ISSCC Poulson Preview Online - OoO not unlikely?

Article: New Itanium Microarchitecture at ISSCC 2011
By: someone (someone.delete@this.somewhere.com), November 21, 2010 4:50 pm
Room: Moderated Discussions
Richard Cownie (tich@pobox.com) on 11/21/10 wrote:
---------------------------
>someone (someone@somewhere.com) on 11/21/10 wrote:
>---------------------------
>
>>The story is similar for stalls. A stall itself does not use
>>any energy on its own unless the CPU suffers a replay
>>trap in the course of handling it. IPF processors do not
>>use replay traps.
>
>Huh ? If the processor is stalled for a few cycles, or a few tens of cycles,
>or a few hundreds of cycles (for DRAM latency) then it very definitely*is* consuming
>some power during that time, at least for leakage.

Sure deep sub micron CMOS leaks. It leaks whether
the processor is active or stalled. Other things on the
chip run whether the processor is stalled or not that
also consume power (PLL, global clock distribution etc).
But there is no meaningful energy associated with a
stall as an architectural event unless there is a replay
trap etc associated with it.

>
>Having thirty quazillion transistors sitting around waiting for a cache miss
>is bad for energy usage and bad for price-performance.
>
>And what might perhaps have been a respectable idea back in the days
>of 3nS core cycle and 250nS memory latency is almost certainly a much
>worse idea in the days of 0.25nS core cycle and 80nS memory latency -
>instead of 80 cycles or so, it's up to several hundred cycles.
>

Yeah it sucks that modern workloads can't execute
entirely out of L1. Let us know if you figure out a way
around it.
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
ISSCC Poulson Preview OnlineDavid Kanter2010/11/17 03:40 AM
  ISSCC Poulson Preview Onlinesavantu2010/11/17 05:25 AM
  ISSCC Poulson Preview Onlinesomeone2010/11/17 08:51 AM
    ISSCC Poulson Preview OnlineLinus Torvalds2010/11/17 09:27 AM
      ISSCC Poulson Preview Onlinesomeone2010/11/17 10:31 AM
        ISSCC Poulson Preview OnlineRichard Cownie2010/11/17 10:55 AM
          ISSCC Poulson Preview OnlineLinus Torvalds2010/11/17 11:30 AM
          ISSCC Poulson Preview Onlinesomeone2010/11/17 11:42 AM
            ISSCC Poulson Preview Onlinea reader2010/11/17 02:07 PM
        ISSCC Poulson Preview OnlineGabriele Svelto2010/11/19 02:52 AM
          ISSCC Poulson Preview Onlinesavantu2010/11/19 05:37 AM
    ISSCC Poulson Preview OnlineDavid Kanter2010/11/17 12:12 PM
      ISSCC Poulson Preview Onlinesomeone2010/11/17 12:40 PM
        ISSCC Poulson Preview OnlineDavid Kanter2010/11/17 02:08 PM
          ISSCC Poulson Preview Onlineajensen2010/11/18 01:24 AM
  ISSCC Poulson Preview Onlinelubemark2010/11/17 09:52 AM
  ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/17 11:41 AM
    ISSCC Poulson Preview Online - OoO not unlikely?Linus Torvalds2010/11/17 12:12 PM
      ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/17 05:38 PM
        ISSCC Poulson Preview Online - OoO not unlikely?Linus Torvalds2010/11/17 08:03 PM
    ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/17 12:14 PM
      ISSCC Poulson Preview Online - OoO not unlikely?Richard Cownie2010/11/17 02:07 PM
        ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/17 02:59 PM
          ISSCC Poulson Preview Online - OoO not unlikely?sylt2010/11/17 03:26 PM
          ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/17 05:53 PM
            ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/17 08:34 PM
              ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/17 09:22 PM
              ISSCC Poulson Preview Online - OoO not unlikely?Martin Høyer Kristiansen2010/11/18 12:35 AM
                ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/18 01:14 AM
                  ISSCC Poulson Preview Online - OoO not unlikely?Martin Høyer Kristiansen2010/11/18 02:00 AM
          ISSCC Poulson Preview Online - OoO not unlikely?Groo2010/11/18 03:28 PM
            ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/18 09:30 PM
              ISSCC Poulson Preview Online - OoO not unlikely?Doug Siebert2010/11/19 12:06 AM
                ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/19 07:52 AM
                  Negativity and ignorancePaul A. Clayton2010/11/19 06:11 PM
                  rhetoricshobold2010/11/20 05:01 AM
              ISSCC Poulson Preview Online - OoO not unlikely?anonymous2010/11/19 02:17 AM
                ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/19 08:22 AM
                  ISSCC Poulson Preview Online - OoO not unlikely?Linus Torvalds2010/11/19 09:26 AM
                    ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/19 11:04 AM
                      ISSCC Poulson Preview Online - OoO not unlikely?Linus Torvalds2010/11/19 11:24 AM
                        ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/19 12:05 PM
                          ISSCC Poulson Preview Online - OoO not unlikely?Linus Torvalds2010/11/19 01:08 PM
                            ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/20 11:02 AM
                              ISSCC Poulson Preview Online - OoO not unlikely?dc2010/11/20 12:59 PM
                              ISSCC Poulson Preview Online - OoO not unlikely?dc2010/11/20 01:01 PM
                                ISSCC Poulson Preview Online - OoO not unlikely?rwessel2010/11/20 01:27 PM
                                  ISSCC Poulson Preview Online - OoO not unlikely?dc2010/11/21 05:00 PM
                                    single-system single-location != RASanonymous2010/11/21 09:33 PM
                                      single-system single-location != RASdc2010/11/25 12:06 PM
                                        single-system single-location != RASDavid Kanter2010/11/25 01:58 PM
                    CS:SNAREPslacker2010/11/20 04:07 AM
                      CS:SNAREPnone2010/11/20 04:53 AM
                        CS:SNAREPS. Rao2010/11/20 11:20 AM
                      CS:SNAREPGabriele Svelto2010/11/22 07:11 AM
                  ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/19 11:08 AM
                    ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/19 06:51 PM
                      ISSCC Poulson Preview Online - OoO not unlikely?rwessel2010/11/20 01:53 AM
                        ISSCC Poulson Preview Online - OoO not unlikely?dc2010/11/20 12:43 PM
                          ISSCC Poulson Preview Online - OoO not unlikely?anon2010/11/20 05:43 PM
                            ISSCC Poulson Preview Online - OoO not unlikely?Foo_2010/11/20 05:56 PM
              ISSCC Poulson Preview Online - OoO not unlikely?Groo2010/11/20 12:59 PM
                P = E/tslacker2010/11/20 11:31 PM
                  P = E/tAndi Kleen2010/11/21 03:02 AM
                ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/21 10:24 AM
                  ISSCC Poulson Preview Online - OoO not unlikely?Richard Cownie2010/11/21 01:07 PM
                    ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/21 04:50 PM
                      ISSCC Poulson Preview Online - OoO not unlikely?Richard Cownie2010/11/21 05:38 PM
                        ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/21 06:27 PM
                          ISSCC Poulson Preview Online - OoO not unlikely?Richard Cownie2010/11/22 08:37 AM
                            ISSCC Poulson Preview Online - OoO not unlikely?someone2010/11/22 09:07 AM
                              ISSCC Poulson Preview Online - OoO not unlikely?Richard Cownie2010/11/22 09:25 AM
                                ISSCC Poulson Preview Online - OoO not unlikely?dc2010/11/25 12:22 PM
                                  ISSCC Poulson Preview Online - OoO not unlikely?Richard Cownie2010/11/26 10:44 AM
                              perfAM2010/11/24 03:28 AM
                                perfajensen2010/11/24 03:46 AM
                                perfsomeone2010/11/24 09:59 AM
                          OOOE and energy efficiencyDavid Kanter2010/11/23 11:28 AM
                            OOOE and energy efficiencysomeone2010/11/23 12:42 PM
                              OOOE and energy efficiencyDavid Kanter2010/11/23 06:00 PM
                                OOOE and energy efficiencyajensen2010/11/24 01:58 AM
                                  OOOE and energy efficiencyRichard Cownie2010/11/24 10:44 AM
                                    OOOE and energy efficiencyajensen2010/11/24 01:51 PM
                                      OOOE and energy efficiencyRichard Cownie2010/11/24 02:59 PM
                                        OOOE and energy efficiencyajensen2010/11/25 12:20 AM
                              OOOE and energy efficiencyChuck2010/11/23 10:04 PM
    ISSCC Poulson Preview Online - OoO not unlikely?ajensen2010/11/18 12:48 AM
  ISSCC Poulson Preview OnlineMatt Waldhauer2010/11/17 11:50 AM
    ISSCC Poulson Preview OnlineDavid Kanter2010/11/17 12:21 PM
    ISSCC Poulson Preview Onlinesomeone2010/11/17 12:51 PM
      ISSCC Poulson Preview OnlineMatt Waldhauer2010/11/18 07:38 AM
    ISSCC Poulson Preview OnlineDan Downs2010/11/18 10:15 AM
      ISSCC Poulson Preview OnlineMatt Waldhauer2010/11/23 03:19 AM
  OoOE IPFajensen2010/11/22 02:12 AM
    OoOE IPFanon2010/11/22 03:24 AM
      OoOE IPFajensen2010/11/22 03:46 AM
  ISSCC Poulson Preview Online- Abstractlubemark2010/11/22 08:02 AM
    ISSCC Poulson Preview Online- AbstractIntelUser20002010/11/22 09:49 AM
      ISSCC Poulson Preview Online- AbstractDavid Kanter2010/11/22 11:08 AM
      Cache sharingPaul A. Clayton2010/11/22 01:42 PM
  ISSCC Poulson Preview OnlineTwelve2011/03/23 01:32 PM
    ISSCC Poulson Preview OnlineDaniel Bizó2011/03/24 06:23 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell green?