Re: methods of hyperthreading on or off

On Mon, Apr 21, 2025 at 10:06:28PM +0300, Konstantin Belousov wrote:
>I believe that at least on some CPUs the partition of the execution resources
>is static.  So even if OS does not init the dormant hyperthreading cores, it
>might consume resources which are then not available to running threads.
>
>Then disabling the threads by a magic MSR would give all resources to the
>only one thread.  Note that this is a speculation.
>

The processors are 2x xenon E5-2690. I'll try disabling HT in the bios.
That'll be another plus if it frees up resources, no matter how small. 
I'm only concerned with network throughput. I can't think of anything
server side benefitting from HT. Thanks for the tip.
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