Why the platform focus?

Article: Tukwila Update
By: someone (someone.delete@this.somewhere.com), February 8, 2009 7:26 pm
Room: Moderated Discussions
David Kanter (dkanter@realworldtech.com) on 2/8/09 wrote:
---------------------------
>someone (someone@somewhere.com) on 2/8/09 wrote:
>---------------------------
>>Michael S (already5chosen@yahoo.com) on 2/8/09 wrote:
>>---------------------------
>>
>>>Which is not much taking into account four cores and all new uncore stuff. Remember that Montvale is 104 W.
>>>In fact. with proposed less aggressive low-level circuited technique 2GHz at 170W
>>>already looks like very aggressive target.
>>
>>http://www.itaniumsolutions.org/itanium_processor__tukwila
>>
>>"Tukwila is based on Intel's 65nm process technology and has an early clock speed
>of up to 2GHz at both 170W and 130W."
>>
>>
>>> Unless they finally made Foxton replacement working.
>>
>>Tukwila uses basically the same dynamic power management
>>system that is shipping now in i7 - an all digital scheme >with
>>deterministic decision making and discrete V/F points.
>
>I don't know if that's entirely true. The system in Tukwila still looks a lot
>more aggressive and fine-grained than what is used in Nehalem. Again, I'm not an
>expert here, but that's according to my parsing.
>
>Nehalem is really all about sensing when cores are idle and power gating them off.
>Then you can move up a 'bin' of frequency.
>
>Tukwila's system focuses primarily on measuring cap. across the chip with performance
>monitoring and then resynching PLLs in a single cycle to adjust up to Fmax.
>
>David

Yeah, Tukwila's scheme is a bit more comprehensive
but the key operating principles and design challenges
are the same. The i7 is proof of concept for Tukwila.

There is a very good article on Tukwila in the January
issue of JSSC which describes the power management
scheme in detail. Tukwila clocks its CPUs in integer
multiples of 133 MHz - i.e. 1.60, 1.73, 1.86, 2.00 GHz,
so 133 MHz is the minimum step size for changes in
frequency.

All Tukwilas monitor and sum power weighted activity
levels in the four CPUs and the system interface the
same way and apply the same decision thresholds
every 8 us to choose between max F, max F less 133
MHz, max F less 266 MHz etc to stay within TDP.

All Tukwilas of the same SKU have the same activity
level to frequency map as well as the same TDP.

Each individual Tukwila has a frequency/voltage map
specific to that device that ensures it stays within the
TDP specified for its SKU.

This power management system is all-digital which
ensures identical operation between any two devices
as well as identical operation between different runs
on the same device. The Foxton scheme in Montecito
couldn't ensure either which is why it wasn't used.
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TopicPosted ByDate
Tukwila Update - article onlineDavid Kanter2009/02/05 12:03 AM
  Tukwila Update - article onlineDan2009/02/05 03:17 AM
    Tukwila Update - article onlineJoe Chang2009/02/05 09:16 AM
    Tukwila Update - article onlineTemp2009/02/05 09:25 AM
      Tukwila Update - article onlinePaul2009/02/05 12:29 PM
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            Great. Finally hard numbersMichael S2009/02/06 04:46 AM
            Tukwila Update - article onlinelubemark2009/02/06 05:54 AM
              Tukwila Update - article onlinePhil2009/02/06 07:29 AM
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                Tukwila Update - article onlineRagingDragon2009/02/07 03:51 PM
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                Tukwila Update - article onlinesomeone2009/02/06 09:19 AM
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      Why the platform focus?Vincent Diepeveen2009/02/05 09:29 AM
        Why the platform focus?savantu2009/02/05 10:34 PM
          Why the platform focus?Vincent Diepeveen2009/02/05 11:09 PM
          Why the platform focus?Phil2009/02/06 01:10 AM
            Why the platform focus?savantu2009/02/06 01:50 AM
              Why the platform focus?Phil2009/02/06 07:09 AM
                Why the platform focus?savantu2009/02/06 10:08 AM
                Why the platform focus?someone2009/02/06 10:21 AM
                  Why the platform focus?mpx2009/02/06 02:04 PM
                    Why the platform focus?someone2009/02/06 02:16 PM
                Why the platform focus?RagingDragon2009/02/07 04:16 PM
                Why the platform focus?mas2009/02/25 08:28 AM
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                itanium bigger than entire car industryDevon Welles2009/02/06 07:51 AM
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                    itanium bigger than entire car industryVincent Diepeveen2009/02/08 05:35 AM
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      Yes it doesm performance mattersbob2009/02/05 10:51 AM
        Yes it doesm performance mattersVenki2009/02/05 11:06 AM
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        Why the platform focus?savantu2009/02/06 02:00 AM
    Why the platform focus?someone2009/02/05 10:49 AM
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        Why the platform focus?Default2009/02/05 01:29 PM
          Why the platform focus?anon2009/02/05 02:08 PM
        Why the platform focus?someone2009/02/05 02:24 PM
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    Why the platform focus?slacker2009/02/05 01:41 PM
      Why the platform focus?RagingDragon2009/02/05 10:57 PM
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        Why the platform focus?slacker2009/02/06 01:58 PM
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            Why the platform focus?someone2009/02/08 09:38 AM
              Why the platform focus?David Kanter2009/02/08 04:27 PM
                Why the platform focus?someone2009/02/08 07:26 PM
                  Why the platform focus?savantu2009/02/09 12:35 AM
          Why the platform focus?someone2009/02/08 09:53 AM
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      All x86 SpecInt scores are useless due to autopar (NT)Paradox2009/02/06 08:47 AM
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      Why the platform focus?Linus Torvalds2009/02/06 08:14 AM
        Why the platform focus?savantu2009/02/06 10:37 AM
          Why the platform focus?Linus Torvalds2009/02/06 12:49 PM
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                Intel puts its money where its mouth issomeone2009/02/08 02:24 PM
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                    mission-criticalmpx2009/02/09 02:30 AM
                      mission-criticalrwessel2009/02/09 03:23 PM
                    mission-criticalanon2009/02/09 03:55 AM
                    mission-criticalEduardoS2009/02/09 05:17 PM
                      mission-criticalDean Kent2009/02/09 08:11 PM
                        mission-criticalMichael S2009/02/10 05:20 AM
                          mission-criticalDean Kent2009/02/10 07:26 AM
                            mission-criticalMichael S2009/02/10 08:01 AM
                              mission-criticalDean Kent2009/02/10 01:36 PM
                            mission-criticalsomeone2009/02/10 09:05 AM
                              mission-criticalDean Kent2009/02/10 01:22 PM
                                mission-criticalZt2009/02/22 04:54 PM
                          mission-criticalanon2009/02/10 10:41 PM
                        mission-criticalEduardoS2009/02/10 01:46 PM
                          mission-criticalDean Kent2009/02/10 02:31 PM
                        mission-criticalslacker2009/02/10 07:30 PM
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                Sun and x86 server differentiationmax2009/02/07 03:30 AM
                Sun and x86 server differentiationsomeone2009/02/07 10:19 AM
                  Sun and x86 server differentiationLinus Torvalds2009/02/07 10:44 AM
                Sun and x86 server differentiationRagingDragon2009/02/07 06:09 PM
                  Sun and x86 server differentiationMichael S2009/02/08 05:05 AM
                    Sun and x86 server differentiationRagingDragon2009/02/10 12:03 AM
                    Sun and x86 server differentiationJesper Frimann2009/02/10 12:51 AM
                      Sun and x86 server differentiationAlex Jones2009/02/10 01:43 PM
            Why the platform focus?bob2009/02/08 04:51 AM
              Why the platform focus?someone2009/02/08 09:23 AM
          missing the big pictureAM2009/02/18 06:43 AM
            missing the big pictureMichael S2009/02/18 08:42 AM
              missing the big pictureAM2009/02/18 09:03 AM
        Why the platform focus?mpx2009/02/06 12:47 PM
          Itanium - slowest and most obsolete server CPU family in the world, NOW.mpx2009/02/06 04:48 PM
            Itanium - slowest and most obsolete server CPU family in the world, NOW.Paul2009/02/07 02:56 PM
              z series?Michael S2009/02/07 03:12 PM
              Itanium - slowest and most obsolete server CPU family in the world, NOW.someone else2009/02/24 04:37 AM
                Itanium - slowest and most obsolete server CPU family in the world, NOW.EduardoS2009/02/24 06:55 AM
                  Itanium - slowest and most obsolete server CPU family in the world, NOW.someone else2009/02/25 01:55 AM
                    Itanium - slowest and most obsolete server CPU family in the world, NOW.Michael S2009/02/25 02:27 AM
          Why the platform focus?RagingDragon2009/02/07 06:18 PM
            Why the platform focus?Paul2009/02/08 01:10 PM
              Why the platform focus?Jukka Larja2009/02/08 11:04 PM
        Why the platform focus?slacker2009/02/06 02:10 PM
          Why the platform focus?Linus Torvalds2009/02/06 02:40 PM
            Why the platform focus?savantu2009/02/06 02:51 PM
            Why the platform focus?someone2009/02/06 02:58 PM
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                Why the platform focus?someone2009/02/07 10:10 AM
                  Why the platform focus?Linus Torvalds2009/02/07 10:40 AM
                    Why the platform focus?someone2009/02/07 12:24 PM
                      Why the platform focus?Doug Siebert2009/02/08 12:32 AM
                        Why the platform focus?max2009/02/08 04:57 AM
                          Why the platform focus?Michael S2009/02/08 05:20 AM
                        Why the platform focus?someone2009/02/08 09:15 AM
                          Why the platform focus?Doug Siebert2009/02/08 11:36 PM
                      Why the platform focus?hobold2009/02/09 05:49 AM
                Why the platform focus?anon2009/02/24 01:57 AM
                  Why the platform focus?Linus Torvalds2009/02/24 09:45 AM
                    Why the platform focus?savantu2009/02/24 12:30 PM
                      Why the platform focus?slacker2009/02/24 01:51 PM
                        Why the platform focus?savantu2009/02/25 12:04 AM
                          Why the platform focus?Michael S2009/02/25 02:34 AM
                          Why the platform focus?anon2009/02/25 10:17 AM
                      Why the platform focus?max2009/02/25 11:15 AM
                    Why the platform focus?someone2009/02/24 05:43 PM
                      Why the platform focus?Doug Siebert2009/02/24 08:26 PM
                        Why the platform focus?Howard Chu2009/02/25 03:07 AM
                          Why the platform focus?someone2009/02/25 06:48 AM
                        Why the platform focus?someone2009/02/25 06:41 AM
                          Why the platform focus?Linus Torvalds2009/02/25 09:17 AM
                            Why the platform focus?someone2009/02/25 09:55 AM
                              has anyone seen Tukwila silicon?anon2009/02/25 10:38 AM
                              Why the platform focus?Linus Torvalds2009/02/25 11:05 AM
                                Why the platform focus?slacker2009/02/25 01:11 PM
                                Why the platform focus?a reader2009/02/26 09:11 PM
                                  Why the platform focus?rcf2009/02/27 01:32 PM
                                    Why the platform focus?max2009/02/27 02:11 PM
                                      Why the platform focus?rcf2009/02/27 03:50 PM
                            Why the platform focus?Vincent Diepeveen2009/02/25 04:30 PM
                            $40M sale to $16M companybob2009/02/25 08:25 PM
                              $40M sale to $16M companyRichard Cownie2009/02/26 12:21 PM
                  Why the platform focus?anonymous2009/02/24 11:52 AM
                    Why the platform focus?savantu2009/02/24 12:20 PM
                      Why the platform focus?anonymous2009/02/24 03:31 PM
                        Why the platform focus?savantu2009/02/25 12:05 AM
                        Why the platform focus?someone else2009/02/25 01:04 AM
                          Why the platform focus?Michael S2009/02/25 01:42 AM
                            Put me down for $500 that Poulson doesn't arrive earlier than Q4/2011 (NT)slacker2009/02/25 12:39 PM
                        Why the platform focus?someone2009/02/25 06:54 AM
                          Why the platform focus?anonymous2009/02/25 09:46 AM
                            Why the platform focus?someone2009/02/25 10:22 AM
                            Why the platform focus?anon2009/02/25 11:01 AM
                              Why the platform focus?anonymous2009/02/25 11:54 AM
                  Why the platform focus?mpx2009/02/24 02:11 PM
                    Why the platform focus?anon2009/02/24 08:57 PM
                      Why the platform focus?Doug Siebert2009/02/24 10:04 PM
                        Why the platform focus?anon2009/02/24 10:46 PM
                          Why the platform focus?Doug Siebert2009/02/25 05:13 PM
                            Why the platform focus?anon2009/02/25 08:53 PM
                              Why the platform focus?bob2009/02/25 09:00 PM
                                Please try to keep up (NT)anon2009/02/25 09:49 PM
                              Why the platform focus?Doug Siebert2009/02/26 12:09 AM
                                Why the platform focus?anon2009/02/26 01:12 AM
                                Why the platform focus?Michael S2009/02/26 02:16 AM
                                  Why the platform focus?James2009/02/26 06:09 AM
                                    sufficiently intimate with the OSMichael S2009/02/26 06:29 AM
                                      sufficiently intimate with the OSanon2009/02/27 01:01 AM
                                      sufficiently intimate with the OSHoward Chu2009/02/27 01:37 AM
                      Why the platform focus?Michael S2009/02/25 02:02 AM
                        Why the platform focus?anon2009/02/25 03:07 AM
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                Why the platform focus?Vincent Diepeveen2009/02/08 10:16 AM
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                  Intels financial statusVincent Diepeveen2009/02/25 12:02 PM
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        Why the platform focus?Default2009/02/06 09:57 AM
          Why the platform focus?Vincent Diepeveen2009/02/06 10:59 AM
          Why the platform focus?RagingDragon2009/02/07 06:43 PM
  Tukwila Update - article onlineVincent Diepeveen2009/02/05 09:11 AM
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