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 systems are running at at 1KHz interrupt rate and doing about 20 context switches per second while idle. But as I said, this does not cause the CPU load average to move off of 0.00 on another almost identical machine. Thx, --Bill