On Tuesday 04 October 2005 09:24, Roy Souther wrote: > Anyone running Intel Xeon's with Hyper-Threading? Does each CPU show up > as a dual core?
The hyperthreaded cores *appear* to be dual cores, (ie there are two CPUs listed in /proc/cpuinfo) but this is in fact different from Dual Core. Hyperthreading is not the same as Dual core. Dual Core is basically two physically complete processors, while HT is still a single processor. > I was doing some admin on a system last month and it had two CPU's with > two cores each. Or at least that is what Linux showed in top and proc. > I did not look closely at the CPU info. I want to get a spec on building > a quad core system like that and can only find dual Intel motherboards > that use Xeon CPU's not the Intel Pentium D's. > > Is anyone running a Xeon with HT? How well does it perform? What would > CLUG'ers recommend. It performs quite well. Subjective estimate is that we gain 15-30% We also have Pentium Ds (dual core) mostly running CAD on windows, but under a brief linux test run they did well. We also have a dual core Opteron (from HP) that simply flies. > > I am building an LTSP server to host about 50 KDE desktops with > OpenOffice running all the time. I want quad core and 4GB RAM. Quad core? I don't think those have been released yet. Are you referring to 4-way SMP (2 x Dual core in this case)? Also, have you considered NXDesktop? They seem to have a more efficient implementation (we have 10 full on desktop users on a standard desktop machine in testing). We are using the freeNX open source package, but the commercial variant has some neat management tools and is inexpensive. FYI, I am in no way affiliated with nomachine/NX, other than as a paying client. If you go the AMD route, I would start with a 32bit distro, I have a Turion64 in my laptop until the AMD64 stuff matures (3rd party driver and software is the weakness, especially on my ATI IGP laptop). Cheers > > Royce Souther > www.SiliconTao.com > Let Open Source help your business move beyond. > > For security this message is digitally authenticated by GnuPG.
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