AVX2 and AVX-512 frequencies for W-2014

By: Travis (travis.downs.delete@this.gmail.com), August 15, 2018 12:52 pm
Room: Moderated Discussions
Adrian (a.delete@this.acm.org) on August 15, 2018 12:17 am wrote:

> You have probably seen that Anandtech has just published all the
> turbo frequencies for most Xeon W models, but not for this one.

Yes, they excluded the non-turbo models W-2104 and W-2102, unfortunately. They also don't make it clear where they sourced their info (since I'd like to go to the source if it is public).

> I have no idea which are the frequencies for W-2104, but a reasonable
> supposition would be 3.0 GHz for AVX2 and 2.8 GHz for AVX-512.
>
> For an only 4-core processor, it is very unlikely that lower frequencies would be needed.
>
>
> Another likely possibility is that it matches the behavior of W-2123. In that case
> the AVX-512 and AVX2 frequencies would be the same, but 3.1 GHz would be the 2-core
> AVX2/-512 frequency and 3.0 GHz would be the 4-core AVX2/-512 frequency.

Right. I don't think there is any physical limitation here: if W-2123 can do 3.5/3.5/3.4/3.4, the very similar W-2104 could perhaps just do it's base frequency of 3.2 in all modes, no matter how many active cores. It is just a matter of how Intel wanted to segment it.

Is anyone aware of any out-of-the box thing to either measure this or read the frequency from MSRs (I forget if these modes are both exposed, I think so though).
< 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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