Knights Landing L/S bandwidth

Article: Knights Landing Details
By: NoSpammer (no.delete@this.spam.com), January 7, 2014 2:58 am
Room: Moderated Discussions
Nicolas Capens (nicolas.capens.delete@this.gmail.com) on January 6, 2014 9:15 pm wrote:
> How does that not apply to Knights Landing? And by the way that 1 byte/FLOP is the GPU's cache
> bandwidth. Kepler is even limited to 0.33 bytes/FLOP. That's not because there's too little bandwidth,
> but rather an 'excess' of FLOPS. They're there to burst process arithmetic heavy portions of code.
> Kind of like beating Amdahl's Law by going even wider, because it's so damn cheap. Knights Landing
> won't be any different. I don't think having 2 bytes/FLOP is going to make it capable of sustaining
> a higher peak performance than 1 byte/FLOP, for the same power envelope.

Have you looked at the actual microarchitectures? If you have you might have noticed that the GPU register files are the size of KNL L1 or larger. Essentialy, KNL register file is L0 compared to GPU register files. So if you compare bandwidth to GPUs you must be careful to look at comparable intersection in cache hierarchy. Going up a level, the GPU L1+local memory+shared memory are very small compared to proposed KNL L2, and KNL will offer far bigger L2/FPU.

> NVIDIA and ATI have been designing throughput architectures for ages. You think Intel can swoop in with a "superior
> cache hierarchy" to bend the laws of computing and physics? Intel's best hope for Knights Landing is to keep
> x86 relevant in the HPC market. Their process technology might give them an advantage, as well as the reasonable
> single-threaded scalar performance, but if providing more cache bandwidth was the key to success you'd expect
> NVIDIA and ATI to put more focus on that. By the way, their cache hierarchies are substantially different, but
> neither is taking a a big overall lead over the other. So I wouldn't expect a third player to suddenly beat
> them on all fronts by providing a higher L1 bandwidth than what is typically necessary.

While I do believe NVIDIA and ATI do have accumulated experience in optimizing graphics worksets that Intel cannot match I also do believe what I have written. More bandwidth cannot hurt. The key to overall performance has always been removing bottlenecks. I expect GPUs to keep throwing more FPUs at the problem and Intel to try to squeeze better performance from mm2 of silicon.

> To recap: a huge L1 bandwidth of one load operation per arithmetic instruction doesn't help
> if L2 can't sustain it. You're either accessing the same data multiple times, in which case
> an L0 cache would be more power efficient, or you're accessing lots of unique data, in which
> case you're L2 bandwidth limited and a second L1 read port doesn't help. Cases in between are
> rare, and due to other things that cause the IPC to dip below 2, I believe having two L1 load
> ports doesn't make that much of a difference and may not outweigh the power and area cost.

In reality there are lots of codes inbetween where work can be blocked to maximize usage of both L1 and L2 bandwidth.
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TopicPosted ByDate
Knights Landing details (new article)David Kanter2014/01/02 11:58 PM
  eDRAM as cacheiz2014/01/03 03:39 AM
    eDRAM optionsEric Bron2014/01/09 02:45 AM
  Knights Landing details (new article)Emil Briggs2014/01/03 05:06 AM
  Knights Landing details (new article)Michael S2014/01/03 06:05 AM
    PCI-E and QPIDavid Kanter2014/01/03 11:11 AM
  eDRAM still seems too expensive ...Mark Roulo2014/01/03 09:48 AM
    Nevermind ... I see that you addressed this :-)Mark Roulo2014/01/03 09:51 AM
    eDRAM still seems too expensive ...Eric Bron2014/01/03 12:42 PM
  eDRAM or stacked DRAM?Patrick Chase2014/01/03 10:21 AM
    eDRAM or stacked DRAM?Wes Felter2014/01/03 02:00 PM
      eDRAM or stacked DRAM?Patrick Chase2014/01/03 06:26 PM
        eDRAM or stacked DRAM?tarlinian2014/06/23 08:59 PM
          eDRAM or stacked DRAM?Maynard Handley2014/06/24 12:47 AM
            eDRAM or stacked DRAM?Michael S2014/06/24 02:13 AM
            eDRAM or stacked DRAM?David Kanter2014/06/24 11:09 AM
              eDRAM or stacked DRAM?anon2014/06/24 06:50 PM
                eDRAM or stacked DRAM?Eric Bron2014/06/24 09:02 PM
                  eDRAM or stacked DRAM?anon2014/06/24 09:39 PM
                eDRAM or stacked DRAM?Michael S2014/06/25 12:46 AM
              eDRAM or stacked DRAM?Michael S2014/06/25 12:29 AM
          eDRAM or stacked DRAM?Eric Bron2014/06/24 04:37 AM
            eDRAM or stacked DRAM?tarlinian2014/06/24 07:53 AM
              eDRAM or stacked DRAM?Eric Bron2014/06/24 08:09 AM
                eDRAM or stacked DRAM?tarlinian2014/06/24 08:40 AM
                  eDRAM or stacked DRAM?Eric Bron2014/06/24 09:10 AM
                    eDRAM or stacked DRAM?Eric Bron2014/06/24 09:12 AM
          eDRAM or stacked DRAM?Wes Felter2014/06/24 09:09 PM
            eDRAM or stacked DRAM?Michael S2014/06/25 01:02 AM
  Why not tag-inclusive L3?Paul A. Clayton2014/01/03 03:28 PM
    Why not tag-inclusive L3?Eric Bron2014/01/04 02:22 AM
  Knights Landing L/S bandwidthNicolas Capens2014/01/04 04:43 AM
    Knights Landing L/S bandwidthEric Bron2014/01/04 05:20 AM
      Knights Landing L/S bandwidthNicolas Capens2014/01/04 01:55 PM
        Knights Landing L/S bandwidthEric Bron2014/01/04 02:27 PM
          Knights Landing L/S bandwidthhobold2014/01/04 03:23 PM
            Knights Landing L/S bandwidthEric Bron2014/01/04 04:20 PM
              Knights Landing L/S bandwidthMichael S2014/01/05 02:42 AM
                Knights Landing L/S bandwidthEric Bron2014/01/05 02:49 AM
                  Knights Landing L/S bandwidthPatrick Chase2014/01/11 07:13 PM
                    Knights Landing L/S bandwidthNicolas Capens2014/01/13 07:39 PM
                Knights Landing L/S bandwidthNicolas Capens2014/01/05 02:18 PM
                  Knights Landing L/S bandwidthMichael S2014/01/06 03:09 AM
                    Knights Landing L/S bandwidthEric Bron2014/01/06 04:11 AM
                      Knights Landing L/S bandwidthMichael S2014/01/06 04:40 AM
                        Knights Landing L/S bandwidthEric Bron2014/01/06 04:54 AM
                        Knights Landing L/S bandwidthEric Bron2014/01/08 08:00 AM
                    Knights Landing L/S bandwidthNicolas Capens2014/01/07 02:31 PM
                      Knights Landing L/S bandwidthMichael S2014/01/07 03:17 PM
                        Knights Landing L/S bandwidthNicolas Capens2014/01/07 08:55 PM
                          Knights Landing L/S bandwidthMichael S2014/01/08 12:42 AM
                            Knights Landing L/S bandwidthGabriele Svelto2014/01/08 07:30 AM
                              Occam's razorNicolas Capens2014/01/08 01:33 PM
                                Occam's razorGabriele Svelto2014/01/08 01:51 PM
                                  Occam's razorEric Bron2014/01/08 02:28 PM
                                    Occam's razorbakaneko2014/01/09 03:45 AM
                                      Occam's razoranon2014/01/09 04:02 AM
                                        Occam's razorbakaneko2014/01/09 05:24 AM
                                          Occam's razorbakaneko2014/01/09 05:51 AM
                                            Occam's razoranon2014/01/09 06:18 AM
                                          Occam's razoranon2014/01/09 06:16 AM
                                            Occam's razorbakaneko2014/01/09 07:43 AM
                                              Occam's razoranon2014/01/09 08:17 AM
                                                Occam's razorbakaneko2014/01/09 10:12 AM
                                                  Occam's razorEric Bron2014/01/09 10:18 AM
                                                    Occam's razorbakaneko2014/01/09 10:58 AM
                                                  Occam's razoranon2014/01/09 11:35 AM
                                                    Occam's razorbakaneko2014/01/12 09:48 AM
                                                  99.9% not a new extensionNicolas Capens2014/01/10 10:39 AM
                                                    Compiler complexityGabriele Svelto2014/01/11 02:58 AM
                                                      Compiler complexityNicolas Capens2014/01/11 12:20 PM
                                                        Compiler complexityGabriele Svelto2014/01/11 02:17 PM
                                                          Patent pendingNicolas Capens2014/01/14 06:21 PM
                                                    99.9% not a new extensionbakaneko2014/01/12 10:08 AM
                                  L0 data cacheEric Bron2014/01/08 03:52 PM
                                  Occam's razorDavid Kanter2014/01/08 03:53 PM
                                    Occam's razorNicolas Capens2014/01/09 02:07 AM
                                      Occam's razorRicardo B2014/01/09 04:21 AM
                                        Virtually indexed, untaggedNicolas Capens2014/01/10 10:27 AM
                                          Virtually indexed, untaggedGabriele Svelto2014/01/11 03:08 AM
                                            Virtually indexed, untaggedNicolas Capens2014/01/11 08:45 PM
                                              Virtually indexed, untaggedDavid Kanter2014/01/12 01:13 AM
                                                Virtually indexed, untaggedanon2014/01/12 03:02 AM
                                                Virtually indexed, untaggedNicolas Capens2014/01/16 08:55 AM
                                              Virtually indexed, untaggedMichael S2014/01/12 03:09 AM
                                                Virtually indexed, untaggedNicolas Capens2014/01/16 09:47 AM
                                      Occam's razorDavid Kanter2014/01/09 05:42 PM
                                        Occam's razorNicolas Capens2014/01/10 01:22 PM
                                          Occam's razorDavid Kanter2014/01/10 03:06 PM
                                            MEM : ALU ratioNicolas Capens2014/01/10 11:24 PM
                                              MEM : ALU ratioGabriele Svelto2014/01/11 02:47 AM
                                                MEM : ALU ratioEric Bron2014/01/11 03:41 AM
                                                  MEM : ALU ratioEric Bron2014/01/11 04:06 AM
                                                    MEM : ALU ratioDavid Kanter2014/01/11 07:28 PM
                                                      MEM : ALU ratioEric Bron nli2014/01/12 01:54 AM
                                                  MEM : ALU ratioGabriele Svelto2014/01/11 09:15 AM
                                                MEM : ALU ratioNicolas Capens2014/01/14 05:56 PM
                                                  Etiquette in linking to papersPaul A. Clayton2014/01/14 06:44 PM
                                                  MEM : ALU ratioanon2014/01/14 07:32 PM
                                                    L0 power costNicolas Capens2014/01/16 01:05 PM
                                                      L0 power costanon2014/01/16 09:01 PM
                                                        L0 power costNicolas Capens2014/01/18 11:30 PM
                                                          Links revealedPaul A. Clayton2014/01/19 03:47 PM
                                                          L0 power costanon2014/01/20 12:19 AM
                                                            L0 power costNicolas Capens2014/01/20 01:49 PM
                                                              L0 power costanon2014/01/21 12:18 AM
                                                                Q.E.D.Nicolas Capens2014/01/21 07:44 PM
                                                                  Q.E.D.anon2014/01/21 08:24 PM
                                                                    Straw manNicolas Capens2014/01/23 10:56 PM
                                                                      Straw mananon2014/01/25 05:46 AM
                                                                        Still waiting for an explanationNicolas Capens2014/01/25 11:19 PM
                                                                          Still waiting for an explanationExophase2014/01/26 12:13 PM
                                                                            Still waiting for an explanationbakaneko2014/01/26 10:52 PM
                                                                  Q.E.D.Ricardo B2014/01/22 05:58 PM
                                                                    Q.E.D.Michael S2014/01/23 03:59 AM
                                                                      L0 entry countNicolas Capens2014/01/24 12:11 AM
                                                                        L0 entry countEric Bron2014/01/24 01:08 AM
                                                                          L0 entry countMichael S2014/01/24 05:18 AM
                                                                            L0 entry countEric Bron2014/01/24 06:15 AM
                                                                              L0 entry countMichael S2014/01/24 07:10 AM
                                                                                L0 entry countEric Bron2014/01/24 07:20 AM
                                                                          L0 entry countNicolas Capens2014/01/24 01:33 PM
                                                                            L0 entry countEric Bron2014/01/24 02:20 PM
                                                                              L0 entry count and L1 read port orthogonalityNicolas Capens2014/01/26 12:14 AM
                                                                                L0 entry count and L1 read port orthogonalityEric Bron2014/01/26 02:49 AM
                                                                    L0 hit rateNicolas Capens2014/01/23 11:49 PM
                                                                      L0 hit rateRicardo B2014/01/24 05:42 AM
                                                                        L0 hit rateExophase2014/01/24 12:37 PM
                                                                          L0 hit rateEric Bron2014/01/24 01:12 PM
                                                                        L0 vs RF powerNicolas Capens2014/01/24 01:43 PM
                                              MEM : ALU ratioDavid Kanter2014/01/11 12:47 PM
                                                MEM : ALU ratioNicolas Capens2014/01/16 08:23 AM
                                                  MEM : ALU ratioStubabe2014/01/17 11:58 AM
                                                    MEM : ALU ratioStubabe2014/01/17 12:42 PM
                                                      MEM : ALU ratioMichael S2014/01/18 03:57 PM
                                                        MEM : ALU ratiobakaneko2014/01/18 11:47 PM
                                                    MEM : ALU ratioNicolas Capens2014/01/20 02:48 PM
                                                      It's called "tunnel vision" (NT)iz2014/01/20 03:36 PM
                                                      MEM : ALU ratioMichael S2014/01/20 03:37 PM
                                                        MEM : ALU ratioStubabe2014/01/21 03:54 PM
                                                        MEM : ALU ratioNicolas Capens2014/01/21 09:07 PM
                                                          MEM : ALU ratioMichael S2014/01/22 07:17 AM
                                                            MEM : ALU ratioNicolas Capens2014/01/24 02:33 PM
                                                      MEM : ALU ratioStubabe2014/01/21 03:32 PM
                                                        MEM : ALU ratioMichael S2014/01/22 07:56 AM
                                                          MEM : ALU ratioStubabe2014/01/23 08:06 AM
                                                            MEM : ALU ratioEric Bron2014/01/23 08:45 AM
                                                              editEric Bron2014/01/23 08:49 AM
                                                            MEM : ALU ratioMichael S2014/01/23 08:58 AM
                                                              MEM : ALU ratioEric Bron2014/01/23 09:29 AM
                                                                MEM : ALU ratioMichael S2014/01/23 09:33 AM
                                                              MEM : ALU ratioStubabe2014/01/24 03:50 AM
                                                MEM : ALU ratiobakaneko2014/01/23 09:36 AM
                                              MEM : ALU ratioNoSpammer2014/01/11 02:39 PM
                                                L1 vs L0 access costNicolas Capens2014/01/16 02:17 PM
                                                  L1 vs L0 access costNoSpammer2014/01/19 12:48 PM
                                                    L1 vs L0 access costdmcq2014/01/22 04:45 AM
                                                      L1 vs L0 access costGabriele Svelto2014/01/22 06:29 AM
                                                        L1 vs L0 access costdmcq2014/01/22 12:33 PM
                                                          L1 vs L0 access costGabriele Svelto2014/01/22 03:33 PM
                                                            L1 vs L0 access costdmcq2014/01/24 03:19 AM
                                                    L1 vs L0 access costNicolas Capens2014/01/24 01:16 AM
                                      Occam's razorPatrick Chase2014/01/13 10:19 AM
                                  Occam's razorNicolas Capens2014/01/08 11:40 PM
                                    Occam's razorGabriele Svelto2014/01/09 01:41 AM
                                      Occam's razorEric Bron2014/01/09 01:54 AM
                                        Occam's razorGabriele Svelto2014/01/09 05:35 AM
                                          Occam's razorEric Bron2014/01/09 06:14 AM
                                            avoiding redundant loadsEric Bron2014/01/09 06:18 AM
                                            AVX2 versionEric Bron2014/01/09 06:32 AM
                                      Occam's razorAmiba Gelos2014/01/09 02:01 AM
                                        Occam's razorEric Bron2014/01/09 02:06 AM
                                          Occam's razorAmiba Gelos2014/01/09 02:43 AM
                                            Occam's razorEric Bron2014/01/09 03:02 AM
                                        L0 access latencyNicolas Capens2014/01/09 03:27 AM
                                          L0 access latencyAmiba Gelos2014/01/09 04:16 AM
                                            compared to L0$ i would say banking is far more likely (NT)Amiba Gelos2014/01/09 04:20 AM
                                            L0 access latencyNicolas Capens2014/01/10 02:20 PM
                                      Occam's razorNicolas Capens2014/01/09 03:19 AM
                                    Occam's razorNoSpammer2014/01/09 11:55 AM
                                      Occam's razorNicolas Capens2014/01/10 02:40 PM
                                        Occam's razorMichael S2014/01/11 09:21 AM
                                        Occam's razorMichael S2014/01/12 02:21 PM
                                          KNC compiler outputNicolas Capens2014/01/16 05:39 PM
                                            KNC compiler outputMichael S2014/01/18 04:13 PM
                                    L0 cache coherencyDavid Kanter2014/01/11 07:39 PM
                                Occam's razoranon2014/01/09 04:12 AM
                            Knights Landing L/S bandwidthEric Bron2014/01/08 09:46 AM
                              Knights Landing L/S bandwidthMichael S2014/01/08 10:23 AM
                            Knights Landing L/S bandwidthNicolas Capens2014/01/08 01:02 PM
                              Knights Landing L/S bandwidthMichael S2014/01/08 01:29 PM
                                Knights Landing L/S bandwidthEric Bron2014/01/08 01:54 PM
                                  Knights Landing L/S bandwidthMichael S2014/01/08 02:00 PM
                                    Knights Landing L/S bandwidthEric Bron2014/01/08 02:13 PM
                                      Knights Landing L/S bandwidthMichael S2014/01/08 02:28 PM
                                        Knights Landing L/S bandwidthEric Bron2014/01/08 02:32 PM
                                          Knights Landing L/S bandwidthMichael S2014/01/08 02:40 PM
                                            Knights Landing L/S bandwidthEric Bron2014/01/08 02:51 PM
                                              Knights Landing L/S bandwidthMichael S2014/01/09 11:18 AM
                          Knights Landing L/S bandwidthPatrick Chase2014/01/12 09:03 PM
                            Also page/line splits?David Kanter2014/01/12 09:50 PM
                              Also page/line splits?anon2014/01/13 12:44 AM
                                Also page/line splits?none2014/01/13 02:09 AM
                                  Also page/line splits?anon2014/01/13 03:19 AM
                            Knights Landing L/S bandwidthExophase2014/01/12 11:15 PM
                            Knights Landing L/S bandwidthanon2014/01/13 12:41 AM
                              Knights Landing L/S bandwidthPatrick Chase2014/01/13 10:14 AM
                            Aliased writesNicolas Capens2014/01/14 08:46 PM
                      Knights Landing L/S bandwidthRicardo B2014/01/07 03:27 PM
                        Knights Landing L/S bandwidthNicolas Capens2014/01/07 09:28 PM
                          Knights Landing L/S bandwidthRicardo B2014/01/08 01:13 AM
                            Knights Landing L/S bandwidthEric Bron2014/01/08 10:10 AM
                            Knights Landing L/S bandwidthNicolas Capens2014/01/08 02:31 PM
                              Knights Landing L/S bandwidthRicardo B2014/01/08 02:58 PM
                                Knights Landing L/S bandwidthG. Gouvine2014/01/09 08:10 AM
                                  Knights Landing L/S bandwidthRicardo B2014/01/09 10:19 AM
                                    Efficient load queue vs. efficient L0 cacheNicolas Capens2014/01/11 11:28 AM
                                      Efficient load queue vs. efficient L0 cacheG. Gouvine2014/01/13 01:11 AM
                                        Efficient load queue vs. efficient L0 cacheMichael S2014/01/13 02:43 AM
                                Register file read port requirementsNicolas Capens2014/01/10 11:55 PM
                                  Register file read port requirementsRicardo B2014/01/11 04:24 AM
                                    Register file read port requirementsEric Bron2014/01/11 04:32 AM
                                      Register file read port requirementsMichael S2014/01/11 08:57 AM
                                        Register file read port requirementsEric Bron2014/01/11 10:16 AM
                                          Register file read port requirementsMichael S2014/01/11 10:46 AM
                                            Register file read port requirementsEric Bron2014/01/11 11:12 AM
                                              Register file read port requirementsMichael S2014/01/11 11:36 AM
                                                Register file read port requirementsEric Bron2014/01/11 11:51 AM
                                              Register file read port requirementsPatrick Chase2014/01/13 01:27 PM
                                                Register file read port requirementsEric Bron2014/01/13 03:24 PM
                                                  Register file read port requirementsPatrick Chase2014/01/13 05:02 PM
                                                    Register file read port requirementsEric Bron2014/01/14 03:50 AM
                                                      Register file read port requirementsMichael S2014/01/14 10:36 AM
                                                        Register file read port requirementsEric Bron nli2014/01/14 12:04 PM
                                            Register file read port requirementsPatrick Chase2014/01/13 01:17 PM
                                              Register file read port requirementsMichael S2014/01/15 03:27 AM
                                        Register file read port requirementsEric Bron2014/01/11 10:28 AM
                                          Register file read port requirementsMichael S2014/01/11 11:07 AM
                                            Register file read port requirementsPatrick Chase2014/01/13 01:40 PM
                                          Register file read port requirementsPatrick Chase2014/01/13 01:34 PM
                                      Register file read port requirementsRicardo B2014/01/11 11:55 AM
                                        Register file read port requirementsEric Bron2014/01/11 12:17 PM
                                          Register file read port requirementsRicardo B2014/01/11 01:36 PM
                                            Register file read port requirementsEric Bron2014/01/11 01:42 PM
                                              Register file read port requirementsRicardo B2014/01/11 02:20 PM
                                                Register file read port requirementsEric Bron2014/01/11 02:26 PM
                                                  Register file read port requirementsMichael S2014/01/11 03:07 PM
                                                    Register file read port requirementsRicardo B2014/01/11 03:38 PM
                                                      Register file read port requirementsMichael S2014/01/11 03:49 PM
                                                Register file read port requirementsEric Bron2014/01/11 02:39 PM
                                                  Register file read port requirementsEric Bron2014/01/11 02:41 PM
                                                  Register file read port requirementsRicardo B2014/01/11 03:30 PM
                                    Register file read port requirementsNicolas Capens2014/01/11 11:09 AM
              Knights Landing L/S bandwidthanon2014/01/05 05:55 AM
                Knights Landing L/S bandwidthEric Bron2014/01/05 06:30 AM
                  Knights Landing L/S bandwidthanon2014/01/06 12:07 AM
                    Knights Landing L/S bandwidthEric Bron2014/01/06 01:38 AM
                      Knights Landing L/S bandwidthanon2014/01/06 03:01 AM
                        Knights Landing L/S bandwidthEric Bron2014/01/06 03:44 AM
                          Knights Landing L/S bandwidthanon2014/01/06 04:39 AM
                            Knights Landing L/S bandwidthEric Bron2014/01/06 05:00 AM
                              Knights Landing L/S bandwidthanon2014/01/06 05:44 AM
                                Knights Landing L/S bandwidthMichael S2014/01/06 07:54 AM
                                  Knights Landing L/S bandwidthEric Bron2014/01/06 09:11 AM
                                    Knights Landing L/S bandwidthMichael S2014/01/06 09:14 AM
                                      Knights Landing L/S bandwidthEric Bron2014/01/06 10:37 AM
                                        Knights Landing L/S bandwidthRicardo B2014/01/08 05:25 AM
                                          Knights Landing L/S bandwidthEric Bron2014/01/08 07:36 AM
                                            Knights Landing L/S bandwidthEric Bron2014/01/08 07:41 AM
                                            KNC code generator with EVEX back-end?Michael S2014/01/08 08:43 AM
                                              KNC code generator with EVEX back-end?Exophase2014/01/08 09:00 AM
                                                KNC code generator with EVEX back-end?Ricardo B2014/01/08 10:39 AM
                                                  KNC code generator with EVEX back-end?Eric Bron2014/01/08 11:15 AM
                                                    KNC code generator with EVEX back-end?Exophase2014/01/08 12:17 PM
                                                      KNC code generator with EVEX back-end?Ricardo B2014/01/08 01:06 PM
                                                        KNC code generator with EVEX back-end?Exophase2014/01/08 01:24 PM
                                                        KNC code generator with EVEX back-end?Eric Bron2014/01/08 01:38 PM
                                                    KNC code generator with EVEX back-end?Michael S2014/01/08 12:54 PM
                                              KNC code generator with EVEX back-end?Eric Bron2014/01/08 09:25 AM
                                              KNC code generator with EVEX back-end?Eric Bron2014/01/08 09:35 AM
                                                KNC code generator with EVEX back-end?Michael S2014/01/08 10:07 AM
                                                  KNC code generator with EVEX back-end?Eric Bron2014/01/08 10:24 AM
                                                    KNC code generator with EVEX back-end?Michael S2014/01/08 10:43 AM
                                                      KNC code generator with EVEX back-end?Eric Bron2014/01/08 12:23 PM
                                              KNC code generator with EVEX back-end?Eric Bron2014/01/08 09:43 AM
                                          AVX2 code much different than AVX-512Eric Bron2014/01/08 07:52 AM
                                            evil questionhobold2014/01/08 09:22 AM
                                              evil questionEric Bron2014/01/08 09:27 AM
                                                evil questionhobold2014/01/08 01:33 PM
                                                  evil questionMichael S2014/01/08 01:37 PM
                                                    stupid question (was: evil question)hobold2014/01/09 04:41 AM
                                                      stupid question (was: evil question)Eric Bron2014/01/09 04:52 AM
                                                        stupid question (was: evil question)Michael S2014/01/09 07:00 AM
                                                          stupid question (was: evil question)Michael S2014/01/09 07:12 AM
                                                            stupid question (was: evil question)Eric Bron2014/01/09 09:47 AM
                                                              stupid question (was: evil question)Michael S2014/01/09 10:48 AM
                                                                more decisive (hopefully) test caseMichael S2014/01/09 11:01 AM
                                                                  more decisive (hopefully) test caseEric Bron2014/01/09 11:08 AM
                                                                    more decisive (hopefully) test caseMichael S2014/01/09 11:24 AM
                                                                      more decisive (hopefully) test caseEric Bron2014/01/09 11:27 AM
                                                                        more decisive (hopefully) test caseMichael S2014/01/09 11:33 AM
                                                                  AVX2Eric Bron2014/01/09 11:14 AM
                                                                    AVX2Michael S2014/01/09 11:30 AM
                                                                      AVX2Eric Bron2014/01/09 11:40 AM
                                                                  another tryMichael S2014/01/09 02:02 PM
                                                                    another tryEric Bron2014/01/09 02:33 PM
                                                                      another tryMichael S2014/01/09 03:20 PM
                                                                      another try - ignore misformated mess aboveMichael S2014/01/09 03:24 PM
                                                                        another try - ignore misformated mess aboveGabriele Svelto2014/01/10 12:01 AM
                                                                          another try - ignore misformated mess aboveEric Bron2014/01/10 02:05 AM
                                                                            another try - ignore misformated mess aboveMichael S2014/01/11 09:23 AM
                                                                              another try - ignore misformated mess aboveEric Bron2014/01/11 10:08 AM
                                                                                another try - ignore misformated mess aboveMichael S2014/01/11 11:09 AM
                                                                                  another try - ignore misformated mess aboveMichael S2014/01/11 11:12 AM
                                                                                    another try - ignore misformated mess aboveEric Bron2014/01/11 11:24 AM
                                                                                      another try - ignore misformated mess aboveMichael S2014/01/11 12:24 PM
                                                                                        another try - ignore misformated mess aboveEric Bron2014/01/11 01:11 PM
                                                                                          another try - ignore misformated mess aboveMichael S2014/01/11 01:18 PM
                                                                                            another try - ignore misformated mess aboveEric Bron2014/01/11 01:27 PM
                                                                                              another try - ignore misformated mess aboveMichael S2014/01/11 01:29 PM
                                                                                                another try - ignore misformated mess aboveEric Bron2014/01/11 01:46 PM
                                                                                                  another try - ignore misformated mess aboveEric Bron2014/01/11 01:46 PM
                                                                                                  another try - ignore misformated mess aboveMichael S2014/01/11 02:28 PM
                                                                                        another try - ignore misformated mess aboveEric Bron2014/01/11 01:17 PM
                                                                                          another try - ignore misformated mess aboveMichael S2014/01/11 01:24 PM
                                                                    KNC versionMichael S2014/01/11 04:19 PM
                                                                      KNC versionEric Bron nli2014/01/12 01:59 AM
                                                                        KNC versionGabriele Svelto2014/01/12 08:06 AM
                                                  evil questionEric Bron2014/01/08 01:41 PM
              Knights Landing L/S bandwidthPatrick Chase2014/01/05 10:20 PM
                Knights Landing L/S bandwidthEric Bron2014/01/06 01:45 AM
                  Knights Landing L/S bandwidthanon2014/01/06 03:12 AM
                    Knights Landing L/S bandwidthMichael S2014/01/06 03:17 AM
                      Knights Landing L/S bandwidthanon2014/01/06 04:20 AM
          Knights Landing L/S bandwidthNicolas Capens2014/01/04 04:34 PM
            Knights Landing L/S bandwidthEric Bron2014/01/04 04:44 PM
              Knights Landing L/S bandwidthNicolas Capens2014/01/05 11:25 AM
                Knights Landing L/S bandwidthEric Bron2014/01/05 12:50 PM
                  Knights Landing L/S bandwidthNicolas Capens2014/01/05 02:34 PM
                    Might even help with gatherNicolas Capens2014/01/05 02:40 PM
                      What is an L0 cache?David Kanter2014/01/05 09:44 PM
                        What is an L0 cache?anon2014/01/06 04:57 AM
                          What is an L0 cache?Nicolas Capens2014/01/06 11:57 AM
                            What is an L0 cache?anon2014/01/06 01:18 PM
    Knights Landing L/S bandwidthDavid Kanter2014/01/04 09:58 AM
      Knights Landing L/S bandwidthNicolas Capens2014/01/04 03:24 PM
        Knights Landing L/S bandwidthEric Bron2014/01/04 03:46 PM
          Knights Landing L/S bandwidthKonrad Schwarz2014/01/07 11:48 PM
            Knights Landing L/S bandwidthMichael S2014/01/08 01:45 AM
        Knights Landing L/S bandwidthDavid Kanter2014/01/05 12:44 AM
          Knights Landing L/S bandwidthEric Bron2014/01/05 02:55 AM
          Knights Landing L/S bandwidthNicolas Capens2014/01/05 11:18 AM
            Knights Landing L/S bandwidthMaynard Handley2014/01/05 10:33 PM
              Knights Landing L/S bandwidthEric Bron2014/01/06 03:02 AM
                Knights Landing L/S bandwidthMichael S2014/01/06 03:23 AM
                  Knights Landing L/S bandwidthEric Bron2014/01/06 03:35 AM
                    Knights Landing L/S bandwidthMichael S2014/01/06 04:20 AM
                      Knights Landing L/S bandwidthMichael S2014/01/06 04:32 AM
                      Knights Landing L/S bandwidthEric Bron2014/01/06 04:36 AM
                        Knights Landing L/S bandwidthMichael S2014/01/06 05:00 AM
                          Knights Landing L/S bandwidthEric Bron2014/01/06 05:07 AM
                          Knights Landing L/S bandwidthEric Bron2014/01/06 05:14 AM
                            editsEric Bron2014/01/06 05:22 AM
                              optimized versionEric Bron2014/01/06 05:35 AM
                                yet more optimized versionEric Bron2014/01/06 05:42 AM
                                  latest version for todayEric Bron2014/01/06 05:51 AM
                                    Probably just L2 bandwith limitedNicolas Capens2014/01/06 10:48 AM
                                  yet more optimized versionMaynard Handley2014/01/06 05:54 PM
                                optimized versionMaynard Handley2014/01/06 05:52 PM
                                  optimized versionMichael S2014/01/07 09:42 AM
                                    optimized versionNicolas Capens2014/01/07 11:36 AM
                                      optimized versionMichael S2014/01/07 02:41 PM
                                        optimized versionNicolas Capens2014/01/07 09:52 PM
                                          optimized versionMichael S2014/01/08 01:10 AM
                                    optimized versionEric Bron2014/01/07 01:34 PM
                                      optimized versionMichael S2014/01/07 02:18 PM
                                        optimized versionEric Bron2014/01/07 02:30 PM
                                          optimized versionEric Bron2014/01/07 02:33 PM
                                            optimized versionMichael S2014/01/07 02:57 PM
                                    optimized versionMaynard Handley2014/01/07 05:50 PM
                                      optimized versionMichael S2014/01/08 01:39 AM
                Knights Landing L/S bandwidthMaynard Handley2014/01/06 05:47 PM
              Knights Landing L/S bandwidthNicolas Capens2014/01/06 08:18 AM
                Knights Landing L/S bandwidthMaynard Handley2014/01/06 05:56 PM
                  Knights Landing L/S bandwidthNicolas Capens2014/01/07 11:18 AM
        Knights Landing L/S bandwidthNoSpammer2014/01/05 12:15 PM
          Knights Landing L/S bandwidthNicolas Capens2014/01/05 02:06 PM
            Knights Landing L/S bandwidthNoSpammer2014/01/06 03:20 AM
              Knights Landing L/S bandwidthNicolas Capens2014/01/06 10:54 AM
                Knights Landing L/S bandwidthNoSpammer2014/01/06 12:24 PM
                  Knights Landing L/S bandwidthNicolas Capens2014/01/06 08:15 PM
                    Knights Landing L/S bandwidthNoSpammer2014/01/07 02:58 AM
                      Knights Landing L/S bandwidthNicolas Capens2014/01/07 02:18 PM
                        Knights Landing L/S bandwidthNoSpammer2014/01/08 12:38 PM
                          Knights Landing L/S bandwidthNicolas Capens2014/01/08 10:14 PM
  AVX512F questionMichael S2014/01/06 09:18 AM
    AVX512F questionNicolas Capens2014/01/06 11:01 AM
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How do you spell green?