Zajímavý článek: Tom Forsyth - Why didn't Larrabee fail?

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Zajímavý článek: Tom Forsyth - Why didn't Larrabee fail?

Příspěvekod Jan Olšan » úte 16. srp 2016 13:06:49

Docela zajímavé čtení - rekapitulace toho jak dopadl projekt Larrabee/Xeon Phi z pohledu Intelu/insidera.
http://tomforsyth1000.github.io/blog.wi ... l%3F%5D%5D

So let's talk about the elephant in the room - graphics. Yes, at that we did fail. And we failed mainly for reasons of time and politics. And even then we didn't fail by nearly as much as people think. Because we were never allowed to ship it, people just saw a giant crater, but in fact Larrabee did run graphics, and it ran it surprisingly well. Larrabee emulated a fully DirectX11 and OpenGL4.x compliant graphics card - by which I mean it was a PCIe card, you plugged it into your machine, you plugged the monitor into the back, you installed the standard Windows driver, and... it was a graphics card. There was no other graphics cards in the system. It had the full DX11 feature set, and there were over 300 titles running perfectly - you download the game from Steam and they Just Work - they totally think it's a graphics card! But it's still actually running FreeBSD on that card, and under FreeBSD it's just running an x86 program called DirectXGfx (248 threads of it). And it shares a file system with the host and you can telnet into it and give it other work to do and steal cores from your own graphics system - it was mind-bending! And because it was software, it could evolve - Larrabee was the first fully DirectX11-compatible card Intel had, because unlike Gen we didn't have to make a new chip when Microsoft released a new spec. It was also the fastest graphics card Intel had - possibly still is. Of course that's a totally unfair comparison because Gen (the integrated Intel gfx processor) has far less power and area budget. But that should still tell you that Larrabee ran graphics at perfectly respectable speeds. I got very good at ~Dirt3 on Larrabee.
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Jan Olšan
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