KNL obsolete, AVX512 - a huge mistake

By: juanrga (nospam.delete@this.juanrga.com), August 26, 2015 11:23 am
Room: Moderated Discussions
Alberto (git.delete@this.git.it) on August 26, 2015 6:26 am wrote:
> juanrga (nospam.delete@this.juanrga.com) on August 26, 2015 5:49 am wrote:
> > Anon (nope.delete@this.nope.com) on August 26, 2015 1:23 am wrote:
> > > juanrga (nospam.delete@this.juanrga.com) on August 25, 2015 6:01 pm wrote:
> > > > Nvidia talk at ISC2015 was much more interesting. They compared
> > > > two KNL CPUs against Power+CUDA using Amdahl's
> > > > law. At 98% parallel the KNL was competitive. At 90% parallel
> > > > work the KNL system was about two times slower than
> > > > the Power+CUDA system: ~2 min vs 4.5 min. At 70% parallel work, the KNL system was more than 3x slower.
> > > >
> > > > Wider vector units and less cores had worked better.
> > >
> > > KNL will still be available as a PCIe card- SKX & KNL combo systems
> > > are entirely feasible, for workloads that fit that paradigm.
> >
> > The card version is for legacy customers. New systems will favor the CPU version.
> > Nvidia was comparing Summit and Aurora configurations and how Aurora will require
> > one order of magnitude more nodes to achieve similar performance.
>
> Even the Host version of KNL can be paired with Xeons in the node :),

Sure, and then you come with an inefficient system that goes against the philosophy of the self-boot approach. Moreover, I am not sure if the increased single thread performance will compensate for the interconnect penalty.

> Skylake
> Xeon and hopefully even Broadwell Xeon will have the right dedicated fabric.
> Why to rise the node number??
>
>

< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
KNL obsolete, AVX512 - a huge mistakeMichael S2015/08/25 02:58 PM
  KNL obsolete, AVX512 - a huge mistakeMark Roulo2015/08/25 04:10 PM
    KNL obsolete, AVX512 - a huge mistakeMichael S2015/08/25 04:23 PM
  KNL obsolete, AVX512 - a huge mistakejuanrga2015/08/25 06:01 PM
    KNL obsolete, AVX512 - a huge mistakeAnon2015/08/26 01:23 AM
      KNL obsolete, AVX512 - a huge mistakejuanrga2015/08/26 05:49 AM
        KNL obsolete, AVX512 - a huge mistakeAlberto2015/08/26 06:26 AM
          KNL obsolete, AVX512 - a huge mistakejuanrga2015/08/26 11:23 AM
            KNL obsolete, AVX512 - a huge mistakeAlberto2015/08/26 01:13 PM
    KNL obsolete, AVX512 - a huge mistakeAaron Spink2015/08/26 07:25 AM
      KNL obsolete, AVX512 - a huge mistakejuanrga2015/08/26 12:11 PM
  Core M vs Atom- well duhAnon2015/08/26 01:19 AM
    Core M vs Atom- well duhMichael S2015/08/26 02:59 AM
      Core M vs Atom- well duhAnon2015/08/26 03:37 AM
  KNL obsolete, AVX512 - a huge mistakebakaneko2015/08/26 03:44 AM
    KNL obsolete, AVX512 - a huge mistakeMichael S2015/08/26 04:23 AM
      KNL obsolete, AVX512 - a huge mistakebakaneko2015/08/26 05:01 AM
        KNL obsolete, AVX512 - a huge mistakeMichael S2015/08/26 05:13 AM
          KNL obsolete, AVX512 - a huge mistakebakaneko2015/08/26 06:00 AM
      KNL obsolete, AVX512 - a huge mistakeNoSpammer2015/08/26 06:33 AM
        KNL obsolete, AVX512 - a huge mistakeMichael S2015/08/26 06:43 AM
  KNL obsolete, AVX512 - a huge mistakempx2015/08/31 03:15 AM
  KNL obsolete, AVX512 - a huge mistakePassing Through2018/08/03 11:02 AM
  KNL obsolete, AVX512 - a huge mistakecoppice2018/08/04 04:34 AM
    KNL obsolete, AVX512 - a huge mistakePassing Through2018/08/04 06:58 AM
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