[gmx-developers] GROMACS performance on Opteron Dual Core processors!
k_jahanbakhsh at yahoo.com
Sat Oct 7 10:42:54 CEST 2006
David van der Spoel <spoel at xray.bmc.uu.se> wrote: Kazem Jahanbakhsh wrote:
> Dear Christian,
> I have confused with your description. I have some simple
> questions now, first is what does "Opteron-DC" stand for?
> Doesn't it mean "Dual-Core Opteron"? You stated that "N"
> column in the benchmark table means number of cores and not
> the processors. I don't realize this at all. In the
> presented benchmark table for single processors they brought
> the results of "Opteron" processors with N=2 and N=4, if we
> consider the "N" value as the number of cores on one
> hardware chip, this does not match with the the Opteron
> processors that exist in single core architecture in the
> real world. I can't understand this contradiction in any
> way. Also in that table they showed the performance outputs
> of "Opteron-DC" processors with N=2 and N=4. This results
> doesn't mean if we consider the "N" as the number of cores
> per chip because in the market the "Dual-Core Opteron"
> processors only exist in dual core
> structure and AMD doesn't
> bring the Quad-Core processors into the market. for this
> reason I cant interpret the "N" number as the number of
> cores on single processor. Please clarify me with this
David van der Spoel wrote:
> Sorry for the confusion. N is the number of cores, so N is 1 for an old
>opteron, if N is 4 it means 2 dual-core chips. One new core is faster than >one old opteron.
Thanks for your attention. I didn't find out what does "Opteron-DC" stand for? Please tell me what is the differences between the "Opteron" processor types with N=2 or N=4 and "Opteron-DC" processor types with similar number of cores (N=2 or 4) which you have brought in your single processor benchmarks. Can you tell me some examples from the real AMD chipset models that exists in the market today?
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