Month: September 2024

Enlarge / Cutting metal with lasers is hard, but even harder when you don't know the worst-case timings of your code. (credit: Getty Images)

As is so often the case, a notable change in an upcoming Linux kernel is both historic and no big deal.

If you wanted to use "Real-Time Linux" for your audio gear, your industrial welding laser, or your Mars rover, you have had that option for a long time (presuming you didn't want to use QNX or other alternatives). Universities started making their own real-time kernels in the late 1990s. A patch set, PREEMPT_RT, has existed since at least 2005. And some aspects of the real-time work, like NO_HZ, were long ago moved into the mainline kernel, enabling its use in data centers, cloud computing, or anything with a lot of CPUs.

But officialness still matters, and in the 6.12 kernel, PREEMPT_RT will likely be merged into the mainline. As noted by Steven Vaughan-Nichols at ZDNet, the final sign-off by Linus Torvalds occurred while he was attending Open Source Summit Europe. Torvalds wrote the original code for printk, a debugging tool that can pinpoint exact moments where a process crashes, but also introduces latency that runs counter to real-time computing. The Phoronix blog has tracked the progress of PREEMPT_RT into the kernel, along with the printk changes that allowed for threaded/atomic console support crucial to real-time mainlining.

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  The PS5 Pro version of the 30th anniversary bundle comes with both varieties of DualSense controller, a plate for an (optional) optical drive, and other accessories. [credit: Sony ]

Sony launched the original PlayStation console in Japan on December 3, 1994, and Sony isn't letting the 30th anniversary pass by quietly. Today the company has announced limited-edition versions of both the PS5 and PS5 Pro with gray plastic shells and multicolored PlayStation logos, inspired by the gray plastic shells of the original. The retro-inspired modern consoles will be released on November 21 and will be available for preorder starting September 26 from Sony's direct.playstation.com site.

Sony is also releasing DualSense and DualSense Edge controllers with gray shells and colorful PS logo buttons and a gray version of the Switch-esque PlayStation Portal streaming console. Sony says that the limited-edition PS5 Pro will be limited to 12,300 units—a reference to the December 3 launch date—but didn't mention any specific manufacturing numbers for the regular PS5, either DualSense controller design, or the PlayStation Portal.

Both console bundles also come with a handful of other accessories: a PS logo sticker, a PS logo paperclip, cable ties, and (my personal favorite) a regular USB-C cable with a giant, chunky PS1-style controller connector on one end.

Enlarge (credit: Ben Orlin)

Math teacher Ben Orlin writes and draws the (aptly named) blog Math With Drawings and is the author of a new book, Math for English Majors: A Human Take on the Universal Language. To mark its publication, he devised this entertaining accompanying quiz. You can read the Ars interview with Orlin here.

Math, we like to say, is math. It often seems that mathematics is something beyond our control—something unyielding, universal, inhuman.

But is it really?

Enlarge / Math for English Majors talks about numbers as nouns, verbs as calculations, and algebra as grammar. (credit: Ben Orlin)

Galileo once famously described the universe as a great book "written in mathematical language and its characters are triangles, circles, and other geometrical figures." Unfortunately, it's a language that many people outside of math and science simply do not speak, largely because they are flummoxed and/or intimidated by the sheer density of all that strange symbolic notation.

Math teacher extraordinaire Ben Orlin is here to help with his latest book: Math for English Majors: A Human Take on the Universal Language. And just like Orlin's previous outings, it's filled with the author's trademark bad drawings. Bonus: Orlin created a fun personality quiz, which you can take here to find out your mathematical style.

Orlin's first book, Math with Bad Drawings, after his blog of the same name, was published in 2018. It included such highlights as placing a discussion of the correlation coefficient and "Anscombe's Quartet" into the world of Harry Potter and arguing that building the Death Star in the shape of a sphere may not have been the Galactic Empire's wisest move. We declared it "a great, entertaining read for neophytes and math fans alike, because Orlin excels at finding novel ways to connect the math to real-world problems—or in the case of the Death Star, to problems in fictional worlds."

Enlarge / Artist's conception of what used to be possible, before BattlEye ruined things.

Last week, Rockstar added BattlEye support to Grand Theft Auto V, offering some much-needed anti-cheat protection for the game's highly successful GTA Online multiplayer mode. That anti-cheat support wasn't welcome news for Steam Deck players, though, who now get confronted with an error when trying to log in to GTA Online.

According to Valve, though, Rockstar could solve this minor technical issue with a single email.

In both a Steam Community update and a Rockstar Support FAQ, the developer notes that "Steam Deck does not support BattlEye for GTA Online. You will be able to play GTAV Story Mode but unable to play GTA Online." As such, GTA V's Steam page now lists the game as "Unsupported" for Steam Deck users, because "the game's anti-cheat is not configured to support Steam Deck."

Enlarge (credit: J Studios via Getty Images)

If you haven't noticed by now, Big Tech companies have been making plans to invest in the infrastructure necessary to deliver generative AI products like ChatGPT (and beyond) to hundreds of millions of people around the world. That push involves building more AI-accelerating chips, more data centers, and even new nuclear plants to power those data centers, in some cases.

Along those lines, Microsoft, BlackRock, Global Infrastructure Partners (GIP), and MGX announced a massive new AI investment partnership on Tuesday called the Global AI Infrastructure Investment Partnership (GAIIP). The partnership initially aims to raise $30 billion in private equity capital, which could later turn into $100 billion in total investment when including debt financing.

The group will invest in data centers and supporting power infrastructure for AI development. "The capital spending needed for AI infrastructure and the new energy to power it goes beyond what any single company or government can finance," Microsoft President Brad Smith said in a statement.