Serialization delay

Article: The Common System Interface: Intel's Future Interconnect
By: Michael S (already5chosen.delete@this.yahoo.com), September 28, 2007 4:32 am
Room: Moderated Discussions
Jonathan Kang (johnbk@gmail.com) on 9/26/07 wrote:
---------------------------
>
>From what I've read of the various Rambus patents that seem to relate to this (7271623
>and 7269706 are interesting in particular), it seems that they've been able to
>cut power consumption by improving upon just about every component in a transmission
>link in an iterative fashion. For instance, they've made a very sensitive receiver
>that does selective amplification based on a reference clock to cut on transmission pre-emphasis power, etc.
>

I got the same impression. Not a one big invention but attention to details on all levels and designing in complex.
For example, data available from CDR block helps to build simpler and more precise equalizer. Then better equalizer on the Rx side enables Tx side without pre-emphasis.

The fox knows many things, but the hedgehog knows one big thing. Rambus is a fox.

>This does not, however, get around the fundamental issue of the link having to
>be active at all times. Remember that whatever power figures given for parallel
>links such as CSI are only the active power figures. When comparing it to a serialized
>link, even a low-powered one like the one Rambus has, one has to take into account average power.

I think that at least for current server environment they reached "good-enough" point.
For dual socket system you want approximately 500 Gbit/s of interconnect bandwidth.
500 Gbit/s * 2 mW*s/Gbit = 1W.
Taking into account that idle power consumption of today's most economical dual-socket server exceeds 150W it seems that we can live with 1W constantly consumed by interconnects.

Quad-socket server would need 5-6 times more of interconnect bandwidth but even 6 Watt doesn't sound frightening for such relatively big box.
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New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/08/28 01:16 AM
  New article - The Common System Interface: Intel's Future InterconnectVincent Diepeveen2007/08/28 05:02 AM
  New article - The Common System Interface: Intel's Future InterconnectRichard Cownie2007/08/28 10:28 AM
    New article - The Common System Interface: Intel's Future InterconnectVincent Diepeveen2007/08/31 11:44 AM
      New article - The Common System Interface: Intel's Future InterconnectRichard Cownie2007/08/31 08:53 PM
        New article - The Common System Interface: Intel's Future InterconnectVincent Diepeveen2007/09/01 02:21 AM
          Adding layers can simplify designPaul A. Clayton2007/09/01 07:39 AM
          New article - The Common System Interface: Intel's Future InterconnectMichael S2007/09/02 02:25 AM
        New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/14 12:47 PM
    New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/09/14 08:47 PM
  New article - The Common System Interface: Intel's Future InterconnectPaul2007/08/28 11:04 AM
    New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/08/28 12:43 PM
      New article - The Common System Interface: Intel's Future InterconnectJoe Chang2007/08/28 06:17 PM
        New article - The Common System Interface: Intel's Future InterconnectJoe Chang2007/08/29 04:27 PM
  Thanks for the workWouter Tinus2007/08/28 12:33 PM
    Thanks for the workmac2007/08/29 12:44 PM
  New article - The Common System Interface: Intel's Future InterconnectHerbert Hum2007/08/28 01:22 PM
    ThanksDavid Kanter2007/08/28 04:13 PM
  Many thanks, very, very interesting! (NT)Cameron Jack2007/08/29 01:51 AM
  very nice article + memory ctrl integrationMarcin Niewiadomski2007/08/29 11:46 AM
    very nice article + memory ctrl integrationDavid Kanter2007/09/14 08:50 PM
      very nice article + memory ctrl integrationMarcin Niewiadomski2007/09/16 08:48 PM
  Coherency: Forwarding and OwnedPeter Gerdes2007/08/29 02:11 PM
    Coherency: Forwarding and OwnedDavid Kanter2007/08/29 06:29 PM
      Coherency: Forwarding and Ownednick2007/08/29 07:03 PM
        Coherency: Forwarding and OwnedDavid Kanter2007/08/29 11:08 PM
      Coherency: Forwarding and OwnedMichael S2007/08/30 01:17 AM
        Coherency: Forwarding and OwnedDavid Kanter2007/08/30 07:31 AM
      Coherency: Forwarding and OwnedPeter Gerdes2007/08/30 11:46 AM
        Coherency: Forwarding and OwnedDavid Kanter2007/08/30 01:46 PM
          Coherency: Forwarding and OwnedPeter Gerdes2007/08/30 07:03 PM
            Coherency: Forwarding and OwnedDavid Kanter2007/09/14 08:44 PM
              Node Interleaveunknown2007/09/15 03:14 AM
                Node InterleaveDavid Kanter2007/09/15 07:50 AM
                  Node InterleaveHoward Chu2007/09/16 12:14 PM
              Coherency: Forwarding and OwnedPeter Gerdes2007/09/16 12:50 PM
                Coherency: Forwarding and OwnedDavid Kanter2007/09/16 04:34 PM
                  Coherency: Forwarding and OwnedEduardoS2007/09/16 04:52 PM
                  Coherency: Forwarding and OwnedJonathan Kang2007/09/17 05:16 AM
                  Coherency: Forwarding and OwnedMatthias2007/09/17 06:59 AM
                    Coherency: Forwarding and Owned - additionMatthias2007/09/17 07:01 AM
                Coherency: Forwarding and Ownedanonymous2007/09/17 09:15 AM
                  Coherency: Forwarding and OwnedPeter Gerdes2007/09/17 12:44 PM
  New article - The Common System Interface: Intel's Future InterconnectMr. Camel2007/08/30 03:16 PM
    New article - The Common System Interface: Intel's Future InterconnectMichael S2007/08/31 01:11 AM
      New article - The Common System Interface: Intel's Future InterconnectMr. Camel2007/08/31 03:13 AM
        New article - The Common System Interface: Intel's Future InterconnectMichael S2007/08/31 03:24 AM
        New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/08/31 05:39 AM
          New article - The Common System Interface: Intel's Future InterconnectMichael S2007/08/31 06:53 AM
      New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/08/31 05:41 AM
        New article - The Common System Interface: Intel's Future InterconnectMichael S2007/08/31 06:36 AM
          New article - The Common System Interface: Intel's Future InterconnectMr. Camel2007/08/31 08:36 AM
  Thanks and excellent work!Jack A.2007/08/30 07:41 PM
  Lamport's TLAKonrad Schwarz2007/09/02 01:57 AM
    Lamport's TLADavid Kanter2007/09/02 07:55 PM
    Lamport's TLABrannon2007/09/03 07:12 AM
      Lamport's TLAKonrad Schwarz2007/09/18 10:21 AM
        Lamport's TLABrannon2007/09/18 01:58 PM
  New article - The Common System Interface: Intel's Future InterconnectJosé Javier Zarate2007/09/09 04:01 PM
  New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/16 05:42 PM
    Remote prefetchDavid Kanter2007/09/17 07:51 AM
  New article - The Common System Interface: Intel's Future InterconnectJigal2007/09/22 02:39 PM
    New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/09/22 04:35 PM
      New article - The Common System Interface: Intel's Future Interconnect8B/10B Latency2007/09/22 06:16 PM
        New article - The Common System Interface: Intel's Future Interconnectanon2007/09/22 08:05 PM
          New article - The Common System Interface: Intel's Future InterconnectDavid W. Hess2007/09/22 08:50 PM
            Clocking in CSIDavid Kanter2007/09/23 08:46 AM
              Hypertransport 3 AC CouplingDavid W. Hess2007/09/23 09:32 AM
                Hypertransport 3 AC Couplinganon2007/09/23 09:53 AM
                  Clocking lanesDavid Kanter2007/09/23 10:51 AM
        New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/09/22 08:34 PM
          New article - The Common System Interface: Intel's Future InterconnectDavid W. Hess2007/09/22 09:10 PM
            New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/25 07:15 AM
          New article - The Common System Interface: Intel's Future InterconnectMichael S2007/09/23 01:06 AM
            New article - The Common System Interface: Intel's Future InterconnectDavid W. Hess2007/09/23 03:41 AM
            Serialization delayDavid Kanter2007/09/23 08:57 AM
              Serialization delayMichael S2007/09/23 11:20 AM
                Serialization delayDavid Kanter2007/09/23 12:43 PM
                  Serialization delayMichael S2007/09/24 12:40 AM
                    Serialization delayMichael S2007/09/24 04:28 AM
                    Serialization delayAaron Spink2007/09/24 12:19 PM
                      Serialization delayMichael S2007/09/25 03:38 AM
                        Serialization delayJonathan Kang2007/09/25 08:10 AM
                          Serialization delayDavid W. Hess2007/09/26 12:22 AM
                        Serialization delayAaron Spink2007/09/25 12:13 PM
                          Thank you (NT)Michael S2007/09/25 12:53 PM
                Serialization delayJonathan Kang2007/09/25 07:26 AM
                  Serialization delayMichael S2007/09/25 01:57 PM
                    Serialization delayJonathan Kang2007/09/26 05:24 AM
                      Serialization delayDavid W. Hess2007/09/26 06:39 AM
                        Serialization delayJonathan Kang2007/09/26 09:56 AM
                          Serialization delayDavid W. Hess2007/09/27 02:21 AM
                            Serialization delayJonathan Kang2007/09/27 04:36 AM
                              Serialization delayDavid W. Hess2007/09/27 05:31 PM
                      Serialization delayrwessel2007/09/26 01:26 PM
                        Serialization delayJonathan Kang2007/09/27 07:16 AM
                          Serialization delayrwessel2007/09/27 12:20 PM
                            Serialization delayJonathan Kang2007/09/28 04:38 AM
                              Serialization delayrwessel2007/09/28 01:00 PM
                                Serialization delayJonathan Kang2007/10/01 07:07 AM
                                  Cache coherent latencyDavid Kanter2007/10/01 07:20 AM
                                    Cache coherent latencyblaine2007/10/01 10:36 AM
                                      Critical word first on coherent interconnectsDavid Kanter2007/10/01 11:10 AM
                                        Does ccHT do critical word first?blaine2007/10/02 07:10 AM
                                    Cache coherent latencyJonathan Kang2007/10/01 12:34 PM
                                      Cache coherent latencyDavid Kanter2007/10/01 01:13 PM
                      Serialization delayMichael S2007/09/28 04:32 AM
                        Serialization delayanonymous2007/09/28 10:25 AM
                          Serialization delayMichael S2007/09/29 09:06 AM
        New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/25 07:05 AM
      New article - The Common System Interface: Intel's Future Interconnectjigal2007/09/23 12:37 PM
        CSI, PCI and HTDavid Kanter2007/09/23 12:46 PM
        New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/25 07:39 AM
          New article - The Common System Interface: Intel's Future Interconnectjigal2007/09/25 02:16 PM
            New article - The Common System Interface: Intel's Future InterconnectMichael S2007/09/26 03:14 AM
              New article - The Common System Interface: Intel's Future InterconnectAnonymous2007/09/26 09:41 AM
                New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/26 09:59 AM
            New article - The Common System Interface: Intel's Future InterconnectJonathan Kang2007/09/26 05:48 AM
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