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Author Topic: Activate Hyper-Threading (or not)?  (Read 4732 times)

phoenix

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Activate Hyper-Threading (or not)?
« on: June 02, 2016, 03:06:14 pm »
I've recently installed OPNsense on a new piece of kit that has a dual core i7-4560u processor and hyper-threading. I've read various posts/threads/blogs on the internet (mostly older ones) that advise against using hyper-threading but they've been mostly in relation to running freeBSD in a VM, there have also been some comments that it doesn't make any difference whether it's activated or not - what's the current thoughts on this? FWIW, I do have it activated and there seems to be no problems that I can see, the system is lightly loaded and download/upload speeds seem good. I do have a m inor niggle with the onboard NICs but that's for another thread. :)
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Bill

weust

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Re: Activate Hyper-Threading (or not)?
« Reply #1 on: June 03, 2016, 05:44:59 pm »
That information is indeed very old.
As far as I know the old information is no longer valid.

As an example: with Hyper-V 2008 you didn't want HT enabled. With 2008 R2 it was fixed, and I never experienced any problems in the 3 or 4 years that ran it.
Of course, FreeBSD being FreeBSD and not exactly fast when it comes to current hardware, this might differ.
But I really doubt it would still be an issue.
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phoenix

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Re: Activate Hyper-Threading (or not)?
« Reply #2 on: June 03, 2016, 06:28:14 pm »
Thanks for your reply. Some of the information was only about 18 months old, hence my question here. I do have hyper-threading enabled on this hardware and I did when I was using pfsense and more recently OPNsense in a VM and didn't see any problems with either of those. In the short time I've been running this new hardware there's nothing untoward happening but I do like some confirmation once in a while. :)

Thanks again.
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Bill

weust

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Re: Activate Hyper-Threading (or not)?
« Reply #3 on: June 03, 2016, 08:54:26 pm »
You're welcome 🙂
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