Bill Wheatley wrote: > :) I've had the fun of getting to see a Hammer in access. Friend works for > AMD so i have a few perks lol.
Single processor or multiprocessor? > Even on benchmarks it looks like the AMD chips are at parity with the new > INTEL 64 bit line. > And in time i'm sure AMD 64bit chips will improve and provide a much better > solution then the intel chips. I am not so sure about that. All benchmarks I have seen are for single processor machines. Performance gains are easy to achieve there due to the integration of the northbridge and the processor, which reduces the latency for memory access significantly because there is no need to access another subsystem through a link of limited capacity. And I believe a significant part of the performance improvements over Athlons is due to this reduced latency. For multiprocessor machines however, this advantage is significantly less. Because in for instance an 8-way machine, only 1/8 of the memory is accessible directly from a certain CPU, for the rest the CPU has to talk to another CPU which can access the memory. So the latency of talking over link with limited capacity is re-introduced here. I would not be surprised if the performance gain from going from 1 to 2 processors (up to 100% on traditional SMP machines) is significantly less on this located memory architecture. And a large part of the success will depend on the availability of NUMA drivers that will be able to bind certain processes to a certain CPU, even if that CPU is already lightly used and another one is completely free. Jochem ______________________________________________________________________ Get the mailserver that powers this list at http://www.coolfusion.com Archives: http://www.mail-archive.com/cf-community@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
