Gold 6130 results

By: Travis (travis.downs.delete@this.gmail.com), August 24, 2018 10:02 pm
Room: Moderated Discussions
-.- (blarg.delete@this.mailinator.com) on August 24, 2018 9:08 pm wrote:

> The link to the results is dead, but how much of a role does the motherboard play? On Core-X
> at least, the AVX frequency offsets are configurable via BIOS. I imagine that this is more
> restricted on Xeon, but presumably the motherboard still plays a role there.

It works for me. What link are you using? This is the link I see. It will perhaps open outside of your browser or show in "Downloads" as it is a txt file.

Good point about configurable AVX offsets. I don't know how this machine is configured (more results welcome!).


> Trying your tool, one thing I notice is that the the AVX frequencies aren't different on
> 'favored' cores. For this 7820X running at stock frequencies, running 1 thread on a non-favored
> core, I get 4.3/3.8/3.6 GHz, whilst on a favored core, I get 4.5/3.8/3.6 GHz.

Yeah it could be that favored status doesn't apply to AVX (which itself would be an interesting finding). Perhaps the limits for AVX code (e.g., heat, current) are different than for what limits scalar code so binning a favored core doesn't let you increase AVX speed.

> Note that
> I'm running this using the --no-pin option, and pinning via taskset instead. I do get some
> weirdness when trying more than one thread being pinned on different cores.

You mean you get weirdness when you use --no-pin and then use taskset to pin to 2 cores and run a 2 threaded test? Yeah that won't always work well (it particular if any thread migrations happen you'll get wrong answers for some of the columns since they are reading free running counters that will vary across cores).

The solution is just to fix avx-turbo so that it looks at the affinity for the process when deciding what cores to run on, then you could taskset outside and it would work fine. Here's the issue.

< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
AVX-512 downclocking not as bad as thought?Travis2018/08/24 12:01 AM
  AVX-512 downclocking not as bad as thought?Ricardo B2018/08/24 04:22 AM
    AVX-512 downclocking not as bad as thought?David Hess2018/08/24 09:08 PM
      AVX-512 downclocking not as bad as thought?Travis2018/08/24 09:54 PM
        AVX-512 downclocking not as bad as thought?anon2018/08/25 04:06 AM
          AVX-512 downclocking not as bad as thought?Travis2018/08/25 07:34 PM
        AVX-512 downclocking not as bad as thought?David Hess2018/08/25 09:44 AM
          AVX-512 downclocking not as bad as thought?Travis2018/08/25 07:35 PM
  AVX-512 downclocking not as bad as thought?Jeff S.2018/08/24 06:22 AM
    AVX-512 downclocking not as bad as thought?Travis2018/08/24 07:41 AM
      AVX-512 downclocking not as bad as thought?Jeff S.2018/08/24 09:24 AM
  AVX-512 downclocking not as bad as thought?Maynard Handley2018/08/24 11:03 AM
    AVX-512 downclocking not as bad as thought?Jeff S.2018/08/24 11:24 AM
      AVX-512 downclocking not as bad as thought?Maynard Handley2018/08/24 12:26 PM
        AVX-512 downclocking not as bad as thought?Jeff S.2018/08/24 12:39 PM
        AVX-512 downclocking not as bad as thought?megabytephreak2018/08/24 12:43 PM
          AVX-512 downclocking not as bad as thought?Maynard Handley2018/08/24 03:59 PM
          AVX-512 downclocking not as bad as thought?someone2018/09/12 12:20 AM
            AVX-512 downclocking not as bad as thought?anonymou52018/09/12 06:39 AM
        AVX-512 downclocking not as bad as thought?Travis2018/08/24 02:48 PM
    AVX-512 downclocking not as bad as thought?David Hess2018/08/24 09:26 PM
  Gold 6130 resultsTravis2018/08/24 03:49 PM
    Gold 6130 results-.-2018/08/24 08:08 PM
      Gold 6130 resultsTravis2018/08/24 10:02 PM
        Gold 6130 results-.-2018/08/25 02:27 AM
          Gold 6130 resultsTravis2018/08/25 07:37 PM
  AVX-512 downclocking not as bad as thought?Adrian2018/08/24 08:30 PM
    AVX-512 downclocking not as bad as thought?Adrian2018/08/24 08:36 PM
      AVX-512 downclocking not as bad as thought?Adrian2018/08/24 08:39 PM
        AVX-512 downclocking not as bad as thought?Travis2018/08/24 10:06 PM
          AVX-512 downclocking not as bad as thought?Adrian2018/08/24 10:28 PM
  AVX-512 downclocking not as bad as thought?Royi2018/08/25 03:36 AM
    AVX-512 downclocking not as bad as thought?Travis Downs2018/08/25 08:18 AM
      AVX-512 possibly in its own clock domain?Brett2018/08/25 12:58 PM
        AVX-512 possibly in its own clock domain?Travis2018/08/25 07:40 PM
          AVX-512 possibly in its own clock domain?Brett2018/08/26 08:48 AM
            AVX-512 possibly in its own clock domain?Maynard Handley2018/08/26 04:28 PM
              AVX-512 possibly in its own clock domain?none2018/08/26 08:40 PM
                AVX-512 possibly in its own clock domain?Maynard Handley2018/08/27 09:37 AM
                  AVX-512 possibly in its own clock domain?none2018/08/27 10:28 AM
        AVX-512 possibly in its own clock domain?David Hess2018/08/26 09:20 AM
          AVX-512 possibly in its own clock domain?Maynard Handley2018/08/26 04:35 PM
            AVX-512 possibly in its own clock domain?Gabriele Svelto2018/08/27 12:46 PM
            AVX-512 possibly in its own clock domain?David Hess2018/08/27 06:03 PM
  AVX-512 downclocking not as bad as thought?Travis2018/09/07 07:32 PM
    AVX-512 downclocking not as bad as thought?anonymou52018/09/07 08:03 PM
      AVX-512 downclocking not as bad as thought?Travis2018/09/09 07:16 PM
    AVX-512 downclocking not as bad as thought?Tim McCaffrey2018/09/08 07:55 AM
      AVX-512 downclocking not as bad as thought?Travis Downs2018/09/08 02:21 PM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell avocado?