On Tue, Jan 17, 2006 at 08:09:18PM +0100, Thorsten Leemhuis 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. > > Sorry, but I have to disagree: Most newer Celerons have x86-64 these > days, too (since June or July iirc). And those are UP/have no HT... See > http://www.intel.com/products/processor/celeron_D/index.htm Excellent point. These are probably going to see the most benefit from the LOCK->NOP runtime conversion when that goes in, though the vast majority of users will never notice any difference. Dave -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list