AMD server CPUs capture highest market share gains from Intel in 15 years

Re:AMD server CPUs capture highest market share gains from I... by reacharavindh on Monday May 10, 2021 @04:34AM (#27103880)

I don’t know why this insane rule of thumb still exists in the HPC world. True that some compute bound jobs that are not designed to make use of HT will be hurt by running in an HT environment. But, not all of HPC work is such purely compute bound. For a scientific field, it is ironic that someone perpetrates this blind rule. Do an A/B test with and without HT for your workload in hand and decide based on results…..

As an example, in our test suite, we found that we get almost a 80% boost by turning on HT.

The right rule is “HT may help or hurt your performance depending on workload. Test and decide”.

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Re:AMD server CPUs capture highest market share gains from I... by physicsguy on Monday May 10, 2021 @11:05AM (#27106720)

Well, it's not such a bad idea for most cluster admins (me being one at a large UK University). Most of our compute time comes from a small number of very popular MPI parallelised applications, all of which suffer from worse (or at best equivalent) performance with hyperthreading.

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Re:AMD server CPUs capture highest market share gains from I... by the-dude on Monday May 10, 2021 @04:58AM (#27104017)

Why is this a A/B test and not a regular test?

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