Valentin Puente Varona
741 posts
Valentin Puente Varona
@xpuente
Computer architect trying to understand a bit of life's wetware.
Katılım Nisan 2008
307 Takip Edilen91 Takipçiler
let's break this down casually: Airbus had to downgrade A320 software back to L103+ because the newer L104 version is vulnerable to intense solar radiation flipping bits in the flight computers... think potential uncontrolled movements, as seen in that JetBlue event. The older version avoids that risk without needing hardware swaps for 85% of planes, though it loses some anti-stall bells and whistles.
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@JaimeObregon ok. Parece el FW Perimetral de Palo Alto los tiene catalogados como "Phising" y por eso lo está filtrando el firewall de Unican.
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@JaimeObregon Otros equipos de unican tampoco pueden acceder. Huele a regla de filtrado con expresión regular a lo bruto... por el nombre del dominio. Who knows.
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@itsalexvacca The advantage of AWS was cheap x86 servers + nascent virtualization technology for such virtualization adverse ISA (xen). Sun hardware was orders of magnitude more expensive. Your reasoning seems broken to me.
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Before AWS existed, one company ran the servers for Twitter, LinkedIn, and Facebook's entire app ecosystem.
They owned Node.js, invented containers 8 years before Docker, and Peter Thiel even backed them.
Then something happened...
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@Abel_TorresM Societal dynamics are among the most complex challenges we face. The primary function of the granular prefrontal cortex (PFC)—a feature that sets primates apart from other species—is thought to be specialized for navigating them.
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Airbus A320’s primary fly-by-wire computers still use Motorola 68k CPUs.
Fresh off the assembly line in 2025; it’s the same hardware as the original Macintosh.
The *lack* of speculative execution, with a simple in-order core makes it than modern chips! Here's why.
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Valentin Puente Varona retweetledi
Retweet if you want llama.cpp added here 👇
Visual Studio Code@code
In preview, Copilot Pro and Copilot Free users can now bring your own key (BYOK) for popular providers such as Anthropic, Gemini, Ollama, and Open Router. This allows you to use new models that aren’t supported natively by Copilot the very first day that they’re released.
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El rato de ayer en la tele. No me gusta este tipo de programas, pero he tratado de utilizar el altavoz para visibilizar lo que está pasando. 👇
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@RyanSmithAT Coherent protocol changes required to use an unsorted network (mesh) are no joke.
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We've finished some additional Ryzen 9 9950X core latency testing. We're waiting to hear back from AMD at this point. But we've not been able to find a case where cross-CCD latencies match the 7950X. Even Linux in high-performance mode shows similarly high latencies
Ryan Smith@RyanSmithAT
I'm working on a bit of a mystery this morning, following the launch of the Ryzen 9 9950X. The core-to-core latencies are nearly 2.5x (100ns) higher than they were on 7950X. These are very high latencies for on-chip comms. And it's not obvious why it's any higher than 7950X.
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Valentin Puente Varona retweetledi
In 1974, author Ray Bradbury was asked, “What is space travel going to do for man?” In response, he gave the most mystical, mind-blowing, and strangely moving answer one could have imagined.
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Fourier, Oppenheim, Laplace, Dirac, Dirichlet, Moyano, QPSK, Schottky, SPICE, Riemann, CMOS, Cramer, LISP, Varignon, Cauchy, VHDL…
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@dav_robbe @KordingLab At least "one" read the abstract! 🤣
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When we wrote that paper on neuroscientists understanding microprocessors we inspired a computer architecture person to actually develop a model of the brain: shorturl.at/fKPZx thoughts? I will be happy to report any feedback back to him.
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@KordingLab LOL. That didn't get too much attention. Thanks anyway @KordingLab
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@InformatUnican ¿Que tiene que decir la CRUE acerca de las Universidades Saudis? A. Saudi lidera una coalición que es responsable del 60% de las muertes civiles en la guerra de Yemen? (con ~400.000 muertes en total)
shorturl.at/ghnor
El sino de los tiempos: relativismo moral y propaganda
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La Conferencia de Rectores de las Universidades Españoles (CRUE) condena la situación actual de la Franja de Gaza. Agradecemos a la CRUE su posicionamiento en esta delicada situación, y esperamos que no se quede sólo en buenas palabras.
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Note that GB5 had this issue too, when suddenly AVX512 was causing major acceleration in a subtest.
SPEC2006 was put on the lower priority because people were gaming the libquantum test (though in that test, compiler choice was variable).
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This is the problem with fixed tests. Eventually someone somewhere finds a way to game the system, causing one benchmark to shoot up and distort the final score. Sure it's architectural and genuine performance, but if no-one uses it yet, does it make a sound?
sawtooth@negativeonehero
I did something wrong, so here is the updated table. There's about 3% IPC increase.
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The Turing Award should be renamed the Von Neumann Award.
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@BerenMillidge @drclbuckley @anilkseth How does predictive coding theory account for the fact that most feedback target synapses are metabotropic (i.e., much weaker than ionotropic)?
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Interested in predictive coding? @drclbuckley, @anilkseth and I have put together a comprehensive new review covering both the core theory in an accessible way as well as many recent advances in the field.
Check it out at: arxiv.org/abs/2107.12979
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@xpuente @DrYohanJohn My guess is that core differences between cortical areas are driven more by evolution than by data. Some differences emerge early in the developmental process, even before birth.
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Pasko Rakic, never one to mince words, versus the idea that cortical columns are the same across the cortical mantle:
doi.org/10.1073/pnas.0…
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