--- On Sat, 7/19/08, listmail <listmail@xxxxxxxxxxxxx> wrote:
> From: listmail <listmail@xxxxxxxxxxxxx>
> Subject: Re: Load Average ~0.40 when idle
> To: "CentOS mailing list" <centos@xxxxxxxxxx>
> Date: Saturday, July 19, 2008, 4:27 PM
> On Sat, 19 Jul 2008 16:04:17 -0700 (PDT), Mark Pryor wrote
> > > Replying to my own post as a follow-up. I just
> checked
> > > another machine that
> > > I am burning in with CentOS 5.2, and it has the
> same
> > > problem: load average
> > > ~0.4 when idle. Both of these machines have
> Supermicro
> > > X7DBN motherboards,
> > > but one is running a single quad-core CPU (Intel
> Xeon) and
> > > the other is
> > > running two dual-core CPUs (Intel Xeon). Anyone
> else seeing
> > > anything like
> > > this?
> >
> > Do you have hyper-threading turned on in the bios?
> >
> No, the BIOS does not support hyperthreading.
> > What shows in
> > cat /proc/cpuinfo
> >
> This is an example for one of the four CPUS - they are all
> the same
> except for the processor number:
> ===
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 6
> model : 15
> model name : Intel(R) Xeon(R) CPU 5130 @
> 2.00GHz
> stepping : 6
> cpu MHz : 2000.191
> cache size : 4096 KB
> physical id : 0
> siblings : 2
> core id : 0
> cpu cores : 2
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 10
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic
> sep mtrr pge mca
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
> pbe nx lm
> constant_tsc pni monitor ds_cpl vmx tm2 cx16 xtpr lahf_lm
> bogomips : 4001.80
> ===
> >
> > do you have 2 virtual CPU's per core?
> >
> Nope.
>
the ht flag means the cpu supports hyperthreading
lm means that you can run 64 bit.
By the way, is it an i386 kernel?
I've seen only one SuperMicro bios and it was quite complex. Are you sure
that there is no way to toggle hyperthreading in the bios?
the siblings flag in cpuinfo says 2, which I thought means 2 virtual cpu's.
I doubt if any of the above is relevant to your problem, but if you reinstall anytime soon you might want to consider these support flags in how you set things up.
--
Mark
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