Boards CE SBC’s quad-core Cortex-A53 based Snapdragon 410 SoC.

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More in Tux Machines

Graphics: Mesa 17.2.6 RC, AMDGPU, and Vulkan

  • Mesa 17.2.6 release candidate
  • Mesa 17.2.6 RC Arrives With 50+ Fixes
    While Mesa 17.3 is imminent and should be released as stable within the next few days, Mesa 17.2.6 is being prepped for release as the current point release.
  • 43 More AMDGPU DC Patches Hit The Streets
    While the massive AMDGPU DC infrastructure has been merged for Linux 4.15, the flow of improvements to this display code continues and it looks like the next few kernel cycles at least could be quite busy on the AMD front.
  • A Prototype Of The Vulkan Portability Initiative: Low-Level 3D To Vulkan / D3D12 / Metal
    A Mozilla engineer has put out a prototype library in working on the Vulkan Portability Initiative for allowing low-level 3D graphics support that's backed by Vulkan / Direct3D 12 / Metal. With Apple sticking to their own Metal graphics API and Direct3D 12 still being the dominant graphics API on Windows 10, The Khronos Group has been working towards better 3D portability for where Vulkan may not be directly supported by the OS/drivers or otherwise available. They've been working to target a subset of the Vulkan API that can be efficiently mapped to these other native graphics APIs and to have the libraries and tooling for better compatibility and code re-use of these different graphics APIs.

Kernel: Linux 4.15, TLDR, and Linus Torvalds' Latest Rant

  • Linux 4.15 Adds AMD Raven Ridge Audio ID
    Not only is AMD Stoney Ridge audio (finally) being supported by the Linux 4.15 kernel, but it also looks like Raven Ridge audio should now be working too.
  • Linux 4.14.2 Fixes The BCache Corruption Bug
    Normally I don't bother mentioning new Linux kernel point releases on Phoronix unless there are some significant changes, as is the case today with Linux 4.14.2.
  • TLDR is what Linux man pages always should have been
    If you get stuck using a Linux tool, the first port of call shouldn’t be to Stack Overflow, but rather its “man pages.” Man — which is short for manual — retrieves documentation for a given program. Unfortunately, this can often be dense, hard to understand, and lacking in practical examples to help you solve your problem. TLDR is another way of looking at documentation. Rather than being a comprehensive guide to a given tool, it instead focuses on offering practical example-driven instructions of how something works.
  • Linux creator Linus Torvalds: This is what drives me nuts about IT security
    Developers are often accused of not thinking about security, but Linux kernel founder Linus Torvalds has had enough of security people who don't think about developers and end-users. After blasting some kernel developers last week for killing processes in the name of hardening the kernel, Torvalds has offered a more measured explanation for his frustration with security myopia. While he agrees that having multiple layers of security in the kernel is a good idea, certain ways of implementing it are not, in particular if it annoys users and developers by killing processes that break users' machines and wreck core kernel code. Because ultimately, if there are no users, there's not much point in having a supremely secure kernel, Torvalds contends.

Unity 7 Hoping To Become An Official Flavor For Ubuntu 18.04 LTS

While Canonical abandoned their work on the Unity desktop environment in favor of the Unity-inspired customized GNOME Shell that debuted in Ubuntu 17.10, some within the community have remained interested in maintaining Unity 7 and even getting it into an official spin/flavor of Ubuntu. Posted today to the community.ubuntu.com was a Unity maintenance roadmap, reiterating the hope by some in the Ubuntu community for Ubuntu Unity to become an official LTS distribution of Ubuntu. They are hoping to make it an official flavor alongside Kubuntu, Ubuntu Budgie, Xubuntu, and others. Read more Original/direct: Unity Maintenance Roadmap

Programming/Development: Django and Google India

  • An introduction to the Django ORM
    One of the most powerful features of Django is its Object-Relational Mapper (ORM), which enables you to interact with your database, like you would with SQL. In fact, Django's ORM is just a pythonical way to create SQL to query and manipulate your database and get results in a pythonic fashion. Well, I say just a way, but it's actually really clever engineering that takes advantage of some of the more complex parts of Python to make developers' lives easier.
  • Hey, Coders! Google India Is Offering 130,000 Free Developer Scholarships — Here’s How To Apply
  • Google to prepare 1.3 lakh Indians for emerging technologies

    "The new scholarship programme is in tandem with Google's aim to train two million developers in India. The country is the second largest developer ecosystem in the world and is bound to overtake the US by 2021," William Florance, Developer Products Group and Skilling Lead for India, Google, told reporters here.