Ernir Erlingsson

Fluctuat Nec Mergitur

[Ernir Erlingsson @ernire]

@Kasparov63 *purse..

[Ernir Erlingsson @ernire]

@Kasparov63 Too negative towards EU. Austerity is the true reason behind EU lacking. Look at Covid-19, as soon as the pursue opened Europe produced not one, but two Covid vaccines in record time

[Ernir Erlingsson @ernire]

Been checking it out now and then but Bluesky now seems to have reached enough users and maturity to be a Twitter replacement. Come over and let's all leave X behind us. Check out the Bluesky starter packs to set up quickly

[Ernir Erlingsson @ernire]

@henrythor Úfff

[Ernir Erlingsson @ernire]

@katrinat Mér skilst reyndar að Fram hafi aldrei skrifað undir afsalið af Safamýri þó svo að Víkingur væri fluttur inn út af einhverjum slag við Reykjavíkurborg varðandi uppbyggingu. Það hefur allt verið í hnút út af þessu skilst mér og þetta er væntanlega lausnin?

[Ernir Erlingsson @ernire]

@owenjonesjourno I'm all for more equality but I think you are wrong. Media consumption has changed, now the battlefield is in channels like TikTok, Facebook, and X. There extreme right messeging is winning, and not just in the USA i might add.

[Ernir Erlingsson @ernire]

@redaction My money is on him spending more time with Diablo than all of his kids and work combined

[Ernir Erlingsson @ernire]

@italivar @Fravikid Daþfep = samfélag, smá covfefe móment í gangi hjá mér 😊

[Ernir Erlingsson @ernire]

@italivar @Fravikid Þú ert þá í raun á móti fulltrúalýðræði, þar sem meirihluti ræður, ekki satt? Skólaskylda barna og þjóðkirkja eru því samkvæmt þinni rökfræði af hinu illa og merki um sjúkt daþfep, ekki satt?

[Ernir Erlingsson @ernire]

@italivar @Fravikid En hvort ertu að tala um að leggja ríkið niður, draga úr því, eða breyta fjármögnun þess?

[Ernir Erlingsson @ernire]

@italivar @Fravikid Ég er einfaldlega að reyna að skilja hvort þú sért t.d. einhverskonar "Liberterian" sem villt ekki skatta eða hvort þú sért anarkisti sem vilt í raun leggja ríkið niður og treysta bara á kapitalismann, eða hvort þú sért anarcho-kommúnismi þar sem skattlagning er óþörf ?

[Ernir Erlingsson @ernire]

@italivar @Fravikid Auðvelt að gagnrýna en hvað viltu í staðinn? Ertu anarkist? Kommúnisti? Viltu ólígarka eða kannski föðurlegan einræðisherra?

[Ernir Erlingsson @ernire]

@steinunn_yr Þú misstir af voða litlu, nema þá frekari innihaldshnignun..

[Ernir Erlingsson @ernire]

@saevarhb Veistu hvað er búið að lofa að gera þetta lengi?

[Peter Kraft @petereliaskraft]

What happens if your CPU gets something wrong? If it wakes up one day and decides 2+2=5?

Well, most of us will never have to worry about that. But if you work at a company the size of Google, you do, which is why this paper on "mercurial cores" is so fascinating.

What the authors report--and supposedly this is common knowledge at the hyperscalers--is that a couple cores per several thousand machines are "mercurial." Due to subtle manufacturing defects or old age, they give wrong answers for certain instructions. These can cause all sorts of impossible-to-diagnose issues. Some rare problems at Google that were traced back to bad CPUs include:

- Mutexes not working, causing application crashes
- Silent data corruption
- Garbage collectors targeting live memory, causing application crashes
- Kernel state corruption causing kernel panics

What makes CPUs go bad? It's very hard to tell. The authors posit that issues are becoming more frequent as CPUs get more complex, but there aren't solid numbers behind that. There are certainly strong relationships between frequency, temperature, voltage, and bad CPU behavior--most mercurial CPUs only cause problems under very specific conditions, but those conditions vary from CPU to CPU. Age is another source of problems, as older CPUs are more likely to exhibit problems.

Bad CPUs are an especially serious problem because they're very hard to detect. If cosmic rays flip bits in storage or on the network, that can be detected through error coding. But there's no analogy for a CPU that allows cheap online verification of its correctness. Instead, the best detection techniques involve monitoring for symptoms. If a core exhibits exceptionally high rates of process crashes or kernel panics relative to its fellows, that's a strong indication something is wrong with it. For the most critical applications, the authors propose triple modular redundancy--redoing each of its computations on three cores and majority-voting a reliable result.

More than anything, this paper is a call to action--letting everyone know that CPUs can fail. So now, if you ever find a bug you can't diagnose, you can blame the CPU! 🙂

[Ernir Erlingsson @ernire]

@siggib007 Ömurlegt og ótrúlega sterkur hvati til að kaupa rafmagnsbíl

[Ernir Erlingsson @ernire]

@WilliamFristad @azubarrend @gilroy0 @jimbo_madison @OttoWerkr @SethBarronNYC @jordanzakarin @tiffanyhopeful @AOC Yep, civilizations rise and fall, and so does Sunday's off apparently. I wonder if there's a bronze age equivalent?

[Ernir Erlingsson @ernire]

@WilliamFristad @azubarrend @gilroy0 @jimbo_madison @OttoWerkr @SethBarronNYC @jordanzakarin @tiffanyhopeful @AOC "Karl der große", also known as "Charlemagne", the holy Roman emporer ~800 AD was responsible for Sundays off work. It was mostly to strengthen the church at the time.

[Ernir Erlingsson @ernire]

@BjornIvarBjorns @arnarar Þetta eru laun, þú sérð að mótframlag er yfir 10 milljónir sem stemmir við laun upp á 75 milljónir. Þetta eru þrír starfsmenn með rétt yfir 2 milljónir á mánuði (ef jafnt er)

[Ernir Erlingsson @ernire]

@sibinmohan Haha, this is great! Thanks for sharing