Apple's AVX512

By: --- (---.delete@this.redheron.com), May 12, 2022 12:32 am
Room: Moderated Discussions
The investigation is not yet complete, but I've concluded that Apple has very interesting ambitions for AMX, way beyond what people imagine today.

The first round of patents describe basic AMX the way we think of it today, as an outer product engine that can be used to perform fast matrix multiply. Nice, but rather specialized.

The second round of patents describe ever fancier ways of this same outer product operation. So
- vectors can be fp64,32, 16 or int8
- vectors can even be very short (1, 2, 4 bits) routed through a lookup table. Very specialized ML stuff -- for now
- the vector that is used for the outer product can be specified in weird ways. Essentially imagine the pool of 8 512b X or Y vector registers as a single 8*64B very long X or Y register. Then you can specify a source as starting at a random place within this long vector, and proceeding with some stride
- masks
- you can even pack 2x2 matrices into these vectors for an alternate outer product mode (good for smaller matrices)

So lots of weird stuff, and easy to dismiss as basically strange requests by the ML team.


But the third round of patents include features like
- vector - vector operations (which will be 512b wide)
- extracting vectors from the Z result register
- executing simultaneous vector-vector instructions in parallel (as long as they write to different rows of the Z matrix)
- a new concern with the efficiency of the engines (which remember, live at the per-cluster level) in the face of aggressive simultaneous use by multiple cores.

To me the future seems clear as a somewhat interesting bifurcation.
While Intel put the full range of "vectors" into AVX512, Apple seems to have in mind something of a split, so
- NEON/SVE2 as the "latency/permuting" instruction set, probably only 256b, but able to slice and dice data within and between registers to your heart's content
- AMX as the "throughput" instruction set for matrix and "vertical" vector operations, basic stuff, few rearrangement options, but able to give you as many MACs as you wish.

Don't be surprised (I won't be) if AMX gets another shout-out at either WWDC or the September event...

I'm also now more sympathetic to Apple's current "keep everything behind API's" stance than I used to be. It's clear that every year they are rethinking what they can do so aggressively. The ISA has already become rather messy between generations one and two, let alone generation three. As far as I can tell, it's still the same ISA (creaking at the seams) but I expect at some point there will be a break and two very different versions of Accelerate will ship for the two different ISAs. I can now see why they don't want to be held back by compatibility issues; there are so many options that are opening up even with the current hardware, just as ways to get a lot more with just a minor tweak.

And, BTW, while the implementation requires matrix ops to cycle through the hardware four times on the E-cores, the vector-vector ops do not have to do this. In fact the E cores (at least to judge by the patents, though this may be at the A15 or even later level, not A14/M1) are capable of two full 512b vector-vector ops per cycle. An interesting contrast to Intel's on-going will-they won't-they vacillations around Alder Lake and AVX512 (which one suspects will only get worse in term of whether Intel's AMX is shared across the line, or kept for the high-end.)

(Oh, and as another thing that may one day get a dedicated shoutout -- did you know that Apple has its own VPU ala Movidius!? It clearly started as adding some smarts to the existing ISP; it's also now very clearly branched off into its own little world.)
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TopicPosted ByDate
Apple's AVX512---2022/05/12 12:32 AM
  Apple's AVX512Rayla2022/05/12 08:23 AM
    Apple's AVX512---2022/05/12 10:49 AM
      Apple's AVX512---2022/05/12 10:59 AM
  Questions About Apple's AVX512Matt Lohmann2022/05/13 05:21 AM
    Questions About Apple's AVX512---2022/05/13 09:33 AM
      Questions About Apple's AVX512Doug S2022/05/13 10:22 AM
        Questions About Apple's AVX512---2022/05/13 02:05 PM
          Questions About Apple's AVX512Doug S2022/05/13 09:28 PM
            Questions About Apple's AVX512Anon12022/05/14 12:53 AM
            Questions About Apple's AVX512Simon Farnsworth2022/05/14 05:20 AM
              Questions About Apple's AVX512Michael S2022/05/14 12:27 PM
                Questions About Apple's AVX512Doug S2022/05/15 10:50 AM
                  Questions About Apple's AVX512Michael S2022/05/15 01:01 PM
                    Questions About Apple's AVX512Doug S2022/05/16 12:59 AM
                      Questions About Apple's AVX512Michael S2022/05/16 02:29 AM
                    what it takes to really vectorizeRichardC2022/05/16 02:47 PM
                  Questions About Apple's AVX512---2022/05/16 10:22 PM
                    Questions About Apple's AVX512rwessel2022/05/17 01:42 AM
                      Questions About Apple's AVX512anon12022/05/17 04:47 AM
                        Questions About Apple's AVX512Michael S2022/05/17 06:28 AM
                          Questions About Apple's AVX512anon12022/05/18 01:15 AM
                            Questions About Apple's AVX512-.-2022/05/18 03:41 AM
                              Questions About Apple's AVX512Jan Wassenberg2022/05/18 10:23 PM
                                Questions About Apple's AVX512-.-2022/05/19 06:11 AM
                                  Questions About Apple's AVX512Jan Wassenberg2022/05/19 06:45 AM
                                    Questions About Apple's AVX512-.-2022/05/20 04:04 AM
                                      Questions About Apple's AVX512Jan Wassenberg2022/05/20 10:00 PM
                Questions About Apple's AVX512anon12022/05/16 04:44 AM
              Questions About Apple's AVX512Jörn Engel2022/05/15 11:34 PM
                Questions About Apple's AVX512Simon Farnsworth2022/05/16 04:13 AM
                  Questions About Apple's AVX512Jörn Engel2022/05/16 12:52 PM
                    Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/16 06:57 PM
                      Backward Compatibility for SVE2 CodeJörn Engel2022/05/17 12:30 AM
                        Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/17 03:31 AM
                          Backward Compatibility for SVE2 CodeJörn Engel2022/05/17 10:24 AM
                            Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/17 11:21 AM
                              Backward Compatibility for SVE2 CodeJörn Engel2022/05/17 02:11 PM
                                OpenMP SIMD DirectivesCharlie Burnes2022/05/17 04:05 PM
                                  OpenMP SIMD DirectivesJörn Engel2022/05/17 05:14 PM
                                    OpenMP SIMD DirectivesJan Wassenberg2022/05/20 10:12 PM
                                      OpenMP SIMD DirectivesFreddie2022/05/21 07:13 AM
                                        OpenMP SIMD DirectivesJan Wassenberg2022/05/21 10:54 PM
                                      OpenMP SIMD DirectivesJörn Engel2022/05/21 01:23 PM
                                        Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/21 10:11 PM
                                          Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/21 11:16 PM
                                            Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 06:30 AM
                                              Removal of NEONDoug S2022/05/22 10:57 AM
                                                Removal of NEONCharlie Burnes2022/05/22 01:12 PM
                                                Removal of NEON-.-2022/05/23 04:23 AM
                                                  Removal of NEONDoug S2022/05/23 08:08 AM
                                                    Removal of NEONdmcq2022/05/23 12:59 PM
                                                  Removal of NEONblaine2022/05/24 10:40 PM
                                              Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/22 12:06 PM
                                                Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 01:06 PM
                                                  Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/22 10:35 PM
                                              Alternative to Highway for code that is not SIMD width agnostic-.-2022/05/23 04:28 AM
                                          Alternative to Highway for code that is not SIMD width agnosticAdrian2022/05/22 05:04 AM
                                            Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 07:20 AM
                                          Alternative to Highway for code that is not SIMD width agnosticJörn Engel2022/05/22 01:13 PM
                                            Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 01:53 PM
                                              Alternative to Highway for code that is not SIMD width agnosticJörn Engel2022/05/22 02:49 PM
                                                Unaligned Loads and StoresCharlie Burnes2022/05/22 05:34 PM
                                                Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/22 10:46 PM
                                                  Unaligned Loads and StoresCharlie Burnes2022/05/23 12:46 AM
                                                    Unaligned Loads and StoresJan Wassenberg2022/05/23 05:34 AM
                                                  Is Highway a full compiler or yet another LLVM front-end, like icpc ? (NT)Michael S2022/05/23 01:12 AM
                                                    Is Highway a full compiler or yet another LLVM front-end, like icpc ?none2022/05/23 01:57 AM
                                                      Is Highway a full compiler or yet another LLVM front-end, like icpc ?Michael S2022/05/23 02:08 AM
                                                        Is Highway a full compiler or yet another LLVM front-end, like icpc ?Jan Wassenberg2022/05/23 05:38 AM
                                        OpenMP SIMD DirectivesJan Wassenberg2022/05/21 11:07 PM
                                          OpenMP SIMD DirectivesJörn Engel2022/05/22 01:25 PM
                                            OpenMP SIMD DirectivesJan Wassenberg2022/05/22 10:56 PM
                                              OpenMP SIMD DirectivesMichael S2022/05/23 02:32 AM
                                                OpenMP SIMD DirectivesJan Wassenberg2022/05/23 05:49 AM
                                                  OpenMP SIMD DirectivesMichael S2022/05/23 01:04 PM
                                                    OpenMP SIMD DirectivesJan Wassenberg2022/05/23 10:43 PM
                                        OpenMP SIMD Directivesanon22022/05/22 11:42 PM
                                          OpenMP SIMD DirectivesJörn Engel2022/05/23 12:11 AM
                                            OpenMP SIMD Directivesanon22022/05/23 12:47 AM
                                              TemplatesMichael S2022/05/23 02:52 AM
                                                Templatesanon22022/05/23 03:36 AM
                                                  At least use a handle unique in the thread you post in... (NT)anon22022/05/23 08:16 AM
                                              TemplatesJörn Engel2022/05/23 10:41 AM
                              Backward Compatibility for SVE2 Codeanonymou52022/05/17 02:36 PM
                                Lack of Backward Compatibility for Intel AVX512Charlie Burnes2022/05/17 03:22 PM
                                  Lack of Backward Compatibility for Intel AVX512anonymou52022/05/18 03:15 AM
                                    Lack of Backward Compatibility for Intel AVX512anon22022/05/18 03:36 AM
                                      Lack of Backward Compatibility for Intel AVX512anonymou52022/05/18 05:06 AM
                                        Lack of Backward Compatibility for Intel AVX512Michael S2022/05/18 05:36 AM
                                          Lack of Backward Compatibility for Intel AVX512me2022/05/18 05:50 AM
                                            Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/18 06:47 AM
                                              Lack of Backward Compatibility for Intel AVX512me2022/05/18 09:18 AM
                                              Lack of Backward Compatibility for Intel AVX512Doug S2022/05/18 10:26 AM
                                                Lack of Backward Compatibility for Intel AVX512Brett2022/05/18 11:03 AM
                                                  Lack of Backward Compatibility for Intel AVX512me2022/05/18 11:35 AM
                                                    Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/18 10:31 PM
                                                      Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 05:58 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 06:55 AM
                                                          Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 11:09 AM
                                                            Why Is AVX 512 Useful for RPCS3?-.-2022/06/15 07:04 PM
                                                              Why Is AVX 512 Useful for RPCS3?Jukka Larja2022/06/15 09:33 PM
                                                    Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 05:56 AM
                                                      Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 06:49 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 11:14 AM
                                                          Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 12:19 PM
                                                            Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/20 10:04 AM
                                                              Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/20 01:48 PM
                                                                Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/20 09:48 PM
                                                                  Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/21 07:44 PM
                                                                    Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/21 09:48 PM
                                                                      Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/22 02:46 AM
                                                                        Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/22 05:32 AM
                                                                          Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/22 04:06 PM
                                                                            Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/23 12:59 AM
                                                                              Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/23 11:02 PM
                                                                                Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/24 02:33 AM
                                                                                  Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/24 03:18 PM
                                                                                    Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/25 06:01 AM
                                                                                      Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/25 03:02 PM
                                                      Lack of Backward Compatibility for Intel AVX512Eugene Nalimov2022/05/19 10:25 PM
                                                        Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/20 09:34 AM
                                                  Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/18 10:40 PM
                                                    Lack of Backward Compatibility for Intel AVX512Andrey2022/05/19 09:26 AM
                                                    Lack of Backward Compatibility for Intel AVX512Brett2022/05/19 11:23 AM
                                                      Lack of Backward Compatibility for Intel AVX512Andrey2022/05/19 01:50 PM
                                                        Lack of Backward Compatibility for Intel AVX512Brett2022/05/20 11:52 PM
                                                  Lack of Backward Compatibility for Intel AVX512Adrian2022/05/19 12:22 AM
                                                  Lack of Backward Compatibility for Intel AVX512Brendan2022/05/19 04:32 AM
                                                Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/18 10:29 PM
                                                  Lack of Backward Compatibility for Intel AVX512Michael S2022/05/19 01:14 AM
                                                    Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 07:02 AM
                                                      Lack of Backward Compatibility for Intel AVX512Michael S2022/05/19 08:13 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/20 01:34 AM
                                                          Lack of Backward Compatibility for Intel AVX512Michael S2022/05/20 02:48 AM
                                                          OT Documentation on JPEG XL - site certificate brokenMichael S2022/05/20 03:17 AM
                                                            OT Documentation on JPEG XL - site certificate brokenJan Wassenberg2022/05/20 10:18 PM
                                                    Lack of Backward Compatibility for Intel AVX512-.-2022/05/20 03:55 AM
                                                      Lack of Backward Compatibility for Intel AVX512Michael S2022/05/20 05:51 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/20 10:54 PM
                                                          Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/20 10:57 PM
                                                            Lack of Backward Compatibility for Intel AVX512Michael S2022/05/21 10:57 AM
                                                              Lack of Backward Compatibility for Intel AVX512---2022/05/21 06:59 PM
                                                                Adding instructions to NEON??Doug S2022/05/22 11:01 AM
                                                                  Adding instructions to NEON??---2022/05/22 01:59 PM
                                                                    Adding instructions to NEON??Doug S2022/05/22 08:46 PM
                                                                      Adding instructions to NEON??Michael S2022/05/23 01:04 AM
                                                                        Adding instructions to NEON??anonymou52022/05/24 04:02 PM
                                                                      Adding instructions to NEON??Ungo2022/05/23 02:05 AM
                                                                        Adding instructions to NEON??---2022/05/23 06:49 AM
                                                                          Adding instructions to NEON??Ungo2022/05/23 09:01 PM
                                                                            Adding instructions to NEON??---2022/05/24 10:26 AM
                                                                      Adding instructions to NEON??---2022/05/23 06:56 AM
                                                                Lack of Backward Compatibility for Intel AVX512noko2022/05/23 12:29 PM
                                                              Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/21 11:47 PM
                                                                Lack of Backward Compatibility for Intel AVX512Michael S2022/05/22 01:40 AM
                                                                  Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/22 04:06 AM
                                                                    Lack of Backward Compatibility for Intel AVX512Michael S2022/05/22 05:12 AM
                                                                      Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/22 05:53 AM
                                                                        Lack of Backward Compatibility for Intel AVX512Michael S2022/05/22 06:15 AM
                                                                          Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/22 11:56 AM
                                              Lack of Backward Compatibility for Intel AVX512-.-2022/05/18 05:23 PM
                                                Sierra Forest Xeons - E Cores OnlyCharlie Burnes2022/05/19 03:11 AM
                                                  Sierra Forest Xeons - E Cores OnlyBrendan2022/05/19 04:42 AM
                                                    Sierra Forest Xeons - E Cores OnlyCharlie Burnes2022/05/19 05:30 AM
                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/20 04:06 AM
                                                        Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/20 11:32 AM
                                                          Sierra Forest Xeons - E Cores OnlyMark2022/05/20 12:15 PM
                                                            Sierra Forest Xeons - E Cores OnlyAndrey2022/05/20 03:34 PM
                                                            Sierra Forest Xeons - E Cores OnlyBrendan2022/05/20 05:29 PM
                                                            Sierra Forest Xeons - E Cores OnlyBjörn Ragnar Björnsson2022/05/20 05:54 PM
                                                              Sierra Forest Xeons - E Cores OnlyBrendan2022/05/20 08:42 PM
                                                                Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/21 12:06 AM
                                                                  Sierra Forest Xeons - E Cores Onlyanon22022/05/21 01:45 AM
                                                                    Sierra Forest Xeons - E Cores OnlyDoug S2022/05/21 12:33 PM
                                                                      Sierra Forest Xeons - E Cores OnlyBrett2022/05/21 05:18 PM
                                                                      Sierra Forest Xeons - E Cores Onlyanon22022/05/22 01:32 AM
                                                                  Sierra Forest Xeons - E Cores Onlyrwessel2022/05/21 05:05 AM
                                                                  Sierra Forest Xeons - E Cores OnlyBrendan2022/05/21 10:36 AM
                                                                    Sierra Forest Xeons - E Cores OnlyAndrey2022/05/21 11:30 AM
                                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/21 12:58 PM
                                                                        Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/21 04:58 PM
                                                                          Sierra Forest Xeons - E Cores Only-.-2022/05/21 07:03 PM
                                                                          Sierra Forest Xeons - E Cores OnlyBrendan2022/05/22 11:18 AM
                                                                            Sierra Forest Xeons - E Cores OnlyAndrey2022/05/22 04:18 PM
                                                                              Sierra Forest Xeons - E Cores OnlyBrendan2022/05/22 08:41 PM
                                                                                Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/22 09:49 PM
                                                                                  Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/22 11:11 PM
                                                                                    Proposal for heterogeneous runtime dispatchJörn Engel2022/05/22 11:51 PM
                                                                                      Proposal for heterogeneous runtime dispatchAdrian2022/05/23 12:25 AM
                                                                                        CorrectionAdrian2022/05/23 12:34 AM
                                                                                      Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/23 12:41 AM
                                                                                    Proposal for heterogeneous runtime dispatchUngo2022/05/23 01:27 AM
                                                                                      Proposal for heterogeneous runtime dispatchMichael S2022/05/23 03:14 AM
                                                                                      Heterogeneous ISA?Jan Wassenberg2022/05/23 06:11 AM
                                                                                        RISC-VPeter Lewis2022/05/30 03:45 PM
                                                                                          RISC-VHeikki Kultala2022/05/31 08:59 AM
                                                                                            RISC-VPeter Lewis2022/05/31 04:34 PM
                                                                                              RISC-VDoug S2022/06/01 12:45 AM
                                                                                                RISC-VPeter Lewis2022/06/01 03:55 PM
                                                                                                  RISC-VDoug S2022/06/01 09:50 PM
                                                                                                    RISC-V Eric Fink2022/06/02 12:20 AM
                                                                                                      Process...Anon2022/06/02 12:35 AM
                                                                                                        Process...Peter Lewis2022/06/02 01:54 AM
                                                                                                        Process...Michael S2022/06/02 04:42 AM
                                                                                                        Process...Eric Fink2022/06/02 05:43 AM
                                                                                                          Process...---2022/06/02 01:06 PM
                                                                                                            Process...Peter Lewis2022/06/02 02:01 PM
                                                                                                              Process... ItaniumRichard S2022/06/02 05:14 PM
                                                                                                                ItaniumPeter Lewis2022/06/02 06:07 PM
                                                                                                                  ItaniumRichard S2022/06/02 09:27 PM
                                                                                                                Process... ItaniumMichael S2022/06/03 04:39 AM
                                                                                                                  Process... ItaniumAdrian2022/06/03 05:26 AM
                                                                                                                    Process... ItaniumMichael S2022/06/03 06:32 AM
                                                                                                                      Process... ItaniumAdrian2022/06/03 07:14 AM
                                                                                                              Process...Doug S2022/06/02 10:54 PM
                                                                                                                Process...Peter Lewis2022/06/03 01:19 AM
                                                                                                            Process...Mark Roulo2022/06/02 08:15 PM
                                                                                                              Process...Michael S2022/06/03 05:06 AM
                                                                                                            Process...Brendan2022/06/02 09:13 PM
                                                                                                          Process...anon22022/06/02 04:13 PM
                                                                                                            Process...Eric Fink2022/06/02 10:00 PM
                                                                                                              Process...Michael S2022/06/03 05:16 AM
                                                                                                                Process...Doug S2022/06/03 08:57 AM
                                                                                                                  Process...James2022/06/04 04:46 AM
                                                                                                                    Process...Doug S2022/06/04 09:04 AM
                                                                                                                      Process...Anon42022/06/04 10:31 AM
                                                                                                                      Process...James2022/06/04 10:49 AM
                                                                                                          Process...Anon2022/06/05 02:55 AM
                                                                                                        There is no 5nm or 7nm anywhere.Heikki Kultala2022/06/02 10:45 AM
                                                                                                          There is no 5nm or 7nm anywhere.Doug S2022/06/02 11:10 AM
                                                                                                            There is no 5nm or 7nm anywhere.Heikki Kultala2022/06/02 11:50 AM
                                                                                                            There is no 5nm or 7nm anywhere.Peter Lewis2022/06/02 12:07 PM
                                                                                                            There is no 5nm or 7nm anywhere.anon22022/06/02 04:30 PM
                                                                                                          There is no 5nm or 7nm anywhere.Anon2022/06/05 01:41 AM
                                                                                                    RISC-VPeter Lewis2022/06/02 01:22 AM
                                                                                                      RISC-VFreddie2022/06/02 07:22 AM
                                                                                                        RISC-V---2022/06/02 01:25 PM
                                                                                                    RISC-VAdrian2022/06/02 01:47 AM
                                                                                                      RISC-VDoug S2022/06/02 11:18 AM
                                                                                                      x86 vs RISCHeikki Kultala2022/06/02 12:04 PM
                                                                                                        x86 vs RISCAnon2022/06/02 02:49 PM
                                                                                                          x86 vs RISCTim Mc2022/06/02 04:20 PM
                                                                                                          x86 vs RISCDoug S2022/06/02 11:01 PM
                                                                                                            x86 vs RISCAnon2022/06/05 01:55 AM
                                                                                                              x86 vs RISCPeter Lewis2022/06/05 04:23 PM
                                                                                                                x86 vs RISCAnon2022/06/05 04:32 PM
                                                                                                                Register Windows.Mark Roulo2022/06/06 09:56 AM
                                                                                                                  Register Windows.blaine2022/06/06 01:51 PM
                                                                                                                    S/W managed TLB missesMark Roulo2022/06/06 02:18 PM
                                                                                                                      S/W managed TLB missesMichael S2022/06/06 02:31 PM
                                                                                                                      S/W managed TLB missesblaine2022/06/06 11:53 PM
                                                                                                                      S/W managed TLB missesvonk2022/06/07 01:04 AM
                                                                                                                      S/W managed TLB missesDoug S2022/06/07 08:50 AM
                                                                                                                        S/W managed TLB missesanon22022/06/07 10:21 PM
                                                                                                                          S/W managed TLB missesJames2022/06/08 02:07 AM
                                                                                                                            S/W managed TLB missesMichael S2022/06/08 02:20 AM
                                                                                                                            S/W managed TLB missesanon22022/06/08 02:53 AM
                                                                                                                          Fairchild Clipper had h/w table walkPaul A. Clayton2022/06/09 12:46 PM
                                                                                                                            Fairchild Clipper had h/w table walkSimon Farnsworth2022/06/10 01:58 AM
                                                                                                                    Register Windows.anon22022/06/06 03:21 PM
                                                                                                        x86 vs RISCEric Fink2022/06/02 10:11 PM
                                                                                                          x86 vs RISCMichael S2022/06/03 06:49 AM
                                                                                                            x86 vs RISCBrett2022/06/03 12:32 PM
                                                                                                            x86 vs RISCAnon2022/06/05 02:23 AM
                                                                                                        x86 vs RISCAdrian2022/06/02 11:47 PM
                                                                                                      RISC-VAnon2022/06/02 02:33 PM
                                                                                                  RISC-V lifespan; encodings2022/06/04 11:39 AM
                                                                                                    µop CachePeter Lewis2022/06/04 06:56 PM
                                                                                                      x86 decode cores2022/06/05 12:32 AM
                                                                                                        x86 decode coresPeter Lewis2022/06/05 01:26 AM
                                                                                                        x86 decode coresPeter Lewis2022/06/06 04:22 AM
                                                                                                      µop CacheDoug S2022/06/05 11:08 AM
                                                                                                    RISC-V lifespan; encodingsEric Fink2022/06/05 04:26 AM
                                                                                                      RISC-V lifespan; encodings2022/06/05 07:37 AM
                                                                                                        RISC-V lifespan; encodingsanonymou52022/06/05 12:32 PM
                                                                                                          RISC-V lifespan; encodingsAnon2022/06/05 03:09 PM
                                                                                                          RISC-V lifespan; encodings2022/06/06 07:52 AM
                                                                                                            RISC-V lifespan; encodingsanonymou52022/06/06 08:07 AM
                                                                                                              RISC-V lifespan; encodingsAdrian2022/06/06 10:59 AM
                                                                                                                RISC-V lifespan; encodingsAnon2022/06/06 12:38 PM
                                                                                                                  RISC-V lifespan; encodingsAdrian2022/06/07 01:21 AM
                                                                                                                    RISC-V lifespan; encodingsMichael S2022/06/07 02:23 AM
                                                                                                                      RISC-V lifespan; encodingsAdrian2022/06/07 05:20 AM
                                                                                                                        RISC-V lifespan; encodingsBrett2022/06/07 06:04 PM
                                                                                                                          RISC-V lifespan; encodingsAnon2022/06/07 09:58 PM
                                                                                                                            RISC-V lifespan; encodings2022/06/08 08:07 AM
                                                                                                                              RISC-V lifespan; encodingsAnon2022/06/08 10:25 AM
                                                                                                                                RISC-V lifespan; encodings2022/06/08 12:07 PM
                                                                                                                RISC-V lifespan; encodingsBrett2022/06/06 01:50 PM
                                                                                                                  RISC-V lifespan; encodingsAdrian2022/06/07 12:59 AM
                                                                                                              RISC-V lifespan; encodingsAdrian2022/06/06 10:59 AM
                                                                                                              RISC-V lifespan; encodings2022/06/06 11:08 AM
                                                                                                    RISC-V lifespan; encodings---2022/06/05 06:12 PM
                                                                                                      RISC-V lifespan; encodingsAnon2022/06/05 06:48 PM
                                                                                                      RISC-V lifespan; encodingsJukka Larja2022/06/05 10:18 PM
                                                                                                        Profile-Guided OptimizationPeter Lewis2022/06/06 03:55 AM
                                                                                                          Profile-Guided Optimizationrwessel2022/06/06 05:26 AM
                                                                                                            Profile-Guided OptimizationDoug S2022/06/06 10:44 AM
                                                                                                              Profile-Guided OptimizationAndrew Clough2022/06/06 11:08 AM
                                                                                                              Profile-Guided Optimizationrwessel2022/06/06 11:57 AM
                                                                                                                Example of JIT cacheMark Roulo2022/06/06 02:10 PM
                                                                                                                  Example of JIT cacherwessel2022/06/06 02:59 PM
                                                                                                                    Example of JIT cacheMark Roulo2022/06/07 06:40 AM
                                                                                                                      Example of JIT cacherwessel2022/06/07 07:46 AM
                                                                                                              Profile-Guided OptimizationSimon Farnsworth2022/06/07 02:47 AM
                                                                                                          Profile-Guided OptimizationJukka Larja2022/06/06 08:42 PM
                                                                                                      Accurate branch prediction is not everythingPaul A. Clayton2022/06/14 11:48 AM
                                                                                                        Accurate branch prediction is not everything---2022/06/14 01:40 PM
                                                                                                          Accurate branch prediction is not everythingJames2022/06/14 03:41 PM
                                                                                                        Accurate branch prediction is not everythingdmcq2022/06/15 09:38 AM
                                                                                                          Accurate branch prediction is not everythingnone2022/06/15 09:57 AM
                                                                                                            Accurate branch prediction is not everythingdmcq2022/06/15 10:23 AM
                                                                                                            Accurate branch prediction is not everythingDoug S2022/06/15 01:55 PM
                                                                                                              Accurate branch prediction is not everythingdmcq2022/06/15 04:38 PM
                                                                                                Adding Neural Engines to x86Peter Lewis2022/06/04 07:06 PM
                                                                                                  Adding Neural Engines to x86Freddie2022/06/05 12:07 PM
                                                                                                    Adding Neural Engines to x86Peter Lewis2022/06/05 04:20 PM
                                                                                                      Adding Neural Engines to x86---2022/06/05 06:40 PM
                                                                                                        Adding Neural Engines to x86Peter Lewis2022/06/05 09:22 PM
                                                                                                  Adding Neural Engines to x86---2022/06/05 06:34 PM
                                                                                                    Missing metricsAnon2022/06/05 06:59 PM
                                                                                                    Adding Neural Engines to x86Peter Lewis2022/06/06 03:41 AM
                                                                                            RISC-VJan Wassenberg2022/05/31 10:00 PM
                                                                                              RISC-VPeter Lewis2022/06/01 04:02 PM
                                                                                                RISC-VJan Wassenberg2022/06/01 10:17 PM
                                                                                              RISC-V Eric Fink2022/06/02 12:25 AM
                                                                                                RISC-VJan Wassenberg2022/06/02 11:10 PM
                                                                                                  RISC-VEric Fink2022/06/03 12:23 AM
                                                                                                    RISC-VJan Wassenberg2022/06/03 11:10 PM
                                                                                                      RISC-VJukka Larja2022/06/04 12:15 AM
                                                                                                        RISC-VJan Wassenberg2022/06/04 11:23 PM
                                                                                                      RISC-VEric Fink2022/06/04 05:59 AM
                                                                                                        RISC-VJan Wassenberg2022/06/04 11:14 PM
                                                                                                    RISC-VLinus Torvalds2022/06/04 10:17 AM
                                                                                                      RISC-V-.-2022/06/04 05:56 PM
                                                                                                        RISC-VLinus Torvalds2022/06/04 08:00 PM
This Post has been deleted
                                                                                                      RISC-VEric Fink2022/06/05 04:31 AM
                                                                                                        SIMD in parsingWilco2022/06/05 05:40 AM
                                                                                                          SIMD in parsingFoo_2022/06/06 02:19 AM
                                                                                                            SIMD in parsingMichael S2022/06/06 02:43 AM
                                                                                                              SIMD in parsingLinus Torvalds2022/06/06 09:40 AM
                                                                                                          SIMD in parsing-.-2022/06/08 05:28 AM
                                                                                              RISC-V V-extensionHeikki Kultala2022/06/02 10:40 AM
                                                                                                RISC-V V-extensionJan Wassenberg2022/06/02 11:09 PM
                                                                                            RISC-VPer Hesselgren2022/06/01 05:40 AM
                                                                                    Proposal for heterogeneous runtime dispatchBrendan2022/05/23 01:51 AM
                                                                                    Proposal for heterogeneous runtime dispatchBrendan2022/05/23 01:51 AM
                                                                                      Proposal for heterogeneous runtime dispatchBjörn Ragnar Björnsson2022/05/23 05:41 PM
                                                                                        Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/23 10:38 PM
                                                                                          Proposal for heterogeneous runtime dispatchJukka Larja2022/05/24 02:48 AM
                                                                                            Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/24 04:35 AM
                                                                                              Proposal for heterogeneous runtime dispatchJukka Larja2022/05/24 07:38 AM
                                                                                                Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/29 12:51 AM
                                                                                          Proposal for heterogeneous runtime dispatchMichael S2022/05/24 03:48 AM
                                                                                            SIMD applicabilityJan Wassenberg2022/05/24 04:50 AM
                                                                                              Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityMark Roulo2022/05/24 07:41 AM
                                                                                                Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityJan Wassenberg2022/05/24 11:23 AM
                                                                                                  Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneitySimon Farnsworth2022/05/24 01:56 PM
                                                                                                Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityBrendan2022/05/24 05:09 PM
                                                                                                  Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityDoug S2022/05/24 10:03 PM
                                                                                                    Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityBrendan2022/05/25 05:37 PM
                                                                                                  Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityJukka Larja2022/05/25 06:24 AM
                                                                                                    Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityBrendan2022/05/25 06:16 PM
                                                                                                      Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityJukka Larja2022/05/25 08:50 PM
                                                                                            Proposal for heterogeneous runtime dispatchAdrian2022/05/24 02:39 PM
                                                                                              Proposal for heterogeneous runtime dispatchJörn Engel2022/05/24 09:41 PM
                                                                                              Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/29 12:51 AM
                                                                                                Proposal for heterogeneous runtime dispatchAdrian2022/05/29 04:33 AM
                                                                                                  Proposal for heterogeneous runtime dispatchAdrian2022/05/29 04:48 AM
                                                                                                  Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/29 11:05 AM
                                                                                                    Proposal for heterogeneous runtime dispatchAdrian2022/05/29 01:39 PM
                                                                                                      turbostat instructionsJan Wassenberg2022/05/29 10:51 PM
                                                                                                  Proposal for heterogeneous runtime dispatchSome dude2022/05/30 12:04 PM
                                                                                          Proposal for heterogeneous runtime dispatchSimon Farnsworth2022/05/24 04:21 AM
                                                                                  Sierra Forest Xeons - E Cores OnlyBrendan2022/05/23 12:41 AM
                                                                                    Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/23 03:03 AM
                                                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/23 09:12 AM
                                                                                        Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/24 04:18 AM
                                                                                          Sierra Forest Xeons - E Cores Onlyrwessel2022/05/24 08:22 AM
                                                                                    Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/23 12:30 PM
                                                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/23 01:13 PM
                                                                                        Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/23 04:54 PM
                                                                                          Sierra Forest Xeons - E Cores Only2022/05/24 11:49 AM
                                                                                            Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/24 12:11 PM
                                                                                              Sierra Forest Xeons - E Cores Only2022/05/24 03:12 PM
                                                                                                Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/24 04:33 PM
                                                                                          Sierra Forest Xeons - E Cores OnlyBrendan2022/05/24 01:44 PM
                                                                                            Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/24 02:14 PM
                                                                                              Sierra Forest Xeons - E Cores Only2022/05/24 03:37 PM
                                                                                                Sierra Forest Xeons - E Cores OnlyJames2022/05/26 03:42 AM
                                                                                              Sierra Forest Xeons - E Cores OnlyBrendan2022/05/24 09:53 PM
                                                                                              Sierra Forest Xeons - E Cores OnlyJörn Engel2022/05/25 12:09 AM
                                                                                                Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/25 02:27 AM
                                                                                                  Sierra Forest Xeons - E Cores OnlyJan Wassenberg2022/05/29 12:49 AM
                                                                                                    Sierra Forest Xeons - E Cores OnlyMichael S2022/05/29 02:15 AM
                                                                                                      Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/29 10:48 AM
                                                                                                        Sierra Forest Xeons - E Cores Onlyanonymou52022/05/29 11:35 AM
                                                                                                          Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/30 11:07 AM
                                                                                                            Sierra Forest Xeons - E Cores Onlyanonymou52022/05/30 12:46 PM
                                                                                                        Sierra Forest Xeons - E Cores OnlyMichael S2022/05/29 11:59 AM
                                                                                                      Sierra Forest Xeons - E Cores OnlyJan Wassenberg2022/05/29 11:20 AM
                                                                                                        Sierra Forest Xeons - E Cores OnlyMichael S2022/05/29 01:38 PM
                                                                                                          Sierra Forest Xeons - E Cores OnlyJörn Engel2022/05/29 02:10 PM
                                                                                                          Sierra Forest Xeons - E Cores Only-.-2022/05/29 05:28 PM
                                                                                                            Sierra Forest Xeons - E Cores OnlyMichael S2022/05/30 01:32 AM
                                                                                                              Sierra Forest Xeons - E Cores Only-.-2022/05/30 02:44 AM
                                                                                                                Sierra Forest Xeons - E Cores OnlyMichael S2022/05/30 03:12 AM
                                                                                                                  Sierra Forest Xeons - E Cores Only-.-2022/05/30 05:46 AM
                                                                                                          Sierra Forest Xeons - E Cores OnlyJan Wassenberg2022/05/29 10:48 PM
                                                                                                            quick radix mergeMichael S2022/05/30 01:02 AM
                                                                                                              quick radix mergeJan Wassenberg2022/05/30 07:16 AM
                                                                                                                quick radix mergeMichael S2022/05/30 08:36 AM
                                                                                                                  quick radix mergeJan Wassenberg2022/05/30 10:07 PM
                                                                                                                quick radix mergerwessel2022/05/30 09:36 AM
                                                                                      Sierra Forest Xeons - E Cores OnlyChristian Bornträger2022/05/24 08:06 AM
                                                                                        Sierra Forest Xeons - E Cores Onlyrwessel2022/05/24 08:40 AM
                                                                          Sierra Forest Xeons - E Cores Only2022/05/22 11:51 AM
                                                                            Sierra Forest Xeons - E Cores OnlyDoug S2022/05/22 08:52 PM
                                                                              Linux doesn't have a plan for hetero-ISA CPUs2022/05/23 06:03 AM
                                                                                Linux doesn't have a plan for hetero-ISA CPUsDoug S2022/05/23 08:35 AM
                                                                                  Linux doesn't have a plan for hetero-ISA CPUsBrendan2022/05/23 11:44 AM
                                                                                    Linux doesn't have a plan for hetero-ISA CPUsGionatan Danti2022/05/24 06:29 AM
                                                                            Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/23 04:16 AM
                                                                    Sierra Forest Xeons - E Cores OnlyJukka Larja2022/05/21 10:23 PM
                                                          well said (NT)Michael S2022/05/21 11:48 AM
                                                  Sierra Forest Xeons - E Cores OnlyMichael S2022/05/19 05:00 AM
                                                  Sierra Forest Xeons - E Cores Only-.-2022/05/19 06:25 AM
                                                    Sierra Forest Xeons - E Cores OnlyMichael S2022/05/20 06:29 AM
                                                  Sierra Forest Xeons - E Cores Onlyanonymou52022/05/19 09:46 AM
                                                    Sierra Forest Xeons - E Cores OnlyCharlie Burnes2022/05/19 02:19 PM
                                                      Sierra Forest Xeons - E Cores OnlyAdrian2022/05/20 12:29 AM
                                              Lack of Backward Compatibility for Intel AVX512Adrian2022/05/18 11:57 PM
                                                Lack of Backward Compatibility for Intel AVX512Brett2022/05/19 10:55 AM
                                                  Lack of Backward Compatibility for Intel AVX512Michael S2022/05/19 11:53 AM
                                                  Lack of Backward Compatibility for Intel AVX512Adrian2022/05/20 12:38 AM
                              Backward Compatibility for SVE2 Code---2022/05/17 02:57 PM
                                Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/17 04:12 PM
                                Backward Compatibility for SVE2 Codeanon12022/05/18 02:44 AM
                                  Backward Compatibility for SVE2 CodeSimon Farnsworth2022/05/18 03:03 AM
                                    Backward Compatibility for SVE2 CodeDoug S2022/05/18 10:14 AM
                                      Backward Compatibility for SVE2 Codedmcq2022/05/20 05:43 AM
                                        Backward Compatibility for SVE2 CodeDoug S2022/05/20 10:07 AM
                                          Backward Compatibility for SVE2 Codedmcq2022/05/21 08:35 AM
                                            Backward Compatibility for SVE2 Codedmcq2022/05/21 08:57 AM
                                  Backward Compatibility for SVE2 Code---2022/05/18 09:56 AM
                      Backward Compatibility for SVE2 CodeJan Wassenberg2022/05/17 12:26 PM
                        Backward Compatibility for SVE2 Code---2022/05/17 03:01 PM
                        Use of Highway to provide backward compatibilityCharlie Burnes2022/05/18 03:55 PM
                          Use of Highway to provide backward compatibilityBrett2022/05/18 08:57 PM
                            Use of Highway to provide backward compatibilityJan Wassenberg2022/05/18 10:16 PM
                              Use of Highway to provide backward compatibilityCharlie Burnes2022/05/18 11:03 PM
                                Use of Highway to provide backward compatibilityBrett2022/05/18 11:20 PM
                                  Use of Highway to provide backward compatibility---2022/05/19 01:20 PM
                                    Use of Highway to provide backward compatibilityCharlie Burnes2022/05/19 03:05 PM
                                      Use of Highway to provide backward compatibilityBrett2022/05/19 04:18 PM
                                        Use of Highway to provide backward compatibilityCharlie Burnes2022/05/19 07:29 PM
                                          Use of Highway to provide backward compatibilityJan Wassenberg2022/05/19 09:12 PM
                                            Use of Highway to provide backward compatibilityBrett2022/05/19 10:38 PM
                                            Use of Highway to provide backward compatibilityCharlie Burnes2022/05/21 07:48 AM
                                              Use of Highway to provide backward compatibilityCharlie Burnes2022/05/21 12:36 PM
                                              Use of Highway to provide backward compatibilityJan Wassenberg2022/05/21 10:45 PM
                                                Use of Highway to provide backward compatibilityCharlie Burnes2022/05/22 07:52 AM
        Questions About Apple's AVX512dmcq2022/05/13 04:24 PM
      Questions About Apple's AVX512Matt Lohmann2022/05/13 01:32 PM
        Questions About Apple's AVX512---2022/05/13 02:09 PM
        Questions About Apple's AVX512Anon12022/05/13 03:55 PM
          Questions About Apple's AVX512Matt Lomann2022/05/13 07:02 PM
            Questions About Apple's AVX512---2022/05/13 09:03 PM
            Questions About Apple's AVX512Simon Farnsworth2022/05/14 06:11 AM
              Questions About Apple's AVX512---2022/05/14 12:06 PM
        Questions About Apple's AVX512Adrian2022/05/14 12:35 AM
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