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Hyperthreading question.

Deders

Deders

Platinum Member
If a program is using 100% of a hyperthreaded core, but 0% of its related actual core, does this mean it has access to 100% of the core and will be running at full performance?
 
Deders said:
If a program is using 100% of a hyperthreaded core, but 0% of its related actual core, does this mean it has access to 100% of the core and will be running at full performance?
Click to expand...
If you completely disable HT you might see a difference in performance, since part of CPU resources are reserved for handling HT (or at least that used to be the case for instance on Nehalem where the ROB was split when HT is enabled).
 
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