<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I was running XP installed directly onto the CentOS 6.3 guest, and two problems occurred: 1) the guest ran like a dog, and 2) the host ran as many cores at 100% as I had cores in the guest. </div><div><br></div><div>Both problems were fixed by loading the virtio drivers for disk and network.<br><br><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">Yours,</span></div><div><br></div><div>Clint Redwood </div><div><br></div><div>Screwtape Limited, Registered 06663232, Babington House, 26 College Road, <span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">Chilwell, Nottingham NG9 4AS</span></div></div><div><br>On 8 Dec 2012, at 17:20, SilverTip257 <<a href="mailto:silvertip257@gmail.com">silvertip257@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div>On Sat, Dec 8, 2012 at 12:48 AM, Zoltan Frombach <span dir="ltr"><<a href="mailto:zoltan@frombach.com" target="_blank">zoltan@frombach.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I've also heard that older versions of Windows don't put the CPU to<br>
"idle mode" even when there is nothing to do. It is a known problem with<br>
older Windows kernels.<br></blockquote><div><br></div><div>Windows 98 and the like don't idle. It requires software to help idle the CPU usage. So I've read - I believe a table on the libvirt site says Win98 is no longer possible.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Anyway, try to install the latest virtio drivers for Windows if you<br>
don't already have.<br></blockquote><div><br></div><div>I have a WinXP Pro 32bit VM with virtio drivers and it runs just fine.</div><div>I don't watch the load on it, so I don't know if its CPU goes idle. I'll have to take a peek at it next week.</div>
<div><br></div><div>Is the OP absolutely certain that there is no process running that would consume that small amount of CPU? I'd be more concerned if the usage was 10% or greater when the system _should_ be idle.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="HOEnZb"><div class="h5"><br>
On 12/7/2012 9:18 PM, Robert Dinse wrote:<br>
> About the only thing you can do is not run Windows, or at least that<br>
> version, XP does the same thing, continuouslys spins the CPU when there aren't<br>
> any user processes using time. I've heard this is resolved in Windows-7 but<br>
> haven't tried it personally.<br>
><br>
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><br>
> On Fri, 7 Dec 2012, Shawn Everett wrote:<br>
><br>
>> Date: Fri, 7 Dec 2012 12:02:14 -0800<br>
>> From: Shawn Everett <<a href="mailto:shawn@tandac.com">shawn@tandac.com</a>><br>
>> Reply-To: Discussion about the virtualization on CentOS<br>
> <<a href="mailto:centos-virt@centos.org">centos-virt@centos.org</a>><br>
>> To: <a href="mailto:centos-virt@centos.org">centos-virt@centos.org</a><br>
>> Subject: [CentOS-virt] (no subject)<br>
>><br>
>> Hi All,<br>
>><br>
>> I have recently installed CentOS 6.3 with QEMU+KVM for Virtualization.<br>
>><br>
>> I have successfully created a Windows 2003 VM with 4GB of RAM. The host<br>
>> server is an HP ML350 G8 with 24GB RAM and 24 cores. Details of one of<br>
>> the cores is shown below:<br>
>><br>
>> processor : 23<br>
>> vendor_id : GenuineIntel<br>
>> cpu family : 6<br>
>> model : 45<br>
>> model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz<br>
>> stepping : 7<br>
>> cpu MHz : 1200.000<br>
>> cache size : 15360 KB<br>
>> physical id : 1<br>
>> siblings : 12<br>
>> core id : 5<br>
>> cpu cores : 6<br>
>> apicid : 43<br>
>> initial apicid : 43<br>
>> fpu : yes<br>
>> fpu_exception : yes<br>
>> cpuid level : 13<br>
>> wp : yes<br>
>> flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca<br>
>> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx<br>
>> pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology<br>
>> nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2<br>
>> ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm<br>
>> ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid<br>
>> bogomips : 3989.86<br>
>> clflush size : 64<br>
>> cache_alignment : 64<br>
>> address sizes : 46 bits physical, 48 bits virtual<br>
>> power management:<br>
>><br>
>> On an otherwise completely idle system I've noticed the load to be 1.0 to<br>
>> 1.5 range. Running "top" shows the culprit to be: qemu-kvm.<br>
>><br>
>> Is this normal behavior? I would have expected the load to be pretty light.<br>
>><br>
>> Stopping the VM restores the load to normal once again.<br>
>><br>
>> Is there anything I can do to reduce the load?<br>
>><br>
>> Shawn<br>
>><br>
>> _______________________________________________<br>
>> CentOS-virt mailing list<br>
>> <a href="mailto:CentOS-virt@centos.org">CentOS-virt@centos.org</a><br>
>> <a href="http://lists.centos.org/mailman/listinfo/centos-virt" target="_blank">http://lists.centos.org/mailman/listinfo/centos-virt</a><br>
>><br>
> _______________________________________________<br>
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> <a href="mailto:CentOS-virt@centos.org">CentOS-virt@centos.org</a><br>
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><br>
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