AVX2 and AVX-512 frequencies for W-2014

By: Travis (travis.downs.delete@this.gmail.com), August 16, 2018 9:09 am
Room: Moderated Discussions
Jeff S. (fakity.delete@this.fake.com) on August 16, 2018 6:19 am wrote:
> AFAIK, you still have to do a heuristic from the APERF/MPERF register for lack of a direct queryable
> register. See: kernel patch for active MHz calculation Just making the system call might be
> good enough for your purposes, since the AVX downclock window lasts like a full ms.

Right, or I could use turbostat to monitor this directly while running some AVX code (Len maintains turbostat).


> The AVX turbo offsets should be visible in BIOS, so you may not need to try
> dynamic measurements if you are just looking for the static turbo clock ranges
> and not what is actually achieved dynamically in the face of power limits.

Yeah this is what I was actually after: the "written on the box" (not) nominal AVX2 and AVX-512 frequencies. This info has been released for almost every AVX-512 chip except the W-2104 and W-2102 and some not available at retail chips like EC2's Xeon 8175.

I am also interested in the actual observed frequency, but in this case I don't expect it to deviate much from the ideal.

Unfortunately, I can't easily access the BIOS on this box.
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
AVX2 and AVX-512 frequencies for W-2014Travis2018/08/14 08:37 PM
  Should say W-2104 (NT)Travis2018/08/14 08:50 PM
  AVX2 and AVX-512 frequencies for W-2014Adrian2018/08/15 12:17 AM
    AVX2 and AVX-512 frequencies for W-2014Travis2018/08/15 12:52 PM
      AVX2 and AVX-512 frequencies for W-2014Jeff S.2018/08/16 06:19 AM
        AVX2 and AVX-512 frequencies for W-2014Travis2018/08/16 09:09 AM
        AVX2 and AVX-512 frequencies for W-2014Travis2018/08/23 11:25 PM
      AVX2 and AVX-512 frequencies for W-2014Adrian2018/08/16 11:31 PM
        AVX2 and AVX-512 frequencies for W-2014Travis Downs2018/08/17 08:16 AM
          AVX2 and AVX-512 frequencies for W-2014Adrian2018/08/17 10:29 AM
            AVX2 and AVX-512 frequencies for W-2014Travis2018/08/19 11:40 AM
    AVX2 and AVX-512 frequencies for W-2104Travis2018/08/23 10:49 PM
      AVX2 and AVX-512 frequencies for W-2104Adrian2018/08/24 02:32 AM
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