<pre>Dear Christian,<br><br>I have confused with your description. I have some simple <br>questions now, first is what does "Opteron-DC" stand for? <br>Doesn't it mean "Dual-Core Opteron"? You stated that "N" <br>column in the benchmark table means number of cores and not <br>the processors. I don't realize this at all. In the <br>presented benchmark table for single processors they brought<br>the results of "Opteron" processors with N=2 and N=4, if we<br>consider the "N" value as the number of cores on one <br>hardware chip, this does not match with the the Opteron <br>processors that exist in single core architecture in the <br>real world. I can't understand this contradiction in any <br>way. Also in that table they showed the performance outputs<br>of "Opteron-DC" processors with N=2 and N=4. This results <br>doesn't mean if we consider the "N" as the number of cores <br>per chip because in the market the "Dual-Core Opteron" <br>processors only exist in dual core
structure and AMD doesn't<br>bring the Quad-Core processors into the market. for this <br>reason I cant interpret the "N" number as the number of <br>cores on single processor. Please clarify me with this <br>misunderstanding.<br><br>regards,<br>Jahanbakhsh</pre> <br><br><b><i>Christian Burisch <burisch@bph.rub.de></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> Kazem Jahanbakhsh wrote:<br>> Hi everybody,<br><br>Hi Kazem,<br><br>> Dual Core platform. From your benchmark table we saw that for<br>> single Opteron processor we have a performance about 393<br>> picoseconds of simulation time per day (by Intel 8 compiler) and<br>> for single Opteron-DC we have performance about 450 instead of<br>> ideal expected performance about 2*393 (by gcc 3.4.3 compiler) .<br><br>"N" means number of cores, not processors.<br><br>> According with these results and by considering
cost per<br>> performance ratio it seems that Single-Core architecture is better<br>> than advanced Dual-Core architecture. <br><br>No. Dual core architecture is superior, and as David already pointed <br>out (and as was already posted on this list) the latest Intel Core 2 <br>Duo Xeon 5100 "Woodcrest" seems to beat the Opterons slightly.<br><br>Regards<br><br>Christian<br><br><br>_______________________________________________<br>gmx-developers mailing list<br>gmx-developers@gromacs.org<br>http://www.gromacs.org/mailman/listinfo/gmx-developers<br>Please don't post (un)subscribe requests to the list. Use the <br>www interface or send it to gmx-developers-request@gromacs.org.<br></blockquote><br><p> 
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