x86 penalty depends on performance and microarchitecture

Article: Microservers must Specialize to Survive
By: Patrick Chase (patrickjchase.delete@this.gmail.com), February 1, 2013 10:11 pm
Room: Moderated Discussions
David suggested posting this to the forum. I think he has a few remarks of his own to add on this topic...

I think that the statement that x86 takes 5-15% more area than RISC is a bit simplistic, because the penalty is highly variable depending on what performance level you're targeting and what sort of microarchitecture you have to use to get there.

As a simple example, x86 is utterly noncompetitive at the area/performance/power levels of, say, a Cortex M1/M3/M4 or even an R4. We saw the same thing in the mid 80s (compare MIPS R3K to 80386 at similar area, or R3K to 80486 at similar performance) and we see it now in the low end of the embedded market. x86 has traditionally been forced to rely on microcode and to forego micropipelining (as opposed to functional unit level pipelining a la 80386) to hit such low area targets, and that kills performance. RISCs win the area comparison by significant integer factors in that regime - It took Intel's million-transitor 80486 to catch up to an R3000 system (including caches and FPU) that totalled a few hundred thousand transistors.

x86 starts to be marginally competitive once you get to dual-issue in-order superscalars (P5 vs. contemporaries in the late 80s; Atom vs. A8/A9 [*] today etc). The "x86 penalty" becomes fairly trivial once you get up to full-blown out-of-order Tomasulo machines and the like. We saw that with P6 vs. contemporaries, and I expect that we'll see it again shortly once Intel gets their Bonnell replacement out. That's *very* relevant to the discussion at hand, because the ARM microserver advocates seem to be taking area/performance advantages in the A8/A9 regime, and assuming those will hold when comparing Cortex A-57 to its Intel competitors. Based on history I don't think that's a very smart bet.

My own take is that for ARM-based microservers to survive they need to stay down in the "many weak cores" regime and focus on massively parallel workloads that can tolerate the latency penalty. If they try to move up into higher performance brackets then they'll be playing directly into Intel's hand.

[*] Yes, I do realize that the A9 is OoO. It's capabilities in that regard are so limited that one wonders why they bothered, though. Embedded workloads are typically recompiled and optimized for each product and often use explicit prefetch to "expose" cache misses, and both of those tend to reduce the advantage of OoO.
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Article Online: Microservers must Specialize to SurviveDavid Kanter2013/01/28 01:47 PM
  Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/29 04:42 AM
    Article Online: Microservers must Specialize to SurviveMichael S2013/01/29 06:09 AM
      Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/29 07:01 AM
        Article Online: Microservers must Specialize to SurviveDavid Kanter2013/01/29 01:35 PM
          Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/29 02:42 PM
            Article Online: Microservers must Specialize to SurviveDavid Kanter2013/01/30 12:12 AM
              Article Online: Microservers must Specialize to SurviveMichael S2013/01/30 02:06 AM
              Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/30 09:58 AM
              Article Online: Microservers must Specialize to SurviveDoug S2013/01/30 12:38 PM
                FRU type and granularity selectionPaul A. Clayton2013/01/30 02:29 PM
                  FRU type and granularity selectionrwessel2013/01/30 04:00 PM
                    FRU type and granularity selectionEtienne2013/01/31 03:26 AM
                Article Online: Microservers must Specialize to SurviveMaynard Handley2013/02/13 02:46 PM
                  Article Online: Microservers must Specialize to SurviveDavid Kanter2013/02/16 03:16 PM
                    Article Online: Microservers must Specialize to SurviveDoug S2013/02/17 12:24 PM
        Article Online: Microservers must Specialize to SurviveJohan2013/02/01 01:40 AM
          Article Online: Microservers must Specialize to SurvivePer Hesselgren2013/02/01 03:06 AM
            Article Online: Microservers must Specialize to SurvivePer Hesselgren2013/02/01 03:13 AM
    Article Online: Microservers must Specialize to Survivebakaneko2013/01/29 06:49 AM
      Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/29 07:19 AM
        Article Online: Microservers must Specialize to Survivebakaneko2013/01/29 09:47 AM
          Article Online: Microservers must Specialize to Survivebakaneko2013/01/29 02:18 PM
            Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/29 06:14 PM
              Article Online: Microservers must Specialize to SurviveDavid Kanter2013/01/29 11:51 PM
                Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/30 08:34 AM
                  Article Online: Microservers must Specialize to Surviveanon2013/01/31 06:45 AM
                    Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/31 12:25 PM
                      Article Online: Microservers must Specialize to Surviveanon2013/01/31 12:47 PM
                        Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/31 01:36 PM
                          Article Online: Microservers must Specialize to Surviveanon2013/01/31 04:59 PM
                            Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/31 05:37 PM
                              Article Online: Microservers must Specialize to Surviveanon2013/01/31 06:47 PM
                                Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/31 07:16 PM
                                  Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/31 07:36 PM
                                    Article Online: Microservers must Specialize to Surviveanon2013/02/01 01:47 AM
                                      Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/01 04:26 AM
                                        Article Online: Microservers must Specialize to Surviveanon2013/02/01 05:56 AM
                                          Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/01 06:35 AM
                                            Article Online: Microservers must Specialize to SurviveMichael S2013/02/01 07:07 AM
                                            Article Online: Microservers must Specialize to Surviveanon2013/02/01 08:08 AM
                                              Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/01 08:49 AM
                                                Article Online: Microservers must Specialize to Surviveanon2013/02/01 09:36 AM
                                                  Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/01 10:11 AM
                                                    Article Online: Microservers must Specialize to Surviveanon2013/02/01 06:57 PM
                                                      Article Online: Microservers must Specialize to Surviverwessel2013/02/02 01:42 AM
                                                      Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/02 06:41 AM
                                                        Article Online: Microservers must Specialize to SurviveRicardo B2013/02/02 02:14 PM
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                                                            Article Online: Microservers must Specialize to SurviveRicardo B2013/02/02 04:05 PM
                                                              Article Online: Microservers must Specialize to SurviveMichael S2013/02/02 04:20 PM
                                                              Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/02 05:05 PM
                                                                ASP estimatesRichard Cownie2013/02/02 06:07 PM
                                                                  ASP estimatesRicardo B2013/02/02 06:48 PM
                                                                    ASP estimatesRichard Cownie2013/02/02 07:04 PM
                                                                      ASP estimatesanon2013/02/02 10:19 PM
                                                                        ASP estimatesRichard Cownie2013/02/03 06:06 AM
                                                                          ASP estimates...cache?Per Hesselgren2013/02/03 12:08 PM
                                                                      ASP estimatesMichael S2013/02/03 02:51 AM
                                                                        ASP estimatesRichard Cownie2013/02/03 06:10 AM
                                                                          ASP estimatesDaniel Bizo2013/02/04 03:45 PM
                                                                            ASP estimatesRichard Cownie2013/02/04 05:01 PM
                                                                              ASP estimatesJS2013/02/05 04:25 AM
                                                                              ASP estimatesDaniel Bizo2013/02/05 06:31 AM
                                                                                ASP estimatesRichard Cownie2013/02/05 06:46 AM
                                                                  ARM OEMs get free silicon?someone2013/02/03 01:44 PM
                                                                    ARM OEMs get free silicon?Richard Cownie2013/02/03 08:28 PM
                                                                      ARM OEMs get free silicon?Doug S2013/02/04 11:08 AM
                                                                        ARM OEMs get free silicon?Richard Cownie2013/02/04 12:17 PM
                                                                          ARM OEMs get free silicon?geeker2013/02/06 12:16 PM
                                                                            ARM OEMs get free silicon?Gabriele Svelto2013/02/07 04:18 AM
                                                                              ARM OEMs get free silicon?izotop2013/02/07 06:11 AM
                                                                            ARM OEMs get free silicon?Richard Cownie2013/02/07 06:48 AM
                                                                Article Online: Microservers must Specialize to SurviveRicardo B2013/02/02 06:31 PM
                                                                  Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/02 06:55 PM
                                                                    Article Online: Microservers must Specialize to SurviveRicardo B2013/02/02 07:25 PM
                                                                      Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/02 07:50 PM
                                                                        Article Online: Microservers must Specialize to SurviveRicardo B2013/02/02 08:22 PM
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                                                                        Article Online: Microservers must Specialize to SurviveMichael S2013/02/03 02:22 AM
                                                                    Article Online: Microservers must Specialize to Surviveanon2013/02/02 10:21 PM
                                                                      Article Online: Microservers must Specialize to SurviveMichael S2013/02/03 02:40 AM
                                                                        Article Online: Microservers must Specialize to Surviveanon2013/02/03 03:54 AM
                                                                      Overlooking the advantage (or not) of x86 in different marketsDoug S2013/02/03 01:54 PM
                                                                Article Online: Microservers must Specialize to Surviveanon2013/02/02 10:14 PM
                                                                  Article Online: Microservers must Specialize to Surviveanon2013/02/02 10:32 PM
                                                                    Article Online: Microservers must Specialize to SurviveRichard Cownie2013/02/03 06:24 AM
                                                        Article Online: Microservers must Specialize to Surviveanon2013/02/02 10:08 PM
                                          Article Online: Microservers must Specialize to SurviveMichael S2013/02/01 06:41 AM
                                            Article Online: Microservers must Specialize to Surviveanon2013/02/01 07:41 AM
                            Article Online: Microservers must Specialize to SurviveDoug S2013/02/01 04:41 PM
                              Article Online: Microservers must Specialize to Surviveanon2013/02/01 07:08 PM
                                Article Online: Microservers must Specialize to SurviveDoug S2013/02/02 02:38 PM
                                  Article Online: Microservers must Specialize to SurviveRicardo B2013/02/02 03:03 PM
              Article Online: Microservers must Specialize to Survivebakaneko2013/01/30 01:16 AM
        Article Online: Microservers must Specialize to Surviveanon2013/01/29 11:34 PM
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      Article Online: Microservers must Specialize to SurviveMichael S2013/01/29 09:42 AM
      Article Online: Microservers must Specialize to SurviveMark Roulo2013/01/29 06:08 PM
        Article Online: Microservers must Specialize to Surviverwessel2013/01/29 10:15 PM
          Article Online: Microservers must Specialize to SurviveRichard Cownie2013/01/30 02:39 PM
            Article Online: Microservers must Specialize to Surviverwessel2013/01/30 03:54 PM
          Or compare to *desktop* ASPsMark Roulo2013/01/30 03:51 PM
            Or compare to *desktop* ASPsrwessel2013/01/30 04:07 PM
            Or compare to *desktop* ASPsCeleron2013/01/30 05:49 PM
            Or compare to *desktop* ASPsDoug S2013/01/30 09:50 PM
              Or compare to *desktop* ASPsrwessel2013/01/30 11:04 PM
              when thoughput matters, ultra-cheap Intel CPUs are not attractiveMichael S2013/01/31 02:59 AM
                when thoughput matters, ultra-cheap Intel CPUs are not attractiveDoug S2013/01/31 12:00 PM
                  when thoughput matters, ultra-cheap Intel CPUs are not attractiveMichael S2013/01/31 02:04 PM
                    Price/perf curve on intel.Jouni Osmala2013/01/31 11:28 PM
                    when thoughput matters, ultra-cheap Intel CPUs are not attractiveDoug S2013/02/01 04:45 PM
                      when thoughput matters, ultra-cheap Intel CPUs are not attractiverwessel2013/02/02 01:54 AM
              Or compare to *desktop* ASPsGabriele Svelto2013/01/31 03:33 AM
    Article Online: Microservers must Specialize to SurviveDoug S2013/01/29 10:36 AM
      Article Online: Microservers must Specialize to SurviveDavid Kanter2013/01/29 01:52 PM
        Article Online: Microservers must Specialize to SurviveARMandLeg2013/01/29 03:31 PM
        Article Online: Microservers must Specialize to SurviveNo2013/01/29 03:32 PM
          Article Online: Microservers must Specialize to SurviveMichael S2013/01/29 04:36 PM
            Article Online: Microservers must Specialize to SurviveDoug S2013/01/29 07:25 PM
        Article Online: Microservers must Specialize to SurviveDoug S2013/01/29 07:20 PM
          Article Online: Microservers must Specialize to SurviveEduardoS2013/01/30 03:48 AM
  Article Online: Microservers must Specialize to SurvivePer Hesselgren2013/01/29 09:08 AM
  Article Online: Microservers must Specialize to Survivecarop2013/01/29 02:55 PM
    Article Online: Microservers must Specialize to SurviveDavid Kanter2013/01/29 11:33 PM
      Article Online: Microservers must Specialize to SurviveGabriele Svelto2013/01/31 03:51 AM
    Article Online: Microservers must Specialize to Survivebakaneko2013/01/30 01:32 AM
      Cache capacity benefits (babbling a bit)Paul A. Clayton2013/01/30 01:42 PM
        Cache size experiments may have been done on ARMsMark Roulo2013/01/30 02:14 PM
          Way and line locking and associativityPaul A. Clayton2013/01/30 03:08 PM
            Way and line locking and associativityMark Roulo2013/01/30 03:37 PM
        Cache capacity benefits may have been done in simulationPatrick Chase2013/01/30 07:25 PM
          Simulation has benefits but is SLOWPaul A. Clayton2013/01/30 09:08 PM
            Simulation has benefits but is SLOWPatrick Chase2013/01/30 10:36 PM
              Simulation has benefits but is SLOWRichard Cownie2013/02/01 12:32 PM
                Simulation has benefits but is SLOWPatrick Chase2013/02/01 01:06 PM
                Simulation has benefits but is SLOWnone2013/02/01 01:13 PM
      Article Online: Microservers must Specialize to Survivesoupdragon2013/01/31 12:02 PM
    Article Online: Microservers must Specialize to SurvivePatrick Chase2013/01/30 12:26 PM
  4x or 10x advantageS. Rao2013/01/30 05:35 PM
    4x or 10x advantagerwessel2013/01/30 06:32 PM
      4x or 10x advantageS. Rao2013/02/03 10:32 PM
        4x or 10x advantageDavid Kanter2013/02/03 11:09 PM
        4x or 10x advantagerwessel2013/02/04 12:08 AM
          x86_64Richard Cownie2013/02/04 05:52 PM
            x86_64Michael S2013/02/05 02:51 AM
              x86_64Richard Cownie2013/02/05 04:33 AM
                x86_64EduardoS2013/02/05 04:41 AM
                  x86_64sJ2013/02/05 05:52 AM
                  x86_64Richard Cownie2013/02/05 06:47 AM
                x86_64someone2013/02/05 09:22 AM
                  x86_64Richard Cownie2013/02/05 09:44 AM
              "Just recompile"Mark Roulo2013/02/05 08:40 AM
                "Just recompile"Michael S2013/02/05 10:35 AM
                  "Just recompile"Mark Roulo2013/02/05 10:55 AM
  Virtualization and custom interconnectsGabriele Svelto2013/01/31 05:05 AM
  x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/01 10:11 PM
    x86 penalty depends on performance and microarchitecturempx2013/02/02 04:31 AM
      x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/02 09:27 AM
        Heterogenous multicore in serversPaul A. Clayton2013/02/02 10:25 AM
    x86 penalty depends on performance and microarchitectureanon2013/02/02 05:04 AM
      x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/02 09:42 AM
        x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/02 09:58 AM
        x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/02 10:26 AM
        x86 penalty depends on performance and microarchitectureanon2013/02/02 05:49 PM
          x86 penalty depends on performance and microarchitecturePer Hesselgren2013/02/03 01:44 AM
            x86 penalty depends on performance and microarchitectureMichael S2013/02/03 02:59 AM
          x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/03 02:27 PM
            x86 penalty depends on performance and microarchitectureanon2013/02/03 02:58 PM
              x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/03 03:35 PM
                x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/03 03:39 PM
                x86 penalty depends on performance and microarchitectureanon2013/02/03 06:08 PM
                  x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/03 08:05 PM
                    x86 penalty depends on performance and microarchitectureanon2013/02/03 09:52 PM
                      x86 penalty depends on performance and microarchitectureDavid Kanter2013/02/03 11:23 PM
                        U shape curve on performance...Jouni Osmala2013/02/04 01:07 AM
                          U shape curve on performance...none2013/02/04 03:03 AM
                            U shape curve on performance...Michael S2013/02/04 07:55 AM
                              U shape curve on performance...Patrick Chase2013/02/04 10:14 AM
                                U shape curve on performance...Michael S2013/02/04 02:43 PM
                                  U shape curve on performance...Patrick Chase2013/02/04 04:06 PM
                            Microcode can be usefulPaul A. Clayton2013/02/04 08:08 AM
                          U shape curve on performance...Michael S2013/02/04 07:48 AM
                          U shape curve on performance...Patrick Chase2013/02/04 10:05 AM
                            It only works if ... ??Paul A. Clayton2013/02/04 12:20 PM
                              It only works if ... ??Patrick Chase2013/02/04 12:48 PM
                                It only works if ... ??Patrick Chase2013/02/04 01:02 PM
                                It only works if ... ??Patrick Chase2013/02/04 01:08 PM
                                  It only works if ... ??Patrick Chase2013/02/04 01:15 PM
                                  It only works if ... ??anon2013/02/04 05:45 PM
                            I don't follow...Megol2013/02/05 10:16 AM
                      x86 penalty depends on performance and microarchitecturerwessel2013/02/04 12:28 AM
            spec95 vs Spec2kMichael S2013/02/04 02:27 AM
              spec95 vs Spec2kPer Hesselgren2013/02/04 04:42 AM
              spec95 vs Spec2kbakaneko2013/02/04 04:48 AM
                correct linksMichael S2013/02/04 06:10 AM
              spec95 vs Spec2kPatrick Chase2013/02/04 11:47 AM
                spec95 vs Spec2kPatrick Chase2013/02/04 11:55 AM
                  spec95 vs Spec2kMichael S2013/02/04 01:39 PM
                    spec95 vs Spec2kPatrick Chase2013/02/04 02:07 PM
                    spec95 vs Spec2knone2013/02/04 04:28 PM
                      spec95 vs Spec2kMichael S2013/02/05 02:35 AM
                spec95 vs Spec2kMichael S2013/02/04 01:50 PM
                spec95 vs Spec2k (hair-splitting)Kira2013/02/04 03:26 PM
    x86 penalty depends on performance and microarchitecturenone2013/02/02 05:33 AM
      x86 penalty depends on performance and microarchitecturePatrick Chase2013/02/02 10:11 AM
        x86 penalty depends on performance and microarchitecturenone2013/02/02 10:43 AM
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            Cortex A9 ROBPatrick Chase2013/02/02 02:01 PM
              Cortex A9 ROBnone2013/02/04 04:12 PM
                Cortex A9 ROBPatrick Chase2013/02/04 04:43 PM
                  Cortex A9 ROBnone2013/02/04 04:58 PM
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      ARM diversity might be an advantagePatrick Chase2013/02/03 04:29 PM
        ARMv8 cleanlinessanon2013/02/03 06:11 PM
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            Does AArch64 not support table node page sizes?Paul A. Clayton2013/02/03 09:40 PM
              Does AArch64 not support table node page sizes?Patrick Chase2013/02/03 10:14 PM
                Does AArch64 not support table node page sizes?none2013/02/04 02:55 AM
              LPAE supports 2MiB and 1 GiB blocksPaul A. Clayton2013/02/03 10:52 PM
            ARMv8 cleanlinessanon2013/02/03 10:06 PM
              ARMv8 cleanlinessrwessel2013/02/04 12:37 AM
                ARMv8 cleanlinessMichael S2013/02/04 01:50 AM
              ARMv8 cleanlinessEtienne2013/02/04 08:01 AM
                Similar to Thumb If-Then instructionPaul A. Clayton2013/02/04 08:43 AM
                  Similar to Thumb If-Then instructionEtienne2013/02/05 07:22 AM
                ARMv8 cleanlinessJouni Osmala2013/02/04 11:15 PM
                  ARMv8 cleanlinessEtienne2013/02/05 06:57 AM
                    ARMv8 cleanlinessJouni Osmala2013/02/05 07:59 AM
                      ARMv8 cleanlinessEtienne2013/02/05 08:55 AM
              ARMv8 cleanlinessMaynard Handley2013/02/13 03:53 PM
                ARMv8 cleanlinessGabriele Svelto2013/02/14 01:37 AM
                ARMv8 cleanlinessEtienne2013/02/14 06:00 AM
                  ARMv8 cleanlinessrwessel2013/02/14 04:03 PM
                ARMv8 cleanlinessSeni2013/02/14 07:45 AM
                  ARMv8 cleanlinessrwessel2013/02/14 04:14 PM
                    ARMv8 cleanlinessLinus Torvalds2013/02/14 04:44 PM
                      ARMv8 cleanlinessGabriele Svelto2013/02/15 02:28 AM
                        ARMv8 cleanlinessEduardoS2013/02/15 10:45 AM
                        ARMv8 cleanlinessMax2013/02/15 01:24 PM
                          ARMv8 cleanlinessWilco2013/02/15 05:46 PM
                            ARMv8 cleanlinessLinus Torvalds2013/02/15 06:34 PM
                              ARMv8 cleanlinessWilco2013/02/17 01:47 PM
                                ARMv8 cleanlinessLinus Torvalds2013/02/17 04:08 PM
                                  ARMv8 cleanlinessWilco2013/02/18 05:14 PM
                                    ARMv8 cleanlinessanon2013/02/19 01:56 AM
                                      ARMv8 cleanlinessWilco2013/02/19 02:20 PM
                                    ARMv8 cleanlinessLinus Torvalds2013/02/19 10:13 AM
                                      ARMv8 cleanlinessWilco2013/02/19 02:10 PM
                                        ARMv8 cleanlinessLinus Torvalds2013/02/19 06:16 PM
                                          ARMv8 cleanlinessLinus Torvalds2013/02/19 06:41 PM
                                            ARMv8 cleanlinessWilco2013/02/25 06:05 AM
                                              ARMv8 cleanlinessLinus Torvalds2013/02/25 06:22 PM
                                                ARMv8 cleanlinessnone2013/02/26 01:31 AM
                                                  ARMv8 cleanlinessMichael S2013/02/26 05:05 AM
                                                ARMv8 cleanlinessDavid Hess2013/02/26 11:01 PM
                                                  ARMv8 cleanlinessLinus Torvalds2013/02/27 11:22 AM
                                                    ARMv8 cleanlinessDavid Hess2013/03/01 01:58 PM
                                                      What is wrong with ARM?Paul A. Clayton2013/03/01 06:56 PM
                                                        What is wrong with ARM?David Hess2013/03/01 07:49 PM
                                                          What is wrong with ARM?Michael S2013/03/02 05:11 PM
                                                            What is wrong with ARM?David Hess2013/03/03 11:32 PM
                                                              What is wrong with ARM?Michael S2013/03/04 02:05 AM
                                                        What is wrong with ARM?David Hess2013/03/07 06:30 PM
                                                          Thank you very much!Paul A. Clayton2013/03/07 07:59 PM
                                                            Thank you very much!David Hess2013/03/07 11:22 PM
                                                              Thank you very much!gallier22013/03/08 01:43 AM
                                                                Thank you very much!David Hess2013/03/08 11:24 AM
                                                                  Thank you very much!Ungo2013/03/08 04:37 PM
                                                                    Thank you very much!David Hess2013/03/08 08:47 PM
                                                            Thank you very much!Ricardo B2013/03/08 05:07 AM
                                                              ARM lackings a historical accident?Paul A. Clayton2013/03/08 08:54 AM
                                                                ARM lackings a historical accident?Ricardo B2013/03/08 03:33 PM
                                                          What is wrong with ARM?Michael S2013/03/08 06:25 AM
                                                            What is wrong with ARM?David Hess2013/03/08 12:37 PM
                                                            What is wrong with ARM?dmsc2013/03/12 03:47 PM
                                                          What is wrong with ARM?dmsc2013/03/12 03:43 PM
                                                      ARMv8 cleanlinessMichael S2013/03/02 05:06 PM
                                                    ParityAndi Kleen2013/03/03 01:47 PM
                                                      ParityLinus Torvalds2013/03/03 03:06 PM
                                                        ParityAndi Kleen2013/03/03 07:15 PM
                                            Except the borrow bitMatthew D2013/02/26 12:07 AM
                                              Except the borrow bitrwessel2013/02/26 12:42 AM
                                              Except the borrow bitLinus Torvalds2013/02/26 11:13 AM
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                                                  are ZSCO flags really fundamental?Linus Torvalds2013/02/27 05:41 PM
                                                    are ZSCO flags really fundamental?Michael S2013/02/28 01:39 AM
                                                    are ZSCO flags really fundamental?2013/03/01 10:23 AM
                                                  are ZSCO flags really fundamental?EduardoS2013/02/27 11:07 PM
                                                    are ZSCO flags really fundamental?Michael S2013/02/28 04:58 AM
                                                  are ZSCO flags really fundamental?rwessel2013/02/28 12:29 AM
                                                    are ZSCO flags really fundamental?rwessel2013/02/28 12:32 AM
                                                    Bit numbering on big endian machinesKonrad Schwarz2013/02/28 01:49 AM
                                                      Bit numbering on big endian machinesrwessel2013/02/28 02:32 AM
                                          ARMv8 cleanlinessWilco2013/02/25 05:54 AM
                                            ARMv8 cleanlinessEduardoS2013/02/25 06:24 AM
                                              ARMv8 cleanlinessWilco2013/02/25 07:36 AM
                                                ARMv8 cleanlinessEduardoS2013/02/25 01:06 PM
                                                  ARMv8 cleanlinessWilco2013/02/25 05:24 PM
                                                    ARMv8 cleanlinessEduardoS2013/02/25 05:55 PM
                                                    Utility of data loss exceptionsPaul A. Clayton2013/02/25 08:18 PM
                                                      Utility of data loss exceptionsrwessel2013/02/26 01:00 AM
                                                        Excessively expensive mode changingPaul A. Clayton2013/02/26 06:15 AM
                                                      Utility of data loss exceptionsEduardoS2013/02/26 02:55 AM
                                                        Utility of data loss exceptionsTREZA2013/02/26 04:53 AM
                                                          Utility of data loss exceptionsEduardoS2013/02/26 05:37 AM
                                                      Utility of data loss exceptionsEtienne2013/02/26 06:01 AM
                                            1b vs. 4b not a huge difference?Paul A. Clayton2013/02/25 09:57 AM
                                  Possible benefit of multi-bit CCPaul A. Clayton2013/02/23 08:09 AM
                                ARMv8 cleanlinessrwessel2013/02/18 12:01 AM
                                  ARMv8 cleanlinessWilco2013/02/18 05:33 PM
                                    ARMv8 cleanlinessEduardoS2013/02/18 08:18 PM
                                      ARMv8 cleanlinessWilco2013/02/25 06:19 AM
                      ARMv8 cleanlinessTREZA2013/02/15 04:21 AM
                      ARMv8 cleanliness2013/02/17 10:49 AM
                        ARMv8 cleanlinessLinus Torvalds2013/02/17 11:54 AM
                          ARMv8 cleanlinessLinus Torvalds2013/02/17 11:58 AM
                          ARMv8 cleanlinessnone2013/02/17 04:36 PM
                        ARMv8 cleanlinessTREZA2013/02/17 11:59 AM
                          ARMv8 cleanlinessWilco2013/02/17 12:30 PM
                            and-compare and or-comparePaul A. Clayton2013/02/17 05:28 PM
                              early branch resolutionanon2013/02/18 02:05 AM
                                My ignorance about compilers is vasterPaul A. Clayton2013/02/18 01:30 PM
                                early branch resolutionanon2013/02/18 05:12 PM
                              early branch resolution?EBFE2013/02/19 01:03 AM
                                Early resolution: some but limited potentialPaul A. Clayton2013/02/19 05:52 PM
                                  Early resolution: some but limited potentialhobold2013/02/20 02:02 PM
                                    PPC750 was an inspirationPaul A. Clayton2013/02/23 08:09 AM
                          ARMv8 cleanlinessTREZA2013/02/17 01:53 PM
                            ARMv8 cleanlinessExophase2013/02/17 04:49 PM
                        ARMv8 cleanlinessWilco2013/02/17 12:07 PM
                        ARMv8 cleanlinessbakaneko2013/02/17 12:43 PM
                        ARMv8 cleanlinessJouni Osmala2013/02/17 01:10 PM
                          -1 comparison true seems betterPaul A. Clayton2013/02/17 06:07 PM
                  ARMv8 cleanlinessEtienne2013/07/17 02:58 AM
      ARM server benchmark- why Apache?Per Hesselgren2013/02/05 12:13 AM
        ARM server benchmark- why Apache?anon2013/02/05 12:38 AM
          ARM server benchmark- why Apache?Per Hesselgren2013/02/05 01:25 AM
            ARM server benchmark- why Apache?Michael S2013/02/05 02:13 AM
          ARM server benchmark- why Apache?Michael S2013/02/05 01:51 AM
          I think that was debunked alreadyDavid Kanter2013/02/05 07:36 PM
        ARM server benchmark- why Apache?bakaneko2013/02/06 02:37 AM
          ARM server benchmark- why Apache?Michael S2013/02/06 03:43 AM
            Marketing to PHBs?Paul A. Clayton2013/02/06 06:40 AM
            ARM server benchmark- why Apache?bakaneko2013/02/06 07:08 AM
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