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Proprietary Web and Vista 11 Performance Catastrophe

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  • Client-side content scanning as an unworkable, insecure disaster for democracy • The Register

    Fourteen of the world's leading computer security and cryptography experts have released a paper arguing against the use of client-side scanning because it creates security and privacy risks.

    Client-side scanning (CSS, not to be confused with Cascading Style Sheets) involves analyzing data on a mobile device or personal computer prior to the application of encryption for secure network transit or remote storage. CSS in theory provides a way to look for unlawful content while also allowing data to be protected off-device.

    Apple in August proposed a CSS system by which it would analyze photos destined for iCloud backup on customers' devices to look for child sexual abuse material (CSAM), only to backtrack in the face of objections from the security community and many advocacy organizations.

    The paper [PDF], "Bugs in our Pockets: The Risks of Client-Side Scanning," elaborates on the concerns raised immediately following Apple's CSAM scanning announcement with an extensive analysis of the technology.

  • Vivaldi Adblock is mostly Adblock Plus and ublock-origin.

    The Vivaldi browser has a built-in ad blocker.

    However, the company hasn’t been extremely forthcoming about how it works.

    However, it seems to accept any list in adblock plus format, and Vivaldi seems to have implemented Webkit Content Blockers as well.

    Vivaldi includes a list called “DuckDuckGo Tracker Radar”, which leads to what seems to be a Webkit Content Blocker format list mirrored by Vivaldi.

    In my testing, the DuckDuckGo Tracker Radar seems to largely duplicate what Fanboy’s Ultimate List already had in it.

    While Fanboy’s Ultimate List is not in Vivaldi by default, you can add it by going to Vivaldi Menu/Settings/Privacy, and then select “Block Trackers and Ads”, and then I would suggest de-selecting everything in both columns that Vivaldi defaults to having on, then clicking + under Ad Blocking Sources, then adding https://www.fanboy.co.nz/r/fanboy-ultimate.txt and then Import. It should tell you it brought in a bunch of ad blocking rules.

  • This week's Windows 11 patch didn't fix AMD performance woes • The Register

    Windows 11 received its first bundle of fixes this week, but AMD users hoping for respite from performance issues that have dogged their PCs were to be disappointed. In fact, for some, performance might have actually got a bit worse.

    It wasn't the news AMD fangirls and fanboys were hoping for. After AMD noted performance issues with Microsoft's latest operating system, a fix had been expected to drop during October. Alas, that fix didn't turn up in this week's first Cumulative Update for the GA code. In fact, according to hardware site TechPowerUp, things might have even deteriorated.

  • Microsoft’s first Windows “11” update addresses AMD CPU scheduling problems. Ends up making them worse. – BaronHK's Rants

    Microsoft released their first “Windows 11” update.

    It was deployed to try to correct the AMD CPU problems that Windows “11” created on Ryzen, which tripled L3 CPU cache latency and slowed the processor down by an average of 15%.

    The update ended up making the problem worse. Doubling the cache latency from where it already was at launch.

    “Early adopters” of Microsoft’s latest broken operating system are seeing much worse performance than they were on Windows 10, even on the Intel side, as Microsoft’s “virtualization based security” was already wreaking havoc on video game performance.

  • The "What If" Performance Cost To Kernel Page Table Isolation On AMD CPUs - Phoronix

    Made public this week by CPU security researchers at Graz University of Technology and CISPA Helmholtz Center for Information Security was the research paper published "AMD Prefetch Attacks through Power and Time". The paper points to AMD CPUs suffering from a side-channel leakage vulnerability through timing and power variations of the PREFETCH instruction. The paper argues that AMD CPUs should activate stronger page table isolation by default. AMD has now published their security response where they are not recommending any mitigation changes at this time. But what if Kernel Page Table Isolation (KPTI/PTI) proves necessary for AMD CPUs? Here are some initial benchmarks showing what that performance impact could look like.

More in Tux Machines

Audiocasts/Shows: Late Night Linux, Destination Linux, and More

Kernel: Slowdown, CephFS, and FS-Cache / CacheFiles

  • How a performance boost in Linux kernel for one family of Intel chips slowed its latest Alder Lake processors

    The mixture of performance and efficiency CPUs in Intel’s 12th-gen Core processors, code-named Alder Lake, hasn’t just been causing problems for some Windows gamers – it almost led to complications for Linux. Phoronix’s Michael Larabel noticed a performance hit in the kernel a fortnight ago – in a work-in-progress release candidate, we should stress – and a fix for the scheduling code landed a little later. It turned out the kernel suffered on Alder Lake chips due to a performance-enhancing tweak for another Intel processor family: the multiple-Atom-core-based Jacobsville. This year, Intel officially canned its Lakefield chips. These consisted of a performance core called Sunny Cove as well as Atom-class efficiency cores dubbed Tremont. Crucially, there are still multi-Tremont-core embedded processors out there, such as Snow Ridge. These are server and infrastructure-oriented components with up to 24 cores. The first proposed cut of kernel 5.16, specifically 5.16-rc1, contained a revision to the scheduler that makes it aware that some clusters of cores share a block of L2 cache – as seen in Snow Ridge and Jacobsville.

  • Testing the Linux Kernel CephFS Client with xfstests

    I do a lot of testing with the kernel cephfs client these days, and have had a number of people ask about how I test it. For now, I’ll gloss over the cluster setup since there are other tutorials for that.

  • Major Rewrite Of Linux's FS-Cache / CacheFiles So It's Smaller & Simpler - Phoronix

    As part of David Howells of Red Hat long-term work on improving the caching code used by network file-systems, he today posted a big patch series rewriting the fscache and cachefiles code as the latest significant step on that adventure. Howells posted a set of 64 patches for rewriting the kernel's fscache and cachefiles code. Linux's fsache is a general purpose cache used by network file-systems while cachefiles is for providing a caching back-end for mounted local file-systems. The Red Hat engineer has been working on this rewrite for more than the past year.

Ubuntu Weekly Newsletter and Ubuntu Desktop on Google Clown

  • Ubuntu Weekly Newsletter Issue 711

    Welcome to the Ubuntu Weekly Newsletter, Issue 711 for the week of November 21 – 27, 2021. The full version of this issue is available here.

  • Launch Ubuntu Desktop on Google Cloud

    This tutorial shows you how to set up a Ubuntu Desktop on Google Cloud. If you need a graphic interface to your virtual desktop on the cloud, this tutorial will teach you how to set up a desktop environment just like what you can get on your own computer.

Open Hardware/Modding: ESP32, 3-D Printing, Raspberry Pi Pico, PocketBeagle

  • Wireless thermal printer kit features M5Stack ATOM Lite controller - CNX Software

    This is certainly not the first ESP32 thermal printer solution, as there are various implementations including bitbank2 thermal printer Arduino connecting ESP32 and nRF52 boards to the printer over Bluetotoh LE, or a Arduino sketches to print bitmaps over serial or MQTT.

  • Generate Fully Parametric, 3D-Printable Speaker Enclosures | Hackaday

    Having the right speaker enclosure can make a big difference to sound quality, so it’s no surprise that customizable ones are a common project for those who treat sound seriously. In that vein, [zx82net]’s Universal Speaker Box aims to give one everything they need to craft the perfect enclosure.

  • Z80 Video Output Via The Raspberry Pi Pico | Hackaday

    Building basic computers from the ground up is a popular pastime in the hacker community. [Kevin] is one such enthusiast, and decided to whip up a video interface for his retro Z80 machine.

  • The Calculator Charm: Calculatorium Leviosa! | Hackaday

    Have you ever tried waving your hand around like a magic wand and summoning a calculator? We would guess not since you’d probably look a little silly doing so. That is unless you had [Andrei’s] cool gesture-controlled calculator. [Andrei] thought it would be helpful to use a calculator in his research lab without having to take his gloves off and the results are pretty cool. His hardware consists of a PocketBeagle, an OLED, and an MPU6050 inertial measurement unit for capturing his hand motions using an accelerometer and gyroscope. The hardware is pretty straightforward, so the beauty of this project lies in its machine learning implementation.