Interesting discussion about a Intel Skylake performance regression with the PAUSE instruction

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Interesting discussion about a Intel Skylake performance regression with the PAUSE instruction

Bruce O'Neel-2
 
Skylake takes PAUSE about 10 times more seriously then did previous Intel CPUs.  Surprises happen..



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Re: Interesting discussion about a Intel Skylake performance regression with the PAUSE instruction

marcel.taeumel
 
Hmm... does the OSVM do any spin-wait tricks to avoid context switches?

Best,
Marcel

Am 13.06.2020 09:18:26 schrieb Bruce O'Neel <[hidden email]>:


Skylake takes PAUSE about 10 times more seriously then did previous Intel CPUs.  Surprises happen..

[https://aloiskraus.wordpress.com/2018/06/16/why-skylakex-cpus-are-sometimes-50-slower-how-intel-has-broken-existing-code/](https://aloiskraus.wordpress.com/2018/06/16/why-skylakex-cpus-are-sometimes-50-slower-how-intel-has-broken-existing-code/)




Skylake takes PAUSE about 10 times more seriously then did previous Intel CPUs.  Surprises happen..