>>>>> On Wed, 30 Apr 2003 18:17:45 +0200, "Adriano Galano" <adriano@satec.es> said: Adriano> We need to find some reference of SMP scalability on Linux Adriano> scheduler. For 1, 2, 4 and 8 processor. How "lineal" is Adriano> this scalability? Does Linux perform well en 4 or 8 Itanium Adriano> 2 architecture? There is no single answer to the scalability question. It totally depends on what application you're running. SGI has shown that certain apps scale very nicely all the way to 64 CPUs on their Altix box. Kernel-intensive apps won't scale that far, but even there there is some evendice of very nice scaling. AFAIK, there is only a 4-way TPC-C number published for Linux: rx5670 (4-way 1GHz Itanium 2): 80494 tpmC but the URL here: http://www.hp.com/products1/itanium/performance/commercial/tpcc.html shows a TPC of about 40600 for a 2-way machine (I believe it was running Windows). Given that the 4-way TPC-C number for Windows is in the same 80k ballpark, it suggests that Linux scales almost linearly for TPC-C. Adriano> Somebody have experience of Linux scalability for more than Adriano> 4 Itanium 2 (or Madison) processors? NEC and SGI already are shipping large Itanium 2 machines. Not sure what benchmarks have been run on them with Linux, though. As far as HP machines are concerned: it's probably best to get in touch with a sales rep. He or she should be able to get you more info on forthcoming machines and perhaps could help you get the application benchmarked. --davidReceived on Wed Apr 30 10:34:57 2003
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