Big gotchas: poor specs

By: Ricardo B (ricardo.b.delete@this.xxxxx.xx), August 19, 2019 5:40 pm
Room: Moderated Discussions
Michael S (already5chosen.delete@this.yahoo.com) on August 19, 2019 4:37 am wrote:
> aaron spink (aaronspink.delete@this.notearthlink.net) on August 19, 2019 4:05 am wrote:
> > Jouni Osmala (fname.sname.delete@this.aalto.fi) on August 15, 2019 9:03 pm wrote:
> > > Does that operate on C code or VHDL or what? Just curious if really fast
> > > c compiler/linker with good optimizations would solve that problem.
> > >
> > It is an HDL to C object code flow instead of the more traditional interpreted flow (though those if
> > anything are slower to compile). The HDL to C results in models that run significantly faster( order
> > to orders of magnitude). In addition, it leverages all the benefits of a standard C flow over some
> > proprietary interpreter including the robust testing and debug infrastructure and optimizations.
> >
> >
>
> So C part of the tool chain has to deal with huge number of machine-generated modules with unusually
> high, relatively to hand-written C, proportion of global functions and variables?
> I.e. something for which "major" compilers and linkers (gcc,
> llvm-clang, MSVC, ICC) were not really optimized?
> Or is it even worse and generated modules are in C++?

I don't know which exact tool Aaron is using but
a) Xilinx's simulator clearly uses GCC. I think it's C but I never looked under the hood.

b) Cadence's simulator somehow converts to native code. It _seems_ to handle it internally without using open source compilers as infrastructure.

In any case, 10 million lines of code isn't underheard for software projects. And 15 minutes link time isn't either.


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EPYC SAP-SD 2-tier benchmark resultsMichael S2019/08/08 05:18 AM
  EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownMichael S2019/08/08 08:29 AM
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      EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownblue2019/08/08 07:35 PM
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          EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownAlberto2019/08/09 03:09 AM
            EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownblue2019/08/09 08:47 AM
        EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownAlberto2019/08/09 02:12 AM
          EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownMaynard Handley2019/08/09 09:25 AM
            EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownDoug S2019/08/09 09:33 AM
              EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownanon2019/08/09 10:24 AM
            EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownAlberto2019/08/10 04:04 AM
          EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownanon.12019/08/09 05:30 PM
        EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownme2019/08/09 09:58 PM
      EPYC SAP-SD 2-tier benchmark results - EPYC2 is in class of its ownanon2019/08/09 12:47 AM
  EPYC SAP-SD 2-tier benchmark resultsLinus Torvalds2019/08/09 03:29 PM
    EPYC SAP-SD 2-tier benchmark resultsanon2019/08/10 07:20 AM
      EPYC SAP-SD 2-tier benchmark resultsme2019/08/10 07:36 AM
        EPYC SAP-SD 2-tier benchmark resultsanon2019/08/10 08:20 AM
          EPYC SAP-SD 2-tier benchmark resultsanon.12019/08/10 09:40 AM
            EPYC SAP-SD 2-tier benchmark resultsanon2019/08/10 10:38 AM
          EPYC SAP-SD 2-tier benchmark resultsblue2019/08/10 09:47 AM
        EPYC SAP-SD 2-tier benchmark resultsAdrian2019/08/10 10:43 AM
          EPYC SAP-SD 2-tier benchmark resultsme2019/08/10 11:06 AM
            EPYC SAP-SD 2-tier benchmark resultsMichael S2019/08/10 11:28 AM
    Big gotchas: poor specsjohn2019/08/10 10:54 AM
      Big gotchas: poor specsme2019/08/10 11:04 AM
      Big gotchas: poor specsanon2019/08/10 11:25 AM
        Big gotchas: poor specsLinus Torvalds2019/08/10 12:13 PM
          Big gotchas: poor specsanon2019/08/10 01:58 PM
          Big gotchas: poor caches2019/08/12 01:51 AM
            Big gotchas: poor caches2019/08/12 01:59 AM
            Big gotchas: poor cachesTravis Downs2019/08/12 09:15 AM
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            Big gotchas: poor cachesAndy N2019/08/12 06:45 PM
              Big gotchas: poor cachesanon2019/08/13 12:43 AM
          Big gotchas: poor specsJouni Osmala2019/08/12 10:18 PM
            Big gotchas: poor specsAdrian2019/08/12 11:58 PM
              Kernel compile 25-30s, noise 25-27dBJouni Osmala2019/08/13 04:00 AM
                Quiet and fast workstationsGian-Carlo Pascutto2019/08/13 06:00 AM
                  Quiet and fast workstationsAdrian2019/08/13 07:01 AM
                  Quiet and fast workstationsDavid Hess2019/08/13 01:51 PM
                    Quiet and fast workstationsGian-Carlo Pascutto2019/08/14 12:43 AM
                      Quiet and fast workstationsMichael S2019/08/14 02:09 AM
                        Quiet and fast workstationsGian-Carlo Pascutto2019/08/14 02:59 AM
                          Quiet and fast workstationsDavid Hess2019/08/14 06:05 PM
                        Quiet and fast workstationsDavid Hess2019/08/14 05:56 PM
                      Quiet and fast workstationsDavid Hess2019/08/14 06:30 PM
                  Passively cooled threadripper/xeon WJouni Osmala2019/08/15 03:12 AM
                    Passively cooled threadripper/xeon WAdrian2019/08/15 03:47 AM
                      Passively cooled threadripper/xeon WJouni Osmala2019/08/15 05:58 AM
                        Passively cooled threadripper/xeon WAdrian2019/08/16 12:12 AM
                          Passively cooled threadripper/xeon WAdrian2019/08/16 12:21 AM
                          Passively cooled threadripper/xeon WJouni osmala2019/08/16 09:46 AM
                            Passively cooled threadripper/xeon WGroo2019/08/16 12:07 PM
                Kernel compile 25-30s, noise 25-27dBAdrian2019/08/13 06:39 AM
                Kernel compile 25-30s, noise 25-27dBLinus Torvalds2019/08/13 12:12 PM
                  which graphics card?anonymous22019/08/13 12:52 PM
                    which graphics card?Linus Torvalds2019/08/13 01:12 PM
                  Kernel compile 25-30s, noise 25-27dBDoug S2019/08/13 03:22 PM
                    Kernel compile 25-30s, noise 25-27dBDavid Hess2019/08/14 06:38 PM
                  Kernel compile 25-30s, noise 25-27dBJouni Osmala2019/08/14 12:09 AM
                    AIOsGroo2019/08/14 07:19 AM
                      AIOsGian-Carlo Pascutto2019/08/14 08:52 AM
                        AIOsGroo2019/08/14 09:49 AM
                      AIOsBrett2019/08/14 02:02 PM
                    Kernel compile 25-30s, noise 25-27dBLinus Torvalds2019/08/14 11:10 AM
                  Kernel compile 25-30s, noise 25-27dBGian-Carlo Pascutto2019/08/14 01:33 AM
                    Kernel compile 25-30s, noise 25-27dBAdrian2019/08/14 05:06 AM
                      Kernel compile 25-30s, noise 25-27dBGian-Carlo Pascutto2019/08/14 09:01 AM
                      AMD Bios, etc..Anon2019/08/14 11:39 PM
                        AMD Bios, etc..hobold2019/08/15 07:10 AM
                          AMD Bios, etc..Anon2019/08/15 04:20 PM
                        AMD Bios, etc..Jan Olšan2019/08/15 08:49 AM
                          AMD Bios, etc..Adrian2019/08/15 09:16 AM
                          AMD Bios, etc..Gro2019/08/15 10:57 AM
                        AMD Bios, etc..David Hess2019/08/16 05:39 AM
      Big gotchas: poor specsAdrian2019/08/10 01:28 PM
      Big gotchas: poor specsDummond D. Slow2019/08/10 01:57 PM
        Big gotchas: poor specsanon22019/08/11 12:33 AM
          Big gotchas: poor specsblue2019/08/11 12:57 AM
          Big gotchas: poor specsAdrian2019/08/11 05:41 AM
            Big gotchas: poor specsaaron spink2019/08/12 09:45 AM
              Big gotchas: poor specsFoo_2019/08/12 11:02 AM
              Big gotchas: poor specsTravis Downs2019/08/12 11:26 AM
                Big gotchas: poor specsGabriele Svelto2019/08/13 09:48 AM
                Big gotchas: poor specsaaron spink2019/08/13 07:23 PM
                  Big gotchas: poor specsDoug S2019/08/13 11:15 PM
                    Big gotchas: poor specsGian-Carlo Pascutto2019/08/14 01:35 AM
                    Big gotchas: poor specsaaron spink2019/08/15 05:16 PM
                      Big gotchas: poor specsJouni Osmala2019/08/15 09:03 PM
                        Big gotchas: poor specsaaron spink2019/08/19 04:05 AM
                          Big gotchas: poor specsMichael S2019/08/19 04:37 AM
                            Big gotchas: poor specsRicardo B2019/08/19 05:40 PM
                              Big gotchas: poor specsAaron Spink2019/08/25 02:29 AM
              Big gotchas: poor specsAdrian2019/08/12 11:31 AM
              Big gotchas: poor specsJukka Larja2019/08/13 07:37 AM
              Big gotchas: poor specsLinus Torvalds2019/08/13 11:31 AM
          Big gotchas: poor specsDummond D. Slow2019/08/11 06:23 AM
      FX-9590 > i7-9700KGian-Carlo Pascutto2019/08/12 10:37 AM
    RDRAND issueanonymou52019/08/10 02:52 PM
      RDRAND issueLinus Torvalds2019/08/10 04:15 PM
        RDRAND issueGionatan Danti2019/08/11 01:35 AM
          RDRAND issueLinus Torvalds2019/08/11 10:43 AM
            RDRAND issueLinus Torvalds2019/08/11 11:05 AM
              RDRAND issue@never_released2019/08/11 11:10 AM
                RDRAND issueLinus Torvalds2019/08/11 01:13 PM
                  Err....Groo2019/08/11 06:47 PM
                    Err.... This is a zero content fud posteye roll2019/08/11 08:48 PM
                    Err....Brendan2019/08/11 08:50 PM
                    Err....Jukka Larja2019/08/12 07:38 AM
                  RDRAND issueJose2019/08/12 02:33 AM
              RDRAND issueGionatan Danti2019/08/11 02:12 PM
            RDRAND issueaaron spink2019/08/12 09:18 AM
      RDRAND issuename2019/08/11 09:35 AM
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