Hi All, I have recently installed CentOS 6.3 with QEMU+KVM for Virtualization. I have successfully created a Windows 2003 VM with 4GB of RAM. The host server is an HP ML350 G8 with 24GB RAM and 24 cores. Details of one of the cores is shown below: processor : 23 vendor_id : GenuineIntel cpu family : 6 model : 45 model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz stepping : 7 cpu MHz : 1200.000 cache size : 15360 KB physical id : 1 siblings : 12 core id : 5 cpu cores : 6 apicid : 43 initial apicid : 43 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 3989.86 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: On an otherwise completely idle system I've noticed the load to be 1.0 to 1.5 range. Running "top" shows the culprit to be: qemu-kvm. Is this normal behavior? I would have expected the load to be pretty light. Stopping the VM restores the load to normal once again. Is there anything I can do to reduce the load? Shawn
Shawn, ----- Original Message -----> On an otherwise completely idle system I've noticed the load to be > 1.0 to 1.5 range. Running "top" shows the culprit to be: qemu-kvm. > > Is this normal behavior? I would have expected the load to be pretty > light.You have to remember, or at least as I understand it, that a load of 1 is full for a single CPU/core. Since you have 24, a full load would be 24. Linux gets even weirder with more cores. I have one system that has 64 cores... and it has a lot of threads/process running just to support those. Another thing that uses quite a bit of CPU is ksm. If you don't have a number of similar VMs then I don't think it is very helpful... and it seems to eat up quite a bit of CPU resources trying to be helpful. Ok, now the uber-CentOS geeks can tell me how stupid I am. Mmmm... go. TYL, -- Scott Dowdle 704 Church Street Belgrade, MT 59714 (406)388-0827 [home] (406)994-3931 [work]
About the only thing you can do is not run Windows, or at least that version, XP does the same thing, continuouslys spins the CPU when there aren't any user processes using time. I've heard this is resolved in Windows-7 but haven't tried it personally. -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874. On Fri, 7 Dec 2012, Shawn Everett wrote:> Date: Fri, 7 Dec 2012 12:02:14 -0800 > From: Shawn Everett <shawn at tandac.com> > Reply-To: Discussion about the virtualization on CentOS<centos-virt at centos.org>> To: centos-virt at centos.org > Subject: [CentOS-virt] (no subject) > > Hi All, > > I have recently installed CentOS 6.3 with QEMU+KVM for Virtualization. > > I have successfully created a Windows 2003 VM with 4GB of RAM. The host > server is an HP ML350 G8 with 24GB RAM and 24 cores. Details of one of > the cores is shown below: > > processor : 23 > vendor_id : GenuineIntel > cpu family : 6 > model : 45 > model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz > stepping : 7 > cpu MHz : 1200.000 > cache size : 15360 KB > physical id : 1 > siblings : 12 > core id : 5 > cpu cores : 6 > apicid : 43 > initial apicid : 43 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx > pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology > nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 > ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm > ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid > bogomips : 3989.86 > clflush size : 64 > cache_alignment : 64 > address sizes : 46 bits physical, 48 bits virtual > power management: > > On an otherwise completely idle system I've noticed the load to be 1.0 to > 1.5 range. Running "top" shows the culprit to be: qemu-kvm. > > Is this normal behavior? I would have expected the load to be pretty light. > > Stopping the VM restores the load to normal once again. > > Is there anything I can do to reduce the load? > > Shawn > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt >
Hi All, I have recently installed CentOS 6.3 with QEMU+KVM for Virtualization. I have successfully created a Windows 2003 VM with 4GB of RAM. The host server is an HP ML350 G8 with 24GB RAM and 24 cores. Details of one of the cores is shown below: processor : 23 vendor_id : GenuineIntel cpu family : 6 model : 45 model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz stepping : 7 cpu MHz : 1200.000 cache size : 15360 KB physical id : 1 siblings : 12 core id : 5 cpu cores : 6 apicid : 43 initial apicid : 43 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 3989.86 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: On an otherwise completely idle system I've noticed the load to be 1.0 to 1.5 range. Running "top" shows the culprit to be: qemu-kvm. Is this normal behavior? I would have expected the load to be pretty light. Stopping the VM restores the load to normal once again. Is there anything I can do to reduce the load? Shawn