On Tue, Sep 13, 2005 at 08:15:56PM -0400, michael chang wrote: > On 9/13/05, Santanu Das <[EMAIL PROTECTED]> wrote: > > michael chang wrote: > > > > >Oh, I must have misread your statement. These dual-cpu nodes... what > > >kind of CPUs do they use? How many CPUs does the OS _think_ there > > >are? i.e. are they dual-core CPUs or something? > > > > > > > > Those are all 2.8 Xenon processors; are they dual-core CPUs??. I'm > > running SL3 and it thinks there are 4 CPUs on every node. > > I don't know about Xenon processors, but I do know that Intel Xeon > processors come in a Dual-Core _flavour_ (meaning that each "CPU" may > or may not have multiple "CPUs" in them (technically, they're "cores" > but anyways...)). > > AFAIK, In a Dual Core CPU, it still has to give each core a CPU ID or > otherwise I'm not sure how the OS is supposed to handle it.
Dual-core cpus come with the same it set as Hyperthreaded CPU (so that licensing that was fixed for HTT continues to work), but they add another bit saying that they aren't actually virtual cores. An integer model of CPU counts is extremely close to worthless these days. -- Brooks -- Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4
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