> Let's simplify the problem and implicitly transpose the matrix multiplication. Both A and B (our inputs) will have K (our reduction dimension) as the leading dimension. This doesn't really matter much in practice, but it simplifies our code a lot.

The code is

  C[n * 16 + m] += A[k * 16 + m] * B[k * 16 + n];

However, if any part of an app uses affinitized threads, the whole app needs to be using the same thread pool, as otherwise perf will go down. In this regard, OpenMP is less composable.

(After reading the TFA: that's what Agner says right there in the 4th paragraph.)

(After re-reading the comment: I guess that the OS changes would need to be extensive with little to no benefit: running AVX2 on all cores will likely be faster than running 2 P cores with AVX512. The only thing that is really affected is the code that could use AVX512_FP16, but I doubt there's a lot of it outside of Intel.)

It's not an 'if'. The US did a lot of stuff on par with what Putin is doing now in Ukraine. The people and government of the US never were held responsible. Yes, they went through the motions of getting the UN approval, etc., but that does not make the actions morally justifiable. And this is what Russian propaganda uses to justify its actions.

I don't like pinning Putins actions on ordinary citizens. Putin is a dictator. In 2012 there was a big rally against him, and it was suppressed pretty violently, and since then there were no attempts on the same scale. Look at how Belorussians tried to topple Lukashenko. They made a much stronger attempt, but sill it did not work out. Are they morally responsible for the Belarus participation in this war? Are the people like me who moved out are responsible? When does that moral responsibility start? 2000s or 2010s?

Sure, there is a large chunk of population that supports Putin. They maybe are morally responsible for supporting the war. But I don't think they will actually be swayed by economic sanctions. Their culture won't change. They will be happy to severe ties with 'rotten West' -- they will feel like they are soldiers of the economic war. What will happen, I am afraid, is Russia turning into a second North Korea (or Venezuela).

> If the other empires of Europe changed (Germany, Spain, Britain, France, etc) - their people changed those empire, conquest obsessed cultures - then Russia too can and must change. Russia is the last major power in Europe still clinging to those decrepit, backwards ways. Russia must give up the notion of empire culturally and that means its people must fully abandon all the related ideas that propel and sustain that ideology (which endlessly spawns monsters like Putin (who is just another Russian Tsar type)). Until the people of Russia change their beliefs, the authoritarianism will just keep repeating.

In my rather uneducated opinion, the culture did not go away. The US is an empire. It is built differently, but it effectively is. China is or is becoming one. European culture is dominating the world in many subtile and not so subtile ways. Russia wants to be an empire, but it fails to recognize that empires are being built differently now, and tries to build a 19-th/20-th century one.

Disclaimer: I am from Russia, and live in the US. Have extended family in Russia. Unfortunately, some of them are brainwashed by the propaganda. Some are unable to leave as their whole life is to work in government-funded research (thankfully not military in any way). Fuck Putin and fuck the war. My best wishes to Ukrain and its people -- you will will regardless of how this war turns out.

PS. Apologies for the long rant...

Out of curiosity, I started googling, and this seems like a good place to read about ncd and more: http://www.softpanorama.org/OFM/norton_change_directory_clon....