Re: [LAU] CPUs for low latency

On Sun, 20 Dec 2015, Ede Wolf wrote:

>> AMD seems to have something similar enough to hyperthreading to be wary
>> of. A number of the AMD CPUs shows twice as many threads as cores. I
>> know that they do double caching, I don't know if this is what the Linux
>> kernel is seeing as shadow cpus or not.
>
> At least for their FX eight core cpus, two cores share one floating point
> unit, so ever since early 80x86SX times, where you could buy a dedicated
> 80x87 FPU, those are not to be considered "full" cores any more. Though ought
> be complete asides the FPU, and therefore a little more "true" than HT.
>
> Not sure however, if that matches your idea of a shadow CPU

I'm not sure either. I have seen the same threads/cores, siblings/cores
difference with both AMD and Intel. Audio DSP in Linux (jack, lv2, etc)
seems to be all floats, so it just might matter yes.

--
Len Ovens
www.ovenwerks.net
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