Poulson Microarchitecture Article

Article: Poulson: The Future of Itanium Servers
By: David Kanter (dkanter.delete@this.realworldtech.com), May 22, 2011 11:47 pm
Room: Moderated Discussions
As of late, I've been mostly writing smaller and more digestible articles. However, I still intend to continue our tradition of in-depth microarchitecture analysis. This week's article is a analysis of Poulson and Tukwila, that builds on the disclosures at ISSCC to present the most comprehensive picture of the future Itanium architecture.

Some might question the significance of Itanium in light of the reduced ecosystem support and Oracle's transparent attempt to sabotage a rival architecture. However, Poulson promises to be a very interesting design that moves from a simple static VLIW to a more conventional pipeline.

Poulson has a totally new core with dynamic scheduling, fine-grained multithreading and a shared L3 cache. The net result is a vastly more efficient microprocessor that should achieve 2.5-2.8X higher performance and power high-end servers for the next 10 years.

In this article, we go through the microarchitecture of Poulson including the core pipeline, system interfaces and physical implementation.

http://www.realworldtech.com/page.cfm?ArticleID=RWT051811113343


Enjoy, and as always, comments and discussion are encouraged.

David
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Poulson Microarchitecture ArticleDavid Kanter2011/05/22 11:47 PM
  Itanium achieved "incredibly high single threaded performance"?Mark Roulo2011/05/23 07:46 AM
    Itanium achieved "incredibly high single threaded performance"?Daniel Bizo2011/05/23 08:08 AM
      Itanium achieved "incredibly high single threaded performance"?David Kanter2011/05/23 08:44 AM
        Itanium achieved "incredibly high single threaded performance"?Michael S2011/05/23 01:20 PM
          Itanium achieved "incredibly high single threaded performance"?Michael S2011/05/23 03:30 PM
        not reallyRichard Cownie2011/05/23 03:37 PM
          you are just spouting anti-IPF propagandaDaniel Bizo2011/05/23 04:10 PM
            you are just spouting anti-IPF propagandaRichard Cownie2011/05/23 05:13 PM
              you are just spouting anti-IPF propagandaLlew2011/05/24 12:04 AM
                you are just spouting anti-IPF propagandaLinus Torvalds2011/05/24 07:58 AM
                  you are just spouting anti-IPF propagandaLlew2011/05/25 01:28 AM
                    you are just spouting anti-IPF propagandaBrett2011/05/25 07:33 AM
                      you are just spouting anti-IPF propagandasomeone2011/05/25 08:22 AM
                        you are just spouting anti-IPF propagandaRakesh Malik2011/05/25 09:25 AM
                          you are just spouting anti-IPF propagandaRichard Cownie2011/05/25 09:56 AM
                            you are just spouting anti-IPF propagandaRakesh Malik2011/05/25 10:06 AM
                              you are just spouting anti-IPF propagandaRichard Cownie2011/05/25 11:13 AM
                                you are just spouting anti-IPF propagandaRakesh Malik2011/05/25 11:22 AM
                                  you are just spouting anti-IPF propagandaMichael S2011/05/26 03:43 AM
                                    POWERx and ItaniumDavid Kanter2011/05/26 04:53 AM
                                    you are just spouting anti-IPF propagandasomeone2011/05/26 08:22 AM
                                      you are just spouting anti-IPF propagandaDavid Kanter2011/05/26 08:40 AM
                                        you are just spouting anti-IPF propagandasomeone2011/05/26 09:11 AM
                                          you are just spouting anti-IPF propagandaMichael S2011/05/26 10:43 AM
                                            Bandwidth in LLCDavid Kanter2011/05/26 03:47 PM
                                              Bandwidth in LLCIntelUser20002011/05/27 12:47 AM
                                              Bandwidth in LLCMichael S2011/05/27 01:45 AM
                                                Bandwidth in LLCDavid Kanter2011/05/27 10:03 AM
                                you are just spouting anti-IPF propagandajrl2011/05/25 06:58 PM
                                  you are just spouting anti-IPF propagandaMichael S2011/05/26 03:28 AM
                                    obsess much?someone2011/05/26 08:14 AM
                                      obsess much?Michael S2011/05/26 09:56 AM
                                        obsess much?someone2011/05/26 12:00 PM
                                    you are just spouting anti-IPF propagandajrl2011/05/27 07:46 PM
                                      you are just spouting anti-IPF propagandaanonymous2011/05/27 11:03 PM
                        you are just spouting anti-IPF propagandaBrett2011/05/25 11:56 AM
                          you are just spouting anti-IPF propagandaDavid Kanter2011/05/25 02:00 PM
                            you are just spouting anti-IPF propagandaRichard Cownie2011/05/25 03:23 PM
                              Large cachesDavid Kanter2011/05/25 06:22 PM
                                Large cachesRichard Cownie2011/05/25 07:18 PM
                                  Large cachesanon2011/05/26 05:03 PM
                                    Large cachesRichard Cownie2011/05/26 05:50 PM
                                      Large cachesanon2011/05/26 06:36 PM
                                        Large cachesRichard Cownie2011/05/26 07:46 PM
                                          Large cachesanon2011/05/26 11:43 PM
                                            Large cachesRichard Cownie2011/05/27 02:24 AM
                                              Large cachesDavid Kanter2011/05/27 10:20 AM
                                                Large cachesRichard Cownie2011/05/27 10:51 AM
                                                  Large cachesAaron Spink2011/05/27 11:18 AM
                                                    Large cachesRichard Cownie2011/05/27 11:43 AM
                                                      Large cachessomeone2011/05/27 01:00 PM
                                                        Large cachesRichard Cownie2011/05/27 04:59 PM
                                                          WorkstationsDavid Kanter2011/05/27 08:25 PM
                                                            WorkstationsRichard Cownie2011/05/28 05:21 AM
                                                              WorkstationsMichael S2011/05/29 03:25 AM
                                                          Large cachesAaron Spink2011/05/27 10:11 PM
                                                    Large cachesCarlie Coats2011/05/27 01:33 PM
                                                      Large cachesAaron Spink2011/05/27 02:28 PM
                                              Large cachesanon2011/05/27 05:39 PM
                                          Large cachesAaron Spink2011/05/27 11:11 AM
                                            Large cachesLinus Torvalds2011/05/27 01:38 PM
                                              Large cachesAaron Spink2011/05/27 02:33 PM
                                                Large cachesLinus Torvalds2011/05/27 04:26 PM
                                                  Miss distanceDavid Kanter2011/05/27 08:01 PM
                                                    Miss distanceLlew2011/05/27 11:27 PM
                                                      Miss distanceanon2011/05/28 12:00 AM
                                                      Miss distancerwessel2011/05/28 01:01 AM
                                                        Miss distanceLlew2011/05/28 02:14 AM
                                                    Miss distanceLinus Torvalds2011/05/28 07:55 AM
                                                      Miss distancea reader2011/05/28 03:50 PM
                                                        Miss distanceLinus Torvalds2011/05/28 04:08 PM
                                                          Miss distancea reader2011/05/29 07:32 AM
                                                    Miss distanceajensen2011/05/29 12:14 AM
                                                      Miss distanceLlew2011/05/29 02:01 AM
                                                      Miss distancebakaneko2011/05/29 04:20 AM
                                                  Run-ahead gives MLP for IOES. Rao2011/05/28 05:45 PM
                                                    Run-ahead gives MLP for IOELinus Torvalds2011/05/28 08:53 PM
                                                      Run-ahead gives MLP for IOES. Rao2011/05/28 09:31 PM
                                                        Run-ahead gives MLP for IOELlew2011/05/29 12:03 AM
                                                          Run-ahead gives MLP for IOEAaron Spink2011/05/29 03:03 AM
                                                            Run-ahead gives MLP for IOEa reader2011/05/29 07:27 AM
                                        Large cachesDavid Kanter2011/05/26 09:58 PM
                                          Large cachesanon2011/05/26 11:41 PM
                                            Large cachesRichard Cownie2011/05/27 05:46 AM
                                              Large cachesanon2011/05/27 10:07 PM
                                Large cachesBrett2011/05/26 09:28 AM
                                  Large cachesDan Downs2011/05/26 01:01 PM
                                    Large cachesDavid Kanter2011/05/26 03:52 PM
                                      Large cachesMichael S2011/05/27 02:01 AM
                                    Large cachesBrett2011/05/26 08:38 PM
                                      Large cachesDan Downs2011/05/27 10:59 AM
                                        Large cachesBrett2011/05/28 10:45 AM
                            you are just spouting anti-IPF propagandampx2011/05/26 12:57 PM
                        you are just spouting anti-IPF propagandaMichael S2011/05/26 04:01 AM
                          you are just spouting anti-IPF propagandaanon2011/05/26 05:21 PM
                      you are just spouting anti-IPF propagandaanon2011/05/25 09:13 AM
                  you are just spouting anti-IPF propagandaDavid Kanter2011/05/26 12:45 AM
                    you are just spouting anti-IPF propagandasomeone2011/05/26 08:55 AM
                      Poulson power and perfDavid Kanter2011/05/26 09:10 AM
                        Poulson power and perfsomeone2011/05/26 09:40 AM
                        Poulson power and perfanon2011/05/26 09:31 PM
                          Poulson power and perfDavid Kanter2011/05/26 10:12 PM
                            Poulson power and perfanon2011/05/28 08:24 AM
                              Poulson power and perfDavid Kanter2011/05/28 10:28 AM
              you are just spouting anti-IPF propagandaDaniel Bizo2011/05/24 12:30 AM
                you are just spouting anti-IPF propagandaRichard Cownie2011/05/24 02:28 AM
                you are just spouting anti-IPF propagandampx2011/05/25 12:03 PM
                  you are just spouting anti-IPF propagandaMichael S2011/05/26 03:06 AM
                    you are just spouting anti-IPF propagandampx2011/05/26 12:27 PM
            highest performing xx nm CPUsMichael S2011/05/24 08:55 AM
      Itanium achieved "incredibly high single threaded performance"?Max2011/05/23 10:07 AM
        Itanium achieved "incredibly high single threaded performance"?Daniel Bizo2011/05/23 01:59 PM
    Itanium achieved "incredibly high single threaded performance"?David Kanter2011/05/23 08:14 AM
      Itanium achieved "incredibly high single threaded performance"?Michael S2011/05/23 01:17 PM
        Itanium achieved "incredibly high single threaded performance"?David Kanter2011/05/23 05:56 PM
          Itanium achieved "incredibly high single threaded performance"?Thu Nguyen2011/05/23 09:09 PM
            Itanium achieved "incredibly high single threaded performance"?David Kanter2011/05/23 10:11 PM
              Itanium achieved "incredibly high single threaded performance"?Michael S2011/05/24 03:08 AM
                Itanium achieved "incredibly high single threaded performance"?David Kanter2011/05/24 08:36 AM
                  Itanium achieved "incredibly high single threaded performance"?Michael S2011/05/24 09:17 AM
                  Itanium achieved "incredibly high single threaded performance"?Thu Nguyen2011/05/24 01:45 PM
                    POWER7 vs. SNB SPECint_baseDavid Kanter2011/05/24 09:15 PM
                      SNB SPECint linkDavid Kanter2011/05/24 09:17 PM
                      Lies, damn lies & SPEC resultsPassing by2011/05/26 07:06 AM
                        Lies, damn lies & SPEC resultsDavid Kanter2011/05/26 08:17 AM
                          Lies, damn lies & SPEC resultsMichael S2011/05/26 10:57 AM
                          Lies, damn lies & SPEC resultsanon2011/05/26 05:44 PM
                        Lies, damn lies & SPEC resultsMichael S2011/05/26 11:04 AM
                          Lies, damn lies & SPEC resultsLinus Torvalds2011/05/26 11:53 AM
                            Lies, damn lies & SPEC resultsJouni Osmala2011/05/27 12:42 AM
                              mem usage distributionMichael S2011/05/27 01:38 AM
                                mem usage distributionJouni Osmala2011/05/27 04:25 AM
                              Lies, damn lies & SPEC resultsLinus Torvalds2011/05/27 06:44 AM
                                Lies, damn lies & SPEC resultsJouni Osmala2011/05/28 05:19 AM
                                  Lies, damn lies & SPEC resultsLinus Torvalds2011/05/28 08:29 AM
                                    Using larger translationsPaul A. Clayton2011/05/28 12:17 PM
                                      Using larger translationsLinus Torvalds2011/05/28 12:58 PM
                                        Using larger translationsanon2011/05/28 04:37 PM
                                        Large pages still seem attractivePaul A. Clayton2011/05/28 08:47 PM
                                          Large pages still seem attractiveLinus Torvalds2011/05/28 10:02 PM
                                    Lies, damn lies & SPEC resultsDoug Siebert2011/05/28 12:35 PM
                                      Lies, damn lies & SPEC resultsLinus Torvalds2011/05/28 01:14 PM
                                        Lies, damn lies & SPEC resultsLinus Torvalds2011/05/28 01:25 PM
                                        Lies, damn lies & SPEC resultsmpx2011/05/29 08:12 AM
                                          Lies, damn lies & SPEC resultsLinus Torvalds2011/05/30 06:04 AM
                                            Lies, damn lies & SPEC resultsgallier22011/05/30 07:23 AM
                                            Lies, damn lies & SPEC resultsmpx2011/05/30 01:49 PM
                                        Lies, damn lies & SPEC resultsDoug Siebert2011/05/29 11:30 AM
                                      Lies, damn lies & SPEC resultsanon2011/05/28 03:54 PM
                                        Lies, damn lies & SPEC resultsnone2011/05/28 04:58 PM
                                          How's that for compatibility?David Kanter2011/05/28 05:14 PM
                                            How's that for compatibility?none2011/05/28 05:38 PM
                                              How's that for compatibility?anon2011/05/28 08:00 PM
                                                How's that for compatibility?Jouni Osmala2011/05/28 11:32 PM
                                                  Larger caches with smaller pagesPaul A. Clayton2011/05/29 08:40 PM
                                                How's that for compatibility?Wilco2011/05/30 10:18 AM
                                                  How's that for compatibility?anon2011/05/30 10:20 PM
                                                    How's that for compatibility?Wilco2011/06/01 03:47 AM
                                                      How's that for compatibility?anon2011/06/01 05:12 AM
                                                        How's that for compatibility?Michael S2011/06/02 01:41 AM
                                                          How's that for compatibility?Wilco2011/06/02 03:01 AM
                                                            How's that for compatibility?none2011/06/02 09:03 AM
                                      Lies, damn lies & SPEC resultsanon2011/05/28 06:02 PM
                                        Lies, damn lies & SPEC resultsDavid Kanter2011/05/28 07:21 PM
                                        Lies, damn lies & SPEC resultsS. Rao2011/05/28 07:34 PM
                                          Lies, damn lies & SPEC resultsanon2011/05/28 11:47 PM
                                            Lies, damn lies & SPEC resultsS. Rao2011/05/29 01:09 AM
                                              Lies, damn lies & SPEC resultsMichael S2011/05/29 02:59 AM
                                                Lies, damn lies & SPEC resultsanon2011/05/29 03:45 AM
                                                  Lies, damn lies & SPEC resultsanon2011/05/29 04:18 AM
                                            Lies, damn lies & SPEC resultsJouni Osmala2011/05/29 01:49 AM
                                              Lies, damn lies & SPEC resultsanon2011/05/29 03:32 AM
                                                Lies, damn lies & SPEC resultsJouni Osmala2011/05/29 04:19 AM
                                                  Lies, damn lies & SPEC resultsMichael S2011/05/29 09:05 AM
                                                    Lies, damn lies & SPEC resultsJouni Osmala2011/05/29 09:40 AM
                                                      Lies, damn lies & SPEC resultsMichael S2011/05/29 10:25 AM
                                                  Lies, damn lies & SPEC resultsanon2011/05/29 11:50 AM
                                              Lies, damn lies & SPEC resultsmpx2011/05/30 03:22 AM
                                      Lies, damn lies & SPEC resultsGabriele Svelto2011/05/29 02:09 AM
                          Lies, damn lies & SPEC resultsanon2011/05/26 05:58 PM
                  Itanium achieved "incredibly high single threaded performance"?anon2011/05/24 10:25 PM
    Itanium achieved "incredibly high single threaded performance"?someone2011/05/24 06:40 AM
      Itanium achieved "incredibly high single threaded performance"?none2011/05/24 08:08 AM
        Itanium achieved "incredibly high single threaded performance"?someone2011/05/24 09:35 AM
      Itanium achieved "incredibly high single threaded performance"?Megol2011/05/24 08:10 AM
      Itanium achieved "incredibly high single threaded performance"?Seni2011/05/24 08:43 AM
        Itanium achieved "incredibly high single threaded performance"?someone2011/05/24 09:38 AM
      Itanium achieved "incredibly high single threaded performance"?Mark Roulo2011/05/24 02:41 PM
        P4 180 nm with L3anonymous2011/05/25 08:16 AM
      Itanium achieved "incredibly high single threaded performance"?TA152H2011/05/25 09:58 AM
  Thanks!Wouter Tinus2011/05/23 11:21 AM
  Poulson Microarchitecture Articleajensen2011/05/23 12:16 PM
    Poulson Microarchitecture ArticleDavid Kanter2011/05/23 05:48 PM
      Poulson control queueajensen2011/05/23 09:48 PM
        Poulson control queueDavid Kanter2011/05/26 12:22 AM
  Some nitpicks and comments/questionsPaul A. Clayton2011/05/23 12:22 PM
    Wide-Word [was: Some nitpicks and comments/questions]anon2011/05/23 08:33 PM
    Some nitpicks and comments/questionsDavid Kanter2011/05/24 09:36 AM
      Little technically keeps Xeon from true high-endPaul A. Clayton2011/05/24 03:56 PM
        Little technically keeps Xeon from true high-endDavid Hess2011/05/24 07:16 PM
          ChipKill implementation requirementsPaul A. Clayton2011/05/25 08:38 AM
            ChipKill implementation requirementsDavid Hess2011/05/25 05:10 PM
  spec int base referenceajensen2011/05/24 01:08 PM
    spec int base referenceMichael S2011/05/24 02:08 PM
    spec int base referenceMichael S2011/05/24 03:02 PM
      spec int base referenceajensen2011/05/24 10:38 PM
        spec int base referenceMichael S2011/05/25 01:44 AM
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