Infinity Fabric = PCIe

By: Groo (charlie.delete@this.semiaccurate.com), March 15, 2017 5:35 pm
Room: Moderated Discussions
slacker (s.delete@this.lack.er) on March 15, 2017 2:59 pm wrote:
> Groo (charlie.delete@this.semiaccurate.com) on March 13, 2017 7:33 am wrote:
> > slacker (s.delete@this.lack.er) on March 12, 2017 6:41 pm wrote:
> > >
> > > Does AMD have a modern, high-speed, interprocessor interconnect for Zen? It doesn't seem like it.
> >
> > http://semiaccurate.com/2017/01/19/amd-infinity-fabric-underpins-everything-will-make/
>
> Thank you for the link to your story. AMD seems to be giving you basically no information. Their language
> expresses an uneasiness at discussing the subject at the level of technical information.
>
> The emperor has no clothes; I suspect AMD is literally using PCIe as an interprocessor interconnect, with a
> cHT protocol layered on top. Intel has a patent for implementing the QPI protocol over PCIe, and I have a
> feeling that AMD has taken this route (perhaps with some proprietary extensions, or higher signaling rate).

Did you see the part about physical layer agnostic? I can think of at least three physical layers it runs over at the moment, and there are quite likely more. PCIe is almost tangential to IF from what I see.

As for the explanation they weren't hiding it, at the first talk it was all about GPUs in any level of detail, the CPU detail was saved for a later date. At the second brief, the Ryzen reveal, it wasn't aimed at the tech set. What little tech there was was somewhat a rehash of the Hot Chips arch talk and a little more about the device itself rather than just the core. This is the long way of saying the audience wasn't right for an IF talk and I didn't have time to sit down with the correct people. If they do a Naples brief, I plan to rectify this should there be any opportunity.

-Charlie
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TopicPosted ByDate
What is infinity fabric?slacker03/12/17 06:41 PM
  What is infinity fabric?Jason Creighton03/13/17 12:26 AM
    What is infinity fabric?Klimax03/13/17 12:42 AM
      What is infinity fabric?Kevin G03/13/17 04:39 AM
  What is infinity?Anon03/13/17 04:44 AM
  What is infinity fabric?Groo03/13/17 07:33 AM
    What is infinity fabric?Ireland03/13/17 09:12 AM
      Another way to put same questionIreland03/13/17 09:16 AM
      What is infinity fabric?Groo03/13/17 12:12 PM
        What is infinity fabric?Ireland03/13/17 02:07 PM
          What is infinity fabric?Ireland03/13/17 02:32 PM
            What is infinity fabric?Seni03/14/17 12:38 PM
          What is infinity fabric?Brendan03/14/17 05:28 AM
            What is infinity fabric?Ireland03/14/17 06:09 AM
            What is infinity fabric?Groo03/14/17 07:35 AM
              What is infinity fabric?Ireland03/14/17 08:35 AM
    Infinity Fabric = PCIeslacker03/15/17 02:59 PM
      Infinity Fabric = PCIeMichael S03/15/17 04:19 PM
        Infinity Fabric = PCIeIreland03/15/17 04:49 PM
        Infinity Fabric = PCIeRicardo B03/15/17 10:25 PM
        Infinity Fabric = PCIeslacker03/15/17 10:45 PM
          Infinity Fabric = PCIeRicardo B03/15/17 11:02 PM
            Infinity Fabric = PCIeAaron Spink03/16/17 01:08 AM
              Infinity Fabric = PCIeRicardo B03/16/17 05:30 AM
                Infinity Fabric = PCIeAaron Spink03/16/17 10:58 AM
        Infinity Fabric = PCIeGabriele Svelto03/16/17 03:48 AM
          Latency vs. bandwidthDavid Kanter03/16/17 08:04 AM
      Infinity Fabric = PCIeGroo03/15/17 05:35 PM
        Infinity Fabric = PCIeslacker03/15/17 11:11 PM
          Infinity Fabric = PCIeAdrian03/16/17 02:51 AM
            Infinity Fabric = PCIeMichael S03/16/17 04:32 AM
              Infinity Fabric = PCIeAdrian03/16/17 07:58 AM
                Infinity Fabric = PCIeRicardo B03/16/17 09:16 AM
                  Infinity Fabric = PCIeMichael S03/16/17 09:54 AM
                    Infinity Fabric = PCIeRicardo B03/16/17 10:07 AM
                      Infinity Fabric = PCIeMichael S03/16/17 02:33 PM
                        Infinity Fabric = PCIeGabriele Svelto03/17/17 03:35 AM
                          Infinity Fabric = PCIeAaron Spink03/17/17 10:25 AM
                            Thanks, your posts on this thread have been extremely informative (NT)Gabriele Svelto03/17/17 01:08 PM
                            Infinity Fabric = PCIeRicardo B03/17/17 06:08 PM
                              Infinity Fabric = PCIeAaron Spink03/17/17 06:27 PM
                              Quickpath papers - circuits and implementationslacker03/18/17 06:50 PM
                                Quickpath papers - circuits and implementationRicardo B03/19/17 08:07 AM
                    Infinity Fabric = PCIeAaron Spink03/16/17 11:11 AM
                      Infinity Fabric = PCIeMichael S03/16/17 02:46 PM
                        Infinity Fabric = PCIeRicardo B03/16/17 03:07 PM
                          Infinity Fabric = PCIeMichael S03/16/17 05:13 PM
                            Infinity Fabric = PCIeAaron Spink03/16/17 11:04 PM
                            Infinity Fabric = PCIeRicardo B03/16/17 11:30 PM
                              Infinity Fabric = PCIeMichael S03/17/17 07:24 AM
                                Infinity Fabric = PCIeRicardo B03/17/17 06:07 PM
              Infinity Fabric = PCIeDavid Kanter03/16/17 08:36 AM
                Infinity Fabric = PCIeMichael S03/16/17 08:50 AM
                  Infinity Fabric = PCIeAaron Spink03/16/17 11:24 AM
                    Infinity Fabric = PCIeMichael S03/16/17 02:45 PM
                      Infinity Fabric = PCIeAaron Spink03/16/17 11:21 PM
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