Search results

Entropy is a physical property. The 'lie' (really a misconception) is to associate entropy with disorder https://aapt.scitation.org/doi/10.1119/1.5126822

Both matter and matter+radiation verify the second law.

From the links: A couple of nonsensical statements from people who don't know a bit (PUN intended) about thermodynamics. This new 'violation' of the second law will end up in the trash like the thousands of previous reports of violation of this venerable law.

The engine using more cores does not always translate into higher performance. If the main thread is bottlenecked, the rest of the cores will be underutilized.

The reason why engineers are moving to heterogeneous designs is because a single kind of core is not optimal for all the workloads and situations. No single core design can be optimal because the microarchitecture requirements for each situation are antagonistic: high frequency vs low, deep...

Because TDP for Ampere is the peak power and for AMD it is the average power. So the Ampere chip is a ~200W chip if you want to compare it with AMD EPYC.

It will down costs, but x86-64 cannot really compete in the long run: Where Ampere and the Altra definitely is beating AMD in is TCO, or total cost of ownership. Taking the flagship models as comparison points – the Q80-33 costs only $4050 which generally matching the performance of AMD’s EPYC...

https://fuse.wikichip.org/news/4795/arm-launches-new-neoverse-n2-and-v1-server-cpus-1-4x-1-5x-ipc-sve-and-armv9/ New cores with better microarchitectures, new instructions (including SVE), and adapted to new process nodes. The N2 is an evolution of the N1 used by Amazon and others. The V1 is a...

This is a rewrite of the history. Check the talks, the roadmaps, and the official plans when Rory Read was CEO. Not only the x86 core was unnamed then, but the ARM core was officially called K12, because it was the successor to K5, K6, K7, K8, K9, and K10.

You are entirely right. The x86 tax has a fixed part and a variable part. The larger and more complex the design, the less weights the fixed portion of the tax and the ARM-x86 efficiency gap is reduced, but the gap is still significant at the ~ 200W level.

We have no x86 legacy, like 32-bit support and things like that,” said Hegde. “We are able to optimize our code, and our core area is significantly smaller [as a result]. Just to give you an idea, in the previous generation, if you look at ThunderX2, compared to AMD or Skylake, for the same...

Microsoft and Sony both wanted ARM for their consoles, but used x86 because ARM was only 32bit then. Carmack also publicly liked the idea of ARM-based consoles. I believe developers are open to the nice idea of using a single modern architecture (ARM) for the entire gaming ecosystem. x86 has...

ARM isn't low power. ARM is more efficient. So you can use that superior efficiency for providing (i) the same performance within smaller power envelope, or (ii) higher performance for the same power envelope, or (iii) a combination of both. There are 250W ARM SKUs, and there is no...

The full thing is rendered in the post by Red Falcon. There are no slots, because slots are slow. It is based in a future microarchitecture to be announced by ARM. But Nvidia has already announced over 300 points on SPECrate2017_int_base. The Swiss National Supercomputing Center and the Los...

Extra details and the historical perspective behind Nvidia ARM/HPC aspirations https://www.nextplatform.com/2021/04/12/nvidia-enters-the-arms-race-with-homegrown-grace-cpus/

LG family here. Three models on use and one of them has (according to its user) a camera better than high-priced models from the competence.

ARM is only for phones and cannot scale up. ARM is nowhere to be used in supercomputers. Amazon Graviton is going nowhere. Apple will switch Intel by AMD because ARM is slow.

https://www.qualcomm.com/news/releases/2021/03/16/qualcomm-completes-acquisition-nuvia Is the Apple M1 competitor coming? Also the announcement does not mention servers, which was Nuvia original target.

Determinism implies an unitary evolution and unitary evolutions can be inverted because there is an one to one relation between states. That is the reason why all unitary evolution theories are time-reversible and cannot explain the observed arrow of time.

The arrow of time doesn't imply determinism. In fact many models of irreversibility are based in non-unitary evolutions.

I tried to explain why determinism cannot be scientifically proved. For reasons (i--v) all our models are stochastic with a deterministic component plus another is not. Precisely the random component is the reason why we use statistical methods to extract averages and uncertainties from the raw...

Rigth. We will never have the evidence needed to prove determinism. Anyone wanting to prove determinism must (i) create a final theory that explains everything, (ii) exactly and instantaneously measure all the properties of the Universe with infinite precision, (iii) introduce all that...

It isn't. "Cause and effect" doesn't imply determinism. An evolution can be both causal and non-deterministic. Neither chemistry nor biology embraced determinism and only a part of physics did (mechanics). Determinism is a non-scientific concept.

ROFL I never heard of half of those.

The problem with the many-world 'interpretation' is not that it postulates an infinite number of other worlds or unphysical split mechanism. The real problem is that the many-world 'interpretation' cannot describe the observations in this universe. 1) Entropy is not always increasing. 2) The...

1) The many world interpretation is not an interpretation, but a collection of conceptual nonsense combined with sloppy math pushed by 'four' people that doesn't understand quantum mechanics. 2) There is no consistent combination of quantum mechanics and relativity. In fact both theories are...

You confound the natural flow of time with time travel. The natural flow of time has been known since before physics was born and even a related concept of "arrow of time" was introduced thanks to the development of thermodynamics. Time travel is a concept introduced after special relativity was...

Going back violates all known conservation and causality principles, but as you say the entire paper is nonsense. I have always found delightful those sci-fi movies (without science content) where time travelers are warned not to 'interact' with the past (e.g. stepping on a butterfly) because...

Nonsense. Time travel is not possible.

Better efficiency equals to less power consumption for the same performance OR more performance for the same power consumption OR a combination of both: e.g., 20% more performance and 10% less consumption at the same time.

He is simply dismissing what Apple engineers have achieved. For a SSOOO microarchitecture, the IPC is given approximately by IPC ~= (a / L) sqrt(W) here a is a parameter that depends on the workload. L is the average instruction latency and W is the ROB size. The average instruction latency is...

No one here is debating if he is smart or no, simply mentioning that the "Work experience" table in the AT article is misleading and that the mentioned designs were leaded by someone else. What really impresses me is Keller's ability to work with different architectures and microarchitectures...

A pair of examples of media getting the facts right: Fred Weber was the lead architect of the K8 https://www.hpcwire.com/off-the-wire/amd-semiconductor-pioneer-fred-weber-joins-tachyum-corporate-advisor/ https://pcper.com/2005/03/interview-with-amds-fred-weber/

AMD did not mention Keller's name during the official presentation of the K7 in the microprocessor forum. The official presentation credits both Dirk Meyer and Fred Weber, with Meyer introduced to the public as the chief architect of the K7, but it seems like you know more than AMD, so there is...

"Rockstar" is the correct title here, because his contributions to computer science/technology are tiny. It is all smoke and propaganda compared to the true people that has really advanced the field. Again Anandtech gives an incorrect curriculum for Keller, stealing the contributions made by...

A lot of modern physics research is about getting grants and making a career. That is why many research physics focuses on ridiculous stuff such as manyworlds, extra universes, pre Big Bang, extra tiny dimensions, dark matter,... This way you can be making research for decades, without worrying...

ARM is fastest in many stuff. The fastest supercomputer in the world is ARM. Altra Q80-33 is the fastest server for several server and HPC workloads. Apple M1 is the fastest mobile chip in its kind...

Microsoft has been using ARM servers internally for a while. Azure runs on TX2 chips.

You mentioned only the number of cores and I added the number of threads. Anandtech tested a 64C/128T chip vs a 80C/80T chip.

128 threads vs 128 threads.