Mastodawn

Tobin Baker 11h ago

EC shuts off AC for their staffers, keeps it on for themselves

https://www.politico.eu/article/eu-commission-heatwave-hq-forced-shut-down-air-conditioning-europe/

EU Commission HQ forced to shut down air-conditioning amid heatwave

As Brussels bakes, the Berlaymont building’s AC stops working.

POLITICO

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Tobin Baker 2d ago

@pkhuong @steve @regehr to clarify, I’m only doing SIMD ops with the same lane width as the atomic type’s width, intel manuals suggest this is enough for non-torn lane reads (obv the whole vector will be torn)

Tobin Baker 2d ago

So I'm trying to figure out if there's a UB-free way to do SIMD loads over an array of `std::atomic<uint64_t>` (all writes are via CAS, this is a concurrent bitmap). From what I can tell either placing `atomic_thread_fence(mo_acq)` before the SIMD load or just marking the SIMD type `volatile` should work? Not sure if the codegen will be equivalent tho, esp. at higher optimization levels. Before I head off to godbolt, is this a doomed quest?
@regehr @pkhuong @steve

Tobin Baker 2d ago

Greg Egan 2d ago

Lots of regrettable silliness here: two papers by Max Planck (!) have been retracted, probably by some automated process that based the decision on the same material appearing in another journal (which was far more common at the time, and even Einstein did it) and a rebuttal to a work being published under the same title (but not author) as the thing being rebutted.

But the funniest line in the article is:

“Springer Nature is nevertheless still selling the empty PDF for $39.95.”

https://www.science.org/content/article/why-have-papers-one-history-s-most-famous-physicists-been-retracted

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Tobin Baker 3d ago

Oh I missed Wallonia!

Tobin Baker 3d ago

"die Gans an sich", as Kant would say

Tobin Baker 3d ago

I just conjectured that "Wallach" and "Welsh" were derived from the same Proto-Germanic root ("Walhaz": "foreigner") and it turns out I was right!

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Tobin Baker 3d ago

More explicitly: I’m suggesting Dm->Gm6->A7->B-flat

Tobin Baker 3d ago

Not to second-guess Bach or anything, but in the first bars of the Chaconne in D Minor, try modulating early to the B-flat chord: from A7 instead of from D minor. Personally, I think it sounds awesome. It’s also the same change in “Goodbye Yellow Brick Road” at “huntin’ the horny back toad”: A7->B-flat.

Tobin Baker 4d ago

Returning from Alaska to the Seattle area tomorrow, not looking forward to it (no A/C).