On Tue, 17 Jan 2006, Dave Jones wrote:
On Tue, Jan 17, 2006 at 10:29:29AM -0800, Nathan Grennan wrote:
> I disagree, I suspect there are still a lot more non-dual/ht systems
> out there. I just upgraded to dual core A64. They come at quite a
> premium. It also isn't like a ton of S754 systems and S939 single core
> systems haven't been sold. I will give you that there are a fair number
> of HT systems out there, but again they are only on the higher end
> versions of the processor. In addition may people disable HT worse
> performance under certain workloads.
The spinlock operations are almost free on AMD on UP. They did some real
magic in their cores to make locked operations really fast compared to Netburst.
Intel however haven't shipped *any* UP x86-64's. Even the first ones
they shipped were HT capable.
Is this 100% true for all x86_64 including first gen opterons?
-Dan
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