Downside to disabling Hyperthreading?

[YYR123]

Interesting to say the least.....

[Darryl Ramm]

See how much you reduced the software’s need for CPU by disabling hyperthreading


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[Tim R.]

I'm finding now that Pro Tools crashes (hangs and has to be forced quit) pretty regularly when QUITTING if hyperthreading is disabled though.

[Bob Olhsson]

Each plug-in is really a separate little app that may or may or may not be optimized for hyperthreading. I don't think you can generalize.

[guitardom]

Originally Posted by Darryl Ramm

But up to 30% is probably a good humber to think of, if things are working well. "A large loss" might make people thing that the hypethread cores are the performance of a physical core. And in reality the underlying hardware is not stalled enough for hyperthreading to provide near that much extra boost.

The answer is always so highly software and workload specific that just doing the test is the right thing to do.

30% is is quite a large loss. That is the equivalent of benchmark testing in Pro Tools I have done with say a 6900k 8 core core and dropping it down to not much above the power of a i7 7700k 4 core.

[Darryl Ramm]

Originally Posted by guitardom

30% is is quite a large loss. That is the equivalent of benchmark testing in Pro Tools I have done with say a 6900k 8 core core and dropping it down to not much above the power of a i7 7700k 4 core.

Not disagreeing but I'd rather people think of this as something highly variable that they have to test for themselves. Asking what hypertheading delivers in the abstract, is like asking how long a piece of string is.

[feliponk]

Hyperthreading allows the usage of the "virtual" cores on the CPU, doubling the amount, so unless you want to cut in half the CPU power, leave it on.

Most of the modern code takes advantages of the hyperthreading, especially plugins and video.

[TOM@METRO]

I see stability improvements with Hyperthreading off. Obviously there is a performance hit.

[feliponk]

Originally Posted by TOM@METRO

I see stability improvements with Hyperthreading off. Obviously there is a performance hit.

Really Tom?, only in ProTools or in the other DAWs/NLEs as well?

In Windows I would say HT should be on mandatory, especially for NLEs and DAWs, way more power.

Cheers!

[TOM@METRO]

Originally Posted by feliponk

Really Tom?, only in ProTools or in the other DAWs/NLEs as well?

In Windows I would say HT should be on mandatory, especially for NLEs and DAWs, way more power.

Cheers!

I seem to see fewer 91xx errors with Hyperthreading disabled. This is with Pro Tools HDX and a 6 core i7. I don't think this is a one size fits all issue though. Obviously many do well with Hyperthreading turned on. It may have to do with chosen plug-ins.