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Intel’s Tukwila Confirmed to be Quad Core

Discussão em 'Novidades Hardware PC' iniciada por Zarolho, 3 de Junho de 2006. (Respostas: 8; Visualizações: 1078)

  1. Zarolho

    Zarolho Power Member

    Paul DeMone, an eminently respected industry observer at Real World Technologies has dug up some information on Tukwila, the next generation microprocessor in the Itanium family.

    Intel Caches Out with a Memory Controller

    According to several slides at an HPC conference in Asia, Tukwila will be a quad core part, confirming earlier rumors reported by Ashlee Vance of the Register and Charlie Demerjian of the Inquirer. Tukwila features an on-die FB-DIMM memory controller, which will lower access latency. The FB-DIMM controller likely supports 4 channels of memory, possibly more. As a result of the lower memory latency, Tukwila requires less cache than its predecessor. Montecito featured 27MB of cache, for two processors, while Tukwila is reported to have 6MB of L3 cache per core, or 24MB for each MPU. Preliminary diagrams also indicate that there is on-die switch for traffic between the four cores and caches on each chip.

    A Digital Legacy

    Tukwila will also feature the debut of the Common Systems Interconnect or CSI. CSI is a low latency, point to point, serial interconnect that uses differential signaling. Tukwila will integrate four full width CSI links and two half width links. Full width links operate at 6.4GT/s or 4.8GT/s in each direction, depending on the SKU. In comparison, current Itanium 2 systems have a 667MT/s bus, that is 128 bits wide for a total of 10.6GB/s of bandwidth. Unfortunately the width of the CSI data path is unknown, so bandwidth estimates are difficult. The most likely scenario is that CSI is 8 or 16 bits wide, which would yield 64 and 128GB/s respectively.
    Tukwila also has an on-die CSI router, and cache coherency directories. The router will improve latency for all systems, and the directories should ensure near linear system scalability for large (> 4 socket) systems. It is almost certain that the four full width CSI links will be used for a 2D torus topology, while the half width links will connect to I/O subsystems. This architecture is rather similar to the EV7, which was the first high performance MPU to have an on-die memory controller, router, directories and interconnects. It should hardly be surprising that Intel is following in the footsteps of the EV7, considering that many former DEC architects are now at Intel.

    Performance

    Intel has estimated 40GFLOPS for Tukwila, using four cores. These cores will be very similar to those in Montecito. Hence, each CPU provides 4 FLOPS/cycle, implying that the device will operate at 2.5GHz. While Intel did not comment on whether Tukwila uses multithreading, it is most likely that each core has two threads, like Montecito, and a total of 8 threads per socket. The slide claims to improve on Montecito's scalar performance by a factor of 1.3. However, it is unclear what this claim means. Is scalar performance measured by SPECint_2000, SPECfp_2000 or perhaps another benchmark? Was the slide referring to Montecito at 2GHz, as was originally planned, or the 1.6GHz Montecito that will actually ship? These mysteries will undoubtedly be cleared up at a future conference, perhaps IDF, Hot Chips or ISSCC; for now though, this leaves a bit to the imagination.
    For those who prefer a more visual representation, the slide from Intel’s presentation is below.


    [​IMG]



    http://www.realworldtech.com/page.cfm?NewsID=361&section=news&date=05-05-2006#361
     
  2. sike

    sike I'm cool cuz I Fold

    26Mb de Cache ? wtf :o
     
  3. Rapid_Eraser

    Rapid_Eraser The Legend Folder

    Bom é impressao minha ou a intençao da Intel desta vez é mesmo acabar com a AMD. N devem ter gostado de ter a AMD a pica-los para fazerem comparaçoes de performance entre os processadores q vendiam. Vamos lá ver se os K8L dão a volta a esta tendencia...
     
  4. BarroZo

    BarroZo Power Member


    24 :P

    mas 24mb de cache não é um bocado exagerado ??
     
  5. Koncaman

    Koncaman Utilizador Saloio

    Vamos la a ver se isto não vai ser mais uma pedra (ou calhau!) no sapato da intel, como foi o itanium II (o Titanic :p).
    a intel insiste nele. este parece ter mais alguns argumentos. mas não sei ate que ponto vale investir num CPU destes.
    especialmente vendo que a plataforma opteron esta a ter uma aceitação superior.
     
  6. Helixsk8

    Helixsk8 I quit My Job for Folding

    Calma fui eu que entendi mal ou este cpu já tem controlador de memória integrado como os amd?!
    E que se assim for deve ser um monstro :| :002: :002: :002:
     
  7. Zarolho

    Zarolho Power Member

    Estava a ver que ninguém notava...:)

    Na minha opinião, ao olhar para esta tecnologia, imagino que não deverá ser muito diferente do que vamos ver em 2008, nos desktops.
     
  8. Kursk_crash

    Kursk_crash Banido

    ew

    Este Itanium..

    quantos mais cores, mais se afunda...lol....
     
  9. ptzs

    ptzs Power Member

    Tanto enterram dinheiro neste tipo de processador que às tantas tem de valer alguma coisa no mundo real.

    Espero é que consigam os 2.5Ghz, embora seja um salto grande desde 1.6Ghz.
     

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