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OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

anandtech.com

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Re: OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

#51

Post by asimuvPR »

valarauca1 wrote: post #45

I really enjoy the way AMD and Nvidia fight. Nvidia makes GSync. So the GPU can control and adjust display refresh rate on the fly. Proprietary, closed source, requires private Nvidia License. AMD makes FreeSync. FreeSync open sourced, added to the HDMI, and Display Port standards. Now we see Nvidia makes NvLink. Proprietary, very fast, requires private Nvidia license. AMD partners with IBM, Google, etc., etc. to mak…

Linus gives the best answer: https://youtu.be/IVpOyKCNZYw

tl;dr: Nvidia, fuck you.

Re: OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

#52

Post by arcanus »

valarauca1 wrote: post #45

I really enjoy the way AMD and Nvidia fight. Nvidia makes GSync. So the GPU can control and adjust display refresh rate on the fly. Proprietary, closed source, requires private Nvidia License. AMD makes FreeSync. FreeSync open sourced, added to the HDMI, and Display Port standards. Now we see Nvidia makes NvLink. Proprietary, very fast, requires private Nvidia license. AMD partners with IBM, Google, etc., etc. to mak…

> I really enjoy the way AMD and Nvidia fight

That's why I was so sad AMD was having trouble later year and hope they pull through. Competition is valuable and benefits the consumer!

Re: OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

#53

Post by joblessjunkie »

PhantomGremlin wrote: post #12

Was "anyone" as "annoyed" as I was about the "scare quotes" littered "throughout" the article? It was "hard" to read the "story". I've been guilty of using too many quotes in the recent past. Someone on HN called me on it, and I've since toned it down. Now it's something that sticks out at me.

It makes it seem like the "journalist" doesn't believe his own "reporting".

Re: OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

#57

Post by [deleted] »

mablap wrote: post #47
bch wrote: post #18

It felt so buried in the article, it's worth pointing out: OpenCAPI == "Open Coherent Accelerator Processor Interface"

This is what I was looking for before deciding to read the article or not. Didn't find it, came back here, and now I just won't bother. Unfortunate.

[deleted]

Re: OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

#58

Post by convolvatron »

gpderetta wrote: post #46
convolvatron wrote: post #30

Earlier quoted context omitted.

well, i think its a bit more about market segments and interoperability than anything else. currently overall systems from ibm, and, and intel are fundamentally incompatible. the PCI-E bus that knights landing hangs off of is a qualitatively different thing than the kinds of memory-coherent inter-cpu busses that are being addressed with the CAPI proposal. Intel has their own proprietary QPI. AMD has a quasi-open hype…

There are KNL variants that sit on a cpu socket and talk to the rest of the system via QPI.

I haven't caught up with the latest phi releases, but I'm really interested to do so. I haven't been able to find any discussion about a coherent QPI on KNL, but have found reference to OmniPath, which looks like a non-coherent large scale memory network. Is that what you were thinking of, or maybe could you post a reference?

Re: OpenCAPI Unveiled: AMD, IBM, Google, Xilinx, Micron and Mellanox Join Forces

#59

Post by gpderetta »

convolvatron wrote: post #58
gpderetta wrote: post #46

Earlier quoted context omitted.

There are KNL variants that sit on a cpu socket and talk to the rest of the system via QPI.

I haven't caught up with the latest phi releases, but I'm really interested to do so. I haven't been able to find any discussion about a coherent QPI on KNL, but have found reference to OmniPath, which looks like a non-coherent large scale memory network. Is that what you were thinking of, or maybe could you post a reference?

You are right, I was misremembering. The socketed KNL does not have QPI at all, so no multisocket boards are possible. Still the socketed KNL doesn't hang-off the PCI bus as it is its own host processor and has a dedicated link with memory.

Omnipath is used to drive both the Ethernet and PCIe.

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