Optimal number and kind of execution units

By: Exophase (exophase.delete@this.gmail.com), October 1, 2015 10:11 pm
Room: Moderated Discussions
Patrick Chase (patrickjchase.delete@this.gmail.com) on October 1, 2015 5:38 pm wrote:
> IMO even a 3:1 alu:mem ratio is uncomfortable, and 2:1
> is a practical minimum to avoid being memory-op-bound.
>

I concur, 1.5-2:1 is a good place to be for most loads. Which is probably why most decent uarchs have settled for something around here. Meanwhile, the ones that fall outside this range Netburst or Loongson (dunno about the latest iteration) don't end up looking so great.
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TopicPosted ByDate
Update to Intel Optimization ManualSHK2015/09/29 05:38 AM
  gather speedEric Bron2015/09/29 09:43 AM
    gather speedGabriele Svelto2015/09/29 12:00 PM
  Update to Intel Optimization ManualTim McCaffrey2015/09/29 11:18 AM
    Update to Intel Optimization ManualSHK2015/09/29 12:04 PM
      Update to Intel Optimization ManualAnon2015/09/29 02:23 PM
    Update to Intel Optimization Manualnone2015/09/29 10:31 PM
      Update to Intel Optimization ManualMichael S2015/09/30 04:24 AM
    Update to Intel Optimization ManualMichael S2015/09/30 04:30 AM
      Update to Intel Optimization ManualTim McCaffrey2015/09/30 10:01 AM
  5-6 wide core, why no mention from Intel?Wouter Tinus2015/09/30 02:14 PM
    5-6 wide core, why no mention from Intel?Maynard Handley2015/09/30 03:30 PM
      5-6 wide core, why no mention from Intel?Alberto2015/10/01 12:13 AM
        5-6 wide core, why no mention from Intel?anon2015/10/01 02:21 AM
          5-6 wide core, why no mention from Intel?Alberto2015/10/01 04:41 AM
            5-6 wide core, why no mention from Intel?anon2015/10/01 05:27 AM
              5-6 wide core, why no mention from Intel?Alberto2015/10/01 08:33 AM
                5-6 wide core, why no mention from Intel?juanrga2015/10/01 10:24 AM
        5-6 wide core, why no mention from Intel?Maynard Handley2015/10/01 08:57 AM
    5-6 wide core, why no mention from Intel?juanrga2015/10/01 03:59 AM
      5-6 wide core, why no mention from Intel?Wouter Tinus2015/10/01 02:48 PM
        5-6 wide core, why no mention from Intel?juanrga2015/10/03 03:17 AM
          5-6 wide core, why no mention from Intel?Wouter Tinus2015/10/03 11:19 AM
            Are you kidding? (NT)juanrga2015/10/04 05:30 AM
              Are you kidding?Wouter Tinus2015/10/04 03:18 PM
                Are you kidding?juanrga2015/10/05 09:46 AM
                  Are you kidding?David Kanter2015/10/05 11:24 AM
                    Are you kidding?anon2015/10/05 09:26 PM
                    Are you kidding?Linus Torvalds2015/10/07 04:49 AM
                      Are you kidding?juanrga2015/10/07 10:46 AM
                        Are you kidding?anon2015/10/07 06:21 PM
                  Are you kidding?Wouter Tinus2015/10/05 01:25 PM
                    Are you kidding?juanrga2015/10/06 10:17 AM
                      Are you kidding?Stubabe2015/10/07 12:17 AM
                        Are you kidding?juanrga2015/10/07 10:56 AM
                          Amazing...Wouter Tinus2015/10/07 11:31 AM
                            Amazing...juanrga2015/10/07 03:45 PM
                          Are you kidding?Stubabe2015/10/07 11:57 AM
                            Are you kidding?juanrga2015/10/07 03:59 PM
                          Are you kidding?Wilco2015/10/07 02:07 PM
                            Are you kidding?juanrga2015/10/07 04:33 PM
      5-6 wide core, why no mention from Intel?Eric Bron2015/10/04 04:18 AM
    5-6 wide core, why no mention from Intel?David Kanter2015/10/01 09:01 AM
      Optimal number and kind of execution unitsjuanrga2015/10/01 10:50 AM
        Optimal number and kind of execution unitsPatrick Chase2015/10/01 04:38 PM
          Optimal number and kind of execution unitsI.S.T.2015/10/01 05:10 PM
            Optimal number and kind of execution unitsPatrick Chase2015/10/01 11:39 PM
          Optimal number and kind of execution unitsExophase2015/10/01 10:11 PM
          Optimal number and kind of execution unitsjuanrga2015/10/02 05:14 AM
      LD/ST unitsSHK2015/10/01 11:11 AM
        LD/ST unitsDavid Kanter2015/10/01 12:54 PM
          LD/ST unitsSHK2015/10/02 04:55 AM
            LD/ST unitsJukka Larja2015/10/02 09:49 PM
        LD/ST unitsMaynard Handley2015/10/01 01:01 PM
          LD/ST unitsanon2015/10/01 09:54 PM
      5-6 wide core, why no mention from Intel?Maynard Handley2015/10/01 12:57 PM
        5-6 wide core, why no mention from Intel?David Kanter2015/10/01 03:49 PM
          5-6 wide core, why no mention from Intel?Maynard Handley2015/10/01 06:21 PM
          5-6 wide core, why no mention from Intel?Exophase2015/10/01 10:07 PM
            5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 12:10 AM
              5-6 wide core, why no mention from Intel?Megol2015/10/02 03:39 AM
                5-6 wide core, why no mention from Intel?Michael S2015/10/02 04:27 AM
                5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 09:37 AM
                  5-6 wide core, why no mention from Intel?noko2015/10/02 05:19 PM
              5-6 wide core, why no mention from Intel?Exophase2015/10/02 06:43 AM
                5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 09:45 AM
                  5-6 wide core, why no mention from Intel?Exophase2015/10/02 10:23 AM
          5-6 wide core, why no mention from Intel?Wilco2015/10/02 12:48 PM
            5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 01:25 PM
              5-6 wide core, why no mention from Intel?Wilco2015/10/02 02:26 PM
              5-6 wide core, why no mention from Intel?noko2015/10/02 05:45 PM
                5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 06:54 PM
            5-6 wide core, why no mention from Intel?David Kanter2015/10/02 01:59 PM
              5-6 wide core, why no mention from Intel?Wilco2015/10/02 02:59 PM
                5-6 wide core, why no mention from Intel?David Kanter2015/10/02 03:15 PM
                  5-6 wide core, why no mention from Intel?Wilco2015/10/02 04:06 PM
                    LDP/STP usage in AArch64 for 403.gccnone2015/10/03 01:04 AM
                      LDP/STP usage in AArch64 for 403.gccWilco2015/10/03 03:02 AM
                        LDP/STP usage in AArch64 for 403.gccnone2015/10/03 03:11 AM
                          LDP/STP usage in AArch64 for 403.gccWilco2015/10/03 03:37 AM
                            LDP/STP usage in AArch64 for 403.gccnone2015/10/03 04:37 AM
                              LDP/STP usage in AArch64 for 403.gccWilco2015/10/03 05:26 AM
                  5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 04:24 PM
              5-6 wide core, why no mention from Intel?Maynard Handley2015/10/02 03:07 PM
  Update to Intel Optimization Manualanon2015/09/30 04:43 PM
  Update to Intel Optimization ManualPatrick Chase2015/09/30 09:44 PM
    Update to Intel Optimization Manualanon2015/09/30 10:49 PM
    Update to Intel Optimization Manualnone2015/09/30 10:50 PM
    Update to Intel Optimization ManualDavid Kanter2015/10/01 12:52 PM
      Update to Intel Optimization ManualPatrick Chase2015/10/01 04:16 PM
        Update to Intel Optimization Manualanon2015/10/01 10:45 PM
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