How to disable hyper-threading in Gigabyte BRIX Pro "GB-BXi7-4770R"??

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gamerk316
Well, the Windows scheduler will use the HTT cores if all the other cores are busy doing work, which will happen whenever a kernel thread bumps your application. And if your thread stays on a HTT core for an extended period, it could be enough to cause a minor performance hit. That's a fringe case though, and I'd imagine clock speed effects are a bigger problem.

In the short term, you can bind your application to only use even numbered cores, which should eliminate HTT effects for the purposes of testing.
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narenv68

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Karsten75

Karsten75

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You won't take a hit. The scheduling will not make such dumb mistakes. Don't mess with things like disabling hyper-threading.
 
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narenv68

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If the scheduler won't do that mistake, then what might me the other reason for the performance hit. The same code executed on the intel i5 is more efficient when compared to running on i7.
 
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Karsten75

Karsten75

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If you want a specific answer, post more details. Post the two configurations you are comparing, processor models, RAM and other devices, as well as what software you are testing. Provide details of the performance difference you observed and how you measured.

Performance testing is a bitch to get right. casual observations are only good in instances where there's a 20-30% difference in performance.
 
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gamerk316

gamerk316

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Jul 8, 2008
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Well, the Windows scheduler will use the HTT cores if all the other cores are busy doing work, which will happen whenever a kernel thread bumps your application. And if your thread stays on a HTT core for an extended period, it could be enough to cause a minor performance hit. That's a fringe case though, and I'd imagine clock speed effects are a bigger problem.

In the short term, you can bind your application to only use even numbered cores, which should eliminate HTT effects for the purposes of testing.
 
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